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Measurements of Urban, Marine and Biogenic Air (MUMBA): characterisation of trace gases and aerosol at the urban, marine and biogenic interface in summer in Wollongong, Australia (2017)

Guérette, Elise-Andrée ; Paton-Walsh, Clare ; Kubistin, Dagmar ; [weitere]

PANGAEA

In: Supplement to: Paton-Walsh, Clare; Guérette, Elise-Andrée; Kubistin, Dagmar; Humphries, Ruhi S; Wilson, Stephen R; Dominick, Doreena; Galbally, Ian; Buchholz, Rebecca R; Bhujel, Mahendra; Chambers, Scott D; Cheng, Min; Cope, Martin; Davy, Perry; Emmerson, Kathryn M; Griffith, David W T; Griffiths, Alan D; Keywood, Melita D; Lawson, Sarah; Molloy, Suzie; Rea, Geraldine; Selleck, Paul; Shi, Xue; Simmons, Jack B; Velazco, Voltaire (2017): The MUMBA Campaign: Measurements of Urban, Marine and Biogenic Air. Earth System Science Data, 9(1), 349-362, https://doi.org/10.5194/essd-9-349-2017

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Publikationsdatum: 2023-01-13

Beschreibung: The Measurements of Urban, Marine and Biogenic Air (MUMBA) campaign took place in Wollongong, New South Wales (a small coastal city approximately 80 km south of Sydney, Australia), from 21st December 2012 to 15th February 2013. Instruments were deployed during MUMBA to measure the gaseous and aerosol composition of the atmosphere with the aim of providing a detailed characterisation of the complex environment of the ocean/forest/urban interface that could be used to test the skill of atmospheric models. Gases measured included ozone, oxides of nitrogen, carbon monoxide, carbon dioxide, methane and many of the most abundant volatile organic compounds. Aerosol characterisation included total particle counts above 3 nm, total cloud condensation nuclei counts; mass concentration of PM2.5, number concentration size distribution, aerosol chemical analyses and elemental analysis. Meteorological measurements and LIDAR measurements were also performed. The campaign captured varied meteorological conditions, including two extreme heat events, providing a potentially valuable test for models of future air quality in a warmer climate. There was also an episode when the site sampled clean marine air for many hours, providing a useful additional measure of background concentrations of these trace gases within this poorly sampled region of the globe. Here we present the observations recorded at the MUMBA site during the campaign, as well as radon and air quality data from nearby sites. These records can be used for testing chemical transport models.

Materialart: Dataset

Format: application/zip, 17 datasets

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Roosevelt Island Climate Evolution (RICE) ice core isotope record (2017)

Bertler, Nancy A ; Conway, Howard ; Dahl-Jensen, Dorthe ; [weitere]

PANGAEA

In: Supplement to: Bertler, Nancy A; Conway, Howard; Dahl-Jensen, Dorthe; Emanuelsson, Urban; Winstrup, Mai; Vallelonga, Paul T; Lee, James E; Brook, Edward J; Severinghaus, Jeffrey P; Fudge, Tyler J; Keller, Elizabeth D; Baisden, W Troy; Hindmarsh, Richard C A; Neff, Peter D; Blunier, Thomas; Edwards, Ross L; Mayewski, Paul Andrew; Kipfstuhl, Sepp; Buizert, Christo; Canessa, Silvia; Dadic, Ruzica; Kjær, Helle Astrid; Kurbatov, Andrei; Zhang, Dongqi; Waddington, Edwin D; Baccolo, Giovanni; Beers, Thomas; Brightley, Hannah J; Carter, Lionel; Clemens-Sewall, David; Ciobanu, Viorela G; Delmonte, Barbara; Eling, Lukas; Ellis, Aja A; Ganesh, Shruthi; Golledge, Nicholas R; Haines, Skylar A; Handley, Michael; Hawley, Robert L; Hogan, Chad M; Johnson, Katelyn M; Korotkikh, Elena; Lowry, Daniel P; Mandeno, Darcy; McKay, Robert M; Menking, James A; Naish, Timothy R; Noerling, Caroline; Ollive, Agathe; Orsi, Anais J; Proemse, Bernadette C; Pyne, Alexander R; Pyne, Rebecca L; Renwick, James; Scherer, Reed P; Semper, Stefanie; Simonsen, Marius; Sneed, Sharon B; Steig, Eric J; Tuohy, Andrea; Ulayottil Venugopal, Abhijith; Valero Delgado, Fernando; Venkatesh, Janani; Wang, Feitang; Wang, Shimeng; Winski, Dominic A; Winton, Victoria H L; Whiteford, Arran; Xiao, Cunde; Yang, Jiao; Zhang, Xin (2018): The Ross Sea dipole - temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years. Climate of the Past, 14, 193-214, https://doi.org/10.5194/cp-14-193-2018

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Publikationsdatum: 2024-03-18

Beschreibung: High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the eastern Ross Sea. Comparison of the Roosevelt Island Climate Evolution (RICE) ice core records with climate reanalysis data for the 1979-2012 calibration period shows that RICE records reliably capture temperature and snow precipitation variability of the region. RICE is compared with data from West Antarctica (West Antarctic Ice Sheet Divide Ice Core) and the western (Talos Dome) and eastern (Siple Dome) Ross Sea. For most of the past 2,700 years, the eastern Ross Sea was warming with perhaps increased snow accumulation and decreased sea ice extent. However, West Antarctica cooled whereas the western Ross Sea showed no significant temperature trend. From the 17th Century onwards, this relationship changes. All three regions now show signs of warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea, but increasing in the western Ross Sea. Analysis of decadal to centennial-scale climate variability superimposed on the longer term trend reveal that periods characterised by opposing temperature trends between the Eastern and Western Ross Sea have occurred since the 3rd Century but are masked by longer-term trends. This pattern here is referred to as the Ross Sea Dipole, caused by a sensitive response of the region to dynamic interactions of the Southern Annual Mode and tropical forcings.

Schlagwort(e): AGE; Age, maximum/old; Age, minimum/young; DEPTH, ice/snow; ICEDRILL; Ice drill; Isotope ratio mass spectrometry; RICE; Roosevelt Island, Antarctica; δ Deuterium

Materialart: Dataset

Format: text/tab-separated-values, 8136 data points

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Drift waves, intense parallel electric fields, and turbulence associated with asymmetric magnetic reconnection at the magnetopause (2017)

Ergun, R. E. ; Chen, L.-J. ; Wilder, F. D. ; [weitere]

American Geophysical Union

In: Geophysical Research Letters. 2017; 44(7): 2978-2986. Published 2017 Apr 09. doi: 10.1002/2016gl072493.

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Publikationsdatum: 2017-04-09

Beschreibung: Observations of magnetic reconnection at Earth's magnetopause often display asymmetric structures that are accompanied by strong magnetic field (B) fluctuations and large-amplitude parallel electric fields (E||). The B turbulence is most intense at frequencies above the ion cyclotron frequency and below the lower hybrid frequency. The B fluctuations are consistent with a thin, oscillating current sheet that is corrugated along the electron flow direction (along the X line), which is a type of electromagnetic drift wave. Near the X line, electron flow is primarily due to a Hall electric field, which diverts ion flow in asymmetric reconnection and accompanies the instability. Importantly, the drift waves appear to drive strong parallel currents which, in turn, generate large-amplitude (~100 mV/m) E|| in the form of nonlinear waves and structures. These observations suggest that turbulence may be common in asymmetric reconnection, penetrate into the electron diffusion region, and possibly influence the magnetic reconnection process. ©2017. American Geophysical Union. All Rights Reserved.

Print ISSN: 0094-8276

Digitale ISSN: 1944-8007

Thema: Geologie und Paläontologie , Physik

Publiziert von American Geophysical Union

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Lower Hybrid Drift Waves and Electromagnetic Electron Space-Phase Holes Associated With Dipolarization Fronts and Field-Aligned Currents Observed by the Magnetospheric Multiscale Mission During a Substorm (2017)

Le Contel, O. ; Nakamura, R. ; Breuillard, H. ; [weitere]

American Geophysical Union

In: Journal of Geophysical Research: Space Physics. 2017; 122(12): 12,236-12,257. Published 2017 Dec 01. doi: 10.1002/2017ja024550.

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Publikationsdatum: 2017-12-01

Print ISSN: 2169-9380

Digitale ISSN: 2169-9402

Thema: Geologie und Paläontologie , Physik

Publiziert von American Geophysical Union

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Observation and interpretation of energetic ion conics in Jupiter's polar magnetosphere (2017)

Clark, G. ; Mauk, B. H. ; Paranicas, C. ; [weitere]

American Geophysical Union

In: Geophysical Research Letters. 2017; 44(10): 4419-4425. Published 2017 May 25. doi: 10.1002/2016gl072325.

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Publikationsdatum: 2017-05-25

Beschreibung: NASA's Juno spacecraft successfully completed its first science polar pass over Jupiter's northern and southern aurora, with all the instruments powered, on 27 August 2016. Observations of conical energetic proton distributions at low altitudes (〈6 RJ) over the northern polar region are interpreted as resulting from transversely (to the local magnetic field lines) accelerated H+ at a position planetward of the point of observation. The proton conics were observed within a broad region of upward beaming electrons and were accompanied by broadband low-frequency wave emissions as well as low-altitude trapped magnetospheric protons and heavy ions. The characteristic energies associated with these accelerated ion conics are ~100 times more energetic than similar distributions observed in the Earth's auroral region and similar in energy to those found at Saturn. In addition, the ion conics also exhibited pitch angle dispersion with time that is interpreted as a consequence of the structure of the source location. Mapping these distributions along magnetic field lines connected from the spacecraft to the ionosphere suggests that the source region exists at altitudes between ~3 and 5 RJ. These new and exciting observations of accelerated ions over the polar region of Jupiter open up new areas for comparative planetary auroral physics. ©2017. The Authors.

Print ISSN: 0094-8276

Digitale ISSN: 1944-8007

Thema: Geologie und Paläontologie , Physik

Publiziert von American Geophysical Union

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Chemistry, mineralogy, and grain properties at Namib and High dunes, Bagnold dune field, Gale crater, Mars: A synthesis of Curiosity rover observations (2017)

Ehlmann, B. L. ; Edgett, K. S. ; Sutter, B. ; [weitere]

American Geophysical Union

In: Journal of Geophysical Research: Planets. 2017; 122(12): 2510-2543. Published 2017 Dec 01. doi: 10.1002/2017je005267.

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Publikationsdatum: 2017-12-01

Print ISSN: 2169-9097

Digitale ISSN: 2169-9100

Thema: Geologie und Paläontologie , Physik

Publiziert von American Geophysical Union

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Mineralogy of an active eolian sediment from the Namib dune, Gale crater, Mars (2017)

Achilles, C. N. ; Downs, R. T. ; Ming, D. W. ; [weitere]

American Geophysical Union

In: Journal of Geophysical Research: Planets. 2017; 122(11): 2344-2361. Published 2017 Nov 01. doi: 10.1002/2017je005262.

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Publikationsdatum: 2017-11-01

Print ISSN: 2169-9097

Digitale ISSN: 2169-9100

Thema: Geologie und Paläontologie , Physik

Publiziert von American Geophysical Union

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The nonlinear behavior of whistler waves at the reconnecting dayside magnetopause as observed by the Magnetospheric Multiscale mission: A case study (2017)

Wilder, F. D. ; Ergun, R. E. ; Newman, D. L. ; [weitere]

American Geophysical Union

In: Journal of Geophysical Research: Space Physics. 2017; 122(5): 5487-5501. Published 2017 May 01. doi: 10.1002/2017ja024062.

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Publikationsdatum: 2017-05-01

Print ISSN: 2169-9380

Digitale ISSN: 2169-9402

Thema: Geologie und Paläontologie , Physik

Publiziert von American Geophysical Union

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Interplanetary coronal mass ejection observed at STEREO-A, Mars, comet 67P/Churyumov-Gerasimenko, Saturn, and New Horizons en route to Pluto: Comparison of its Forbush decreases at 1.4, 3.1, and 9.9 AU (2017)

Witasse, O. ; Sánchez-Cano, B. ; Mays, M. L. ; [weitere]

American Geophysical Union

In: Journal of Geophysical Research: Space Physics. 2017; 122(8): 7865-7890. Published 2017 Aug 01. doi: 10.1002/2017ja023884.

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Publikationsdatum: 2017-08-01

Print ISSN: 2169-9380

Digitale ISSN: 2169-9402

Thema: Geologie und Paläontologie , Physik

Publiziert von American Geophysical Union

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Community metabolism in shallow coral reef and seagrass ecosystems, lower Florida Keys (2017)

Yates, Kimberly Kaye ; Turk, D ; Vega-Rodriguez, M ; [weitere]

PANGAEA

In: Supplement to: Turk, D; Yates, Kimberly Kaye; Vega-Rodriguez, M; Toro-Farmer, G; L'Esperance, Chris; Melo, N; Ramsewak, D; Dowd, M; Cerdeira Estrada, S; Muller-Karger, Frank E; Herwitz, SR; McGillis, W R (2015): Community metabolism in shallow coral reef and seagrass ecosystems, lower Florida Keys. Marine Ecology Progress Series, 538, 35-52, https://doi.org/10.3354/meps11385

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Publikationsdatum: 2023-05-12

Beschreibung: Diurnal variation of net community production (NEP) and net community calcification (NEC) were measured in coral reef and seagrass biomes during October 2012 in the lower Florida Keys using a mesocosm enclosure and the oxygen gradient flux technique. Seagrass and coral reef sites showed diurnal variations of NEP and NEC, with positive values at near-seafloor light levels 〉100-300 µEinstein/m**2/s. During daylight hours, we detected an average NEP of 12.3 and 8.6 mmol O2/m**2/h at the seagrass and coral reef site, respectively. At night, NEP at the seagrass site was relatively constant, while on the coral reef, net respiration was highest immediately after dusk and decreased during the rest of the night. At the seagrass site, NEC values ranged from 0.20 g CaCO3 /m**2/h during daylight to -0.15 g CaCO3/m**2/h at night, and from 0.17 to -0.10 g CaCO3/m**2/h at the coral reef site. There were no significant differences in pH and aragonite saturation states (Omega ar) between the seagrass and coral reef sites. Decrease in light levels during thunderstorms significantly decreased NEP, transforming the system from net autotrophic to net heterotrophic.

Schlagwort(e): North Atlantic

Materialart: Dataset

Format: application/zip, 3 datasets

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