lio-Pleistocene Aridification of North Africa and ntensification of Equatorial Atlantic Divergence

这项研究的目的是探索北非尘埃和赤道大西洋生物蛋白石在两个108个ODP点的长期埋藏通量。四个原因将集中于：日照强迫、北半球冰盖、构造抬升以及赤道和南极环流之间的联系。稳定的同位素地层学将提供时间分辨率，并确定轨道带(20至100K.Yars)的蛋白石和尘埃的通量。并便于与其他气候指标进行比较。粘土矿物分析将提供非洲干旱的记录。抬升的影响将通过使用大气环流模式进行模拟来评估。这项研究是PI极其富有成效的调查路线的延续。它将他之前的工作进一步追溯到过去，并拓宽了范围。

The objective of the study is to explore the long-term burial fluxes of North African dust and equatorial Atlantic biogenic opal at two Leg 108 ODP sites. Four causal factors will be focused on: insolation forcing, northern Hemisphere ice sheets, tectonic uplift and linkages between equatorial and Antarctic circulation. Stable isotopic stratigraphy will provide time resolution and define the fluxes of opal and dust at orbital band (20 to 100 K.yrs.) and facilitate comparison with other climatic proxies. Clay mineral analysis will provide record of African aridity. Uplift influence will be assessed through modeling using the General Circulation Model. The study is a continuation of the PI's extremely productive line of investigation. It extends his previous work further back in time as well as broadens the scope.