简易海洋同化数据中的厄尔尼诺现象
El Niño phenomenon in SODA data
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摘要: 为研究在厄尔尼诺现象演变过程中海气相互作用的性态特征,该文再次应用拓展伴随模态分析于简易海洋同化数据(SODA data).结果表明:通过相互作用形成厄尔尼诺/拉尼娜现象的海洋与大气具有明显不同的性态,气候系统中并不存在一个相对独立的热带太平洋大气变异,但是的确存在一个相对独立的热带太平洋海洋变异;原因在于大气是底部界面受热而海洋是顶部界面受热,从而导致前者具有较后者强烈得多的斜压不稳定性和能够覆盖大部分热带太平洋的赤道辐合带; 再次证实了正是直接来自中纬度海域的西风爆发和海面风辐聚导致赤道太平洋上层海水的东向移动和经向辐聚造就了厄尔尼诺所特有的增温信号.
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关键词:
- 厄尔尼诺/拉尼娜现象 /
- 形成机理 /
- 拓展伴随模态分析 /
- 简易海洋同化数据
Abstract: To study how the air and sea interact with each other during El Niño/La Niña onsets,extended associate pattern analysis(EAPA)is adopted with the simple ocean data assimilation(SODA)data.The results show that as El Niño/La Niña's parents their behaviors are quite different,there does not exist a relatively independent tropical atmosphere but does exista relatively independent tropical Pacific because the air is heated from bottom surface instead of top surface and of much stronger baroclinic instability than the sea and has a very large inter-tropical convergence zone covering the most tropical Pacific.The idea that it is the wes er burst and wind convergence,coming from middle latitudes directly which produce the sea-water east ward movement and meridional convergence in the upper levels and result in the typical El Niño sea surface temperature warm signal is confirmed again.-
Key words:
- El Niñ /
- o/La Niñ /
- a phenomenon /
- causes
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BJERKNES J. Atmospheric teleconnections from the equatorial Pacific[J]. Mon Weather Rev, 1969, 97: 163-172. WYRTKI K, El Ninio——the dynamic response of the equatorial Pacific Ocean to atmospheric forcing[J]. J Phys Oceanog, 1975, 5:572-584. MCREAY J P. A model of tropical ocean-atmosphere interaction[J]. Mon Weather Rev, 1983, 111:370-387. ZEBIAK S E,CANE M A. A model El Ninno-Southern Oscillation[J]. Mon Weather Rev, 1987,115:2 262-2 278. SCHOPF P S,SUAREZ M J. Oscillations in a coupled ocean atmosphere model[J]. J Atmos Sci, 1988,45: 549-566. BATTISTI D S. The dynamics and thermodynamics of a warming event in a coupled tropical atmosphere/ocean model[J]. J Atmos Sci,1988, 45:2 889-2 919. BATTISTI D S, HIRST A C. Interannual variability in the tropical atmosphere/ocean system: influence of the basic state and ocean geometry[J]. J Atmos Sci, 1988, 45: 1 687-1 712. 中国科学院地理研究所长期天气预报组.热带海洋对副热带高压长期变化的影响[J].科学通报,1977,22(7):313-317. LI C. The strong and frequent activities of the East Asian trough and El Ninno onset[J]. Science in China (B), 1988, 18: 667-674. MU M, LI C. Interaction between subsurface ocean temperature anomalies in the western Pacific warm pool and ENSO cycle[J]. Chinese J Atmos Sci, 2000,24: 107-121. WU G, MENG W. Gearing between the Indo-monsoon circulation and the Pacific-Walker circulation and the ENSO: Part Ⅰ. Data analyses[J]. Scientia Atmospherica Sinica, 1998,22(4) : 470-480. 崔茂常,莫军,乔方利.厄尔尼诺事件的成因与预报[J].水动力学研究与进展,2003,18A(6):702-710. CUI M, MO J,QIAO F. El Nino phenomenon and extended associate pattern analysis[J]. Journal of Hydrodynamics(scr B),2004,16(1): 90-100. CARTON J A, CHEPURIN G,CAO X,et al. A simple ocean data assimilation analysis ot the global upper ocean 1950-1995: Part 1.Methodology[J]. J Phys Oceanogr, 2000,30: 294-309. CARTON J A, CHEPURIN G, CAO X. A simple ocean data assimilation analysis of the global upper ocean 1950-1995:Part 2. resuits[J]. J Phys Oceanogr, 2000,30: 310-316. Von STORCH H, ZORITA E, CUBASCH U. Downscaling of global climate change estimates to regional scales: an application to Iberian rainfall in wintertime[J]. J Climate, 1993,6: 1 161-1 171. ZORITA E, KHARIN V, Von STORCH H. The atmospheric circulation and sea surface temperature in the North Atlantic area in winter: their interaction and relevance for Iberian precipitaion[J]. J Climate, 1992,5:1 097-1 171. LATIF M, BARNETT T P. Causes of decadal climate variability over the North Pacific and North America[J]. Science, 1994, 266:634-637. LAU K M, WENG H Y. Relationship between multi-scale variability of global sea surface temperature and summer rainfall in China[A]. WANG M,et al. Asia Monsoon and Havy Rin in China[M]. Beijing:China Meteorology Press, 1998. 301-313. 乔方利,于卫东,袁业立.厄尔尼诺/拉尼娜信号循环回路及其传播特性研究[J].海洋学报,2004,26(4):1-8.
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