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

摘要ATM-9819262 Black，David E.南卡罗来纳大学题目：加勒比盆地记录的热带大西洋晚全新世十年至世纪尺度气候变异性该奖项支持一项综合研究，以扩展现有记录的加勒比海/西大西洋2000年前十年至世纪尺度的气候和海洋变异性，记录在委内瑞拉Cariaco盆地的各种高沉积速率的沉积物中。Cariaco盆地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，它有可能提供跨越过去2000年的热带气候和海洋变化性的连续、近一年的日期记录。Cariaco盆地的沉积物提供了机会来研究各种气候变量(例如，信风强度、ITCZ波动、季节性海表面温度等)，并探讨这些变量如何相互作用并对外部强迫机制作出反应，例如大西洋温盐环流的变化和在十年至世纪的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大片知之甚少的区域提供一个关键的区域数据集，可用于解释当前的气候观测结果以及测试和验证全球气候变化的数值模型。

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.