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  Rapid climate changes in the tropical Atlantic region during the last deglaciation

Hughen, K. A., Overpeck, J. T., Peterson, L. C., & Trumbore, S. E. (1996). Rapid climate changes in the tropical Atlantic region during the last deglaciation. Nature, 380(6569), 51-54. doi:10.1038/380051a0.

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Hughen, K. A., Author
Overpeck, J. T., Author
Peterson, L. C., Author
Trumbore, Susan E.1, Author              
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1External Organizations, ou_persistent22              

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Free keywords: greenland ice ocean circulation records sediments event core
 Abstract: The climate system is capable of changing abruptly from one stable mode to another(1-3). Rapid climate oscillations--in particular the Younger Dryas cold period during the last deglaciation--have long been recognized from records throughout the North Atlantic region(4-14), and the distribution of these records at mostly high latitudes suggests that the changes were caused by rapid reorganizations of the North Atlantic thermohaline circulation(6,8,10,15). But events far from the North Atlantic region that are synchronous with the Younger Dryas(16-19) raise the possibility that a more global forcing mechanism was responsible(20). Here we present high-resolution records of laminated sediments of the last deglaciation from the Cariaco basin (tropical Atlantic Ocean) which show many abrupt sub-decade to century-scale oscillations in surface-ocean biological productivity that are synchronous with climate changes at high latitudes. We attribute these productivity variations to changes in or duration of upwelling rate (and hence nutrient supply) caused by changes in trade-wind strength, which is in turn influenced by the thermohaline circulation through its effect on sea surface tempersture(6,21). Abrupt climate changes in the tropical Atlantic during the last deglaciation are thus consistent with a North Atlantic circulation forcing mechanism.

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Language(s): eng - English
 Dates: 1996
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: Other: BEX427
DOI: 10.1038/380051a0
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Title: Nature
  Abbreviation : Nature
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 380 (6569) Sequence Number: - Start / End Page: 51 - 54 Identifier: ISSN: 0028-0836
CoNE: https://pure.mpg.de/cone/journals/resource/954925427238