NOAA/WDS Paleoclimatology - Mayotte - Bimonthly Stable Isotope Data

We examine the relationship between three tropical and two subtropical western Indian Ocean coral oxygen isotope time series to surface air temperatures (SAT) and rainfall over India, tropical East Africa and southeast Africa. We review established relationships, provide new concepts with regard to distinct rainfall seasons, and mean annual temperatures. Tropical corals are coherent with SAT over western India and East Africa at interannual and multidecadal periodicities. The subtropical corals correlate with Southeast African SAT at periodicities of 16-30 years. The relationship between the coral records and land rainfall is more complex. Running correlations suggest varying strength of interannual teleconnections between the tropical coral oxygen isotope records and rainfall over equatorial East Africa. The relationship with rainfall over India changed in the 1970s. The subtropical oxygen isotope records are coherent with South African rainfall at interdecadal periodicities. Paleoclimatological reconstructions of land rainfall and SAT reveal that the inferred relationships generally hold during the last 350 years. Thus, the Indian Ocean corals prove invaluable for investigating land-ocean interactions during past centuries.

本存档古气候学研究数据集可从美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）下属的国家环境信息中心（National Centers for Environmental Information, NCEI）获取，该中心隶属于古气候学世界数据服务中心（World Data Service for Paleoclimatology, WDS）。该数据集关联的NCEI研究分类为珊瑚类。数据集涵盖科摩罗马约特岛区域内的珊瑚及硬海绵（sclerosponges）相关参数。其时间覆盖范围为距今85年至距今-44年（日历年份，以距今（Before Present, BP）为基准）。如需了解参数及研究区位的详细信息，请查阅元数据文档。使用本数据集时，请引用本研究。