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

该研究的目的是在两个Leg 108 ODP站点探索北非沙尘和赤道大西洋生物蛋白石的长期埋藏通量。将重点关注四个原因：日照强迫、北半球冰盖、构造隆起以及赤道和南极环流之间的联系。稳定同位素地层学将提供时间分辨率，并确定蛋白石和尘埃在轨道带（20至100千万年）的通量，并便于与其他气候代用物进行比较。粘土矿物分析将提供非洲干旱的记录。隆升影响将通过使用环流模式进行建模来评估。这项研究是私家侦探卓有成效的调查路线的延续。它进一步追溯了他以前的工作，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.