Response of the Eq. Pacific to Quaternary Climate Change: Sedimentary Chemical Evidence For Glacial-Interglacial Contrasts in Productivity and Chemical Transport Rate

太平洋对第四纪气候变化的响应冰川-间冰期生产力、化学输运率和陆源影响对比的沉积化学证据和陆源通量将用于确定赤道中部太平洋对第四纪气候变化的生物地球化学响应。该方法包括沿纬度样带分析井下记录。沉积化学将对沿西经140度样带在南纬2度、北纬2度、北纬5度采集的15米长的活塞岩心进行研究，从而覆盖生产力和相关沉积和成岩过程的尖锐赤道梯度。研究还将涵盖陆源颗粒物的主要风成源（信风在北纬5度的热带辐合）的影响。在过去的1ma中，井下采样策略的分辨率将达到7ky。将评估三种主要生物成分（CaCO3, Corg, opal），风蚀成分以及40种主要，痕量和稀土元素的相互作用行为。

Response of the Eq. Pacific to Quaternary Climate Change: Sedimentary Chemical Evidence For Glacial-Interglacial Contrasts In Productivity, Chemical Transport Rate, and Terrigenous Influence Chemical indicators of productivity, chemical transport rate, and terrigenous flux will be used to determine the biogeochemical response of the central equatorial Pacific Ocean to Quaternary climate change. The strategy involves the analysis of downhole records along a latitudinal transect. Sedimentary chemistry will be done on 15 m long piston cores recovered at 2 degree S, 0 degree, 2 degree N, 5 degree N, along a transect at 140 degree W, thus covering the sharp equatorial gradients in productivity and associated depositional and diagenetic processes. Studies will also cover the effect of the dominant aeolian source of terrigenous particulate matter (the intertropical convergence of the tradewinds, at 5 degree N). Downhole sampling strategy will result in resolution of 7 ky for the past 1 Ma. Interactive behavior of the three major biogenic components (CaCO3, Corg, opal), the aeolion component, and an extensive suite 40 major, trace, and rare earth elements will be assessed.