Assessing the role of the Indian Ocean in global climate change: A paleo-perspective

拟议的研究项目是采取创新和多学科方法的基础，目的是更好地了解印度洋/季风系统在全球气候变化中的作用。需要解决的具体问题是：(1)自1950年以来印度洋的显著变暖是人为变暖的结果，还是在自然的、数十年的气候变化范围内？(2)热带印度洋的海洋表面温度(SST)变化如何影响周围大陆的降雨量？所选择的方法是开发按珊瑚年轮和树木年轮测量的长(长达400年)多核的地球化学替代记录。代理记录将用于重建印度洋气候变异性的两个关键地区：印度尼西亚和东非的海温和降雨量的年际至百年变化。该项目的一个主要成果将是珊瑚年表和树木年轮年表的结合，以记录印度洋海温变化对遥距相连陆地地区降雨量的影响。

The proposed research project forms the basis for an innovative and multi-disciplinary approach aimed at a better understanding of the role of the Indian Ocean/Monsoon system in global climate change. The specific questions to be addressed are: (1) Is the pronounced warming of the Indian Ocean since 1950 a result of anthropogenic warming, or is it within the range of natural, multi-decadal climate variability? (2) How do sea surface temperature (SST) changes in the tropical Indian Ocean impact on rainfall over the surrounding continents? The approach chosen is to develop long (up to 400 years), multi-core geochemical proxy records measured at coral and tree ring chronologies. The proxy records will be used to reconstruct interannual to centennial changes of SST and rainfall in two key areas of Indian Ocean climate variability: Indonesia and East Africa. A major outcome of the project will be the combination of coral and tree ring chronologies to document the impact of Indian Ocean SST changes on rainfall over teleconnected land areas.