| 研究生: |
陳筱雯 Xiao-Wen Chen |
|---|---|
| 論文名稱: |
東亞地區溫度平流變化與鋒生關係之研究 |
| 指導教授: |
江火明
Huo-Ming Jiang |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
地球科學學院 - 大氣物理研究所 Graduate Institute of Atmospheric Physics |
| 畢業學年度: | 93 |
| 語文別: | 中文 |
| 論文頁數: | 83 |
| 中文關鍵詞: | 向量鋒生函數 |
| 外文關鍵詞: | vector frontogenesis function |
| 相關次數: | 點閱:8 下載:0 |
| 分享至: |
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摘要
Miller(1948)提出水平變形場造成鋒生的想法之後,許多氣象學者紛紛利用數值模擬與觀測資料診斷分析來探討,Shapiro(1981)更指出鋒生是非地轉作用的結果,在鋒生過程中,並非維持不變的,換言之,溫度平流隨時間是有變化的,故探討造成溫度平流變率的原因,將有利於了解鋒生的過程。
Keyser(1988)提出的一般化之向量鋒生函數的概念,之後Scheltz and Sander(2002)又指出溫度平流的變率,主要是由非地轉作用項與鋒生所造成的,鋒生作用可分為改變溫度梯度大小之分量與改變溫度梯度方向之分量。
本文分別選取2001年01月23日12UTC華南地區暖平流變化很大的鋒生個案,利用Scheltz and Doswell(1999)之溫度平流變率方程與鋒生診斷方程,詳細探討溫度平流的變化在鋒生過程中的角色。
結果發現,本文所選取的冬天個案為因強烈暖平流所引發的鋒生過程與一般因冷平流所引發的鋒生過程在溫度變化趨勢上相當不同,可提供氣象局作為預報時的參考,且氣旋鋒面系統在鋒生過程中,可分成華中的氣旋與暖鋒軸部分(甲區),以及華南的冷鋒軸部分(乙區)兩部分,發現在鋒生過程中,造成溫度平流變化的因素是不一樣的,可以得到溫度平流變化與鋒生和非地轉作用之間的關係。
參考文獻
Bergeron, R., 1928: Uber die dridimensional verkupfende Wettranalyse(Ⅰ). Geofys. Publ. 5(6), 1-111.
Bergeron, R., 1952: The disturibution of temperature and wind connected with active tropical air in the higher troposphere, and some remarks concerning clear air turbulence at high altitude. Tulles, 4, 43-53.
Bjerknes,J., and H. Solberg, 1921: Meterorological condi- cition for the formation of rain. Geofys. Publ., 2(3), 1-60.
Bjerknes, J., and H. Solberg, 1922: Life cycle of cyclones and polar front theory of atmospheric circulation. Geofys. Publ., 3(1), 1-18.
Dudhia, J., 1933: A nonhydrostatic version of Penn of State/NCAR mesoscale model : Validation tests and simulation of an Atlantic cyclone and cold front. Mon. Wea. Rev., 121,1493-1513.
Eliassen, A., 1962: On the vertical circulation in frontal zones. Geofys. Publ., 24, 147-160.
Grell, G. A.,1933 : Prognostic evaluation of assumptions used by cumulus parameterizations. Mon. Wea. Rev., 121, 1493 -1513.
Hoskins, B.J., and F. P. Bretherton, 1972:Atmospheric frontogenesis model: mathematical formulation and solution. Quart. J. R. Met. Soc., 29, 11-37.
Hoskins, B.J., I. Darghici, and H. C. Davies, 1978:A new look at the ω–equation. Quart. J. R. Met. Soc., 104, 31-38.
Keyser, D., M. J. Reeder, and R.J. Reed, 1988: A generalization of Pettersen’s frontogenesis function and its relation to forcing of vertical motion. Mon. Wea. Rev., 116, 762-780.
Miller, J. E., 1948: On the concept of frontogenesis. J. Meteorol., 5, 169-171.
Sawyer, J. S., 1956: The vertical circulation at mete- orological fronts and its relation to frontogenesis. Proc. Roy. Soc., A243, 246-262.
Shapiro, M. A., 1981: Frontogenesis and geostrophically forced secondary circulation in the vicinity of jet stream-frontal zone systems. J. Atoms. Sci., 38, 954-973.
Schultz, D. M., and C. A. Doswell III, 1999: Conceptual models of upper-level frontogenesis in southwesterly and northwesterly flow. Quart. J. Roy. Meteor. Soc., 125, 2535-2562.
Schultz, D. M., and F. Sanders, 2002: Upper-level frontogenesis associated with the birth of mobile troughs in northwesterly flow. Mon. Wea. Rev., 130, 2593-2610.
Stone, P. H., 1966: Frontogenesis by horizontal wind deformation fields. J. Atoms. Sci., 31, 455-465.
Williams, R. T., and J. Plotkin, 1968: Quasi-geostrophic frontogenesis. J. Atoms. Sci., 25, 201-206.