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Late Holocene Decadal-to Century-scale Climate Variability in the Tropical Atlantic as Recorded in the Cariaco Basin

卡里亚科盆地记录的热带大西洋晚全新世十年至世纪尺度的气候变化

基本信息

批准号：
9819262
负责人：
David Black
金额：
$ 8.72万
依托单位：
University of South Carolina at Columbia
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1999
资助国家：
美国
起止时间：
1999-02-01 至 2001-10-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9819262&HistoricalAwards=false
关键词：
Late Holocene Decadal Century scale

项目摘要

AbstractATM-9819262Black, David E.University of South CarolinaTitle: Late Holocene Decadal-to Century-scale Climate Variability in the Tropical Atlantic as Recorded in the Cariaco BasinThis award supports an integrated study to extend as existing record of decadal-to century-scale climate and ocean variability in the Caribbean/western Atlantic back 2000 years as recorded in the varved, high-deposition rate sediments of the Cariaco Basin, Venezuela. The Cariaco Basin sediment record represents one of the very few marine records, if not the only record, in the Atlantic which has the potential to provide continuous, near-annually dated records of tropical climate and ocean variability which span the last 2000 years. The sediments of the Cariaco Basin provide the opportunity to examine a variety of climate variables (e.g., trade wind intensity, ITCZ fluctuations, seasonal sea surface temperatures, etc.), and to explore how these variables interact and respond to external forcing mechanisms such as variations in the thermohaline circulation of the Atlantic and insolation changes on decadal to century time-scales. Paleoenvironmental time-series produced by this project will provide a critical regional data set for a large and poorly understood area of the tropical Atlantic that can be used to interpret current climate observations and to test and validate numerical models of global climate change.

摘要ATM-9819262 Black，大卫E.南卡罗来纳大学Cariaco盆地记录的热带大西洋晚全新世十年至百年尺度气候变率该奖项支持一项综合研究，将加勒比海/西大西洋的十年至百年尺度气候和海洋变率的现有记录扩展到2000年，委内瑞拉Cariaco盆地的高沉积速率沉积物。 Cariaco盆地的沉积物记录是大西洋为数不多的海洋记录之一，如果不是唯一的记录的话，它有可能提供过去2000年来热带气候和海洋变化的连续的、几乎每年一次的记录。 Cariaco盆地的沉积物提供了研究各种气候变量的机会（例如，信风强度、ITCZ波动、季节性海面温度等），并探索这些变量如何相互作用并响应外部强迫机制，例如大西洋温盐环流的变化和十年到世纪时间尺度上的日照变化。该项目产生的古环境时间序列将为热带大西洋一个大面积但知之甚少的地区提供关键的区域数据集，可用于解释当前的气候观测，并测试和验证全球气候变化的数值模型。