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

本研究的目的是更好地了解南加州中上层水域变化的幅度、深度和时间与年代际至千年尺度气候变化的关系，并测试加州边缘变化与晚第四纪冰川消融事件相关的全球气候信号的关系。热带变化先于高纬度变化的假设将通过比较中间水域的通风变化记录与地表水记录来检验。该研究将侧重于众所周知的快速气候变化的过渡和间隔，如终端1A和1B以及间带3、4和5。多代理分析，包括底栖生物和浮游有孔虫的稳定同位素分析，底栖生物和浮游有孔虫的Mg/Ca分析，以及选定的浮游有孔虫的卷取比，将在圣巴巴拉盆地活塞岩心的关键区间以十年尺度分辨率进行。

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.