Impact of global SST on decadal shift of East Asian summer climate
Impact of global SST on decadal shift of East Asian summer climate
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DOI：
10.1007/s00376-009-0192-z
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发表时间：
2009-03
影响因子：
5.8
通讯作者：
Jianjian Fu;Shuanglin Li;D. Luo
中科院分区：
文献类型：
--
作者：
Jianjian Fu;Shuanglin Li;D. Luo
20世纪70年代末前后，东亚地区经历了显著的年代际气候变化，中东部长江流域洪水增多，华北地区干旱加剧。全球海温变化是否在这一转变中发挥了作用尚不清楚。在本研究中，通过大气环流模式（AGCM） GFDL AM2的集合实验研究了这一问题，因为一个验证表明该模式很好地模拟了观测到的东亚夏季风（EASM）。结果表明，年代际全球海温变化可能在这一气候变化中发挥了重要作用。对相关大气环流的进一步考察表明，这些结果在物理上是合理的。
East Asia experienced a significant interdecadal climate shift around the late 1970s, with more floods in the valley of the Yangtze River of central-eastern China and more severe drought in North China since then. Whether global SST variations have played a role in this shift is unclear. In the present study, this issue is investigated by ensemble experiments of an atmospheric general circulation model (AGCM), the GFDL AM2, since one validation reveals that the model simulates the observed East Asian Summer Monsoon (EASM) well. The results suggest that decadal global SST variations may have played a substantial role in this climate shift. Further examination of the associated atmospheric circulation shows that these results are physically reasonable.