全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
大气科学  2015 

东亚夏季风异常活动的多模态特征:不同再分析资料的比较分析

DOI: 10.3878/j.issn.1006-9895.1404.13326

Keywords: 东亚夏季风 空间多模态 大气环流异常 夏季降水 比较分析

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用1979~2002年ERA-40、ERA interim、JRA-25和NCEP-DOE AMIP-Ⅱ(简称为NCEP-2)再分析资料,采用扩展经验正交分解(EEOF)、相关分析等方法,对比分析了不同资料所揭示的东亚夏季风异常活动的多模态特征,在此基础上探讨了东亚夏季风异常活动各模态对应的大气环流异常分布型及其与中国夏季降水的可能联系。结果表明:(1)四套再分析资料所揭示的东亚夏季风异常活动均存在三种差异显著的空间模态,且各套资料对东亚夏季风异常活动空间多模态特征具有很好的一致性,仅NCEP-2的结果与其他资料略有差异。(2)第一模态体现了夏季风年际异常在中国南方和北方的反相变化,并具有显著的3~6年和准8年周期;与正(负)时间系数相对应,850 hPa风场、500 hPa高度场、SLP均显示东亚沿岸存在从西北太平洋经过日本以南到达鄂霍次克海的“-+-”(“+-+”)经向三极型结构;相应的降水变化在长江中下游为显著的负(正)异常,而在我国东北东部、东南沿海及云南西部则为正(负)异常。(3)第二模态反映了夏季风活动主导模态的一致性变化且在1993年左右发生年代际转折,并呈现准12年周期的强弱交替分布。当对应的时间系数为正(负)时,850 hPa风场在环贝加尔湖地区受强大的异常反气旋(气旋)控制;500 hPa高度场上,中高纬地区表现为异常的纬向波列结构,具体表现为起源于欧洲大陆西部经西西伯利亚平原向东南方向延伸至东北亚地区的“+-+”(“-+-”)的波列;SLP在我国大陆主要为正(负)异常,东亚夏季风整体减弱(加强);对应的夏季降水异常场呈现“南涝北旱”(“南旱北涝”)的分布形势。(4)第三模态表明了夏季风异常活动的东西反相变化,且有12~16年的准周期变化。对应正(负)的时间系数,115°E 以东地区盛行异常偏南(北)风,而115°E 以西地区主要盛行异常偏北(南)风;500 hPa高度场、SLP均显示出东亚沿岸地区、鄂霍次克海至日本以南洋面的“-+”(“+-”)波列以及欧亚大陆北部的准纬向遥相关波列;夏季降水在我国大部分地区偏多(偏少),显著变化主要位于黄淮及附近地区

References

[1]  Annamalai H, Slingo J M, Sperber K R, et al. 1999. The mean evolution and variability of the Asian summer monsoon: Comparison of ECMWF and NCEP-NCAR reanalyses [J]. Mon. Wea. Rev., 127 (6): 1157-1186.
[2]  Bromwich D H, Fogt R L. 2004. Strong trends in the skill of the ERA-40 and NCEP-NCAR reanalyses in the high and midlatitudes of the Southern Hemisphere, 1958-2001 [J]. J. Climate, 17 (23): 4603-4619.
[3]  陈兴芳, 宋文玲. 1994. 我国初夏降水的短期气候变化和成因分析 [J]. 气象学报, 20 (10): 17-20. Chen Xingfang, Song Wenling. 1994. The short-term climatic change of precipitation and its formation cause in early summer in China [J]. Acta Meteorologica Sinica (in Chinese), 20(10): 17-20.
[4]  Chang C P, Zhang Y S, Li T M. 2000. Interannual and interdecadal variations of the East Asian summer monsoon and tropical Pacific SSTs. Part I: Roles of the subtropical ridge [J]. J. Climate, 13 (24): 4310-4325.
[5]  Dee D P, Uppala S M, Simmons A J, et al. 2011. The ERA-Interim reanalysis: Configuration and performance of the data assimilation system [J]. Quart. J. Roy. Meteor. Soc., 137 (656): 553-597.
[6]  Ding Y H, Wang Z Y, Sun Y. 2008. Inter-decadal variation of the summer precipitation in East China and its association with decreasing Asian summer monsoon. Part I: Observed evidences [J]. International Journal of Climatology, 28 (9): 1139-1161.
[7]  Ding Y H, Sun Y, Wang Z Y, et al. 2009. Inter-decadal variation of the summer precipitation in China and its association with decreasing Asian summer monsoon. Part II: Possible causes [J]. International Journal of Climatology, 29 (13): 1926-1944.
[8]  Duan A M, Wu G X. 2008. Weakening trend in the atmospheric heat source over the Tibetan Plateau during recent decades. Part I: Observations [J]. J. Climate, 21 (13): 3149-3164.
[9]  邓伟涛, 孙照渤, 曾刚, 等. 2009. 中国东部夏季降水型的年代际变化及其与北太平洋海温的关系 [J]. 大气科学, 33 (4): 835-846. Deng Weitao, Sun Zhaobo, Zeng Gang, et al. 2009. Interdecadal variation of summer precipitation pattern over eastern China and its relationship with the North Pacific SST [J]. Chinese J. Atmos. Sci. (in Chinese), 33(4): 835-846.
[10]  高由禧, 徐淑英, 郭其蕴, 等. 1962. 东亚季风的若干问题 [M]. 北京: 科学出版社, 12-27. Gao Youxi, Xu Shuying, Guo Qiyun, et al. 1962. Some Problems about East Asian Monsoon (in Chinese) [M]. Beijing: Science Press, 12-27.
[11]  郭其蕴. 1983. 东亚夏季风强度指数及其变化的分析 [J]. 地理学报, 38 (3): 207-217. Guo Qiyun. 1983. The summer monsoon intensity index in East Asia and its variation [J]. Acta Geographica Sinica (in Chinese), 38(3): 207-217.
[12]  Goswami B N, Krishnamurthy V, Annmalai H. 1999. A broad-scale circulation index for the interannual variability of the Indian summer monsoon [J]. Quart. J. Roy. Meteor. Soc., 125 (554): 611-633.
[13]  Hahn D G, Manabe S. 1975. The role of mountains in the south Asian monsoon circulation [J]. J. Atmos. Sci., 32 (8): 1515-1541.
[14]  黄荣辉, 李维京. 1988. 夏季热带西太平洋上空的热源异常对东亚上空副热带高压的影响及其物理机制 [J]. 大气科学, 12 (S1): 107-116. Huang Ronghui, Li Weijing. 1988. Influence of heat source anomaly over the western tropical Pacific on the subtropical high over East Asia and its physical mechanism [J]. Chinese J. Atmos. Sci. (in Chinese), 12 (S1): 107-116.
[15]  黄荣辉, 孙凤英. 1994. 热带西太平洋暖池上空对流活动对东亚夏季风季节内变化的影响 [J]. 大气科学, 18 (4): 456-465. Huang Ronghui, Sun Fengying. 1994. Impact of the convective activities over the western tropical pacific warm pool on the intraseasonal variability of the East Asian summer monsoon [J]. J. Atmos. Sci. (in Chinese), 18 (4): 456-465.
[16]  黄荣辉, 黄刚, 任保华. 1999. 东亚夏季风的研究进展及其需进一步研究的问题 [J]. 大气科学, 23 (2): 129-141. Huang Ronghui, Huang Gang, Ren Baohua. 1999. Advances and problems needed for further investigation in the studies of the East Asian summer monsoon [J]. Chinese J. Atmos. Sci. (in Chinese), 23 (2): 129-141.
[17]  Huang R H, Zhou L T, Chen W. 2003. The progresses of recent studies on the variabilities of the East Asian monsoon and their causes [J]. Adv. Atmos. Sci., 20 (1): 55-69.
[18]  Huang R H, Gu L, Zhou L T, et al. 2006. Impact of the thermal state of the tropical western Pacific on onset date and process of the South China Sea summer monsoon [J]. Adv. Atmos. Sci., 23 (6): 909-924.
[19]  黄荣辉, 陈际龙, 刘永. 2011. 我国东部夏季降水异常主模态的年代际变化及其与东亚水汽输送的关系 [J]. 大气科学, 35 (4): 589-606. Huang Ronghui, Chen Jilong, Liu Yong. 2011. Interdecadal variation of the leading modes of summertime precipitation anomalies over eastern China and its association with water vapor transport over East Asia [J]. Chinese J. Atmos. Sci. (in Chinese), 35 (4): 589-606.
[20]  Huang R H, Chen J L, Wang L, et al. 2012. Characteristics, processes, and causes of the spatio-temporal variabilities of the East Asian monsoon system [J]. Adv. Atmos. Sci., 29 (5): 910-942.
[21]  黄荣辉, 刘永, 冯涛. 2013. 20 世纪90 年代末中国东部夏季降水和环流的年代际变化特征及其内动力成因 [J]. 科学通报, 58 (8): 617-628. Huang Ronghui, Liu Yong, Feng Tao. 2013. Interdecadal change of summer precipitation over Eastern China around the late-1990s and associated circulation anomalies, internal dynamical causes [J]. Chin. Sci. Bull., 58 (12): 1339-1349.
[22]  Huang G, Hu K M, Xie S P. 2010. Strengthening of tropical Indian Ocean teleconnection to the Northwest Pacific since the mid-1970s: An atmospheric GCM study [J]. J. Atmos. Sci., 23 (19): 5294-5304.
[23]  Huang G, Y Liu, R H Huang. 2011. The interannual variability of summer rainfall in the arid and semiarid regions of northern China and its association with the Northern Hemisphere circumglobal teleconnection [J]. Adv. Atmos. Sci., 28 (2): 257-268.
[24]  琚建华, 钱诚, 曹杰. 2005. 东亚夏季风的季节内振荡研究 [J]. 大气科学, 29 (2): 187-194. Ju Jianhua, Qian Cheng, Cao Jie. 2005. The intraseasonal oscillation of East Asian summer monsoon [J]. J. Atmos. Sci. (in Chinese), 29 (2): 187-194.
[25]  Kanamitsu M, Ebisuzaki W, Woollen J, et al. 2002. NCEP-DOE AMIP-Ⅱ reanalysis (R-2) [J]. Bull. Amer. Meteor. Soc., 83 (11): 1631-1643.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133