Severe Drought Conditions in Northern East Asia During the Early Pliocene Caused by Weakened Pacific Meridional Temperature Gradient
Severe Drought Conditions in Northern East Asia During the Early Pliocene Caused by Weakened Pacific Meridional Temperature Gradient
复制标题
太平洋经向温度梯度减弱导致上新世早期东亚北部严重干旱
DOI：
10.1029/2022gl098813
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发表时间：
2022-07
期刊：
影响因子：
--
通讯作者：
Hongxuan Lu
中科院分区：
文献类型：
--
作者：
Yanhong Zheng;Alexey V. Fedorov;Natalie J. Burls;Rui Zhang;Chris Brierley;Zhengkun Fang;Xuefeng Yu;Feng Xian;Hongxuan Lu
在上新世东亚水文气候的演变-未来温室气候的一个潜在的模拟-仍然是高度不确定的。在这里，我们重建的水文气候变化的北方中国在这一时期。我们的研究结果揭示了以前没有记录的严重干旱条件，持续到上新世早期，其幅度明显大于其他记录。利用一个广泛的层次的气候模拟，我们发现，减少太平洋纬向海表面温度（SST）梯度有特别强烈的影响，在北方中国降水，这表明它在维持干旱条件在上新世早期的关键作用。太平洋纬向SST梯度减弱，通过减少大气中来自海洋的水汽输送，增强内陆的干旱，从而减弱东亚夏季风降水。我们的研究结果突出了热带海洋对热带外水文循环的根本控制。
The evolution of hydroclimate in East Asia during the Pliocene—a potential analog of the future greenhouse climate—remains highly uncertain. Here we reconstruct changes in the hydroclimate of Northern China during this epoch. Our results reveal previously undocumented severe drought conditions that persisted through the early Pliocene with a significantly greater magnitude than suggested by other records. Using a broad hierarchy of climate simulations, we find that reduction in the Pacific meridional sea surface temperature (SST) gradient has particularly strong impacts on precipitation over Northern China, which suggests its key role in maintaining drought conditions during the early Pliocene. The weaker Pacific meridional SST gradient causes the weakening of the East Asian summer monsoon precipitation over this region via a reduction of atmospheric northward moisture transport from the ocean, which enhances aridity inland. Our results highlight the fundamental control of the tropical ocean on the extra-tropical hydrological cycle.
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影响因子：
5.3
作者：
Jiayi Lu;Huan Yang;M. Griffiths;N. Burls;G. Xiao;Jilong Yang;J. K. Wang;K. Johnson;S. Xie
通讯作者：
Jiayi Lu;Huan Yang;M. Griffiths;N. Burls;G. Xiao;Jilong Yang;J. K. Wang;K. Johnson;S. Xie
绿色撒哈拉的降雨状况。
影响因子：
13.6
作者：
Tierney JE;Pausata FS;deMenocal PB
通讯作者：
deMenocal PB
影响因子：
4.9
作者：
Burls, N. J.;Fedorov, A. V.
通讯作者：
Fedorov, A. V.
影响因子：
64.8
作者：
Fedorov, A. V.;Brierley, C. M.;Ravelo, A. C.
通讯作者：
Ravelo, A. C.
影响因子：
56.9
作者：
M. Wara;A. Ravelo;M. Delaney
通讯作者：
M. Wara;A. Ravelo;M. Delaney