Zinke J, Loveday B R, Reason C J C, Dullo W-C, Kroon D
The University of Western Australia Oceans Institute, School of Earth and Environment, Australian Institute of Marine Science, Nedlands, WA 6009, Australia.
Department of Oceanography, University of Cape Town, Rondebosch, 7701, South Africa.
Sci Rep. 2014 Mar 18;4:4393. doi: 10.1038/srep04393.
The Agulhas Current (AC) is the strongest western boundary current in the Southern Hemisphere and is key for weather and climate patterns, both regionally and globally. Its heat transfer into both the midlatitude South Indian Ocean and South Atlantic is of global significance. A new composite coral record (Ifaty and Tulear massive Porites corals), is linked to historical AC sea surface temperature (SST) instrumental data, showing robust correlations. The composite coral SST data start in 1660 and comprise 200 years more than the AC instrumental record. Numerical modelling exhibits that this new coral derived SST record is representative for the wider core region of the AC. AC SSTs variabilities show distinct cooling through the Little Ice Age and warming during the late 18(th), 19th and 20th century, with significant decadal variability superimposed. Furthermore, the AC SSTs are teleconnected with the broad southern Indian and Atlantic Oceans, showing that the AC system is pivotal for inter-ocean heat exchange south of Africa.
阿古拉斯海流（AC）是南半球最强的西部边界流，对区域和全球的天气及气候模式都至关重要。它向中纬度南印度洋和南大西洋的热量传输具有全球意义。一个新的综合珊瑚记录（伊法蒂和图莱亚尔的块状滨珊瑚）与阿古拉斯海流海面温度（SST）的历史仪器数据相关联，显示出很强的相关性。综合珊瑚SST数据始于1660年，比阿古拉斯海流仪器记录多200年。数值模拟表明，这个新的珊瑚衍生SST记录代表了阿古拉斯海流更广阔的核心区域。阿古拉斯海流SST的变化显示出在小冰期有明显降温，在18世纪后期、19世纪和20世纪有升温，并叠加了显著的年代际变化。此外，阿古拉斯海流SST与广阔的南印度洋和大西洋存在遥相关，表明阿古拉斯海流系统对非洲以南的跨洋热量交换至关重要。
