Western Indian Ocean marine and terrestrial records of climate variability: a review and new concepts on land–ocean interactions since AD 1660
Western Indian Ocean marine and terrestrial records of climate variability: a review and new concepts on land–ocean interactions since AD 1660
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DOI：
10.1007/s00531-008-0365-5
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发表时间：
2009-02
影响因子：
2.3
通讯作者：
J. Zinke;M. Pfeiffer;O. Timm;W.-Ch. Dullo;G. A. Brummer
中科院分区：
文献类型：
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作者：
J. Zinke;M. Pfeiffer;O. Timm;W.-Ch. Dullo;G. A. Brummer
我们研究了三个热带和两个副热带西印度洋珊瑚氧同位素时间序列与印度、热带东非和东非东南部地区地面气温(SAT)和降水的关系。我们回顾了已建立的关系，提供了关于不同雨季和年平均温度的新概念。热带珊瑚与印度西部和东非的SAT在年际和数十年的周期上是一致的。亚热带珊瑚与东南部非洲SAT的相关周期为16-30年。珊瑚记录与陆地降雨量之间的关系更为复杂。连续相关表明，热带珊瑚氧同位素记录和赤道东非降雨量之间的年际遥相关程度不同。上世纪70年代，印度的降雨量与气候的关系发生了变化。副热带氧同位素记录与南非降水在年代际周期上是一致的。对陆地降雨量和SAT的古气候学重建表明，在过去的350年里，这种推断的关系通常成立。因此，印度洋珊瑚被证明对于研究过去几个世纪的陆地-海洋相互作用是非常宝贵的。
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.