A Unique Paleomeasure of Turbulent Boundary Layer Heat Content: Florisphaera Profunda

该项目的目的是测量热带和亚热带海洋湍流边界层热含量的古海洋学变率。一种新的营养线深度的测量方法，作为温跃层深度的替代品，是球石藻物种Florisphaera profunda。这种海藻局限于较低的绿化带，高营养，温度为10摄氏度。该研究将定义和测试这一措施。目标包括：(1)提高热带大西洋深孔菌的生物生态学定义。(2)记录近20万年赤道大西洋环流线的变化(3)利用ODP站点662A的F.profunda确定250万年全球气候变化是否改变了环流线对岁差强迫的响应（310 ~ 190万年）。(4)圈定了近20万年来北大西洋副热带环流极向边界的位置和表达。

The objective of the project is to measure the paleoceanographic variability of heat content in the Turbulent Boundary Layer of the tropical and subtropical oceans. A new measure of the nutricline, and by proxy, thermocline, depth is the coccolithophorid species Florisphaera profunda. This marine algae is restricted to the lower euphotic zone, high nutrients, and temperatures 10C. The research will define and test this measure. The goals include (1) Improve bioecologic definition of F. profunda in the tropical Atlantic. (2) Document changes in the equatorial Atlantic nutricline for the last 200,000 years (3) Determine if the change in global climate at 2.5 Million years altered the nutricline response to precessional forcing using F.profunda in ODP site 662A for the interval 3.1 to 1.9 Million years. (4) Delineate the position and expression of the poleward boundary of the North Atlantic subtropical gyre for the last 200,000 years.