Abstract：
:Climate indices based on sea surface temperature (SST) can synthesize information related to physical processes that describe change and variability in continental precipitation from floods to droughts. The South Atlantic Subtropical Dipole index (SASD) is based on the distribution of SST in the South Atlantic and fits these criteria. It represents the dominant mode of variability of SST in the South Atlantic, which is modulated by changes in the position and intensity of the South Atlantic Subtropical High. Here we reconstructed an index of the South Atlantic Ocean SST (SASD-like) for the past twelve thousand years (the Holocene period) based on proxy-data. This has great scientific implications and important socio-economic ramifications because of its ability to infer variability of precipitation and moisture over South America where past climate data is limited. For the first time a reconstructed index based on proxy data on opposite sides of the SASD-like mode is able to capture, in the South Atlantic, the significant cold events in the Northern Hemisphere at 12.9-11.6 kyr BP and 8.6-8.0 ky BP. These events are related, using a transient model simulation, to precipitation changes over South America.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Wainer I,Prado LF,Khodri M,Otto-Bliesner Bdoi
10.1038/srep05291subject
Has Abstractpub_date
2014-06-13 00:00:00pages
5291issn
2045-2322pii
srep05291journal_volume
4pub_type
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pub_type： 杂志文章
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更新日期：2016-06-10 00:00:00
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pub_type： 杂志文章,多中心研究
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