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DOI10.1016/j.quascirev.2019.06.019
Caribbean hydroclimate and vegetation history across the last glacial period
Warken, Sophie F.1,2,3; Scholz, Denis1; Spoetl, Christoph4; Jochum, Klaus P.5; Pajon, Jesus M.6; Bahr, Andre3; Mangini, Augusto2
发表日期2019
ISSN0277-3791
卷号218页码:75-90
英文摘要

We present a new speleothem trace element and stable isotope record, which extends previous paleoclimate evidence from Cuban speleothems to the last 96 ka. Multiple proxies were used to reconstruct Caribbean hydroclimate and vegetation variability on orbital to millennial timescales. In particular, our proxies indicate a shift to more abundant C4 (compared to C3) vegetation and/or reduced soil activity during the Last Glacial Maximum. Our results confirm the close link of Caribbean precipitation to North Atlantic climate variability, insolation and the strength of the AMOC. The associated variations in Caribbean SSTs and the shift of the ITCZ led to substantial changes of the hydrological cycle. During Heinrich stadials and the Younger Dryas, climatic conditions in Cuba were comparably cool and/or dry. In contrast, warm Dansgaard/Oeschger cycles were accompanied by wetter conditions. This is in agreement with previous evidence for the Holocene, when North Atlantic cold (warm) events coincided with drier (wetter) conditions in Cuba. However, our record suggests that this connection was less dominant during MIS 4 to 2, displayed by a weaker response of Cuban precipitation proxies to North Atlantic climatic shifts than during MIS 5 in particular. We hypothesize that this weaker connection was mediated by the southerly shifted ITCZ inducing a weakening of the northern branch of the Caribbean Low Level Jet which usually transports moisture into the northern Caribbean. This is strikingly evident during the deglacial, when driest and/or coolest conditions prevailed in western Cuba from HS 1 into the Younger Dryas, including the Bolling/Allered interstadial. (C) 2019 Elsevier Ltd. All rights reserved.


WOS研究方向Physical Geography ; Geology
来源期刊QUATERNARY SCIENCE REVIEWS
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/101892
作者单位1.Johannes Gutenberg Univ Mainz, Inst Geosci, Mainz, Germany;
2.Heidelberg Univ, Inst Environm Phys, Heidelberg, Germany;
3.Heidelberg Univ, Inst Earth Sci, Heidelberg, Germany;
4.Univ Innsbruck, Inst Geol, Innsbruck, Austria;
5.Max Planck Inst Chem, Climate Geochem Dept, Mainz, Germany;
6.Natl Museum Nat Hist, Dept Paleogeog & Paleobiol, Havana, Cuba
推荐引用方式
GB/T 7714
Warken, Sophie F.,Scholz, Denis,Spoetl, Christoph,et al. Caribbean hydroclimate and vegetation history across the last glacial period[J],2019,218:75-90.
APA Warken, Sophie F..,Scholz, Denis.,Spoetl, Christoph.,Jochum, Klaus P..,Pajon, Jesus M..,...&Mangini, Augusto.(2019).Caribbean hydroclimate and vegetation history across the last glacial period.QUATERNARY SCIENCE REVIEWS,218,75-90.
MLA Warken, Sophie F.,et al."Caribbean hydroclimate and vegetation history across the last glacial period".QUATERNARY SCIENCE REVIEWS 218(2019):75-90.
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