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研究生: 黃立凡
Li-Fan Hunag
論文名稱: 西北太平洋-東亞地區 降雨之季節至年際變化
Rainfall variations in the western North Pacific and East Asian sector
指導教授: 曾莉珊
Tseng, Li-Shan
周佳
Chou, Chia
學位類別: 碩士
Master
系所名稱: 地球科學系
Department of Earth Sciences
論文出版年: 2005
畢業學年度: 94
語文別: 中文
論文頁數: 141
中文關鍵詞: 降雨夏季季風年際變化
論文種類: 學術論文
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  • 本研究將西北太平洋-東亞地區的降雨分為春雨期、梅雨期、西北太平洋夏季季風雨期、秋雨期以及冬雨期,對各降雨期降雨的主要機制以及水氣的主要來源分別做了探討。西北太平洋-東亞地區的濕季包括:5月底到7月中典型南北溫差造成的梅雨期;7月中到9月底海洋上的西北太平洋夏季季風雨期。梅雨期鋒面降雨水氣的主要來源為,夏季季風環流的西南風與副熱帶高壓的東南風輻合,提供了水氣給鋒面系統;南邊海上降雨系統主要為高海溫透過地表熱量通量的傳送,增加進入大氣的淨能(Fnet)而產生的對流為水氣主要來源。在西北太平洋夏季季風雨期,水氣的主要來源為和高海溫相關的Fnet所引起的對流系統。此季風系統造成季風槽的向東延伸,使副熱帶高壓北移,副高的下沉氣流抑制了北邊梅雨鋒面對流的發展,故此時北邊梅雨鋒面已減弱而消失。西北太平洋-東亞地區的乾季即為冬雨期,此時期大環境被強勁的東北風所影響,空氣乾冷,水氣的主要來源是北方的冷空氣和南方的暖空氣相遇,造成暖空氣的抬升而產生降雨。介於濕季與乾季間的過渡時期:9月底到11月中旬為濕季過渡到乾季的秋雨期;3月初到5月中為乾季過渡到濕季的春雨期。秋雨期降雨所需水氣的主要來源為高海溫所引起的熱帶對流,但此時北方已受東北風影響,大氣環境已經不利於降雨。當北方伴隨鋒面的冷空氣南下時,會抑制對流系統北緣對流的發展,使在北緯20度以北地區的降雨減少。春雨期大氣環境已經開始有利降雨,但相對於秋雨期而言,海溫偏冷不利於對流發生,春雨期水氣的主要來源為南方傳送過來的濕平流,此濕平流為伴隨向西延伸的太平洋副高所產生的。
    在年際變化部份,ENSO為影響西北太平洋-東亞地區最強的年際變化現象,在ENSO發生期間,春雨期、秋雨期以及西北太平洋夏季季風雨期降雨有明顯變化。El Nio(La Nia)發展年(year 0),西北太平洋地區的海溫偏低(高),減弱(增強)了熱帶對流,造成秋雨期降雨減少(增加)。El Nio(La Nia)消弱年(year 1),西北太平洋上所產生的反氣旋(氣旋)距平,使南方帶來的水氣增加(減少),造成春雨期降雨增加(減少)。El Nio在發展年與消弱年對於西北太平洋夏季季風區的影響是相反的,這樣的雙年變化(biennial variation)包括降雨、850毫巴的重力位高度場、海溫、風速風向以及Fnet都可以看到這樣相反的變化情形。El Nio year 0(year 1)在西北太平洋氣旋(反氣旋)距平的影響之下,使得西北太平洋夏季季風區的風速增強(減弱),使得蒸發量增加(減少),進而造成由Fnet所引起的上升(下沉)運動,造成西北太平洋夏季季風雨期的降雨是增加(減少),此時海溫並不如我們預期的對降雨有正回饋的貢獻。

    摘要………………………………………………………………………………….Ⅰ 致謝………………………………………………………………………………….Ⅲ 目錄………………………………………………………………………………….Ⅴ 圖目………………………………………………………………………………….Ⅶ 第一章 前言……………………………………………………………………….. 1 第二章 資料分析與方法………………………………………………………….10 2.1 資料來源……………………………………………………………….….10 2.2 分析方法…………………………………………………………………..11 第三章 西北太平洋-東亞地區 降雨的季節變化…………………………….13 3.1 主要降雨季節…….…………………………………………….…………13 3.2 濕季-夏季降雨…….…………………………………………………….20 3.2.1 梅雨期……………………………………………………………..21 3.2.2 西北太平洋夏季季風雨期………………………………………..24 3.3 乾季-冬雨期……………………………………………………………..28 3.4 過渡時期降雨……………………………………………………………..29 3.4.1 乾季過渡到濕季-春雨期………………………………………..29 3.4.2 濕季過渡到乾季-秋雨期………………………………………..31 3.5 討論……………………………………………………………………….33 第四章 西北太平洋-東亞地區 降雨的年際變化……………………………35 4.1 降雨年際變化與ENSO的關係…………………………………………35 4.2 春雨期降雨變化………………………………………………………….49 4.3 秋雨期降雨變化………………………………………………………….51 4.4 西北太平洋夏季季風雨期的雙年變化………………………………….52 第五章 結論與討論……………………………………………………………….54 5.1 西北太平洋-東亞地區 降雨的季節變化…………………………….54 5.2西北太平洋-東亞地區 降雨的年際變化……………………………..58 參考文獻…………………………………………………………………………….61 圖表………………………………………………………………………………….71 附錄A………………………………………………………………………………109

    王作臺與胡志文,1994:ENSO年後春季東亞大氣特性之分析 第一部份:海溫及外逸長波輻射特徵。大氣科學,22,339-359。
    胡志文與王作臺,1994:ENSO年後春季東亞大氣特性之分析 第二部份:高低層環流之特性及推論。大氣科學,22,361-385。
    陳昭銘,汪鳳如,呂芳川與郭漱泠,2002:聖嬰現象與1998年台灣異常氣候:全年偏暖與春雨偏多現象。大氣科學,30,331-349。
    陳泰然,1987:臺灣乾濕梅雨期之平均環流特徵。大氣科學,15,17-30。
    許子乾與王作臺,1990:臺灣地區春夏季乾濕年受長週期擾動影響之研究。大氣科學,18,85-109。
    蔡清彥,柯文雄與朱仲謀,1991:高層噴流於台灣地區梅雨期間之變化研究。大氣科學,19,89-129。
    盧孟明,2000:聖嬰現象與台灣異常氣候關係之探討。大氣科學,28,91-113。
    An, Z. S., J. E. Kutzbach, W. L. Prell, and S. C. Porter, 2001:Evolution of Asian monsoon and phased uplift of the Himalaya-Tibetan plateau since late Miocene times. Nature, 411, 62-66.
    Chang, C.-P., Y. Zhang, and T. Li. 2000a:Interannual and interdecadal variations of East Asian summer monsoon and tropical Pacific SSTs. Part Ⅰ:Roles of the subtropical ridge. J. Climate, 13, 4310-4325.
    Chou, C., Jein-Yi Tu, and Jia-Yu Yu, 2003:Interannual Variability of the Western North Pacific Summer Monsoon:Differences between ENSO and Non-ENSO Years. J. Climate, 16, 2275-2287.
    Chou, C., 2003:Land-sea heating contrast in an idealized Asian summer monsoon. Climate Dyn., 21, 11-25.
    Chou, C., and J. D. Neelin, 2003:Mechanisms Limiting the Northward extend of the northern Summer Monsoon over North America, Asia, and Africa. J. Climate, 16, 406-424.
    Chou, C., 2004: Establishment of the low-level wind anomalies over the western North Pacific during ENSO development. J. Climate, 17, 2195-2212.
    Chou, C., and J. D. Neelin, 2004:Mechanisms of global warming impacts on regional tropical precipitation. J. Climate, 17, 2688-2701.
    Geng, Q. Z., A. Sumi, and A. Numaguti, 2000:Role of transients in the dynamics of East Asian summer seasonal mean circulation anomalies-A study of 1993 and 1994. J. Climate, 13, 3511-3531.
    Jiang, Z., G. T.-J. Chen, and M.- C. Wu, 2003:Large-scale circulation patterns associated with heavy spring rain events over Taiwan in strong ENSO and Non-ENSO year. Mon. Wea. Rev., 131, 1769-1782.
    Kara, A. B., P. A. Rochford, and H. E. Hurlburt, 2003:Mixed layer depth variability over the global ocean. J. Geophys. Res., 108, C3, 3079, doi:10.1029/2000JC000736.
    Kawamura, R., T. Matsuura, and S. Iisuka, 2001:Interannual atmosphere-ocean variations in the tropical western North Pacific relevant to the Asian summer monsoon-ENSO coupling. J. Meteor. Soc. Japan, 79, 883-898.
    Kinter, J. L. Ⅲ, K. Miyakoda, and S. Yang, 2002:Recent change in the connection from the Asian Monsoon to ENSO. J. Climate, 15, 1203-1215.
    Li, C., and M. Yanai, 1996:The onset and interannual variability of the Asian summer monsoon in relation to land-sea thermal contrast. J. Climate, 9, 358-375.
    Li, T. and B. Wang, 2004:A Review on the Western North Pacific Monsoon:Synoptic-to-Interannual Variabilities. Submitted to TAO.
    LinHo, and B. Wang, 2002:The Time-space structure of Asian summer monsoon-A fast annual cycle view. J. Climate,15, 2001-2019.
    LinHo, 2005:Seasonal transition from Boreal Winter to Spring – as epitomized by Onset of the south China Spring rain., submitted to J. Climate.
    Liu, X. and M. Yanai, 2002:Influence of Eurasian spring snow cover on Asian summer rainfall. Int. J. Climatol., 22, 1075-1089.
    Luo, H., and M. Yanai, 1984:The large-scale circulation and heat sources over the Tibetan Plateau and surrounging areas during the early summer of 1979. Part Ⅱ:heat and moisture budgets. Mon. Wea. Rev., 112, 966-989.
    Meehl, G., 1987:The annual cycle and interannual variability in the tropical Pacific and Indian Ocean region. Mon. Wea. Rev., 115, 27-50.
    Meehl, G. A., 1994a: Couple land-ocean-atmosphere processes and south Asian monsoon variability. Science, 266, 263-267.
    Nitta, T., 1983:Observational study of heat sources over eastern Tibetan Plateau during the summer monsoon. J. Meteor. Soc. Japan, 61, 590-605.
    Park, C.-K., and S. D. Schubert, 1997:On the nature of the 1994 East Asian summer drougt. J. Climate, 10, 1056-1070.
    Ramstein, G., F. Fluteau, J. Besse, and S. Joussaume, 1997:Effect of orogeny, plate motion and land-sea distribution on Eurasian climate change over the past 30 million years. Nature, 386, 788-795.
    Reynolds, R. W., N. A. Rayner, T. M. Smith, D. C. Stokes, and W. Wang, 2002:An Improved In Situ and Satellite SST Analysis for Climate. J. Climate, 15, 1609-1625.
    Shukla, J., 1984:Predictability of time averages. Part Ⅱ:the influence of the boundary forcing. In:Burridge DM, Kallen E(eds)Problems and prospects in long and medium range weather forecasting. Springer, Berlin, Heidelberg, New York, 155-206.
    Shukla, J., and DA. Mooley, 1987:Empirical prediction of the summer monsoon rainfall over India. Mon. Wea. Rev., 115, 695-703.
    Smith, T. M., and R. W. Reynolds, 2003:Extended Reconstruction of Global Sea Surface Temperatures Based on COADS Data(1854-1997). J. Climate,16,1495-1510.
    Su, H., J. D. Neelin, and C. Chou, 2001:Tropical teleconnection and local response to SST anomalies during the 1997-1998 El Nio. J. Geophys. Res., 106, 20025-20043.
    Su, H., and J. D. Neelin, 2002:Teleconnection mechanisms for tropical Pacific descent anomalies during El Nio. J. Atmos. Sci., 59, 2694-2712.
    Wang, B., and Z. Fan, 1999:Choice of south Asian summer monsoon indices. Bull. Amer. Meteor. Soc., 80, 629-638.
    Wang, B., R. Wu, and X. Fu, 2000:Pacific-East Asian teleconnection:How does ENSO affect East Asian climate?J. Climate, 13, 1517-1536.
    Wang, B., R. Wu, and K.-M. Lau, 2001:Interannual variability of the Asian summer monsoon:Contrasts between the Indian and the western North Pacific-East Asian monsoons. J. Climate. 14, 4073-4090.
    Wang, B., and LinHo, 2002:Rainy Season of the Asian-Pacific Summer Monsoon. J. Climate, 15, 386-398.
    Weng, H., K.-M. Lau, and K.-K. Xue, 1999:Multi-scale summer rainfall variability over China and uts long-term link to global sea surface temperature variability. J. Meteor. Soc. Japan, 77, 845-857.
    Webster, P. J., 1987:The elementary monsoon. Monsoons, J. S. Fein and P. L. Stephens, Eds., John Wiley, 3-32.
    Webster, P. J., and S. Yang, 1992:Monsoon and ENSO:selectively interactive systems. Q. J. R. Meteorol. Soc., 118, 877-926.
    Webster, P. J., V. O. Magaa, T. N. Palmer, J. Shukla, R. A. Tomas, M. Yanai, and T. Yasunari, 1998:Monsoon:Processes, predictability, and the prospects for prediction. J. Geophys. Res., 103, 14451-14510.
    Wu, G. and Y. Zhang, 1998:Tibetan Plateau forcing and the timing of the monsoon onset over South Asia and South China Sea. Mon. Wea. Rev., 126, 913-927.
    Wu, R., and B. Wang, 2000:Interannual variability of summer monsoon onset over the western North Pacific and the underlying processes. J. Climate, 13, 2483-2501.
    Wu, R., 2002:Processes for the northeastward advance of the summer monsoon over the western North Pacific. J. Meter. Soc. Japan, 80,67-83.
    Wu, R., and B. Wang, 2002:A contrast of the East Asian summer monsoon-ENSO relationship between 1962-77 and 1978-93. J. Climate, 15, 3266-3279.
    Xie, P. and P. A. Arkin, 1997:Global Precipitation:A 17-Year Monthly Analysis Based Gauge Observations, Satellite Estimates, and Numerical Model Outputs. Bull. Amer. Meteor. Soc., 78, 2539-2558.
    Yanai, M., C. Li, and Z. Song, 1992:Seasonal heating of the Tibetan Plateau and its effects on the evolution of the Asian summer monsoon. J. Meteor. Soc. Japan, 70, 319-351.
    Yanai, M. and C. Li, 1994a:Mechanism of heating and the boundary layer over the Tibetan Plateau. Mon. Wea. Rev., 122, 305-323.
    Yang, S., and L. Xu, 1994:Linkage between Eurasian winter snow cover and regional Chinese summer rainfall. Int. J. Climatol., 14, 739-750.
    Yang, S., 1996:ENSO-snow-monsoon associations and seasonal-interannual predictions. Int. J. Climatol., 16, 125-134.
    Yang, S., and K.-M. Lau, 1998:Influences of sea surface temperature and ground wetness on Asian summer monsoon. J. Climate, 11, 3230-3246.
    Ye, D, 1981:Some characteristics of the summer circulation over the Qinghai-Xizang(Tibet)Plateau and its neighborhood. Bull. Amer. Meteor., Soc., 62, 14-19.
    Young, J. A., 1987:Physics of monsoons:The current view. Monsoons, J. S. Fein and P. L. Stephens, Eds., John Wiley, 211-243.
    Zou, C. Z., M. L. V. Woert, C. Xu, and K. Syed, 2004:Assessment of the NCEP-DOE Reanalysis-2 and TOVS Pathfinder A Moisture Fields and Their Use in Antarctic Net Precipitation Estimates. Mon. Wea. Rev.,132, 2463-2476.

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