In 2003, a climate extreme accompanying a wet and cool summer over East Asia was recorded over the East Asian countries including central China, Korea, and Japan. A possible relation of this record-breaking summer in East Asia to above-normal snowfall over the Tibetan Plateau in spring has been investigated using the National Centers for Environmental Prediction (NCEP) global and regional models. The changes in the simulated East Asian summer monsoon circulations in response to snow anomalies over Tibet are highlighted. The results from both global and regional model experiments suggest that above-normal snowfall over the Tibetan Plateau in May induces a weakening of the Tibetan high, which leads to the formation of favorable upper-level circulations accompanying cyclonic circulation anomalies covering the East Asian region in summer. These circulation anomalies in response to the snow anomalies over the plateau are more robust and closer to what was observed in the regional than in the global model results. The sensitivity experiments also show that the precipitation and lower-level circulation anomalies in summer, caused by the snow anomalies in spring, influence the above-normal precipitation in the lower reaches of the Yangtze River basin, as revealed in previous observational studies. However, the experiments do not fully explain the observed signals in Korea and Japan since the spring snow anomaly over Tibet plays a role in weakening the western Pacific subtropical high in the simulated summer, whereas in reality the intensity of the high was stronger than normal in 2003.
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Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Int Pacific Res Ctr, Honolulu, HI 96822 USAUniv Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Int Pacific Res Ctr, Honolulu, HI 96822 USA
Souma, Kazuyoshi
Wang, Yuqing
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Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Int Pacific Res Ctr, Honolulu, HI 96822 USAUniv Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Int Pacific Res Ctr, Honolulu, HI 96822 USA
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Seoul Natl Univ, Sch Earth & Environm Sci, Atmospher Sci Program, Seoul 151742, South KoreaSeoul Natl Univ, Sch Earth & Environm Sci, Atmospher Sci Program, Seoul 151742, South Korea
Lee, DK
Kang, HS
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Seoul Natl Univ, Sch Earth & Environm Sci, Atmospher Sci Program, Seoul 151742, South KoreaSeoul Natl Univ, Sch Earth & Environm Sci, Atmospher Sci Program, Seoul 151742, South Korea
Kang, HS
Min, KH
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Seoul Natl Univ, Sch Earth & Environm Sci, Atmospher Sci Program, Seoul 151742, South KoreaSeoul Natl Univ, Sch Earth & Environm Sci, Atmospher Sci Program, Seoul 151742, South Korea
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Chinese Acad Meteorol Sci, Beijing, Peoples R China
China Meteorol Adm, Natl Climate Ctr, Beijing, Peoples R ChinaChinese Acad Meteorol Sci, Beijing, Peoples R China
Zhang, Ruonan
Zhang, Renhe
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Chinese Acad Meteorol Sci, Beijing, Peoples R China
CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R ChinaChinese Acad Meteorol Sci, Beijing, Peoples R China
Zhang, Renhe
Zuo, Zhiyan
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Chinese Acad Meteorol Sci, Beijing, Peoples R ChinaChinese Acad Meteorol Sci, Beijing, Peoples R China
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China Meteorol Adm, Inst Plateau Meteorol, Chengdu 610072, Peoples R China
China Meteorol Adm, Natl Climate Ctr, Beijing 100081, Peoples R ChinaChina Meteorol Adm, Inst Plateau Meteorol, Chengdu 610072, Peoples R China
Xu, Li
Li, Yueqing
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China Meteorol Adm, Inst Plateau Meteorol, Chengdu 610072, Peoples R ChinaChina Meteorol Adm, Inst Plateau Meteorol, Chengdu 610072, Peoples R China
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Chinese Acad Sci, Inst Atmospher Phys, Climate Change Res Ctr, Beijing, Peoples R ChinaChinese Acad Sci, Inst Atmospher Phys, Climate Change Res Ctr, Beijing, Peoples R China
Guo, Zhun
Zhou, Tianjun
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Chinese Acad Sci, Inst Atmospher Phys, LASG, Beijing, Peoples R ChinaChinese Acad Sci, Inst Atmospher Phys, Climate Change Res Ctr, Beijing, Peoples R China
Zhou, Tianjun
Wang, Minghuai
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Nanjing Univ, Inst Climate & Global Change Res, Nanjing, Peoples R China
Nanjing Univ, Sch Atmospher Sci, Nanjing, Peoples R ChinaChinese Acad Sci, Inst Atmospher Phys, Climate Change Res Ctr, Beijing, Peoples R China
Wang, Minghuai
Yang, Ben
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Nanjing Univ, Inst Climate & Global Change Res, Nanjing, Peoples R China
Nanjing Univ, Sch Atmospher Sci, Nanjing, Peoples R ChinaChinese Acad Sci, Inst Atmospher Phys, Climate Change Res Ctr, Beijing, Peoples R China
Yang, Ben
Wu, Bo
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Chinese Acad Sci, Inst Atmospher Phys, LASG, Beijing, Peoples R ChinaChinese Acad Sci, Inst Atmospher Phys, Climate Change Res Ctr, Beijing, Peoples R China
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Pusan Natl Univ, Div Earth Environm Syst, Pusan 609735, South Korea
Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R ChinaPusan Natl Univ, Div Earth Environm Syst, Pusan 609735, South Korea
Ding, Ruiqiang
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Ha, Kyung-Ja
Li, Jianping
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Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R ChinaPusan Natl Univ, Div Earth Environm Syst, Pusan 609735, South Korea