Constraining The Connection Between The SW Indian Ocean Monsoon And North Atlantic Climate

科学摘要：本提案要求支持测试假设，即阿拉伯海氧气最小带强度的千年变化与与西南印度洋季风相关的上升流有利风的强度变化直接相关。通过测量一个对沉积物聚焦和底部水氧含量变化不敏感的代用物（231Pa/230Th比值），可以追踪季风驱动的生产力的过去变化。这项研究将在巴基斯坦边缘的沉积物岩心上进行。

Science Summary: This proposal requests support to test the hypothesis that the millennial changes in Oxygen Mimimum Zone intensity in the Arabian Sea are directly related to changes in the intensity of upwelling-favorable winds associated with the SW Indian Ocean monsoon. Past changes in monsoon-driven productivity will be traced by measuring a proxy (231Pa/230Th ratio) that is insensitive to sediment focusing and to changes in bottom water oxygen content. The study will be performed on sediment cores from the Pakistan margin.