ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Permafrost carbon as a missing link to explain CO2 changes during the last deglaciation (2016)
    Springer Nature
    Details
    Publication Date: 2016-09-02
    Description: Nature Geoscience 9, 683 (2016). doi:10.1038/ngeo2793 Authors: K. A. Crichton, N. Bouttes, D. M. Roche, J. Chappellaz & G. Krinner The atmospheric concentration of CO2 increased from 190 to 280 ppm between the last glacial maximum 21,000 years ago and the pre-industrial era. This CO2 rise and its timing have been linked to changes in the Earth’s orbit, ice sheet configuration and volume, and ocean carbon storage. The ice-core record of δ13CO2 (refs ,) in the atmosphere can help to constrain the source of carbon, but previous modelling studies have failed to capture the evolution of δ13CO2 over this period. Here we show that simulations of the last deglaciation that include a permafrost carbon component can reproduce the ice core records between 21,000 and 10,000 years ago. We suggest that thawing permafrost, due to increasing summer insolation in the northern hemisphere, is the main source of CO2 rise between 17,500 and 15,000 years ago, a period sometimes referred to as the Mystery Interval. Together with a fresh water release into the North Atlantic, much of the CO2 variability associated with the Bølling-Allerod/Younger Dryas period ∼15,000 to ∼12,000 years ago can also be explained. In simulations of future warming we find that the permafrost carbon feedback increases global mean temperature by 10–40% relative to simulations without this feedback, with the magnitude of the increase dependent on the evolution of anthropogenic carbon emissions.
    Print ISSN: 1752-0894
    Electronic ISSN: 1752-0908
    Topics: Geosciences
    Published by Springer Nature
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    facet.materialart.
    Unknown
    Two-phase change in CO2, Antarctic temperature and global climate during Termination II (2013)
    Springer Nature
    Details
    Publication Date: 2013-11-29
    Description: Nature Geoscience 6, 1062 (2013). doi:10.1038/ngeo1985 Authors: A. Landais, G. Dreyfus, E. Capron, J. Jouzel, V. Masson-Delmotte, D. M. Roche, F. Prié, N. Caillon, J. Chappellaz, M. Leuenberger, A. Lourantou, F. Parrenin, D. Raynaud & G. Teste
    Print ISSN: 1752-0894
    Electronic ISSN: 1752-0908
    Topics: Geosciences
    Published by Springer Nature
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 3
    facet.materialart.
    Unknown
    Relative timing of deglacial climate events in Antarctica and Greenland (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-09-14
    Description: The last deglaciation was marked by large, hemispheric, millennial-scale climate variations: the Bolling-Allerod and Younger Dryas periods in the north, and the Antarctic Cold Reversal in the south. A chronology from the high-accumulation Law Dome East Antarctic ice core constrains the relative timing of these two events and provides strong evidence that the cooling at the start of the Antarctic Cold Reversal did not follow the abrupt warming during the northern Bolling transition around 14,500 years ago. This result suggests that southern changes are not a direct response to abrupt changes in North Atlantic thermohaline circulation, as is assumed in the conventional picture of a hemispheric temperature seesaw.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Morgan, Vin -- Delmotte, Marc -- van Ommen, Tas -- Jouzel, Jean -- Chappellaz, Jerome -- Woon, Suenor -- Masson-Delmotte, Valerie -- Raynaud, Dominique -- New York, N.Y. -- Science. 2002 Sep 13;297(5588):1862-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Antarctic Cooperative Research Centre and Australian Antarctic Division, GPO Box 252-80, Hobart, Tasmania, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12228715" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 4
    facet.materialart.
    Unknown
    Orbital and millennial-scale features of atmospheric CH4 over the past 800,000 years (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-05-16
    Description: Atmospheric methane is an important greenhouse gas and a sensitive indicator of climate change and millennial-scale temperature variability. Its concentrations over the past 650,000 years have varied between approximately 350 and approximately 800 parts per 10(9) by volume (p.p.b.v.) during glacial and interglacial periods, respectively. In comparison, present-day methane levels of approximately 1,770 p.p.b.v. have been reported. Insights into the external forcing factors and internal feedbacks controlling atmospheric methane are essential for predicting the methane budget in a warmer world. Here we present a detailed atmospheric methane record from the EPICA Dome C ice core that extends the history of this greenhouse gas to 800,000 yr before present. The average time resolution of the new data is approximately 380 yr and permits the identification of orbital and millennial-scale features. Spectral analyses indicate that the long-term variability in atmospheric methane levels is dominated by approximately 100,000 yr glacial-interglacial cycles up to approximately 400,000 yr ago with an increasing contribution of the precessional component during the four more recent climatic cycles. We suggest that changes in the strength of tropical methane sources and sinks (wetlands, atmospheric oxidation), possibly influenced by changes in monsoon systems and the position of the intertropical convergence zone, controlled the atmospheric methane budget, with an additional source input during major terminations as the retreat of the northern ice sheet allowed higher methane emissions from extending periglacial wetlands. Millennial-scale changes in methane levels identified in our record as being associated with Antarctic isotope maxima events are indicative of ubiquitous millennial-scale temperature variability during the past eight glacial cycles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Loulergue, Laetitia -- Schilt, Adrian -- Spahni, Renato -- Masson-Delmotte, Valerie -- Blunier, Thomas -- Lemieux, Benedicte -- Barnola, Jean-Marc -- Raynaud, Dominique -- Stocker, Thomas F -- Chappellaz, Jerome -- England -- Nature. 2008 May 15;453(7193):383-6. doi: 10.1038/nature06950.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Glaciologie et Geophysique de l'Environnement, CNRS-Universite Joseph Fourier Grenoble, 54 Rue Moliere, 38402 St Martin d'Heres, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18480822" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere/*chemistry ; Greenhouse Effect ; History, Ancient ; Ice Cover ; Methane/*analysis ; Temperature ; Time Factors ; Tropical Climate ; Wetlands
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    Changing boreal methane sources and constant biomass burning during the last termination (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-04-19
    Description: Past atmospheric methane concentrations show strong fluctuations in parallel to rapid glacial climate changes in the Northern Hemisphere superimposed on a glacial-interglacial doubling of methane concentrations. The processes driving the observed fluctuations remain uncertain but can be constrained using methane isotopic information from ice cores. Here we present an ice core record of carbon isotopic ratios in methane over the entire last glacial-interglacial transition. Our data show that the carbon in atmospheric methane was isotopically much heavier in cold climate periods. With the help of a box model constrained by the present data and previously published results, we are able to estimate the magnitude of past individual methane emission sources and the atmospheric lifetime of methane. We find that methane emissions due to biomass burning were about 45 Tg methane per year, and that these remained roughly constant throughout the glacial termination. The atmospheric lifetime of methane is reduced during cold climate periods. We also show that boreal wetlands are an important source of methane during warm events, but their methane emissions are essentially shut down during cold climate conditions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fischer, Hubertus -- Behrens, Melanie -- Bock, Michael -- Richter, Ulrike -- Schmitt, Jochen -- Loulergue, Laetitia -- Chappellaz, Jerome -- Spahni, Renato -- Blunier, Thomas -- Leuenberger, Markus -- Stocker, Thomas F -- England -- Nature. 2008 Apr 17;452(7189):864-7. doi: 10.1038/nature06825.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Alfred Wegener Institute for Polar and Marine Research, Columbusstrasse, 27568 Bremerhaven, Germany. hubertus.fischer@awi.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18421351" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere/chemistry ; *Biomass ; Carbon/analysis ; Carbon Isotopes ; Cold Climate ; Fires/*statistics & numerical data ; Greenland ; History, Ancient ; Hydrogen/analysis ; *Ice Cover ; Methane/*analysis/*chemistry/metabolism ; Monte Carlo Method ; *Temperature ; Trees/*metabolism ; Wetlands
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Orbital and millennial Antarctic climate variability over the past 800,000 years (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-07-07
    Description: A high-resolution deuterium profile is now available along the entire European Project for Ice Coring in Antarctica Dome C ice core, extending this climate record back to marine isotope stage 20.2, approximately 800,000 years ago. Experiments performed with an atmospheric general circulation model including water isotopes support its temperature interpretation. We assessed the general correspondence between Dansgaard-Oeschger events and their smoothed Antarctic counterparts for this Dome C record, which reveals the presence of such features with similar amplitudes during previous glacial periods. We suggest that the interplay between obliquity and precession accounts for the variable intensity of interglacial periods in ice core records.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jouzel, J -- Masson-Delmotte, V -- Cattani, O -- Dreyfus, G -- Falourd, S -- Hoffmann, G -- Minster, B -- Nouet, J -- Barnola, J M -- Chappellaz, J -- Fischer, H -- Gallet, J C -- Johnsen, S -- Leuenberger, M -- Loulergue, L -- Luethi, D -- Oerter, H -- Parrenin, F -- Raisbeck, G -- Raynaud, D -- Schilt, A -- Schwander, J -- Selmo, E -- Souchez, R -- Spahni, R -- Stauffer, B -- Steffensen, J P -- Stenni, B -- Stocker, T F -- Tison, J L -- Werner, M -- Wolff, E W -- New York, N.Y. -- Science. 2007 Aug 10;317(5839):793-6. Epub 2007 Jul 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire des Sciences du Climat et l'Environnement, Institut Pierre Simon Laplace, CEA-CNRS-Universite de Versailles Saint-Quentin en Yvelines, CE Saclay, Gif-sur-Yvette, France. jean.jouzel@lsce.ipsl.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17615306" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    Large variations in Southern Hemisphere biomass burning during the last 650 years (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-04
    Description: We present a 650-year Antarctic ice core record of concentration and isotopic ratios (delta(13)C and delta(18)O) of atmospheric carbon monoxide. Concentrations decreased by ~25% (14 parts per billion by volume) from the mid-1300s to the 1600s then recovered completely by the late 1800s. delta(13)C and delta(18)O decreased by about 2 and 4 per mil ( per thousand), respectively, from the mid-1300s to the 1600s then increased by about 2.5 and 4 per thousand by the late 1800s. These observations and isotope mass balance model results imply that large variations in the degree of biomass burning in the Southern Hemisphere occurred during the last 650 years, with a decrease by about 50% in the 1600s, an increase of about 100% by the late 1800s, and another decrease by about 70% from the late 1800s to present day.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Z -- Chappellaz, J -- Park, K -- Mak, J E -- New York, N.Y. -- Science. 2010 Dec 17;330(6011):1663-6. doi: 10.1126/science.1197257. Epub 2010 Dec 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Terrestrial and Planetary Atmospheres/School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794-5000, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21127215" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    Atmospheric methane and nitrous oxide of the Late Pleistocene from Antarctic ice cores (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-11-29
    Description: The European Project for Ice Coring in Antarctica Dome C ice core enables us to extend existing records of atmospheric methane (CH4) and nitrous oxide (N2O) back to 650,000 years before the present. A combined record of CH4 measured along the Dome C and the Vostok ice cores demonstrates, within the resolution of our measurements, that preindustrial concentrations over Antarctica have not exceeded 773 +/- 15 ppbv (parts per billion by volume) during the past 650,000 years. Before 420,000 years ago, when interglacials were cooler, maximum CH4 concentrations were only about 600 ppbv, similar to lower Holocene values. In contrast, the N2O record shows maximum concentrations of 278 +/- 7 ppbv, slightly higher than early Holocene values.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spahni, Renato -- Chappellaz, Jerome -- Stocker, Thomas F -- Loulergue, Laetitia -- Hausammann, Gregor -- Kawamura, Kenji -- Fluckiger, Jacqueline -- Schwander, Jakob -- Raynaud, Dominique -- Masson-Delmotte, Valerie -- Jouzel, Jean -- New York, N.Y. -- Science. 2005 Nov 25;310(5752):1317-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16311333" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 9
    facet.materialart.
    Unknown
    Response (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-10-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Raynaud, D -- Banola, J M -- Chappellaz, J -- Delmas, R J -- Lorius, C -- Jouzel, J -- Schwander, J -- New York, N.Y. -- Science. 1993 Oct 29;262(5134):764.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17812345" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Atmospheric science. Shifting gear, quickly (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-04-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nisbet, E G -- Chappellaz, J -- New York, N.Y. -- Science. 2009 Apr 24;324(5926):477-8. doi: 10.1126/science.1172001.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Earth Sciences, Royal Holloway, University of London, Egham TW20 0EX, UK. e.nisbet@es.rhul.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19390036" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...