author_facet Asmerom, Yemane
Polyak, Victor J.
Rasmussen, Jessica B. T.
Burns, Stephen J.
Lachniet, Matthew
Asmerom, Yemane
Polyak, Victor J.
Rasmussen, Jessica B. T.
Burns, Stephen J.
Lachniet, Matthew
author Asmerom, Yemane
Polyak, Victor J.
Rasmussen, Jessica B. T.
Burns, Stephen J.
Lachniet, Matthew
spellingShingle Asmerom, Yemane
Polyak, Victor J.
Rasmussen, Jessica B. T.
Burns, Stephen J.
Lachniet, Matthew
Proceedings of the National Academy of Sciences of the United States of America
Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium
author_sort asmerom, yemane
spelling Asmerom, Yemane Polyak, Victor J. Rasmussen, Jessica B. T. Burns, Stephen J. Lachniet, Matthew 0027-8424 National Academy of Sciences https://www.jstor.org/stable/42706060 <p>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.</p> Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium Proceedings of the National Academy of Sciences of the United States of America
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title Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium
title_unstemmed 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_short 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
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author Asmerom, Yemane, Polyak, Victor J., Rasmussen, Jessica B. T., Burns, Stephen J., Lachniet, Matthew
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description <p>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.</p>
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spelling Asmerom, Yemane Polyak, Victor J. Rasmussen, Jessica B. T. Burns, Stephen J. Lachniet, Matthew 0027-8424 National Academy of Sciences https://www.jstor.org/stable/42706060 <p>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.</p> Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium Proceedings of the National Academy of Sciences of the United States of America
spellingShingle Asmerom, Yemane, Polyak, Victor J., Rasmussen, Jessica B. T., Burns, Stephen J., Lachniet, Matthew, Proceedings of the National Academy of Sciences of the United States of America, Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium
title 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_short 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
title_unstemmed Multidecadal to multicentury scale collapses of Northern Hemisphere monsoons over the past millennium
url https://www.jstor.org/stable/42706060