Natural variability of East Asian summer monsoon simulated by NCAR Cam3 model
Natural variability of East Asian summer monsoon simulated by NCAR Cam3 model
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DOI：
10.1117/12.825428
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发表时间：
2009-08
期刊：
影响因子：
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通讯作者：
G. Zeng;Wei‐Chyung Wang;Zhaobo Sun;Zhaohui Lin
中科院分区：
文献类型：
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作者：
G. Zeng;Wei‐Chyung Wang;Zhaobo Sun;Zhaohui Lin
利用NCARCam 3大气环流模式对全球海温和海冰的100年模拟资料，研究了东亚夏季风（EASM）内部大气的自然变率。结果表明：东亚夏季风内部大气的自然变率主要表现为3-7年的年际周期和显著的年代际变化：东亚夏季风弱年，亚洲大陆海平面气压升高，日本和东亚沿岸海平面气压降低; 500 hPa高度场在欧洲地区为负距平，在里海地区为正距平，在日本及以东的太平洋地区为负距平，从而导致类似欧盟的遥相关波列和几乎v. v.的强东亚夏季风的一年。同时还发现，模拟的东亚夏季风与500 hPa类EU型遥相关波列在同步的基础上有着密切的联系。
Based on the 100-yr simulations from seasonal cycle global SST and sea ice driven by NCAR Cam3 atmospheric general circulation model, the natural variability of East Asian summer monsoon (EASM) in the internal atmosphere is investigated. Results suggest that the natural variability of EASM in the internal atmosphere displays 1) mainly distinct 3-7-yr interannual period and marked interdecadal variation; 2) in the year of weak EASM, sea level pressure (SLP) in Asian continent increases, with decreased SLP around Japan and in eastern Asian littorals; the 500 hPa height field exhibits negative anomalies over Europe, positive anomalies about the Caspian Sea and negative anomalies around Japan and in the Pacific area to the east, thus leading to an EU-like teleconnection wavetrain and almost v.v. for the year of strong EASM. It is also found that the simulated EASM has a close relation to the EU-like teleconnection wavetrain at 500 hPa on a synchronous basis.