Indonesian Throughflow drove Australian climate from humid Pliocene to arid Pleistocene
Indonesian Throughflow drove Australian climate from humid Pliocene to arid Pleistocene
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DOI：
10.1002/2017gl072977
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发表时间：
2016-12
影响因子：
5.2
通讯作者：
B. Christensen;W. Renema;J. Henderiks;D. De Vleeschouwer;J. Groeneveld;I. Castañeda;L. Reuning;K. Bogus;G. Auer;T. Ishiwa;C. McHugh;S. Gallagher;C. Fulthorpe
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作者：
B. Christensen;W. Renema;J. Henderiks;D. De Vleeschouwer;J. Groeneveld;I. Castañeda;L. Reuning;K. Bogus;G. Auer;T. Ishiwa;C. McHugh;S. Gallagher;C. Fulthorpe
晚中新世至中更新世的沉积代用记录显示，澳大利亚西北部在550万年（Ma）时经历了从干燥到潮湿的气候条件的突然转变，可能全年都有降雨，但在大约3.3 Ma后，气候转向季节性降水。印度尼西亚季风气流的逐渐收缩可能降低了大陆湿度，并将澳大利亚西北部气候的控制权从太平洋转移到印度洋，导致更干燥的条件被季风降水打断。西北尘埃路径和完全建立的季节性和轨道控制的降水到位约2.4马，以及后北方半球冰川作用的加强。从潮湿到干旱的转变是由太平洋和印度洋环流的变化以及受新兴海洋大陆影响的区域大气水分输送驱动的。我们的结论是，海洋大陆是配电盘调制热带和高纬度气候系统之间的遥相关。
Late Miocene to mid‐Pleistocene sedimentary proxy records reveal that northwest Australia underwent an abrupt transition from dry to humid climate conditions at 5.5 million years (Ma), likely receiving year‐round rainfall, but after ~3.3 Ma, climate shifted toward an increasingly seasonal precipitation regime. The progressive constriction of the Indonesian Throughflow likely decreased continental humidity and transferred control of northwest Australian climate from the Pacific to the Indian Ocean, leading to drier conditions punctuated by monsoonal precipitation. The northwest dust pathway and fully established seasonal and orbitally controlled precipitation were in place by ~2.4 Ma, well after the intensification of Northern Hemisphere glaciation. The transition from humid to arid conditions was driven by changes in Pacific and Indian Ocean circulation and regional atmospheric moisture transport, influenced by the emerging Maritime Continent. We conclude that the Maritime Continent is the switchboard modulating teleconnections between tropical and high‐latitude climate systems.