ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

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Climate warming during Antarctic ice sheet expansion at the Middle Miocene transition (2014)

Knorr, Gregor ; Lohmann, Gerrit

Nature Publishing Group

In: EPIC3Nature Geoscience, Nature Publishing Group, 7(5), pp. 376-381, ISSN: 1752-0894

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Publikationsdatum: 2014-07-14

Beschreibung: During the Middle Miocene climate transition about 14 million years ago, the Antarctic ice sheet expanded to near-modern volume. Surprisingly, this ice sheet growth was accompanied by a warming in the surface waters of the Southern Ocean, whereas a slight deep-water temperature increase was delayed by more than 200 thousand years. Here we use a coupled atmosphere–ocean model to assess the relative effects of changes in atmospheric CO2 concentration and ice sheet growth on regional and global temperatures. In the simulations, changes in the wind field associated with the growth of the ice sheet induce changes in ocean circulation, deep-water formation and sea-ice cover that result in sea surface warming and deep-water cooling in large swaths of the Atlantic and Indian ocean sectors of the Southern Ocean. We interpret these changes as the dominant ocean surface response to a 100-thousand-year phase of massive ice growth in Antarctica. A rise in global annual mean temperatures is also seen in response to increased Antarctic ice surface elevation. In contrast, the longer-term surface and deep-water temperature trends are dominated by changes in atmospheric CO2 concentration. We therefore conclude that the climatic and oceanographic impacts of the Miocene expansion of the Antarctic ice sheet are governed by a complex interplay between wind field, ocean circulation and the sea-ice system.

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A shift of thermokarst lakes from carbon sources to sinks during the Holocene epoch (2014)

Walter Anthony, K. M. ; Zimov, S. A. ; Grosse, Guido ; [weitere]

Nature Publishing Group

In: EPIC3Nature, Nature Publishing Group, ISSN: 0028-0836

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Publikationsdatum: 2014-07-17

Beschreibung: Thermokarst lakes formed across vast regions of Siberia and Alaska during the last deglaciation and are thought to be a net source of atmospheric methane and carbon dioxide during the Holocene epoch1, 2, 3, 4. However, the same thermokarst lakes can also sequester carbon5, and it remains uncertain whether carbon uptake by thermokarst lakes can offset their greenhouse gas emissions. Here we use field observations of Siberian permafrost exposures, radiocarbon dating and spatial analyses to quantify Holocene carbon stocks and fluxes in lake sediments overlying thawed Pleistocene-aged permafrost. We find that carbon accumulation in deep thermokarst-lake sediments since the last deglaciation is about 1.6 times larger than the mass of Pleistocene-aged permafrost carbon released as greenhouse gases when the lakes first formed. Although methane and carbon dioxide emissions following thaw lead to immediate radiative warming, carbon uptake in peat-rich sediments occurs over millennial timescales. We assess thermokarst-lake carbon feedbacks to climate with an atmospheric perturbation model and find that thermokarst basins switched from a net radiative warming to a net cooling climate effect about 5,000 years ago. High rates of Holocene carbon accumulation in 20 lake sediments (47 ± 10 grams of carbon per square metre per year; mean ± standard error) were driven by thermokarst erosion and deposition of terrestrial organic matter, by nutrient release from thawing permafrost that stimulated lake productivity and by slow decomposition in cold, anoxic lake bottoms. When lakes eventually drained, permafrost formation rapidly sequestered sediment carbon. Our estimate of about 160 petagrams of Holocene organic carbon in deep lake basins of Siberia and Alaska increases the circumpolar peat carbon pool estimate for permafrost regions by over 50 per cent (ref. 6). The carbon in perennially frozen drained lake sediments may become vulnerable to mineralization as permafrost disappears7, 8, 9, potentially negating the climate stabilization provided by thermokarst lakes during the late Holocene.

Repository-Name: EPIC Alfred Wegener Institut

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3

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Abrupt glacial climate shifts controlled by ice sheet changes (2014)

Zhang, Xu ; Lohmann, Gerrit ; Knorr, Gregor ; [weitere]

Nature Publishing Group

In: EPIC3Nature, Nature Publishing Group, 512(7514), pp. 290-294, ISSN: 0028-0836

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Publikationsdatum: 2014-09-04

Beschreibung: During glacial periods of the Late Pleistocene, an abundance of proxy data demonstrates the existence of large and repeated millennial-scale warming episodes, known as Dansgaard–Oeschger (DO) events1. This ubiquitous feature of rapid glacial climate change can be extended back as far as 800,000 years before present (BP) in the ice core record2, and has drawn broad attention within the science and policy-making communities alike3. Many studies have been dedicated to investigating the underlying causes of these changes, but no coherent mechanism has yet been identified3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15. Here we show, by using a comprehensive fully coupled model16, that gradual changes in the height of the Northern Hemisphere ice sheets (NHISs) can alter the coupled atmosphere–ocean system and cause rapid glacial climate shifts closely resembling DO events. The simulated global climate responses—including abrupt warming in the North Atlantic, a northward shift of the tropical rainbelts, and Southern Hemisphere cooling related to the bipolar seesaw—are generally consistent with empirical evidence1, 3, 17. As a result of the coexistence of two glacial ocean circulation states at intermediate heights of the ice sheets, minor changes in the height of the NHISs and the amount of atmospheric CO2 can trigger the rapid climate transitions via a local positive atmosphere–ocean–sea-ice feedback in the North Atlantic. Our results, although based on a single model, thus provide a coherent concept for understanding the recorded millennial-scale variability and abrupt climate changes in the coupled atmosphere–ocean system, as well as their linkages to the volume of the intermediate ice sheets during glacials.

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4

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Using empirical orthogonal functions derived from remote sensing reflectance for the prediction of concentrations of phytoplankton pigments. (2014)

Bracher, Astrid ; Taylor, Marc H. ; Taylor, Bettina ; [weitere]

Copernicus

In: EPIC3Ocean Science Discussions, Copernicus, 11(5), pp. 2073-2117, ISSN: 1812-0822

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Publikationsdatum: 2014-10-14

Beschreibung: The composition and abundance of algal pigments provide information on characteristics of a phytoplankton community in respect to its photoacclimation, overall biomass, and taxonomic composition. Particularly, these pigments play a major role in photoprotection and in the light-driven part of photosynthesis. Most phytoplankton pigments can be measured by High Performance Liquid Chromatography (HPLC) techniques to filtered water samples. This method, like others when water samples have to be analysed in the laboratory, is time consuming and therefore only a limited number of data points can be obtained. In order to receive information on phytoplankton pigment composition with a higher temporal and spatial resolution, we have developed a method to assess pigment concentrations from continuous optical measurements. The method applies an Empirical Orthogonal Function (EOF) analysis to remote sensing reflectance data derived from ship-based hyper-spectral underwater radiometric and from multispectral satellite data (using the MERIS Polymer product developed by Steinmetz et al., 2011) measured in the Eastern Tropical Atlantic. Subsequently we developed statistically linear models with measured (collocated) pigment concentrations as the response variable and EOF loadings as predictor variables. The model results, show that surface concentrations of a suite of pigments and pigment groups can be well predicted from the ship-based reflectance measurements, even when only a multi-spectral resolution is chosen (i.e. eight bands similar to those used by MERIS). Based on the MERIS reflectance data, concentrations of total and monovinyl chlorophyll a and the groups of photoprotective and photosynthetic carotenoids can be predicted with high quality. The fitted statistical model constructed on the satellite reflectance data as input was applied to one month of MERIS Polymer data to predict the concentration of those pigment groups for the whole Eastern Tropical Atlantic area. Bootstrapping explorations of cross-validation error indicate that the method can produce reliable predictions with relatively small data sets (e.g., 〈 50 collocated values of reflectance and pigment concentration). The method allows for the derivation of time series from continuous reflectance data of various pigment groups at various regions, which can be used to study variability and change of phytoplankton composition and photo-physiology.

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5

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Ups and downs in western Crete (Hellenic subduction zone) (2014)

Tiberti, M. M. ; Basili, R. ; Vannoli, P.

Nature Publishing Group

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Publikationsdatum: 2017-04-04

Beschreibung: Studies of past sea-level markers are commonly used to unveil the tectonic history and seismic behavior of subduction zones. We present new evidence on vertical motions of the Hellenic subduction zone as resulting from a suite of Late Pleistocene - Holocene shorelines in western Crete (Greece). Shoreline ages obtained by AMS radiocarbon dating of seashells, together with the reappraisal of shoreline ages from previous works, testify a long-term uplift rate of 2.5-2.7 mm/y. This average value, however, includes periods in which the vertical motions vary significantly: 2.6-3.2 mm/y subsidence rate from 42 ka to 23 ka, followed by ~7.7 mm/y sustained uplift rate from 23 ka to present. The last ~5 ky shows a relatively slower uplift rate of 3.0-3.3 mm/y, yet slightly higher than the long-term average. A preliminary tectonic model attempts at explaining these up and down motions by across-strike partitioning of fault activity in the subduction zone.

Beschreibung: Published

Beschreibung: 5677

Beschreibung: 2T. Tettonica attiva

Beschreibung: JCR Journal

Beschreibung: restricted

Schlagwort(e): coastal geomorphology ; tectonic rates ; paleoshorelines ; subduction ; Crete ; 04. Solid Earth::04.04. Geology::04.04.03. Geomorphology ; 04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics

Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)

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6

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Lava flow hazards at Mount Etna: constraints imposed by eruptive history and numerical simulations (2014)

Del Negro, C. ; Cappello, A. ; Neri, M. ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2017-04-04

Beschreibung: Improving lava flow hazard assessment is one of the most important and challenging fields of volcanology, and has an immediate and practical impact on society. Here, we present a methodology for the quantitative assessment of lava flow hazards based on a combination of field data, numerical simulations and probability analyses. With the extensive data available on historic eruptions of Mt. Etna, going back over 2000 years, it has been possible to construct two hazard maps, one for flank and the other for summit eruptions, allowing a quantitative analysis of the most likely future courses of lava flows. The effective use of hazard maps of Etna may help in minimizing the damage from volcanic eruptions through correct land use in densely urbanized area with a population of almost one million people. Although this study was conducted on Mt. Etna, the approach used is designed to be applicable to other volcanic areas.

Beschreibung: This work was developed within the framework of TecnoLab, the Laboratory for Technological Advance in Volcano Geophysics organized by INGV-CT, DIEES-UNICT, and DMI-UNICT.

Beschreibung: Published

Beschreibung: 3493

Beschreibung: 1V. Storia e struttura dei sistemi vulcanici

Beschreibung: 2V. Dinamiche di unrest e scenari pre-eruttivi

Beschreibung: 3V. Dinamiche e scenari eruttivi

Beschreibung: 4V. Vulcani e ambiente

Beschreibung: 6A. Monitoraggio ambientale, sicurezza e territorio

Beschreibung: 3IT. Calcolo scientifico e sistemi informatici

Beschreibung: JCR Journal

Beschreibung: restricted

Schlagwort(e): Lava flow hazard ; Etna ; 04. Solid Earth::04.04. Geology::04.04.99. General or miscellaneous ; 04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous ; 05. General::05.01. Computational geophysics::05.01.99. General or miscellaneous ; 05. General::05.02. Data dissemination::05.02.99. General or miscellaneous ; 05. General::05.08. Risk::05.08.99. General or miscellaneous

Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)

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7

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Empirical sea ice thickness retrieval during the freeze up period from SMOS high incident angle observations (2014)

Huntemann, Marcus ; Heygster, Georg ; Kaleschke, Lars ; [weitere]

Copernicus

In: EPIC3The Cryosphere, Copernicus, 8(2), pp. 439-451, ISSN: 1994-0416

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Publikationsdatum: 2019-07-17

Beschreibung: Sea ice thickness information is important for sea ice modelling and ship operations. Here a method to detect the thickness of sea ice up to 50 cm during the freeze-up season based on high incidence angle observations of the Soil Moisture and Ocean Salinity (SMOS) satellite working at 1.4 GHz is suggested. By comparison of thermodynamic ice growth data with SMOS brightness temperatures, a high correlation to intensity and an anticorrelation to the difference between vertically and horizontally polarised brightness temperatures at incidence angles between 40 and 50° are found and used to develop an empirical retrieval algorithm sensitive to thin sea ice up to 50 cm thickness. The algorithm shows high correlation with ice thickness data from airborne measurements and reasonable ice thickness patterns for the Arctic freeze-up period.

Repository-Name: EPIC Alfred Wegener Institut

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8

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SMOS derived sea ice thickness: algorithm baseline, product specifications and initial verification (2014)

Tian-Kunze, Xiangshan ; Kaleschke, Lars ; Maaß, N. ; [weitere]

Copernicus

In: EPIC3The Cryosphere, Copernicus, 8(3), pp. 997-1018, ISSN: 1994-0416

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Publikationsdatum: 2014-06-02

Beschreibung: Following the launch of ESA's Soil Moisture and Ocean Salinity (SMOS) mission, it has been shown that brightness temperatures at a low microwave frequency of 1.4 GHz (L-band) are sensitive to sea ice properties. In the first demonstration study, sea ice thickness up to 50 cm has been derived using a semi-empirical algorithm with constant tie-points. Here, we introduce a novel iterative retrieval algorithm that is based on a thermodynamic sea ice model and a three-layer radiative transfer model, which explicitly takes variations of ice temperature and ice salinity into account. In addition, ice thickness variations within the SMOS spatial resolution are considered through a statistical thickness distribution function derived from high-resolution ice thickness measurements from NASA's Operation IceBridge campaign. This new algorithm has been used for the continuous operational production of a SMOS-based sea ice thickness data set from 2010 on. The data set is compared to and validated with estimates from assimilation systems, remote sensing data, and airborne electromagnetic sounding data. The comparisons show that the new retrieval algorithm has a considerably better agreement with the validation data and delivers a more realistic Arctic-wide ice thickness distribution than the algorithm used in the previous study (Kaleschke et al., 2012).

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9

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A data-constrained model for compatibility check of remotely sensed basal melting with the hydrography in front of Antarctic ice shelves (2014)

Olbers, D. ; Hellmer, H. H. ; Buck, F. F. J. H.

Copernicus

In: EPIC3The Cryosphere Discussions, Copernicus, 8(1), pp. 919-951, ISSN: 1994-0440

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Publikationsdatum: 2019-07-16

Beschreibung: The ice shelf caverns around Antarctica are sources of cold and fresh water which contributes to the formation of Antarctic bottom water and thus to the ventilation of the deep basins of the World Ocean. While a realistic simulation of the cavern circulation requires high resolution, because of the complicated bottom topography and ice shelf morphology, the physics of melting and freezing at the ice shelf base is relatively simple. We have developed an analytically solvable box model of the cavern thermohaline state, using the formulation of melting and freezing as in Olbers and Hellmer (2010). There is high resolution along the cavern's path of the overturning circulation whereas the cross-path resolution is fairly coarse. The circulation in the cavern is prescribed and used as a tuning parameter to constrain the solution by attempting to match observed ranges for outflow temperature and salinity at the ice shelf front as well as of the mean basal melt rate. The method, tested for six Antarctic ice shelves, can be used for a quick estimate of melt/freeze rates and the overturning rate in particular caverns, given the temperature and salinity of the inflow and the above mentioned constrains for outflow and melting. In turn, the model can also be used for testing the compatibility of remotely sensed basal mass loss with observed cavern inflow characteristics.

Repository-Name: EPIC Alfred Wegener Institut

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10

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Minimal change in Antarctic Circumpolar Current flow speed between the last glacial and Holocene (2014)

McCave, I. N. ; Crowhurst, S. J. ; Kuhn, G. ; [weitere]

Nature Publishing Group

In: EPIC3Nature Geoscience, Nature Publishing Group, 7(2), pp. 113-116, ISSN: 1752-0894

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Publikationsdatum: 2018-08-10

Beschreibung: The Antarctic Circumpolar Current is key to the mixing and ventilation of the world’s oceans1, 2, 3, 4, 5. This current flows from west to east between about 45° and 70° S (refs 1, 2, 3) connecting the Atlantic, Pacific and Indian oceans, and is driven by westerly winds and buoyancy forcing. High levels of productivity in the current regulate atmospheric CO2 concentrations6. Reconstructions of the current during the last glacial period suggest that flow speeds were faster7 or similar8 to present, and it is uncertain whether the strength and position of the westerly winds changed9, 10, 11. Here we reconstruct Antarctic Circumpolar Current bottom speeds through the constricting Drake Passage and Scotia Sea during the Last Glacial Maximum and Holocene based on the mean grain size of sortable silt from a suite of sediment cores. We find essentially no change in bottom flow speeds through the region, and, given that the momentum imparted by winds, and modulated by sea-ice cover, is balanced by the interaction of these flows with the seabed, this argues against substantial changes in wind stress. However, glacial flow speeds in the sea-ice zone12 south of 56° S were significantly slower than present, whereas flow in the north was faster, but not significantly so. We suggest that slower flow over the rough topography south of 56° S may have reduced diapycnal mixing in this region during the last glacial period, possibly reducing the diapycnal contribution to the Southern Ocean overturning circulation.

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11

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An update to the Surface Ocean CO2 Atlas (SOCAT version 2) (2014)

Bakker, D. C. E. ; Pfeil, B. ; Smith, K. ; [weitere]

Copernicus

In: EPIC3Earth System Science Data, Copernicus, 6(1), pp. 69-90, ISSN: 1866-3516

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Publikationsdatum: 2015-03-19

Beschreibung: The Surface Ocean CO2 Atlas (SOCAT), an activity of the international marine carbon research community, provides access to synthesis and gridded fCO2 (fugacity of carbon dioxide) products for the surface oceans. Version 2 of SOCAT is an update of the previous release (version 1) with more data (increased from 6.3 million to 10.1 million surface water fCO2 values) and extended data coverage (from 1968–2007 to 1968–2011). The quality control criteria, while identical in both versions, have been applied more strictly in version 2 than in version 1. The SOCAT website (http://www.socat.info/) has links to quality control comments, metadata, individual data set files, and synthesis and gridded data products. Interactive online tools allow visitors to explore the richness of the data. Applications of SOCAT include process studies, quantification of the ocean carbon sink and its spatial, seasonal, year-to-year and longerterm variation, as well as initialisation or validation of ocean carbon models and coupled climate-carbon models.

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12

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Networks from Flows - From Dynamics to Topology (2014)

Molkenthin, Nora ; Rehfeld, Kira ; Marwan, Norbert ; [weitere]

Nature Publishing Group

In: EPIC3Scientific Reports, Nature Publishing Group, 4(4119), ISSN: 2045-2322

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Publikationsdatum: 2019-07-17

Beschreibung: Complex network approaches have recently been applied to continuous spatial dynamical systems, like climate, successfully uncovering the system's interaction structure. However the relationship between the underlying atmospheric or oceanic flow's dynamics and the estimated network measures have remained largely unclear. We bridge this crucial gap in a bottom-up approach and define a continuous analytical analogue of Pearson correlation networks for advection-diffusion dynamics on a background flow. Analysing complex networks of prototypical flows and from time series data of the equatorial Pacific, we find that our analytical model reproduces the most salient features of these networks and thus provides a general foundation of climate networks. The relationships we obtain between velocity field and network measures show that line-like structures of high betweenness mark transition zones in the flow rather than, as previously thought, the propagation of dynamical information.

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13

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Can sparse proxy data constrain the strength of the Atlantic meridional overturning circulation? (2014)

Kurahashi-Nakamura, T. ; Losch, M. ; Paul, A.

Copernicus

In: EPIC3Geoscientific Model Development, Copernicus, 7(1), pp. 419-432, ISSN: 1991-9603

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Publikationsdatum: 2019-07-17

Beschreibung: In a feasibility study, the potential of proxy data for the temperature and salinity during the Last Glacial Maximum (LGM, about 19 000 to 23 000 years before present) in constraining the strength of the Atlantic meridional overturning circulation (AMOC) with a general ocean circulation model was explored. The proxy data were simulated by drawing data from four different model simulations at the ocean sediment core locations of the Multiproxy Approach for the Reconstruction of the Glacial Ocean surface (MARGO) project, and perturbing these data with realistic noise estimates. The results suggest that our method has the potential to provide estimates of the past strength of the AMOC even from sparse data, but in general, paleo-sea-surface temperature data without additional prior knowledge about the ocean state during the LGM is not adequate to constrain the model. On the one hand, additional data in the deep-ocean and salinity data are shown to be highly important in estimating the LGM circulation. On the other hand, increasing the amount of surface data alone does not appear to be enough for better estimates. Finally, better initial guesses to start the state estimation procedure would greatly improve the performance of the method. Indeed, with a sufficiently good first guess, just the sea-surface temperature data from the MARGO project promise to be sufficient for reliable estimates of the strength of the AMOC.

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Identification of photosynthetic plankton communities using sedimentary ancient DNA and their response to late-Holocene climate change on the Tibetan Plateau (2014)

Hou, Weiguo ; Dong, Hailiang ; Li, Gaoyuan ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2022-05-25

Beschreibung: © The Author(s), 2014]. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Scientific Reports 4 (2014): 6648, doi:10.1038/srep06648.

Beschreibung: Sediments from Tibetan lakes in NW China are potentially sensitive recorders of climate change and its impact on ecosystem function. However, the important plankton members in many Tibetan Lakes do not make and leave microscopically diagnostic features in the sedimentary record. Here we established a taxon-specific molecular approach to specifically identify and quantify sedimentary ancient DNA (sedaDNA) of non-fossilized planktonic organisms preserved in a 5-m sediment core from Kusai Lake spanning the last 3100 years. The reliability of the approach was validated with multiple independent genetic markers. Parallel analyses of the geochemistry of the core and paleo-climate proxies revealed that Monsoon strength-driven changes in nutrient availability, temperature, and salinity as well as orbitally-driven changes in light intensity were all responsible for the observed temporal changes in the abundance of two dominant phytoplankton groups in the lake, Synechococcus (cyanobacteria) and Isochrysis (haptophyte algae). Collectively our data show that global and regional climatic events exhibited a strong influence on the paleoecology of phototrophic plankton in Kusai Lake.

Beschreibung: This research was supported by grants from the National Natural Science Foundation of China (Grant Nos. 41030211 and 41302022), the National Basic Research Program of China (Grant No. 2011CB808800), and State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Nos GBL11410 and GBL11201).

Repository-Name: Woods Hole Open Access Server

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Permafrost thawing as a possible source of abrupt carbon release at the onset of the Bølling/Allerød (2014)

Köhler, Peter ; Knorr, Gregor ; Bard, Edouard

Nature Publishing Group

In: EPIC3Nature Communications, Nature Publishing Group, 5, pp. 5520, ISSN: 2041-1723

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Publikationsdatum: 2016-06-13

Beschreibung: One of the most abrupt and yet unexplained past rises in atmospheric CO2 (〉10 p.p.m.v. in two centuries) occurred in quasi-synchrony with abrupt northern hemispheric warming into the Bølling/Allerød, ~14,600 years ago. Here we use a U/Th-dated record of atmospheric Δ14C from Tahiti corals to provide an independent and precise age control for this CO2 rise. We also use model simulations to show that the release of old (nearly 14C-free) carbon can explain these changes in CO2 and Δ14C. The Δ14C record provides an independent constraint on the amount of carbon released (~125 Pg C). We suggest, in line with observations of atmospheric CH4 and terrigenous biomarkers, that thawing permafrost in high northern latitudes could have been the source of carbon, possibly with contribution from flooding of the Siberian continental shelf during meltwater pulse 1A. Our findings highlight the potential of the permafrost carbon reservoir to modulate abrupt climate changes via greenhouse-gas feedbacks.

Repository-Name: EPIC Alfred Wegener Institut

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Antarctic-wide array of high-resolution ice core records reveals pervasive lead pollution began in 1889 and persists today (2014)

McConnell, J. R. ; Maselli, O. J. ; Sigl, M. ; [weitere]

Nature Publishing Group

In: EPIC3Scientific Reports, Nature Publishing Group, 4, pp. 5848, ISSN: 2045-2322

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Publikationsdatum: 2014-12-17

Beschreibung: Interior Antarctica is among the most remote places on Earth and was thought to be beyond the reach of human impacts when Amundsen and Scott raced to the South Pole in 1911. Here we show detailed measurements from an extensive array of 16 ice cores quantifying substantial toxic heavy metal lead pollution at South Pole and throughout Antarctica by 1889 – beating polar explorers by more than 22 years. Unlike the Arctic where lead pollution peaked in the 1970s, lead pollution in Antarctica was as high in the early 20th century as at any time since industrialization. The similar timing and magnitude of changes in lead deposition across Antarctica, as well as the characteristic isotopic signature of Broken Hill lead found throughout the continent, suggest that this single emission source in southern Australia was responsible for the introduction of lead pollution into Antarctica at the end of the 19th century and remains a significant source today. An estimated 660 t of industrial lead have been deposited over Antarctica during the past 130 years as a result of mid-latitude industrial emissions, with regional-to-global scale circulation likely modulating aerosol concentrations. Despite abatement efforts, significant lead pollution in Antarctica persists into the 21st century.

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Ice sheet dynamics within an earth system model: downscaling, coupling and first results (2014)

Barbi, Dirk ; Lohmann, Gerrit ; Grosfeld, Klaus ; [weitere]

Copernicus

In: EPIC3Geoscientific Model Development, Copernicus, 7(5), pp. 2003-2013, ISSN: 1991-9603

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Publikationsdatum: 2016-12-09

Beschreibung: We present first results from a coupled model setup, consisting of the state-of-the-art ice sheet model RIMBAY (Revised Ice Model Based on frAnk pattYn), and the community earth system model COSMOS. We show that special care has to be provided in order to ensure physical distributions of the forcings as well as numeric stability of the involved models. We demonstrate that a suitable statistical downscaling is crucial for ice sheet stability, especially for southern Greenland where surface temperatures are close to the melting point. The downscaling of net snow accumulation is based on an empirical relationship between surface slope and rainfall. The simulated ice sheet does not show dramatic loss of ice volume for pre-industrial conditions and is comparable with present-day ice orography. A sensitivity study with high CO2 level is used to demonstrate the effects of dynamic ice sheets onto climate compared to the standard setup with prescribed ice sheets.

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Virtual finger boosts three-dimensional imaging and microsurgery as well as terabyte volume image visualization and analysis (2014)

Peng, Hanchuan ; Tang, Jianyong ; Xiao, Hang ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: © The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 5 (2014): 4342, doi:10.1038/ncomms5342.

Beschreibung: Three-dimensional (3D) bioimaging, visualization and data analysis are in strong need of powerful 3D exploration techniques. We develop virtual finger (VF) to generate 3D curves, points and regions-of-interest in the 3D space of a volumetric image with a single finger operation, such as a computer mouse stroke, or click or zoom from the 2D-projection plane of an image as visualized with a computer. VF provides efficient methods for acquisition, visualization and analysis of 3D images for roundworm, fruitfly, dragonfly, mouse, rat and human. Specifically, VF enables instant 3D optical zoom-in imaging, 3D free-form optical microsurgery, and 3D visualization and annotation of terabytes of whole-brain image volumes. VF also leads to orders of magnitude better efficiency of automated 3D reconstruction of neurons and similar biostructures over our previous systems. We use VF to generate from images of 1,107 Drosophila GAL4 lines a projectome of a Drosophila brain.

Beschreibung: This work was mainly supported by Howard Hughes Medical Institute. H.P. is currently supported by the Allen Institute for Brain Science. R.W.T. and A.M. were supported by a grant MH071739 (MERIT).

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Eruption of a deep-sea mud volcano triggers rapid sediment movement (2014)

Feseker, Tomas ; Boetius, Antje ; Wenzhofer, Frank ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: © The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 5 (2014): 5385, doi:10.1038/ncomms6385.

Beschreibung: Submarine mud volcanoes are important sources of methane to the water column. However, the temporal variability of their mud and methane emissions is unknown. Methane emissions were previously proposed to result from a dynamic equilibrium between upward migration and consumption at the seabed by methane-consuming microbes. Here we show non-steady-state situations of vigorous mud movement that are revealed through variations in fluid flow, seabed temperature and seafloor bathymetry. Time series data for pressure, temperature, pH and seafloor photography were collected over 431 days using a benthic observatory at the active Håkon Mosby Mud Volcano. We documented 25 pulses of hot subsurface fluids, accompanied by eruptions that changed the landscape of the mud volcano. Four major events triggered rapid sediment uplift of more than a metre in height, substantial lateral flow of muds at average velocities of 0.4 m per day, and significant emissions of methane and CO2 from the seafloor.

Beschreibung: Participation of the Sentry AUV and TETHYS team from WHOI was funded by the Arctic Research Initiative of WHOI’s Ocean and Climate Change Institute and the NASA ASTEP grant NNX09AB76G. Additional funds were made available by the AWI, the Max Planck Society and the DFG METEOR/MERIAN programme, as well as the Leibniz programme to A.B.

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Intensification of the meridional temperature gradient in the Great Barrier Reef following the Last Glacial Maximum (2014)

Felis, Thomas ; McGregor, Helen V. ; Linsley, Braddock K. ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: © The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 5 (2014): 4102, doi:10.1038/ncomms5102.

Beschreibung: Tropical south-western Pacific temperatures are of vital importance to the Great Barrier Reef (GBR), but the role of sea surface temperatures (SSTs) in the growth of the GBR since the Last Glacial Maximum remains largely unknown. Here we present records of Sr/Ca and δ18O for Last Glacial Maximum and deglacial corals that show a considerably steeper meridional SST gradient than the present day in the central GBR. We find a 1–2 °C larger temperature decrease between 17° and 20°S about 20,000 to 13,000 years ago. The result is best explained by the northward expansion of cooler subtropical waters due to a weakening of the South Pacific gyre and East Australian Current. Our findings indicate that the GBR experienced substantial meridional temperature change during the last deglaciation, and serve to explain anomalous deglacial drying of northeastern Australia. Overall, the GBR developed through significant SST change and may be more resilient than previously thought.

Beschreibung: Funding was provided by Deutsche Forschungsgemeinschaft (FE 615/4-1), Australian Research Council (Discovery grant DP1094001), Australia and New Zealand IODP Consortium, Australian Institute of Nuclear Science and Engineering, Natural Environmental Research Council (NE/H014136/1, NE/H014268/1), the Cooperative Research Program of the Center for Advanced Marine Core Research (10B039, 11A013, 11B041), Ministry of Earth Sciences, Govt. of India (with partial support from DST & ISRO-GBP) and Japan Society for the Promotion of Science (JSPS NEXT-GR031).

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Counting whales in a challenging, changing environment (2014)

Williams, R. ; Kelly, N. ; Boebel, Olaf ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: © The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Scientific Reports 4 (2014): 4170, doi:10.1038/srep04170.

Beschreibung: Estimating abundance of Antarctic minke whales is central to the International Whaling Commission's conservation and management work and understanding impacts of climate change on polar marine ecosystems. Detecting abundance trends is problematic, in part because minke whales are frequently sighted within Antarctic sea ice where navigational safety concerns prevent ships from surveying. Using icebreaker-supported helicopters, we conducted aerial surveys across a gradient of ice conditions to estimate minke whale density in the Weddell Sea. The surveys revealed substantial numbers of whales inside the sea ice. The Antarctic summer sea ice is undergoing rapid regional change in annual extent, distribution, and length of ice-covered season. These trends, along with substantial interannual variability in ice conditions, affect the proportion of whales available to be counted by traditional shipboard surveys. The strong association between whales and the dynamic, changing sea ice requires reexamination of the power to detect trends in whale abundance or predict ecosystem responses to climate change.

Beschreibung: This work received funding from the following institutions: Alfred Wegener Institute for Polar and Marine Research (AWI); Dutch Ministry of Agriculture, Nature and Food Quality (EL & I); German Federal Ministry of Food, Agriculture and Consumer Protection (BMELV); German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU); the Institute for Marine Resources and Ecosystem Studies (Wageningen IMARES); Johann Heinrich von Thu¨nen Institute (Federal Research Institute for Rural Areas, Forestry and Fisheries); the Netherlands Polar Programme (NPP) of the Netherlands Organisation for Scientific Research (NOW); Research and Technology Centre Westcoast (FTZ) of the University Kiel. RW was funded by a Marie Curie International Incoming Fellowship within the 7th European Community Framework Programme (proposal Nu 253407 (call reference: FP7- PEOPLE-2009-IIF).

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MIxS-BE : a MIxS extension defining a minimum information standard for sequence data from the built environment (2014)

Glass, Elizabeth M. ; Dribinsky, Yekaterina ; Yilmaz, Pelin ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: © The Author(s), 2013. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in ISME Journal 8 (2014): 1-3, doi:10.1038/ismej.2013.176.

Beschreibung: The need for metadata standards for microbe sampling in the built environment.

Beschreibung: We would like to thank the Alfred P Sloan Foundation grant FP047325-01-PR for support for this project.

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A reversal of fortunes : climate change ‘winners’ and ‘losers’ in Antarctic Peninsula penguins (2014)

Clucas, Gemma V. ; Dunn, Michael J. ; Dyke, Gareth ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: © The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Scientific Reports 4 (2014): 5024, doi:10.1038/srep05024.

Beschreibung: Climate change is a major threat to global biodiversity. Antarctic ecosystems are no exception. Investigating past species responses to climatic events can distinguish natural from anthropogenic impacts. Climate change produces ‘winners’, species that benefit from these events and ‘losers’, species that decline or become extinct. Using molecular techniques, we assess the demographic history and population structure of Pygoscelis penguins in the Scotia Arc related to climate warming after the Last Glacial Maximum (LGM). All three pygoscelid penguins responded positively to post-LGM warming by expanding from glacial refugia, with those breeding at higher latitudes expanding most. Northern (Pygoscelis papua papua) and Southern (Pygoscelis papua ellsworthii) gentoo sub-species likely diverged during the LGM. Comparing historical responses with the literature on current trends, we see Southern gentoo penguins are responding to current warming as they did during post-LGM warming, expanding their range southwards. Conversely, Adélie and chinstrap penguins are experiencing a ‘reversal of fortunes’ as they are now declining in the Antarctic Peninsula, the opposite of their response to post-LGM warming. This suggests current climate warming has decoupled historic population responses in the Antarctic Peninsula, favoring generalist gentoo penguins as climate change ‘winners’, while Adélie and chinstrap penguins have become climate change ‘losers’.

Beschreibung: We thank the Zoological Society of London, Quark Expeditions, Exodus Travels ltd., Oceanites, the Holly Hill Charitable Trust, the Charities Advisory Trust and an U.S. National Science Foundation (NSF) Office of Polar Programs grant (ANT-0739575) for funding.

Schlagwort(e): Climate-change ecology ; Molecular ecology ; Molecular evolution ; Population genetics

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Horizontal eddy energy flux in the world oceans diagnosed from altimetry data (2014)

Xu, Chi ; Shang, Xiao-Dong ; Huang, Rui Xin

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: © The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Scientific Reports 4 (2014): 5316, doi:10.1038/srep05316.

Beschreibung: During the propagation of coherent mesoscale eddies, they directly or indirectly induce many effects and interactions at different scales, implying eddies are actually serving as a kind of energy carrier or energy source for these eddy-related dynamic processes. To quantify this dynamically significant energy flow, the multi-year averaged horizontal eddy energy fluxes (EEFs) were estimated by using satellite altimetry data and a two-layer model based on hydrographic climatology. There is a strong net westward transport of eddy energy estimated at the mean value of ~13.3 GW north of 5°N and ~14.6 GW at the band 5°S ~ 44°S in the Southern Hemisphere. However, poleward of 44°S east-propagating eddies carry their energy eastward with an averaged net flux of ~3.2 GW. If confirmed, it would signify that geostrophic eddies not only contain the most of oceanic kinetic energy (KE), but also carry and spread a significant amount of energy with them.

Beschreibung: This study is supported by Grants XDA11010202, 2011CB403505, 2013CB430303; Projects 41306016, U1033002, 40976021 of NNSFC and LTOZZ1304.

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Oceanography : oxygen and climate dynamics (2014)

Doney, Scott C. ; Karnauskas, Kristopher B.

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: Author Posting. © The Author(s), 2014. This is the author's version of the work. It is posted here by permission of Nature Publishing Group for personal use, not for redistribution. The definitive version was published in Nature Climate Change 4 (2014): 862-863, doi:10.1038/nclimate2386.

Beschreibung: Low oxygen levels in tropical oceans shape marine ecosystems and biogeochemistry with climate change expected to expand these regions. Now, a study indicates that regional dynamics control tropical oxygen trends, bucking projected global reductions in ocean oxygen.

Beschreibung: 2015-03-25

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Extreme diving behaviour in devil rays links surface waters and the deep ocean (2014)

Thorrold, Simon R. ; Afonso, Pedro ; Fontes, Jorge ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: © The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 5 (2014): 4274, doi:10.1038/ncomms5274.

Beschreibung: Ecological connections between surface waters and the deep ocean remain poorly studied despite the high biomass of fishes and squids residing at depths beyond the euphotic zone. These animals likely support pelagic food webs containing a suite of predators that include commercially important fishes and marine mammals. Here we deploy pop-up satellite archival transmitting tags on 15 Chilean devil rays (Mobula tarapacana) in the central North Atlantic Ocean, which provide movement patterns of individuals for up to 9 months. Devil rays were considered surface dwellers but our data reveal individuals descending at speeds up to 6.0 m s−1 to depths of almost 2,000 m and water temperatures 〈4 °C. The shape of the dive profiles suggests that the rays are foraging at these depths in deep scattering layers. Our results provide evidence of an important link between predators in the surface ocean and forage species occupying pelagic habitats below the euphotic zone in ocean ecosystems.

Beschreibung: This research was partially supported by the Portuguese Foundation for Science and Technology/Ministry of Education and Science (FCT/MCTES-MEC) through individual support to P.A. (Cieˆncia 2008/POPH/QREN) and J.F. (SFRH/BPD/66532/2009) and the LARSyS Strategic Project (PEst/OE/EEI/LA00009/2011). This study was support by the US National Science Foundation (OCE 0825148 to S.R.T. and G.B.S.), The Harrison Foundation, Rodney and Elizabeth Berens, the King Abdullah University of Science and Technology (baseline research funds to M.L.B.) and the Woods Hole Oceanographic Institution.

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Antarctic-wide array of high-resolution ice core records reveals pervasive lead pollution began in 1889 and persists today (2014)

McConnell, Joseph R. ; Maselli, Olivia J. ; Sigl, Michael ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: © The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Scientific Reports 4 (2014): 5848, doi:10.1038/srep05848.

Beschreibung: Interior Antarctica is among the most remote places on Earth and was thought to be beyond the reach of human impacts when Amundsen and Scott raced to the South Pole in 1911. Here we show detailed measurements from an extensive array of 16 ice cores quantifying substantial toxic heavy metal lead pollution at South Pole and throughout Antarctica by 1889 – beating polar explorers by more than 22 years. Unlike the Arctic where lead pollution peaked in the 1970s, lead pollution in Antarctica was as high in the early 20th century as at any time since industrialization. The similar timing and magnitude of changes in lead deposition across Antarctica, as well as the characteristic isotopic signature of Broken Hill lead found throughout the continent, suggest that this single emission source in southern Australia was responsible for the introduction of lead pollution into Antarctica at the end of the 19th century and remains a significant source today. An estimated 660 t of industrial lead have been deposited over Antarctica during the past 130 years as a result of mid-latitude industrial emissions, with regional-to-global scale circulation likely modulating aerosol concentrations. Despite abatement efforts, significant lead pollution in Antarctica persists into the 21st century.

Beschreibung: This work primarily was supported by the U.S. National Science Foundation Division of Polar Programs (research grants 9903744, 0538427, 0538416, 0968391, 1142166, 0632031; instrument grants 0216552, 0421412).

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How unique was Hurricane Sandy? Sedimentary reconstructions of extreme flooding from New York Harbor (2014)

Brandon, Christine M. ; Woodruff, Jonathan D. ; Donnelly, Jeffrey P. ; [weitere]

Nature Publishing Group

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Publikationsdatum: 2022-05-26

Beschreibung: © The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Scientific Reports 4 (2014): 7366, doi:10.1038/srep07366.

Beschreibung: The magnitude of flooding in New York City by Hurricane Sandy is commonly believed to be extremely rare, with estimated return periods near or greater than 1000 years. However, the brevity of tide gauge records result in significant uncertainties when estimating the uniqueness of such an event. Here we compare resultant deposition by Hurricane Sandy to earlier storm-induced flood layers in order to extend records of flooding to the city beyond the instrumental dataset. Inversely modeled storm conditions from grain size trends show that a more compact yet more intense hurricane in 1821 CE probably resulted in a similar storm tide and a significantly larger storm surge. Our results indicate the occurrence of additional flood events like Hurricane Sandy in recent centuries, and highlight the inadequacies of the instrumental record in estimating current flood risk by such extreme events.

Beschreibung: Funding for this work was provided by the Hudson River Foundation Expedited Grant #004/12E, the Hudson River Foundation Graduate Fellowship 02–13, the National Science Foundation (RAPID grant #1313859 and instrument and facility support via grant IF-0949313), and the Dalio Explore Fund.

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Non-invasive fetal ECG analysis (2014)

Clifford, Gari D ; Silva, Ikaro ; Behar, Joachim ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(8): 1521-1536. Published 2014 Jul 29. doi: 10.1088/0967-3334/35/8/1521.

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Publikationsdatum: 2014-07-29

Print ISSN: 0967-3334

Digitale ISSN: 1361-6579

Thema: Medizin , Physik

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Differential diagnosis of Raynaud’s phenomenon based on modeling of finger thermoregulation (2014)

Ismail, E ; Orlando, G ; Corradini, M L ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(4): 703-716. Published 2014 Mar 12. doi: 10.1088/0967-3334/35/4/703.

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Publikationsdatum: 2014-03-12

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Thema: Medizin , Physik

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An ECG simulator for generating maternal-foetal activity mixtures on abdominal ECG recordings (2014)

Behar, Joachim ; Andreotti, Fernando ; Zaunseder, Sebastian ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(8): 1537-1550. Published 2014 Jul 29. doi: 10.1088/0967-3334/35/8/1537.

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Microvascular imaging: techniques and opportunities for clinical physiological measurements (2014)

Allen, John ; Howell, Kevin

Institute of Physics

In: Physiological Measurement. 2014; 35(7): R91-R141. Published 2014 Jun 09. doi: 10.1088/0967-3334/35/7/r91.

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Publikationsdatum: 2014-06-09

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Influence of physiological sources on the impedance cardiogram analyzed using 4D FEM simulations (2014)

Ulbrich, Mark ; Mühlsteff, Jens ; Leonhardt, Steffen ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(7): 1451-1468. Published 2014 Jun 05. doi: 10.1088/0967-3334/35/7/1451.

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Publikationsdatum: 2014-06-05

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Thema: Medizin , Physik

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Comparison of self-reported measure of sitting time (IPAQ) with objective measurement (activPAL) (2014)

Chastin, S F M ; Culhane, B ; Dall, P M

Institute of Physics

In: Physiological Measurement. 2014; 35(11): 2319-2328. Published 2014 Oct 23. doi: 10.1088/0967-3334/35/11/2319.

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Publikationsdatum: 2014-10-23

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Thema: Medizin , Physik

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Local dynamics of heart rate: detection and prognostic implications (2014)

Moss, Travis J ; Lake, Douglas E ; Moorman, J Randall

Institute of Physics

In: Physiological Measurement. 2014; 35(10): 1929-1942. Published 2014 Sep 17. doi: 10.1088/0967-3334/35/10/1929.

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Thema: Medizin , Physik

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Comparison of total haemoglobin mass measured with the optimized carbon monoxide rebreathing method across different Radiometer™ ABL-80 and OSM-3 hemoximeters (2014)

Turner, G ; Richardson, A J ; Maxwell, N S ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(12): N41-N49. Published 2014 Nov 24. doi: 10.1088/0967-3334/35/12/n41.

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Sensitivity and specificity of hypopnoea detection using nasal pressure in the presence of a nasal expiratory resistive device (Provent®) (2014)

Milne, Stephen ; Amis, Terence C ; Wheatley, John R ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(12): 2447-2458. Published 2014 Nov 12. doi: 10.1088/0967-3334/35/12/2447.

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Valid detection of self-propelled wheelchair driving with two accelerometers (2014)

Kooijmans, H ; Horemans, H L D ; Stam, H J ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(11): 2297-2306. Published 2014 Oct 23. doi: 10.1088/0967-3334/35/11/2297.

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A multi-step method with signal quality assessment and fine-tuning procedure to locate maternal and fetal QRS complexes from abdominal ECG recordings (2014)

Liu, Chengyu ; Li, Peng ; Di Maria, Costanzo ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(8): 1665-1683. Published 2014 Jul 29. doi: 10.1088/0967-3334/35/8/1665.

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Crest factor optimization of the multisine waveform for bioimpedance spectroscopy (2014)

Ojarand, Jaan ; Min, Mart ; Annus, Paul

Institute of Physics

In: Physiological Measurement. 2014; 35(6): 1019-1033. Published 2014 May 20. doi: 10.1088/0967-3334/35/6/1019.

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Detection of motion artifact patterns in photoplethysmographic signals based on time and period domain analysis (2014)

Couceiro, R ; Carvalho, P ; Paiva, R P ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(12): 2369-2388. Published 2014 Nov 12. doi: 10.1088/0967-3334/35/12/2369.

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Miniature ambulatory skin conductance monitor and algorithm for investigating hot flash events (2014)

Bahr, Dennis E ; Webster, John G ; Grady, Deborah ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(2): 95-110. Published 2014 Jan 07. doi: 10.1088/0967-3334/35/2/95.

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Assessment of speed distribution of red blood cells in the microvascular network in healthy volunteers and type 1 diabetes using laser Doppler spectra decomposition (2014)

Wojtkiewicz, S ; Wojcik-Sosnowska, E ; Jasik, M ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(2): 283-295. Published 2014 Jan 16. doi: 10.1088/0967-3334/35/2/283.

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A modified algorithm of the combined ensemble empirical mode decomposition and independent component analysis for the removal of cardiac artifacts from neuromuscular electrical signals (2014)

Lee, Kwang Jin ; Choi, Eue Keun ; Lee, Seung Min ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(4): 657-675. Published 2014 Mar 12. doi: 10.1088/0967-3334/35/4/657.

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Improved motion robustness of remote-PPG by using the blood volume pulse signature (2014)

de Haan, G ; van Leest, A

Institute of Physics

In: Physiological Measurement. 2014; 35(9): 1913-1926. Published 2014 Aug 27. doi: 10.1088/0967-3334/35/9/1913.

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Investigating tissue respiration and skin microhaemocirculation under adaptive changes and the synchronization of blood flow and oxygen saturation rhythms (2014)

Dunaev, A V ; Sidorov, V V ; Krupatkin, A I ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(4): 607-621. Published 2014 Mar 12. doi: 10.1088/0967-3334/35/4/607.

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A pilot study of a new spectrophotometry device to measure tissue oxygen saturation (2014)

Abel, Gemma ; Allen, John ; Drinnan, Michael

Institute of Physics

In: Physiological Measurement. 2014; 35(9): 1769-1780. Published 2014 Aug 13. doi: 10.1088/0967-3334/35/9/1769.

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Development of a method for measuring femoral torsion using real-time ultrasound (2014)

Hafiz, Eliza ; Hiller, Claire E ; Nicholson, Leslie L ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(7): 1335-1348. Published 2014 May 22. doi: 10.1088/0967-3334/35/7/1335.

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Experimental evaluation of indoor magnetic distortion effects on gait analysis performed with wearable inertial sensors (2014)

Palermo, E ; Rossi, S ; Patanè, F ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(3): 399-415. Published 2014 Feb 05. doi: 10.1088/0967-3334/35/3/399.

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Pulse wave analysis with two tonometric devices: a comparison study (2014)

Agnoletti, D ; Millasseau, S C ; Topouchian, J ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(9): 1837-1848. Published 2014 Aug 26. doi: 10.1088/0967-3334/35/9/1837.

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Adaptive techniques in electrical impedance tomography reconstruction (2014)

Li, Taoran ; Isaacson, David ; Newell, Jonathan C ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(6): 1111-1124. Published 2014 May 20. doi: 10.1088/0967-3334/35/6/1111.

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Extraction of the fetal ECG in noninvasive recordings by signal decompositions (2014)

Christov, I ; Simova, I ; Abächerli, R

Institute of Physics

In: Physiological Measurement. 2014; 35(8): 1713-1721. Published 2014 Jul 29. doi: 10.1088/0967-3334/35/8/1713.

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Signal shape feature for automatic snore and breathing sounds classification (2014)

Emoto, Takahiro ; Kashihara, Masato ; Abeyratne, Udantha R ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(12): 2489-2499. Published 2014 Nov 17. doi: 10.1088/0967-3334/35/12/2489.

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A statistical index for early diagnosis of ventricular arrhythmia from the trend analysis of ECG phase-portraits (2014)

Cappiello, Grazia ; Das, Saptarshi ; Mazomenos, Evangelos B ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 36(1): 107-131. Published 2014 Dec 12. doi: 10.1088/0967-3334/36/1/107.

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Anterior thigh composition measured using ultrasound imaging to quantify relative thickness of muscle and non-contractile tissue: a potential biomarker for musculoskeletal health (2014)

Agyapong-Badu, Sandra ; Warner, Martin ; Samuel, Dinesh ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(10): 2165-2176. Published 2014 Sep 22. doi: 10.1088/0967-3334/35/10/2165.

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Comparative lower limb hemodynamics using neuromuscular electrical stimulation (NMES) versus intermittent pneumatic compression (IPC) (2014)

Broderick, Barry J ; O’Connell, Sandra ; Moloney, Shelly ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(9): 1849-1859. Published 2014 Aug 26. doi: 10.1088/0967-3334/35/9/1849.

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Magnetic resonance electrical impedance tomography for measuring electrical conductivity during electroporation (2014)

Kranjc, M ; Bajd, F ; Serša, I ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(6): 985-996. Published 2014 May 20. doi: 10.1088/0967-3334/35/6/985.

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Inertia based functional scoring of the shoulder in clinical practice (2014)

Körver, R J P ; Heyligers, I C ; Samijo, S K ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(2): 167-176. Published 2014 Jan 07. doi: 10.1088/0967-3334/35/2/167.

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Choice of reconstructed tissue properties affects interpretation of lung EIT images (2014)

Grychtol, Bartłomiej ; Adler, Andy

Institute of Physics

In: Physiological Measurement. 2014; 35(6): 1035-1050. Published 2014 May 20. doi: 10.1088/0967-3334/35/6/1035.

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Selecting the optimal anti-aliasing filter for multichannel biosignal acquisition intended for inter-signal phase shift analysis (2014)

Keresnyei, Róbert ; Megyeri, Péter ; Zidarics, Zoltán ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 36(1): N23-N34. Published 2014 Dec 16. doi: 10.1088/0967-3334/36/1/n23.

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Multifrequency right-side, localized and segmental BIA obtained with different bioimpedance analysers (2014)

Bogónez-Franco, P ; Nescolarde, L ; McAdams, E ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 36(1): 85-106. Published 2014 Dec 12. doi: 10.1088/0967-3334/36/1/85.

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Performance limits of ICA-based heart rate identification techniques in imaging photoplethysmography (2014)

Mannapperuma, Kavan ; Holton, Benjamin D ; Lesniewski, Peter J ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 36(1): 67-83. Published 2014 Dec 12. doi: 10.1088/0967-3334/36/1/67.

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Measurement of regional forearm muscle haemodynamics via the near-infrared spectroscopy venous occlusion technique: the impact of hand circulatory occlusion (2014)

Cross, T J ; van Beekvelt, M ; Constantini, K ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(12): 2563-2573. Published 2014 Nov 24. doi: 10.1088/0967-3334/35/12/2563.

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Brainstem auditory and somatosensory evoked potentials: a methodological study to evaluate the reproducibility of two devices (2014)

Moncho, D ; Poca, M A ; Minoves, T ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(12): N51-N63. Published 2014 Nov 24. doi: 10.1088/0967-3334/35/12/n51.

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On estimating the directionality distribution in pedicle trabecular bone from micro-CT images (2014)

Gdyczynski, Catherine M ; Manbachi, Amir ; Hashemi, SayedMasoud ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(12): 2415-2428. Published 2014 Nov 12. doi: 10.1088/0967-3334/35/12/2415.

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66

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A combined segmenting and non-segmenting approach to signal quality estimation for ambulatory photoplethysmography (2014)

Wander, J D ; Morris, D

Institute of Physics

In: Physiological Measurement. 2014; 35(12): 2543-2561. Published 2014 Nov 19. doi: 10.1088/0967-3334/35/12/2543.

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A feasibility study to determine the potential ofin vivodetection of gadolinium by x-ray fluorescence (XRF) following gadolinium-based contrast-enhanced MRI (2014)

Mostafaei, F ; McNeill, F E ; Chettle, D R ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 36(1): N1-N13. Published 2014 Dec 11. doi: 10.1088/0967-3334/36/1/n1.

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Corrigendum: Brainstem auditory and somatosensory evoked potentials: a methodological study to evaluate the reproducibility of two devices (2014 Physiol. Meas. 35 N51–63) (2014)

Moncho, D ; Poca, M A ; Minoves, T ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 36(1): 177-177. Published 2014 Dec 17. doi: 10.1088/0967-3334/36/1/177.

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Evaluation of muscular activity duration in shoulders with rotator cuff tears using inertial sensors and electromyography (2014)

Duc, Cyntia ; Pichonnaz, Claude ; Bassin, Jean-Philippe ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(12): 2389-2400. Published 2014 Nov 12. doi: 10.1088/0967-3334/35/12/2389.

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Synchronized imaging and acoustic analysis of the upper airway in patients with sleep-disordered breathing (2014)

Chang, Yi-Chung ; Huon, Leh-Kiong ; Pham, Van-Truong ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(12): 2501-2512. Published 2014 Nov 17. doi: 10.1088/0967-3334/35/12/2501.

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Publikationsdatum: 2014-11-17

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Multiresolution analysis of pathological changes in cerebral venous dynamics in newborn mice with intracranial hemorrhage: adrenorelated vasorelaxation (2014)

Pavlov, A N ; Semyachkina-Glushkovskaya, O V ; Zhang, Y ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(10): 1983-1999. Published 2014 Sep 19. doi: 10.1088/0967-3334/35/10/1983.

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Publikationsdatum: 2014-09-19

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Martin Black award for the best paper published in 2013 (2014)

Moorman, Randall ; Ruffle, Jon

Institute of Physics

In: Physiological Measurement. 2014; 35(10): 1927-1928. Published 2014 Sep 17. doi: 10.1088/0967-3334/35/10/1927.

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Investigation of photoplethysmographs from the anterior fontanelle of neonates (2014)

May, J M ; Kyriacou, P A ; Honsel, M ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(10): 1961-1973. Published 2014 Sep 17. doi: 10.1088/0967-3334/35/10/1961.

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Comparison of two accelerometer filter settings in individuals with Parkinson’s disease (2014)

Wallén, Martin Benka ; Nero, Håkan ; Franzén, Erika ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(11): 2287-2296. Published 2014 Oct 23. doi: 10.1088/0967-3334/35/11/2287.

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Publikationsdatum: 2014-10-23

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Water-displacement plethysmography: a technique for the simultaneous thermal manipulation and measurement of whole-hand and whole-foot blood flows (2014)

Caldwell, Joanne N ; Taylor, Nigel A S

Institute of Physics

In: Physiological Measurement. 2014; 35(9): 1781-1795. Published 2014 Aug 13. doi: 10.1088/0967-3334/35/9/1781.

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Publikationsdatum: 2014-08-13

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Corrigendum: Reliability and consistency of plantarflexor stretch-shortening cycle function using an adapted force sledge apparatus (2013 Physiological Measurement 34 437) (2014)

Furlong, Laura-Anne M ; Harrison, Andrew J

Institute of Physics

In: Physiological Measurement. 2014; 35(10): 2177-2177. Published 2014 Sep 22. doi: 10.1088/0967-3334/35/10/2177.

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Publikationsdatum: 2014-09-22

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A compact DD neutron generator–based NAA system to quantify manganese (Mn) in bonein vivo (2014)

Liu, Yingzi ; Byrne, Patrick ; Wang, Haoyu ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(9): 1899-1911. Published 2014 Aug 26. doi: 10.1088/0967-3334/35/9/1899.

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Publikationsdatum: 2014-08-26

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Principal component model for maternal ECG extraction in fetal QRS detection (2014)

Lipponen, Jukka A ; Tarvainen, Mika P

Institute of Physics

In: Physiological Measurement. 2014; 35(8): 1637-1648. Published 2014 Jul 29. doi: 10.1088/0967-3334/35/8/1637.

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Publikationsdatum: 2014-07-29

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Estimation of skin conductance at low frequencies using measurements at higher frequencies for EDA applications (2014)

Nordbotten, Bernt J ; Tronstad, Christian ; Martinsen, Ørjan G ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(6): 1011-1018. Published 2014 May 20. doi: 10.1088/0967-3334/35/6/1011.

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Publikationsdatum: 2014-05-20

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A wireless platform forin vivomeasurement of resistance properties of the gastrointestinal tract (2014)

Natali, C Di ; Beccani, M ; Obstein, K L ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(7): 1197-1214. Published 2014 May 22. doi: 10.1088/0967-3334/35/7/1197.

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Publikationsdatum: 2014-05-22

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XVth International Conference on Electrical Bio-Impedance and the XIVth Conference on Electrical Impedance Tomography (Heilbad Heiligenstadt, Germany, 22–25 April 2013) (2014)

Bayford, Richard ; Pliquett, Uwe

Institute of Physics

In: Physiological Measurement. 2014; 35(6): 915-916. Published 2014 May 20. doi: 10.1088/0967-3334/35/6/915.

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A small-size transfer blackbody cavity for calibration of infrared ear thermometers (2014)

Kim, Gen Jung ; Yoo, Yong Shim ; Kim, Bong Hak ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(5): 753-762. Published 2014 Mar 26. doi: 10.1088/0967-3334/35/5/753.

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Publikationsdatum: 2014-03-26

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Trackability evaluation of reconstruction algorithms to the change of measured objects in electrical tomography (2014)

Wang, Chao ; He, Xiaorong ; Bai, Ruifeng

Institute of Physics

In: Physiological Measurement. 2014; 35(4): 583-596. Published 2014 Mar 12. doi: 10.1088/0967-3334/35/4/583.

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Comparison of minimum-norm estimation and beamforming in electrocardiography with acute ischemia (2014)

Konttila, Teijo ; Mäntynen, Ville ; Stenroos, Matti

Institute of Physics

In: Physiological Measurement. 2014; 35(4): 623-638. Published 2014 Mar 12. doi: 10.1088/0967-3334/35/4/623.

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The effect of endotoxin on the controllability of cardiac rhythm in rats (2014)

Mazloom, Roham ; Shirazi, Amir H ; Hajizadeh, Sohrab ; [weitere]

Institute of Physics

In: Physiological Measurement. 2014; 35(3): 339-349. Published 2014 Jan 30. doi: 10.1088/0967-3334/35/3/339.

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Publikationsdatum: 2014-01-30

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Dose in x-ray computed tomography (2014)

Kalender, Willi A

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(3): R129-R150. Published 2014 Jan 17. doi: 10.1088/0031-9155/59/3/r129.

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Publikationsdatum: 2014-01-17

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Thema: Biologie , Medizin , Physik

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Assessment and improvements of Geant4 hadronic models in the context of prompt-gamma hadrontherapy monitoring (2014)

Dedes, G ; Pinto, M ; Dauvergne, D ; [weitere]

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(7): 1747-1772. Published 2014 Mar 12. doi: 10.1088/0031-9155/59/7/1747.

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Simulations of dose enhancement for heavy atom nanoparticles irradiated by protons (2014)

Wälzlein, C ; Scifoni, E ; Krämer, M ; [weitere]

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(6): 1441-1458. Published 2014 Feb 28. doi: 10.1088/0031-9155/59/6/1441.

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Real-timein vivorectal wall dosimetry using plastic scintillation detectors for patients with prostate cancer (2014)

Wootton, Landon ; Kudchadker, Rajat ; Lee, Andrew ; [weitere]

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(3): 647-660. Published 2014 Jan 17. doi: 10.1088/0031-9155/59/3/647.

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An exponential growth of computational phantom research in radiation protection, imaging, and radiotherapy: a review of the fifty-year history (2014)

Xu, X George

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(18): R233-R302. Published 2014 Aug 21. doi: 10.1088/0031-9155/59/18/r233.

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Predicting the electric field distribution in the brain for the treatment of glioblastoma (2014)

Miranda, Pedro C ; Mekonnen, Abeye ; Salvador, Ricardo ; [weitere]

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(15): 4137-4147. Published 2014 Jul 08. doi: 10.1088/0031-9155/59/15/4137.

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Anisotropic polyvinyl alcohol hydrogel phantom for shear wave elastography in fibrous biological soft tissue: a multimodality characterization (2014)

Chatelin, Simon ; Bernal, Miguel ; Deffieux, Thomas ; [weitere]

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(22): 6923-6940. Published 2014 Oct 28. doi: 10.1088/0031-9155/59/22/6923.

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A unifying probabilistic Bayesian approach to derive electron density from MRI for radiation therapy treatment planning (2014)

Gudur, Madhu Sudhan Reddy ; Hara, Wendy ; Le, Quynh-Thu ; [weitere]

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(21): 6595-6606. Published 2014 Oct 16. doi: 10.1088/0031-9155/59/21/6595.

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Publikationsdatum: 2014-10-16

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GPU-based high-performance computing for radiation therapy (2014)

Jia, Xun ; Ziegenhein, Peter ; Jiang, Steve B

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(4): R151-R182. Published 2014 Feb 03. doi: 10.1088/0031-9155/59/4/r151.

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Measurement of the dielectric properties of the epidermis and dermis at frequencies from 0.5 GHz to 110 GHz (2014)

Sasaki, K ; Wake, K ; Watanabe, S

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(16): 4739-4747. Published 2014 Aug 01. doi: 10.1088/0031-9155/59/16/4739.

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Search for novel contrast materials in dual-energy x-ray breast imaging using theoretical modeling of contrast-to-noise ratio (2014)

Karunamuni, R ; Maidment, A D A

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(15): 4311-4324. Published 2014 Jul 16. doi: 10.1088/0031-9155/59/15/4311.

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Optical dosimetry of radiotherapy beams using Cherenkov radiation: the relationship between light emission and dose (2014)

Glaser, Adam K ; Zhang, Rongxiao ; Gladstone, David J ; [weitere]

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(14): 3789-3811. Published 2014 Jun 18. doi: 10.1088/0031-9155/59/14/3789.

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Average absorption cross-section of the human body measured at 1–12 GHz in a reverberant chamber: results of a human volunteer study (2014)

Flintoft, I D ; Robinson, M P ; Melia, G C R ; [weitere]

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(13): 3297-3317. Published 2014 May 29. doi: 10.1088/0031-9155/59/13/3297.

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99

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Multi-parametric monitoring and assessment of high-intensity focused ultrasound (HIFU) boiling by harmonic motion imaging for focused ultrasound (HMIFU): anex vivofeasibility study (2014)

Hou, Gary Y ; Marquet, Fabrice ; Wang, Shutao ; [weitere]

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(5): 1121-1145. Published 2014 Feb 20. doi: 10.1088/0031-9155/59/5/1121.

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4D image reconstruction for emission tomography (2014)

Reader, Andrew J ; Verhaeghe, Jeroen

Institute of Physics

In: Physics in Medicine and Biology. 2014; 59(22): R371-R418. Published 2014 Oct 31. doi: 10.1088/0031-9155/59/22/r371.

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Publikationsdatum: 2014-10-31

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