- 作者: 廖學鎰; 張鳳嬌; 高紀安; 邱爾文; 江火明
- 作者服務機構: 中央大學
- 中文摘要: XI. 二維模式冰晶成長之數值實驗。 I.依據Mullins和Sekerka的晶體發展形態穩定性理論,及Komabayasi之小擾動法之擴張,以有限擾動二維數值模擬方式求解冰晶形態發展。 數值實驗結果,與Fukuta之實驗結果比較,對非線性方程已得一穩定性解適宜冰晶之晶體形態。※II.西藏山區熱源對遠東地區平均緯流之動力作用 II.使用雙層準地轉模式,解答渦旋度方程與。ω一 方程,討論遠東大氣環流之變化。在模式中特別考慮西藏山區加熱的效應。地形的加熱效應,在大氣中層生成一波長約為4000公里的地形波,波槽位置在中國大陸沿海及新彊,而小波脊位置在雲南、廣西一帶。※III.中國大陸大氣動能產生與消散之日變化及長期性變化。 III.本研究係使用中國大陸民國55年至59年的探空責料,採用四層模式,分別計算出地面至300mb.等壓面之間各層的動能生產,當地變化量,水平傳遞量,與垂直輸送量 ;並且由能量平衡方程之剩餘量得出動能之消散量“同時也求得上述各物理量的日變化,長期性變化及垂直分佈情形。 計算結果顯示,動能產生量與消散量,冬季均大於夏季。又00 GMT的數值大於12GMT的數值,日變化情況,在夏季較為明顯。此外,也算出了消散時問,藉以討論大氣層各部份的動能消散效率。II.西藏山區熱源對遠東地區平均緯流之動力作用 Dynamical Action of Heat Source on the Mean Zonal Flow over theFar East.
- 英文摘要: I. Numerical Experiment of Growth of Ice Crystal by Two Dimensinal Model According to the result of Mullins and Sekerka's theoretical analysis and the infinite perturbation method, by means of finite perturbation me- thod the diffusion controlled growth of ice crystal under the effect of capil- lary was calculated. Result of numerical was compared with Fukuta's experimental results. A steady result which is fit for the ice crystal form of non-linear equation has been developed.II. Dynamical Action of Heat Source on the Mean Zonal Flow over the Far East. By making use of 2-layer quasi-geostrophic model, the numerical solu- tion of vorticity equation and (ω)-equation are examined. In this model, the effect of heat source and sink over the Himalayas region are taken into consideration. Due to the mechanical orographic influences, the pronounced stationary wave with 4000km wave length are generated in the middle layer of the atmosphere over the Continental China. The trough is located in the east coast of China and Singkiang, and the small ridge is located in the southwest- ern China.III. Diurnal and Long-term Variations of the Kinetic Energy Generation and Dissipation. The vertical distribution together with the diurnal variation and long- term variation of the kinetic energy balance of the atmosphere are studied with the wind and geopotential data over Continental China during 1966- 1970. The generation, the local change, the horizontal outflow and the vertical transport are computed by the use of a four layer model ranging from ground surface to 300mb. The dissipation is then obtained as the residual to balance the kinetic energy equation. Larger values of generation and dissipation are obtained for the Win- ten, while more significant diurnal variation occurs during the Summer Furthermore, the previously discovered double maxima of the generation and dissipation is confirmed in this study.
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