Abrupt Climatic Transitions: Surface To Deep-Water Response From High-Resolution Sediment Records, Santa Barbara, California

气候突变：高分辨率沉积物记录的地表到深水响应，加利福尼亚州圣巴巴拉

• 批准号: 0242041
• 负责人: James Kennett
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-02-15 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0242041&HistoricalAwards=false
• 关键词: Abrupt; Climatic; Transitions; Surface; Deep

The objectives of this research are to better understand the magnitude, depth and timing of changes in upper intermediate waters off southern California in relation to decadal to millennial scale climate change and test the relationship of changes along the California margin to global climate signals associated with deglaciation events of the late Quaternary. The hypothesis that tropical changes preceded high-latitude changes will be tested by comparing records of ventilation changes in intermediate waters with surface water records. The study will focus on well known transitions and intervals of rapid climate change, such as Terminations 1A and 1B and interstadials 3, 4, and 5. Multiproxy analyses, including stable isotope analyses of benthic and planktic foraminifers, Mg/Ca analyses of benthic and planktic foraminifers and coiling ratios of selected planktic foraminifers will be done at decadal-scale resolution across the critical intervals in piston cores recovered from the Santa Barbara Basin.

这项研究的目的是更好地了解南加州附近中上层水域与十年至千年尺度气候变化相关的变化的幅度、深度和时间，并测试沿加州边缘的变化与与冰川消融相关的全球气候信号的关系第四纪晚期的事件。 热带变化先于高纬度变化的假设将通过比较中间水域通风变化记录与地表水记录来检验。 该研究将重点关注气候快速变化的众所周知的转变和间隔，例如终端 1A 和 1B 以及间期 3、4 和 5。多代理分析，包括底栖和浮游有孔虫的稳定同位素分析、底栖和浮游有孔虫的 Mg/Ca 分析。浮游有孔虫和选定浮游有孔虫的卷绕比将以十年尺度分辨率在关键范围内进行从圣巴巴拉盆地回收的活塞芯的间隔。