Vegetation and Ocean Feedbacks on the Asian Climate Response to the Uplift of the Tibetan Plateau
Vegetation and Ocean Feedbacks on the Asian Climate Response to the Uplift of the Tibetan Plateau
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DOI：
10.1029/2019jd030503
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发表时间：
2019-06
期刊：
影响因子：
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通讯作者：
Ran Zhang;D. Jiang;Zhongshi Zhang
中科院分区：
文献类型：
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作者：
Ran Zhang;D. Jiang;Zhongshi Zhang
青藏高原的生长是影响新生代亚洲气候演变的重要因素之一。然而，植被和海洋反馈是否在亚洲气候对TP升高的响应中起着特定的作用仍不清楚。在这里，我们通过使用共同体地球系统模型进行的一系列数值实验来研究这个问题。结果表明，植被和海洋反馈对亚洲气候变化的影响是不同的，但与热力结构的调整有着内在的联系。植被反馈导致东亚和南亚地区年降水量偏多，南亚至西北太平洋地区的亚洲冬季季风风和冬季对流层中高层西风减弱。相比之下，海洋反馈导致年降水亏损，特别是孟加拉湾、马来半岛和南中国海的大部分地区，亚洲夏季风和冬季季风风减弱，冬季南亚至西北太平洋对流层中高层西风增强。这些结果突出了植被和海洋反馈的重要性，并进一步有助于更好地了解古气候对TP上升的响应。
The growth of the Tibetan Plateau (TP) is one of the important forcings acting on the evolution of the Asian climate during the Cenozoic. However, whether vegetation and ocean feedbacks play a specific role in the Asian climate response to TP uplift remains unclear. Here we investigate this issue through a set of numerical experiments with the Community Earth System Model. The results indicate that vegetation and ocean feedbacks have important but different effects on the Asian climate change in association with TP uplift, which are intrinsically related to the adjustment of thermal structure. The vegetation feedback leads to excess annual precipitation in East China and South Asia and a weakening of the Asian winter monsoon winds and winter middle‐ and high‐level tropospheric westerly winds from South Asia to the northwestern Pacific. By comparison, the ocean feedback induces a deficit of annual precipitation particularly in most areas of the Bay of Bengal, Malay Peninsula, and the South China Sea, a weakening of the Asian summer and winter monsoon winds, and a strengthening of the winter middle‐ and high‐level tropospheric westerly winds from South Asia to the northwestern Pacific. These results highlight the importance of vegetation and ocean feedbacks and further facilitate a better understanding of the paleoclimatic response to the uplift of the TP.