Готові списки джерел за темами / Antarctic Cold Reversal

Добірка наукової літератури з теми "Antarctic Cold Reversal"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Antarctic Cold Reversal"

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Pedro, J. B., T. D. van Ommen, S. O. Rasmussen, V. I. Morgan, J. Chappellaz, A. D. Moy, V. Masson-Delmotte, and M. Delmotte. "The last deglaciation: timing the bipolar seesaw." Climate of the Past Discussions 7, no. 1 (January 26, 2011): 397–430. http://dx.doi.org/10.5194/cpd-7-397-2011.

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Анотація:
Abstract. Precise information on the relative timing of north-south climate variations is a key to resolving questions concerning the mechanisms that force and couple climate changes between the hemispheres. We present a new composite record made from five well-resolved Antarctic ice core records that robustly represents the timing of regional Antarctic climate change during the last deglaciation. Using fast variations in global methane gas concentrations as time markers, the Antarctic composite is directly compared to Greenland ice core records, allowing a detailed mapping of the inter-hemispheric sequence of climate changes. Consistent with prior studies the synchronized records show that warming (and cooling) trends in Antarctica closely match cold (and warm) periods in Greenland on millennial timescales. For the first time, we also identify a sub-millennial component to the inter-hemispheric coupling: within the Antarctic Cold Reversal the strongest Antarctic cooling occurs during the pronounced northern warmth of the Bølling; warming then resumes in Antarctica during the Intra-Allerød Cold Period i.e. prior to the Younger Dryas stadial. There is little-to-no time lag between climate transitions in Greenland and opposing changes in Antarctica. Our results lend support to fast acting inter-hemispheric coupling mechanisms including recently proposed bipolar atmospheric teleconnections and/or rapid bipolar ocean teleconnections.
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Pedro, J. B., T. D. van Ommen, S. O. Rasmussen, V. I. Morgan, J. Chappellaz, A. D. Moy, V. Masson-Delmotte, and M. Delmotte. "The last deglaciation: timing the bipolar seesaw." Climate of the Past 7, no. 2 (June 24, 2011): 671–83. http://dx.doi.org/10.5194/cp-7-671-2011.

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Анотація:
Abstract. Precise information on the relative timing of north-south climate variations is a key to resolving questions concerning the mechanisms that force and couple climate changes between the hemispheres. We present a new composite record made from five well-resolved Antarctic ice core records that robustly represents the timing of regional Antarctic climate change during the last deglaciation. Using fast variations in global methane gas concentrations as time markers, the Antarctic composite is directly compared to Greenland ice core records, allowing a detailed mapping of the inter-hemispheric sequence of climate changes. Consistent with prior studies the synchronized records show that warming (and cooling) trends in Antarctica closely match cold (and warm) periods in Greenland on millennial timescales. For the first time, we also identify a sub-millennial component to the inter-hemispheric coupling. Within the Antarctic Cold Reversal the strongest Antarctic cooling occurs during the pronounced northern warmth of the Bølling. Warming then resumes in Antarctica, potentially as early as the Intra-Allerød Cold Period, but with dating uncertainty that could place it as late as the onset of the Younger Dryas stadial. There is little-to-no time lag between climate transitions in Greenland and opposing changes in Antarctica. Our results lend support to fast acting inter-hemispheric coupling mechanisms, including recently proposed bipolar atmospheric teleconnections and/or rapid bipolar ocean teleconnections.
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Pedro, Joel B., Helen C. Bostock, Cecilia M. Bitz, Feng He, Marcus J. Vandergoes, Eric J. Steig, Brian M. Chase, et al. "The spatial extent and dynamics of the Antarctic Cold Reversal." Nature Geoscience 9, no. 1 (November 9, 2015): 51–55. http://dx.doi.org/10.1038/ngeo2580.

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García, Juan L., Michael R. Kaplan, Brenda L. Hall, Joerg M. Schaefer, Rodrigo M. Vega, Roseanne Schwartz, and Robert Finkel. "Glacier expansion in southern Patagonia throughout the Antarctic cold reversal." Geology 40, no. 9 (September 2012): 859–62. http://dx.doi.org/10.1130/g33164.1.

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Fletcher, Michael-Shawn, Joel Pedro, Tegan Hall, Michela Mariani, Joseph A. Alexander, Kristen Beck, Maarten Blaauw, et al. "Northward shift of the southern westerlies during the Antarctic Cold Reversal." Quaternary Science Reviews 271 (November 2021): 107189. http://dx.doi.org/10.1016/j.quascirev.2021.107189.

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Jomelli, V., L. Martin, P. H. Blard, V. Favier, M. Vuillé, and J. L. Ceballos. "Revisiting the andean tropical glacier behavior during the Antarctic cold reversal." Cuadernos de Investigación Geográfica 43, no. 2 (September 15, 2017): 629. http://dx.doi.org/10.18172/cig.3201.

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Анотація:
The sensitivity of tropical glaciers to paleoclimatic conditions that prevailed during the Antarctic cold reversal (ACR, ca. 14.5-12.9 ka) has been the subject of a wide debate. In 2014 a paper suggested that tropical glaciers responded very sensitively to the changing climate during the ACR (Jomelli et al., 2014). In this study, we reexamine the conclusions from this study by recalculating previous chronologies based on 226 10Be and 14 3He ages respectively, and using the most up-to date production rates for these cosmogenic nuclides in the Tropical Andes. 53 moraines from 25 glaciers were selected from the previous analysis provided by Jomelli et al. (2014) located in Colombia, Peru and Bolivia. We then focused on two distinct calculations. First we considered the oldest moraine and its uncertainty for every glacier representing the preserved evidence of the maximum glacier extents during the last deglaciation period, and binned the results into 5 distinct periods encompassing the Antarctic cold reversal and Younger Dryas (YD) chronozones: pre-ACR, ACR, ACR-YD, YD and post-YD respectively. Results revealed a predominance of pre-ACR and ACR ages, accounting for 60% of the glaciers. Second we counted the number of moraines per glacier according to the different groups. 21 moraines (40%) of the selected glaciers belong to the pre-ACR-ACR chronozones while 3 moraines only (5%) were dated to the YD and YD-Holocene groups. The rest was assigned to the ACR-YD. These results suggest that moraine records are a very good proxy to document the ACR signal in the Tropical Andes.
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Putnam, Aaron E., George H. Denton, Joerg M. Schaefer, David J. A. Barrell, Bjørn G. Andersen, Robert C. Finkel, Roseanne Schwartz, Alice M. Doughty, Michael R. Kaplan, and Christian Schlüchter. "Glacier advance in southern middle-latitudes during the Antarctic Cold Reversal." Nature Geoscience 3, no. 10 (September 26, 2010): 700–704. http://dx.doi.org/10.1038/ngeo962.

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Davies, B. J., V. R. Thorndycraft, D. Fabel, and J. R. V. Martin. "Asynchronous glacier dynamics during the Antarctic Cold Reversal in central Patagonia." Quaternary Science Reviews 200 (November 2018): 287–312. http://dx.doi.org/10.1016/j.quascirev.2018.09.025.

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Jomelli, V., V. Favier, M. Vuille, R. Braucher, L. Martin, P. H. Blard, C. Colose, et al. "A major advance of tropical Andean glaciers during the Antarctic cold reversal." Nature 513, no. 7517 (August 24, 2014): 224–28. http://dx.doi.org/10.1038/nature13546.

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Dupont, Lydie M., Jung-Hyun Kim, Ralph R. Schneider, and Ning Shi. "Southwest African climate independent of Atlantic sea surface temperatures during the Younger Dryas." Quaternary Research 61, no. 3 (May 2004): 318–24. http://dx.doi.org/10.1016/j.yqres.2004.02.005.

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Анотація:
To investigate land–sea interactions during deglaciation, we compared proxies for continental (pollen percentages and accumulation rates) and marine conditions (dinoflagellate cyst percentages and alkenone-derived sea surface temperatures). The proxies were from published data from an AMS-radiocarbon-dated sedimentary record of core GeoB 1023-5 encompassing the past 21,000 years. The site is located at ca. 2000 m water depth just north of the Walvis Ridge and in the vicinity of the Cunene River mouth. We infer that the parallelism between increasing sea surface temperatures and a southward shift of the savanna occurred only during the earliest part of the deglaciation. After the Antarctic Cold Reversal, southeast Atlantic sea surface temperatures no longer influenced the vegetation development in the Kalahari. Stronger trade winds during the Antarctic Cold Reversal and the Younger Dryas period probably caused increased upwelling off the coast of Angola. A southward shift of the Atlantic anti-cyclone could have resulted in both stronger trade winds and reduced impact of the Westerlies on the climate of southwestern Africa.
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Більше джерел

Частини книг з теми "Antarctic Cold Reversal"

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"WHY ‘YOUNGER DRYAS’? WHY NOT ‘ANTARCTIC COLD REVERSAL’? EKSTEENFONTEIN REVISITED." In New Studies on Former and Recent Landscape Changes in Africa, 175–96. CRC Press, 2013. http://dx.doi.org/10.1201/b15982-10.

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van Santen, Rutger, Djan Khoe, and Bram Vermeer. "Dealing with Our Climate." In 2030. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780195377170.003.0012.

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We’re standing by the observatory at the top of the Telegrafenberg (Telegraph Hill) in the German city of Potsdam. The neoclassical building towers over its surroundings. The hill is situated in the former German Democratic Republic, close to the place where the Berlin Wall once stood. Through the slight haze, we can make out the contours of Berlin and the smoking chimneys of power stations. To our right is another hill, the Teufelsberg, with an American listening post as a relic of the cold war. Successive kaisers developed the Telegraph Hill in the nineteenth century, building a community of leading scientists there. Karl Schwarzschild used the telescope to produce his star catalog, the first in the world, while in the basement of the same building some 30 years earlier, Albert Michelson had studied light, measuring its speed and identifying certain inexplicable characteristics in the process. Albert Einstein worked here, too, basing his special theory of relativity on Michelson’s discoveries. “Fundamental natural phenomena have been isolated at this place,” says Hans Joachim Schellnhuber, director of the Potsdam Institute for Climate Impact Research, which now occupies the brow of the Telegraph Hill. “For many years, scientists have withdrawn to the quiet of this hill to develop their ideas. My task today is to reverse that movement: Rather than isolating it, we want to bring knowledge together. And instead of withdrawing from the world, we have to engage with it—to make clear to people just where our climate is headed.” Schellnhuber has thrown himself into that task with considerable verve. He has been discussing scientific issues with German chancellor Angela Merkel, for instance. He knows that his climate message is a complex one, which is why Schellnhuber avoids statistically detailed predictions and focuses instead on a number of crucial “tipping points.” “How much change can the earth sustain? Can we afford to allow the West African monsoon to collapse? Or the Himalayan glaciers to melt away? Will we be able to preserve the ice in the Antarctic? What happens if the Amazon rainforest disappears?”
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Тези доповідей конференцій з теми "Antarctic Cold Reversal"

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Stewart, Joseph, Peter Spooner, Andrea Burke, Tianyu Chen, Tao Li, James Rae, Jenny Roberts, Victoria Peck, Qian Liu, and Laura Robinson. "Productivity and Dissolved Oxygen Controls on the Southern Ocean Deep-Sea Benthos during the Antarctic Cold Reversal." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2463.

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