Pliocene Climate: Testing the Possible Link Between Global Warmth and Upwelling Intensity Along the California Margin

9809438拉维罗这个项目有两个不同的目标，都是使用从加州边缘收集的上新世沉积物。第一个目标是确定上新世中期方解石的大量堆积是否是浮游生物产量高的结果，而不是溶解的结果。如果是前者，这将意味着在上新世暖期期间更强的上升流和风应力。目标2是寻找在同一时间间隔内上升流的百年到千年级变异性的证据。方解石和有机碳的积累率以及浮游有孔虫的分类组合和稳定同位素组成将在这两项研究中用于评估初级生产力和海表面温度变化。

9809438 Ravelo This project has two separate goals, both using Pliocene sediments collected from the California margin. Objective 1 is to determine whether an interval of high calcite accumulation in the mid-pliocene was a result of high plankton production, rather than an effect of dissolution. If the former, this would imply stronger upwelling and wind stress during the Plioene warm interval. Objective 2 is to look for evidence of century- to millenial-scale variability in upwelling during the same time interval. Accumulation rates of calcite and organic carbon, and taxonomic assemblage and stable isotope composition of planktic foraminifera will be used in both studies to assess primary production and sea surface temperature variations.