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基于1983–2011年月总降水量、环流和海温的再分析资料,给出了20世纪90年代末东亚夏季降水的年代际调整的区域特征,及其对应的大气环流内部过程和可能的海温外强迫的年代际变化. 研究结果表明,在20世纪90年代末期东亚北部夏季降水比东亚南部夏季降水由湿向干的表现更为明显,东亚南部地区夏季降水则是在20世纪90年代初和21世纪初发生年代际的转折. 此外,东亚地区夏季的500 hPa高度场、850 hPa 风场、U200风场、水汽输送场和东亚太平洋遥相关型指数和东亚夏季风指数等在20世纪90年代末期也表现出明显的年代际变化特征. 进而从大气内部过程的角度验证了20世纪90年代末东亚夏季降水发生的年代际调整. 与此同时,北太平洋和西太平洋海表温度表现出由偏低向偏高的转变,这可能是导致20世纪90年代末期东亚夏季气候年代际变化的重要外部成因之一.Based on the analyses of monthly precipitation, National Centers Environmental Prediction/University Corporation for Atmospheric Research reanalysis dataset, and 2°×2° sea surface temperature (sst) data of extended reconstructed sea surface temperature during 1983-2011, we discuss the interdecadal variations of precipition around late-1990s in East Asia, the contributions of the atmospheric internal dynamic processes, and the extra-forcing factors such as sst that presents interdecal characteristics corresponding to the results obtained by using regress analysis. The results show that the interdecadal variations of the summer rainfall over Northern East Asia around late-1990s were more obvious than over Southern East Asia, and the summer rainfall over Southern East Asia experienced a notable interdecadal change around early-1990s and early-2000s. The summer geopotential height at 500 hPa, the summer wind at 850 hPa, the summer U-wind at 200 hPa, the water vapor transportation field, the index of EAP and EASM all have the notable characteristics of the interdecadal variations, which further validate the interdecadal change of precipition of late-1990s from the angle of the atmospheric internal dynamic process. At the same time the sea surface temperature interdecadal anomalies of North Pacific and West Pacific may also be one of the important reasons for causing the interdecadal change over East Asia of the late-1990s.
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Keywords:
- precipitation pattern /
- interdecadal variation /
- circulation /
- extra-forcing factor
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[1] Dai X G, Wang P, Chou J F 2004 Prog. Nat. Sci. 14 73
[2] Feng G L, Dong W J 2003 Chin. Phys. 13 413
[3] Gong Z Q, Wang X J, Zhi R, Feng G L 2009 Acta Phys. Sin. 58 4342 (in Chinese) [龚志强, 王晓娟, 支蓉, 封国林 2009 物理学报 58 4342]
[4] Huang J P, Yi Y H, Wang S W, Chou J F 1993 Q. J. Meteorol. Soc. 119 547
[5] Dai X G, Wang P, Zhang K J 2012 Chin. Phys. B 21 119201
[6] Kwon M H, Jhun J G, Ha K J 2007 Geophys. Res. Lett. 34 L21706
[7] Yan Z W 1992 Chin. J. Atmos. Sci. 16 111 (in Chinese) [严中伟 1992 大气科学 16 111]
[8] Ma J J, Gao X Q 2006 Plateau Meteorology 25 893 (in Chinese) [马京津, 高晓清 2006 高原气象 25 893]
[9] Huang R H, Xu Y H, Zhou L T 1999 Plateau Meteorology 18 465 (in Chinese) [黄荣辉, 徐予红, 周连童 1999 高原气象 18 465]
[10] Ding Y H, Wang Z Y, Sun Y 2008 Int. J. Climatol. 28 1139
[11] Zhang Q Y, We J, Tao S Y 2003 Climatic and Environmental Research 8 307
[12] Wang H 2001 Adv. Atmos. Sci. 18 376
[13] Shi Y F, Shen Y P, Li D L, Zhang G W, Ding Y J 2003 Quaternary Sci. 23 152
[14] Shi Y F, Shen Y P, Kang E, Li D L, Ding Y J, Zhang G W, Hu R J 2007 Climatic Change 80 379
[15] Huang R H, Gu L, Chen J L, Huang G 2008 Chin. J. Atmospheric Sci. 32 691 (in Chinese) [黄荣辉, 顾雷, 陈际龙, 黄刚 2008 大气科学 32 691]
[16] Zhang R, Wu B, Zhao P, Han J 2008 Acta Meteor. Sin. 22 435
[17] Qian W H, Lin X, Zhu Y F, Xu Y, Fu J L 2007 Climatic Change 84 167
[18] Zhang Q Y, L J M, Yang L M, Wei J, Peng J B 2007 Chin. J. Atmos. Sci. 31 1290 (in Chinese) [张庆云, 吕俊梅, 杨莲梅, 卫捷, 彭京备 2007 大气科学 31 1290]
[19] Huang R H, Chen J J, Liu Y 2011 Chin. J. Atmos. Sci. 35 589 (in Chinese) [黄荣辉, 陈际龙, 刘永 2011 大气科学 35 589]
[20] Zhu Y, Wang H, Zhou W, Ma J 2010 Climate Dynamics 36 1463
[21] Ye H, Lu R 2011 J. Climate 24 2271
[22] Gong Z Q, Zhao J H, Feng G L 2013 Acta Phys. Sin. 62 099205 (in Chinese) [龚志强, 赵俊虎, 封国林 2013 物理学报 62 099205]
[23] Yang L M, Zhang Q Y 2007 Chin. J. Geophys. 50 412 (in Chinese) [杨莲梅, 张庆云 2007 地球物理学报 50 412]
[24] Yang P, Hou W, Feng G L 2012 Chin. Phys. B 21 019201
[25] Gong Z Q, Wang X J, Zhi R, Feng G L 2011 Chin. Phys. B 20 079201
[26] Wang X J, Zhi R, He W P, Gong Z Q 2012 Chin. Phys. B 21 029201
[27] Li C Y, Liao Q H 1996 Climatic and Environmental Research 1 124 (in Chinese) [李崇银, 廖清海 1996 气候与环境研究 1 124]
[28] Xu J J, Wang D X 2000 Acta Oceanol. Sin. 22 34 (in Chinese) [徐建军, 王东晓 2000 海洋学报 22 34]
[29] Li C Y 1998 Adv. Atmos. Sci. 15 31
[30] Deng W T, Sun Z B, Zeng G 2009 Chin. J. Atmos. Sci. 33 835 (in Chinese) [邓伟涛, 孙照渤, 曾刚 2009 大气科学 33 835]
[31] Huang R, Zhou L, Chen W 2003 Adv. Atmos. Sci. 20 55
[32] Liu Y 2012 Ph. D. Dissertation (Beijing: Chinese Academy of Sciences) (in Chinese) [刘永 2012 博士学位 (北京: 中国科学院)]
[33] Huang J, Yi Y, Wang S, Chou J 1993 Q. J. Meteorol. Soc. 119 547
[34] Feng G L, Gong Z Q, Zhi R, Zhang D Q 2008 Chin. Phys. B 17 2745
[35] He W P, Feng G L, Wu Q, Wan S Q, Chou J F 2008 Nonlinear Processes in Geophysics 15 601
[36] Huang J P, Yi Y H 1991 Sci. China B 34 1246
[37] Huang J P, Wang S W 1992 Sci. China B 35 207
[38] Li H M, Dai A G, Zhou T J, Lu J 2010 Climate Dyna- mics 34 501
[39] Si D, Ding Y H 2013 J. Climate 26 7622
[40] Wei F Y, Zhang X G 1988 Meteorological Monthly 14 15 (in Chinese) [魏凤英, 张先恭 1988 气象 14 15]
[41] Gong Z Q, Feng G L, Wan S Q, Li J P 2006 Acta Phys. Sin. 55 477 (in Chinese) [龚志强, 封国林, 万仕全, 李建平 2006 物理学报 55 477]
[42] Chen R D, Wen Z P, Lu R Y, Wu L J 2012 Chin. J. Atmos. Sci. 36 974 (in Chinese) [陈锐丹, 温之平, 陆日宇, 吴丽姬 2012 大气科学 36 974]
[43] Shi N, Lu J J, Zhu Q G 1996 Journal of Nanjing Institute of Meteorology 19 168 (in Chinese) [施能, 鲁建军, 朱乾根 1996 南京气象学院学报 19 168]
[44] Huang G 2004 Adv. Atmos. Sci. 21 41
[45] Shi N, Zhu Q G, Wu B G 1996 Chin. J. Atmos. Sci. 20 575 (in Chinese) [施能, 朱乾根, 吴彬贵 1996 大气科学 20 575]
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