Tropical Climate Change on Millennial to Milankovitch Time-Scales Over the Last 550,000 Years: An Evaluation From Cariaco Basin Sediments

摘要：本提案要求支持完成从卡里亚科盆地ODP站点1002到沉积物剖面底部约55万年的多代理古气候记录。这项研究将包括整个记录的稳定同位素和有孔虫普查数据，样本分辨率约为300年。临界区间将以更精细的分辨率进行采样，以评估亚世纪尺度的特征。这项研究将与非正式合作者对许多其他代理的测量以及建模工作进行协调。总体目标是提供一个完整的数据集，适合于检验热带水文变化是千禧年至米兰科维奇时间尺度上全球气候变化的潜在驱动因素这一假设。

Summary: This proposal request support to complete a multiproxy paleoclimate record from Cariaco Basin ODP Site 1002 to the base of the sediment section at about 550,000 years. The study will include stable isotope and foraminiferal census data at sample resolution of about 300 years for the entire record. Critical intervals will be sampled at finer resolution to evaluate subcentury-scale features. The study will be coordinated with measurements of a number of other proxies by informal collaborators as well as a modeling effort. The overall objective is to provide an integrated data set suitable for testing the hypothesis that changes in tropical hydrology are a potential driver of global climate change on millennial to Milankovich time-scales.