Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium
Late Holocene climate in western North America was punctuated by periods of extended aridity called megadroughts. These droughts have been linked to cool eastern tropical Pacific sea surface temperatures (SSTs). Here, we show both short-term and long-term climate variability over the last 1,500 y fr...
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ftpubmed:oai:pubmedcentral.nih.gov:3683710 2023-05-15T17:33:06+02:00 Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium Asmerom, Yemane Polyak, Victor J. Rasmussen, Jessica B. T. Burns, Stephen J. Lachniet, Matthew 2013-06-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3683710 http://www.ncbi.nlm.nih.gov/pubmed/23716648 https://doi.org/10.1073/pnas.1214870110 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3683710 http://www.ncbi.nlm.nih.gov/pubmed/23716648 http://dx.doi.org/10.1073/pnas.1214870110 Physical Sciences Text 2013 ftpubmed https://doi.org/10.1073/pnas.1214870110 2013-12-15T01:25:55Z Late Holocene climate in western North America was punctuated by periods of extended aridity called megadroughts. These droughts have been linked to cool eastern tropical Pacific sea surface temperatures (SSTs). Here, we show both short-term and long-term climate variability over the last 1,500 y from annual band thickness and stable isotope speleothem data. Several megadroughts are evident, including a multicentury one, AD 1350–1650, herein referred to as Super Drought, which corresponds to the coldest period of the Little Ice Age. Synchronicity between southwestern North American, Chinese, and West African monsoon precipitation suggests the megadroughts were hemispheric in scale. Northern Hemisphere monsoon strength over the last millennium is positively correlated with Northern Hemisphere temperature and North Atlantic SST. The megadroughts are associated with cooler than average SST and Northern Hemisphere temperatures. Furthermore, the megadroughts, including the Super Drought, coincide with solar insolation minima, suggesting that solar forcing of sea surface and atmospheric temperatures may generate variations in the strength of Northern Hemisphere monsoons. Our findings seem to suggest stronger (wetter) Northern Hemisphere monsoons with increased warming. Text North Atlantic PubMed Central (PMC) Pacific Proceedings of the National Academy of Sciences 110 24 9651 9656 |
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Physical Sciences Asmerom, Yemane Polyak, Victor J. Rasmussen, Jessica B. T. Burns, Stephen J. Lachniet, Matthew Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium |
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Physical Sciences |
description |
Late Holocene climate in western North America was punctuated by periods of extended aridity called megadroughts. These droughts have been linked to cool eastern tropical Pacific sea surface temperatures (SSTs). Here, we show both short-term and long-term climate variability over the last 1,500 y from annual band thickness and stable isotope speleothem data. Several megadroughts are evident, including a multicentury one, AD 1350–1650, herein referred to as Super Drought, which corresponds to the coldest period of the Little Ice Age. Synchronicity between southwestern North American, Chinese, and West African monsoon precipitation suggests the megadroughts were hemispheric in scale. Northern Hemisphere monsoon strength over the last millennium is positively correlated with Northern Hemisphere temperature and North Atlantic SST. The megadroughts are associated with cooler than average SST and Northern Hemisphere temperatures. Furthermore, the megadroughts, including the Super Drought, coincide with solar insolation minima, suggesting that solar forcing of sea surface and atmospheric temperatures may generate variations in the strength of Northern Hemisphere monsoons. Our findings seem to suggest stronger (wetter) Northern Hemisphere monsoons with increased warming. |
format |
Text |
author |
Asmerom, Yemane Polyak, Victor J. Rasmussen, Jessica B. T. Burns, Stephen J. Lachniet, Matthew |
author_facet |
Asmerom, Yemane Polyak, Victor J. Rasmussen, Jessica B. T. Burns, Stephen J. Lachniet, Matthew |
author_sort |
Asmerom, Yemane |
title |
Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium |
title_short |
Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium |
title_full |
Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium |
title_fullStr |
Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium |
title_full_unstemmed |
Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium |
title_sort |
multidecadal to multicentury scale collapses of northern hemisphere monsoons over the past millennium |
publisher |
National Academy of Sciences |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3683710 http://www.ncbi.nlm.nih.gov/pubmed/23716648 https://doi.org/10.1073/pnas.1214870110 |
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Pacific |
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Pacific |
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North Atlantic |
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North Atlantic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3683710 http://www.ncbi.nlm.nih.gov/pubmed/23716648 http://dx.doi.org/10.1073/pnas.1214870110 |
op_doi |
https://doi.org/10.1073/pnas.1214870110 |
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Proceedings of the National Academy of Sciences |
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110 |
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24 |
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9651 |
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9656 |
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1766131495152386048 |