ENSO冷暖位相影响东亚冬季风与东亚夏季风联系的非对称性

徐霈强; 冯娟; 陈文

doi:10.3878/j.issn.1006-9895.1509.15192

ENSO冷暖位相影响东亚冬季风与东亚夏季风联系的非对称性

doi: 10.3878/j.issn.1006-9895.1509.15192

1.
中国科学院大气物理研究所季风系统研究中心, 北京 100190;中国科学院大学, 北京 100049
2.
中国科学院大气物理研究所季风系统研究中心, 北京 100190

基金项目: 国家自然科学基金项目41230527、41461144001

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出版历程
- 收稿日期: 2015-05-05

Asymmetric Role of ENSO in the Link between the East Asian Winter Monsoon and the Following Summer Monsoon

1.
Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100190;University of Chinese Academy of Sciences, Beijing 100049
2.
Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100190

摘要

摘要: 东亚冬季风（East Asian Winter Monsoon，简称EAWM）和东亚夏季风（East Asian Summer Monsoon，简称EASM）作为东亚季风系统的两个组成部分，他们之间存在显著的转换关系。前人的研究表明EAWM与次年EASM的转换关系只有在ENSO事件发生时才显著，然而这些研究都是基于ENSO对大气环流的影响是对称的这一假设下进行的。本文的研究表明EAWM和次年EASM的转换关系在ENSO冷暖事件中存在着明显的不对称性。通过将EAWM分为与ENSO有关的部分（EAWM_EN）和与ENSO无关的部分（EAWM_RES），我们发现在强EAWM_EN年（即La Niña年），在西北太平洋会存在一个从冬季维持到次年夏季的气旋性环流异常（the anomalous western North Pacific Cyclone，WNPC），从而造成EASM偏弱；而在弱EAWM_EN年（即El Niño年时），在西北太平洋会存在一个从冬季维持到次年夏季的反气旋性环流异常（the anomalous western North Pacific anticyclone，WNPAC），从而引起次年EASM偏强。比较而言，WNPAC的位置比WNPC的位置偏南，且强度更强，因而在El Niño年能够引起次年EASM更大幅度的增强。造成这一不对称联系的主要原因是热带太平洋和印度洋异常海温的演变差异。在强EAWM_EN年，热带太平洋的负海温异常衰减地较慢，使得在次年夏季仍然维持着显著的负异常海温；相反，在弱EAWM_EN年，热带太平洋的正海温异常衰减地较快，以至于在次年夏季的异常海温信号已经基本消失，但此时印度洋却有着显著的暖海温异常。海温演变的差异进一步造成了大气环流的差异，从而导致EAWM与次年EASM联系的不对称性。
- 东亚冬季风 /
- 东亚夏季风 /
- ENSO /
- 不对称性
Abstract: Evidence demonstrates a link exists between the East Asian winter monsoon (EAWM) and the following East Asian summer monsoon (EASM). Previous studies have found that the EAWM and the following EASM are only closely linked in ENSO years. However, all these studies are based on the hypothesis that the atmosphere's response to ENSO is symmetric. In fact, we demonstrate ENSO plays an asymmetric role in the EAWM-EASM link. This study divides the variability of the EAWM into an ENSO-related part (EAWM_EN) and ENSO-unrelated part (EAWM_RES). The results demonstrate that during strong EAWM_EN conditions (i.e., La Niña events), an anomalous cyclone persists from winter to summer over the western North Pacific (WNP), which can cause a weak EASM in the following summer. In contrast, during weak EAWM_EN conditions (i.e., El Niño events), an anomalous anticyclone persisting from winter to summer is observed over the WNP. However, the anomalous anticyclone's intensity is much stronger than the counterpart and is located more southward. As a result, the intensity of EASM anomalies is stronger during weak EAWM_EN years. This asymmetry may be attributed to the different evolutions of the SST anomalies over the tropical Pacific Ocean and the North Indian Ocean. During strong EAWM_EN conditions, the SST anomalies in the tropical central-eastern Pacific decay slowly and thus significant signals still persist in the following summer, which contribute to the persistence of the WNP anomalous cyclone in the following summer. However, during weak EAWM_EN conditions, the SST anomalies decay quickly in the tropical Pacific, while the Indian Ocean warms significantly in the following summer. Thus the anomalous anticyclone in the WNP results from the significantly warmed Indian Ocean through the "capacitor mechanism".
- East Asian summer monsoon /
- East Asian winter monsoon /
- ENSO /
- Asymmetry

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参考文献(42)

[1]	An S I, Jin F F. 2004. Nonlinearity and asymmetry of ENSO[J]. J. Climate, 17 (12):2399-2412, doi:10.1175/1520-0442(2004)017<2399:NAAOE> 2.0.CO;2.
[2]	An S I, Ham Y G, Kug J S, et al. 2005. El Niño-La Niña asymmetry in the Coupled Model Intercomparison Project simulations[J]. J. Climate, 18 (14):2617-2627, doi: 10.1175/JCLI3433.1.
[3]	Burgers G, Stephenson D B. 1999. The "normality" of El Niño[J]. Geophys. Res. Lett., 26 (8):1027-1030, doi: 10.1029/1999GL900161.
[4]	Charney J G, Shukla J. 1981. Predictability of Monsoons[M]. Cambridge:Cambridge University Press, 99-110.
[5]	陈文. 2002. El Niño和La Niña事件对东亚冬、夏季风循环的影响[J]. 大气科学, 26 (5):595-610. Chen Wen. 2002. Impacts of El Niño and La Niña on the cycle of the East Asian winter and summer monsoon[J]. Chinese J. Atmos. Sci. (in Chinese), 26 (5):595-610, doi:10.3878/j.issn. 1006-9895.2002.05.02.
[6]	Chen L X, Dong M, Shao Yongning. 1992. The characteristics of interannual variations on the East Asian monsoon[J]. J. Meteor. Soc. Japan, 70 (1B):397-421.
[7]	Chen W, Graf H F, Huang R H. 2000. The interannual variability of East Asian winter monsoon and its relation to the summer monsoon[J]. Adv. Atmos. Sci., 17 (1):48-60, doi: 10.1007/s00376-000-0042-5.
[8]	Chen W, Wang L, Xue Y K, et al. 2009. Variabilities of the spring river runoff system in East China and their relations to precipitation and sea surface temperature[J]. Int. J. Climatol., 29 (10):1381-1394, doi:10. 1002/joc.1785.
[9]	Chen W, Feng J, Wu R. 2013. Roles of ENSO and PDO in the link of the East Asian winter monsoon to the following summer monsoon[J]. J. Climate, 26 (2):622-635, doi: 10.1175/JCLI-D-12-00021.1.
[10]	Chen Z S, Wen Z P, Wu R G, et al. 2014. Influence of two types of El Niños on the East Asian climate during boreal summer:A numerical study[J]. Climate Dyn., 43 (1-2):469-481, doi: 10.1007/s00382-013-1943-1.
[11]	Chen Z S, Wen Z P, Wu R G, et al. 2015. Relative importance of tropical SST anomalies in maintaining the western North Pacific anomalous anticyclone during El Niño to La Niña transition years[J]. Climate Dyn., doi: 10.1007/s00382-015-2630-1.
[12]	Ding Y. 1993. Monsoons over China[M]. Dordrecht:Kluwer Academic Publishers, 419.
[13]	Ding Y H. 1992. Summer monsoon rainfalls in China[J]. J. Meteor. Soc. Japan, 70 (1B):373-396.
[14]	Feng J, Chen W, Tam C Y, et al. 2011. Different impacts of El Niño and El Niño Modoki on China rainfall in the decaying phases[J]. Int. J. Climatol., 31 (14):2091-2101, doi: 10.1002/joc.2217.
[15]	Gill A E. 1980. Some simple solutions for heat-induced tropical circulation[J]. Quart. J. Roy. Meteor. Soc., 106 (449):447-462, doi: 10.1002/qj.49710644905.
[16]	Hoerling M P, Kumar A, Zhong M. 1997. El Niño, La Niña, and the nonlinearity of their teleconnections[J]. J. Climate, 10 (8):1769-1786, doi: 10.1175/1520-0442(1997)010<1769:ENOLNA>2.0.CO;2.
[17]	黄荣辉, 陈文. 2002. 关于亚洲季风与ENSO循环相互作用研究最近的进展[J]. 气候与环境研究, 7 (2):146-159. Huang Ronghui, Chen Wen. 2002. Recent progresses in the research on the interaction between Asian monsoon and ENSO cycle[J]. Climatic and Environmental Research (in Chinese), 7 (2):146-159, doi:10.3878/j.issn.1006-9585. 2002.02.03.
[18]	Huang R H, Wu Y F. 1989. The influence of ENSO on the summer climate change in China and its mechanism[J]. Adv. Atmos. Sci., 6 (1):21-32, doi: 10.1007/BF02656915.
[19]	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, doi: 10.1007/BF03342050.
[20]	黄荣辉, 陈文, 丁一汇, 等. 2003. 关于季风动力学以及季风与ENSO循环相互作用的研究[J]. 大气科学, 27 (4):484-502. Huang Ronghui, Chen Wen, Ding Yihui, et al. 2003. Studies on the monsoon dynamics and the interaction between monsoon and ENSO cycle[J]. Chinese J. Atmos. Sci. (in Chinese), 27 (4):484-502, doi:10.3878/j.issn.1006-9895.2003. 04.05.
[21]	Huang R H, Chen W, Yang B L, et al. 2004. Recent advances in studies of the interaction between the East Asian winter and summer monsoons and ENSO cycle[J]. Adv. Atmos. Sci., 21 (3):407-424, doi: 10.1007/BF02915568.
[22]	Huang R H, Chen J L, Huang G. 2007. Characteristics and variations of the East Asian monsoon system and its impacts on climate disasters in China[J]. Adv. Atmos. Sci., 24:993-1023, doi: 10.1007/s00376-007-0993-x.
[23]	Jin F F, An S I, Timmermann A, et al. 2003. Strong El Niño events and nonlinear dynamical heating[J]. Geophys. Res. Lett., 30 (3):1120, doi: 10.1029/2002GL016356.
[24]	Kang I S, Kug J S. 2002. El Niño and La Niña sea surface temperature anomalies:Asymmetry characteristics associated with their wind stress anomalies[J]. J. Geophys. Res., 107 (19):4372, doi: 10.1029/2001JD000393.
[25]	Rayner N A, Parker D E, Horton E B, et al. 2003. Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century[J]. J. Geophys. Res., 108 (D14):4407, doi: 10.1029/2002JD002670.
[26]	Sun Bomin, Sun Shuqing. 1994. The analysis on the features of the atmospheric circulation in preceding winters for the summer drought and flooding in the Yangtze and Huaihe River valley[J]. Adv. Atmos. Sci., 11 (1):79-90, doi: 10.1007/BF02656997.
[27]	Tao Shiyan, Chen Longxun. 1987. A review of recent research on the East Asian summer monsoon in China[M]//Chang C P, Krishnamurti T N. Monsoon Meteorology. Oxford:Oxford University Press, 60-92.
[28]	Uppala S M, Kållberg P W, Simmons A J, et al. 2005. The ERA-40 re-analysis[J]. Quart. J. Roy. Meteor. Soc., 131 (612):2961-3012, doi: 10.1256/qj.04.176.
[29]	Wang B, Fan Z. 1999. Choice of South Asian summer monsoon indices[J]. Bull. Amer. Meteor. Soc., 80 (4):629-638, doi:10.1175/1520-0477(1999) 080<0629:COSASM>2.0.CO;2.
[30]	Wang B, Wu R G, Fu X H. 2000. Pacific-East Asian teleconnection:How does ENSO affect East Asian climate?[J]. J. Climate, 13 (9):1517-1536, doi: 10.1175/1520-0442(2000)013<1517:PEATHD>2.0.CO;2.
[31]	Wang B, Zhang Q. 2002. Pacific-East Asian teleconnection. Part Ⅱ:How the Philippine Sea anomalous anticyclone is established during El Niño development[J]. J. Climate, 15 (22):3252-3265, doi: 10.1175/1520-0442(2002)015<3252:PEATPI>2.0.CO;2.
[32]	Wang L, Wu R G. 2012. In-phase transition from the winter monsoon to the summer monsoon over East Asia:Role of the Indian Ocean[J]. J. Geophys. Res., 117 (D11):D11112, doi: 10.1029/2012JD017509.
[33]	Wu Aiming, Ni Yunqi. 1997. The influence of Tibetan Plateau on the interannual variability of Asian monsoon[J]. Adv. Atmos. Sci., 14 (4):491-504, doi: 10.1007/s00376-997-0067-0.
[34]	Wu B, Li T, Zhou T J. 2010. Asymmetry of atmospheric circulation anomalies over the western North Pacific between El Niño and La Niña[J]. J. Climate, 23 (18):4807-4822, doi: 10.1175/2010JCLI3222.1.
[35]	吴国雄, 孟文. 1998. 赤道印度洋-太平洋地区海气系统的齿轮式耦合和ENSO事件[J]. 大气科学, 22 (4):470-480. Wu Guoxiong, Meng Wen. 1998. Gearing between the Indo-monsoon circulation and Pacific-Walker circulation and the ENSO. Part I:Data analysis[J]. Chinese J. Atmos. Sci. (in Chinese), 22 (4):470-480, doi:10.3878/j.issn. 1006-9895.1998.04.09.
[36]	Xie S P, Hu K M, Hafner J, et al. 2009. Indian Ocean capacitor effect on Indo-western Pacific climate during the summer following El Niño[J]. J. Climate, 22 (3):730-747, doi: 10.1175/2008JCLI2544.1.
[37]	Yang S, Lau K M, Kim K M. 2002. Variations of the East Asian jet stream and Asian-Pacific-American winter climate anomalies[J]. J. Climate, 15 (3):306-325, doi:10.1175/1520-0442(2002)015<0306:VOTEAJ>2.0.CO; 2.
[38]	Zhang R H, Sumi A, Kimoto M. 1996. Impact of El Niño on the East Asian monsoon:A diagnostic study of the '86/87 and '91/92 events[J]. J. Meteor. Soc. Japan, 74:49-62.
[39]	Zhang R H, Sumi A, Kimoto M. 1999. A diagnostic study of the impact of El Niño on the precipitation in China[J]. Adv. Atmos. Sci., 16 (2):229-241, doi: 10.1007/BF02973084.
[40]	Zhang R H, Li T R, Wen M, et al. 2015. Role of intraseasonal oscillation in asymmetric impacts of El Niño and La Niña on the rainfall over southern China in boreal winter[J]. Climate Dyn., 45 (3-4):559-567, doi: 10.1007/s00382-014-2207-4.
[41]	Zhou W, Chan J C L, Li C Y. 2005. South China Sea summer monsoon onset in relation to the off-equatorial ITCZ[J]. Adv. Atmos. Sci., 22 (5):665-676, doi: 10.1007/BF02918710.
[42]	祝从文,何金海,吴国雄. 2000. 东亚季风指数及其与大尺度热力环流年际变化关系[J]. 气象学报, 58 (4):391-402. Zhu C W, He J H, Wu G X. 2000. East Asian monsoon index and its interannual relationship with largescale thermal dynamic circulation[J]. Acta Meteor. Sinica (in Chinese), 58(4):391-402,doi: 10.11676/qxxb2000.042.