梅雨期間台灣豪雨個案之中尺度動能收支

Meso-Scale Kinetic Energy Budget for a Taiwan Heavy Rainfall Case during Mei-Yu Season

蔡清彥(Ching-Yen Tsay) ； 陳靜珣(Ching-Shun Chen)

《大氣科學》 16卷1期 (1988/03) Pp. 31-48

摘要

本文採用Maddox's（1980）的尺度分離法及Carney and Vincent（1985，1986）所發展的動能收支方程式，診斷分析1985年5月28日台灣豪雨個案之中尺度動能收支。此處所指的中尺度系統是指波長介於750與1900公里的系統。由動能收支計算結果顯示，華南地區西南噴流可由非地轉風穿越等壓線所產生之能量轉換及垂直方向的尺度交互作用而形成的。當噴流形成之後，華南地區的西南噴流則以中尺度風場本身的垂直與水平平流，造成噴流之移動、維持與發展。然而對台灣西北海面的噴流而言，其維持與發展則須靠不同尺度間的水平及垂直的交互作用。

關鍵字

梅雨 ； 中尺度 ； 動能分析

並列摘要

Utilizing scale separation technique by Maddox (1980) and kinetic energy equation by Carney and Vincent (1985, 1986), this paper studied meso-scale kinetic energy budget of a Taiwan Mei-Yu case of May 28, 1985. The meso-scale wavelength of 750 to 1900 km was used for the scale separation in the present study.We found that the formation of a southwesterly low-level jet in the south east China was contributed by the energy conversion produced by ageostrophic wind and by the scale interaction involving vertical velocity. After the formation, movement, maintenance and development of the low-level jet was mainly contributed by the vertical and horizontal advection. However, the development and maintenance of low-level jet to the northwest of Taiwan was mainly contributed by the horizontal and verticals scale interactions.

並列關鍵字

Mei-Yu ； meso-scale ； kinetic energy analysis