A Coral Perspective on Holocene Climate Variability in the Tropical Western Atlantic

热带西大西洋全新世气候变化的珊瑚视角

• 批准号: 0221750
• 负责人: Terrence Quinn
• 金额: $ 27.08万
• 依托单位: University of South Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0221750&HistoricalAwards=false
• 关键词: Coral; Perspective; Holocene; Climate; Variability

Funds are recommended for assessment of average and seasonal sea-surface temperature and seawater delta O-18 at annual to decadal scales from monthly sub-samples in select intervals of the Holocene on samples from the Dry Tortugas. The study also includes a calibration effort for the past century. It aims to reconstruct Holocene (selected time-slices over the last 8.2 Ka) changes in western Tropical Atlantic SSTs and salinity using Sr/Ca and stable isotope analyses of fossil corals. The approach takes advantage of the fact that corals record temperature and (salinity) histories over a narrow depth range of the tropical ocean, and that fossil corals provide a means to reconstruct ocean properties for discrete short (multi-century) time slices throughout the Holocene. Coral paleoclimate reconstructions from the tropics will improve our understanding of the mechanisms driving the climate changes in the Holocene.

建议提供资金，从全新世选定时间间隔的每月子样本中，对来自干龟的样本进行年度至十年尺度的平均和季节性海面温度以及海水O-18三角洲评估。这项研究还包括过去世纪的校准工作。它的目的是重建全新世（选定的时间片在过去的8.2 Ka）的变化，在热带大西洋西部的SST和盐度的Sr/Ca和稳定同位素分析的化石珊瑚。该方法利用了珊瑚记录热带海洋狭窄深度范围内的温度和（盐度）历史的事实，以及珊瑚化石提供了一种手段来重建整个全新世离散的短（多世纪）时间片的海洋属性。热带珊瑚的古气候重建将提高我们对全新世气候变化驱动机制的理解。