Climate response to the 8.2 ka event in coastal California

Abstract A fast-growing stalagmite from the central California coast provides a high-resolution record of climatic changes synchronous with global perturbations resulting from the catastrophic drainage of proglacial Lake Agassiz at ca. 8.2 ka. High frequency, large amplitude variations in carbon iso...

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Autores principales:	Jessica L. Oster, Warren D. Sharp, Aaron K. Covey, Jansen Gibson, Bruce Rogers, Hari Mix
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0ad635c2ba594349aef110616763c4d7
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spelling	oai:doaj.org-article:0ad635c2ba594349aef110616763c4d72021-12-02T16:08:10ZClimate response to the 8.2 ka event in coastal California10.1038/s41598-017-04215-52045-2322https://doaj.org/article/0ad635c2ba594349aef110616763c4d72017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04215-5https://doaj.org/toc/2045-2322Abstract A fast-growing stalagmite from the central California coast provides a high-resolution record of climatic changes synchronous with global perturbations resulting from the catastrophic drainage of proglacial Lake Agassiz at ca. 8.2 ka. High frequency, large amplitude variations in carbon isotopes during the 8.2 ka event, coupled with pulsed increases in phosphorus concentrations, indicate more frequent or intense winter storms on the California coast. Decreased magnesium-calcium ratios point toward a sustained increase in effective moisture during the event, however the magnitude of change in Mg/Ca suggests this event was not as pronounced on the western North American coast as anomalies seen in the high northern latitudes and monsoon-influenced areas. Nevertheless, shifts in the White Moon Cave record that are synchronous within age uncertainties with cooling of Greenland, and changes in global monsoon systems, suggest rapid changes in atmospheric circulation occurred in response to freshwater input and associated cooling in the North Atlantic region. Our record is consistent with intensification of the Pacific winter storm track in response to North Atlantic freshwater forcing, a mechanism suggested by simulations of the last deglaciation, and indicates this intensification led to increases in precipitation and infiltration along the California coast during the Holocene.Jessica L. OsterWarren D. SharpAaron K. CoveyJansen GibsonBruce RogersHari MixNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jessica L. Oster Warren D. Sharp Aaron K. Covey Jansen Gibson Bruce Rogers Hari Mix Climate response to the 8.2 ka event in coastal California
description	Abstract A fast-growing stalagmite from the central California coast provides a high-resolution record of climatic changes synchronous with global perturbations resulting from the catastrophic drainage of proglacial Lake Agassiz at ca. 8.2 ka. High frequency, large amplitude variations in carbon isotopes during the 8.2 ka event, coupled with pulsed increases in phosphorus concentrations, indicate more frequent or intense winter storms on the California coast. Decreased magnesium-calcium ratios point toward a sustained increase in effective moisture during the event, however the magnitude of change in Mg/Ca suggests this event was not as pronounced on the western North American coast as anomalies seen in the high northern latitudes and monsoon-influenced areas. Nevertheless, shifts in the White Moon Cave record that are synchronous within age uncertainties with cooling of Greenland, and changes in global monsoon systems, suggest rapid changes in atmospheric circulation occurred in response to freshwater input and associated cooling in the North Atlantic region. Our record is consistent with intensification of the Pacific winter storm track in response to North Atlantic freshwater forcing, a mechanism suggested by simulations of the last deglaciation, and indicates this intensification led to increases in precipitation and infiltration along the California coast during the Holocene.
format	article
author	Jessica L. Oster Warren D. Sharp Aaron K. Covey Jansen Gibson Bruce Rogers Hari Mix
author_facet	Jessica L. Oster Warren D. Sharp Aaron K. Covey Jansen Gibson Bruce Rogers Hari Mix
author_sort	Jessica L. Oster
title	Climate response to the 8.2 ka event in coastal California
title_short	Climate response to the 8.2 ka event in coastal California
title_full	Climate response to the 8.2 ka event in coastal California
title_fullStr	Climate response to the 8.2 ka event in coastal California
title_full_unstemmed	Climate response to the 8.2 ka event in coastal California
title_sort	climate response to the 8.2 ka event in coastal california
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/0ad635c2ba594349aef110616763c4d7
work_keys_str_mv	AT jessicaloster climateresponsetothe82kaeventincoastalcalifornia AT warrendsharp climateresponsetothe82kaeventincoastalcalifornia AT aaronkcovey climateresponsetothe82kaeventincoastalcalifornia AT jansengibson climateresponsetothe82kaeventincoastalcalifornia AT brucerogers climateresponsetothe82kaeventincoastalcalifornia AT harimix climateresponsetothe82kaeventincoastalcalifornia
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Climate response to the 8.2 ka event in coastal California

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