Hydrologic impacts of past shifts of Earth’s thermal equator offer insight into those to be produced by fossil fuel CO2
Major changes in global rainfall patterns accompanied a northward shift of Earth’s thermal equator at the onset of an abrupt climate change 14.6 kya. This northward pull of Earth’s wind and rain belts stemmed from disintegration of North Atlantic winter sea ice cover, which steepened the interhemisp...
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ftpubmed:oai:pubmedcentral.nih.gov:3801043 2023-05-15T17:33:09+02:00 Hydrologic impacts of past shifts of Earth’s thermal equator offer insight into those to be produced by fossil fuel CO2 Broecker, Wallace S. Putnam, Aaron E. 2013-10-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3801043 http://www.ncbi.nlm.nih.gov/pubmed/24077260 https://doi.org/10.1073/pnas.1301855110 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3801043 http://www.ncbi.nlm.nih.gov/pubmed/24077260 http://dx.doi.org/10.1073/pnas.1301855110 Perspective Text 2013 ftpubmed https://doi.org/10.1073/pnas.1301855110 2014-04-20T00:32:08Z Major changes in global rainfall patterns accompanied a northward shift of Earth’s thermal equator at the onset of an abrupt climate change 14.6 kya. This northward pull of Earth’s wind and rain belts stemmed from disintegration of North Atlantic winter sea ice cover, which steepened the interhemispheric meridional temperature gradient. A southward migration of Earth’s thermal equator may have accompanied the more recent Medieval Warm to Little Ice Age climate transition in the Northern Hemisphere. As fossil fuel CO2 warms the planet, the continents of the Northern Hemisphere are expected to warm faster than the Southern Hemisphere oceans. Therefore, we predict that a northward shift of Earth’s thermal equator, initiated by an increased interhemispheric temperature contrast, may well produce hydrologic changes similar to those that occurred during past Northern Hemisphere warm periods. If so, the American West, the Middle East, and southern Amazonia will become drier, and monsoonal Asia, Venezuela, and equatorial Africa will become wetter. Additional paleoclimate data should be acquired and model simulations should be conducted to evaluate the reliability of this analog. Text North Atlantic Sea ice PubMed Central (PMC) Kya ENVELOPE(8.308,8.308,63.772,63.772) Proceedings of the National Academy of Sciences 110 42 16710 16715 |
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Perspective Broecker, Wallace S. Putnam, Aaron E. Hydrologic impacts of past shifts of Earth’s thermal equator offer insight into those to be produced by fossil fuel CO2 |
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Perspective |
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Major changes in global rainfall patterns accompanied a northward shift of Earth’s thermal equator at the onset of an abrupt climate change 14.6 kya. This northward pull of Earth’s wind and rain belts stemmed from disintegration of North Atlantic winter sea ice cover, which steepened the interhemispheric meridional temperature gradient. A southward migration of Earth’s thermal equator may have accompanied the more recent Medieval Warm to Little Ice Age climate transition in the Northern Hemisphere. As fossil fuel CO2 warms the planet, the continents of the Northern Hemisphere are expected to warm faster than the Southern Hemisphere oceans. Therefore, we predict that a northward shift of Earth’s thermal equator, initiated by an increased interhemispheric temperature contrast, may well produce hydrologic changes similar to those that occurred during past Northern Hemisphere warm periods. If so, the American West, the Middle East, and southern Amazonia will become drier, and monsoonal Asia, Venezuela, and equatorial Africa will become wetter. Additional paleoclimate data should be acquired and model simulations should be conducted to evaluate the reliability of this analog. |
format |
Text |
author |
Broecker, Wallace S. Putnam, Aaron E. |
author_facet |
Broecker, Wallace S. Putnam, Aaron E. |
author_sort |
Broecker, Wallace S. |
title |
Hydrologic impacts of past shifts of Earth’s thermal equator offer insight into those to be produced by fossil fuel CO2 |
title_short |
Hydrologic impacts of past shifts of Earth’s thermal equator offer insight into those to be produced by fossil fuel CO2 |
title_full |
Hydrologic impacts of past shifts of Earth’s thermal equator offer insight into those to be produced by fossil fuel CO2 |
title_fullStr |
Hydrologic impacts of past shifts of Earth’s thermal equator offer insight into those to be produced by fossil fuel CO2 |
title_full_unstemmed |
Hydrologic impacts of past shifts of Earth’s thermal equator offer insight into those to be produced by fossil fuel CO2 |
title_sort |
hydrologic impacts of past shifts of earth’s thermal equator offer insight into those to be produced by fossil fuel co2 |
publisher |
National Academy of Sciences |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3801043 http://www.ncbi.nlm.nih.gov/pubmed/24077260 https://doi.org/10.1073/pnas.1301855110 |
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ENVELOPE(8.308,8.308,63.772,63.772) |
geographic |
Kya |
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Kya |
genre |
North Atlantic Sea ice |
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North Atlantic Sea ice |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3801043 http://www.ncbi.nlm.nih.gov/pubmed/24077260 http://dx.doi.org/10.1073/pnas.1301855110 |
op_doi |
https://doi.org/10.1073/pnas.1301855110 |
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Proceedings of the National Academy of Sciences |
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110 |
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42 |
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16710 |
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16715 |
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1766131552682508288 |