正壓大氣動能梯度與地轉偏差的關系及其對暴雨的診斷

doi:10.3969/2016jms.0034

首頁 > 過刊瀏覽>2017年第37卷第2期 >265-271. DOI:10.3969/2016jms.0034

正壓大氣動能梯度與地轉偏差的關系及其對暴雨的診斷
DOI:
                        10.3969/2016jms.0034
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡介:
通訊作者:
中圖分類號:
基金項目:國家自然科學基金資助項目（41371495，41375063）；國家科技支撐計劃項目（2013BAk05B01）

Relation between kinetic energy gradient and geostrophic deviation in barotropic atmosphere and diagnosis of torrential rain

Author:

Affiliation:

Fund Project:

摘要

圖/表

訪問統計

參考文獻

相似文獻

引證文獻

資源附件

文章評論

摘要:

本文從正壓大氣原始方程組出發(fā)，分析了不同尺度天氣系統中動能梯度與地轉偏差之間的關系。結果表明：在天氣尺度和α中尺度運動中，動能梯度的模與地轉偏差的模大致成正比。對天氣尺度該比例系數為地轉參數，且與運動本身無關。對較小尺度天氣系統，該比例系數與運動本身密切相關。在β中尺度運動中，動能梯度的模小于等于兩項之和，兩項中的第一項與地轉偏差的模成比例，第二項則是地轉偏差時間導數的模。在動能梯度的高值區(qū)，運動的非平衡性和暴發(fā)性強。本文還以上海"08.8.25"暴雨過程為例，對500 hPa上的動能梯度做了診斷，發(fā)現動能梯度大值區(qū)與強降水的分布有很好的對應關系，并與以上理論分析相一致，這對暴雨等災害性天氣預報具有應用價值。

Abstract:

The primary barotropic atmospheric equations of motion were used to analyze the relationship between the horizontal kinetic energy gradient and geostrophic deviation of different weather scales systems. Results show that for atmospheric motions of synoptic scale and meso-α scale, the value of horizontal kinetic energy gradient is approximately proportional to the value of geostrophic deviation. The proportional coefficient for synoptic scale motion is geostrophic coefficient, which is independent on motion characteristics, while for smaller scale atmospheric motion, it is closely related to motion characteristics. For atmospheric motions of meso-β scale, the value of horizontal kinetic energy gradient amounts to less than the sum of the two terms, in which the first one is proportional to the value of geostrophic deviation and the second one is the value of the time derivative of geostrophic deviation. In the high value area of kinetic energy gradient, the nonequilibrium behavior and outbreak behavior of atmospheric motion are striking. The diagnostic analysis on horizontal kinetic energy gradient was investigated by using the simulation data of a torrential rain occurring on Aug.25, 2008 in Shanghai, which indicated that a quite good corresponding relationship exists between areas with maximum value of kinetic energy gradient and areas with strong precipitation, and it agrees consistent with the theoretical analysis. The diagnostic analysis on horizontal kinetic energy gradient is useful for torrential rain forecast and treatment of disaster weather.

參考文獻

相似文獻

引證文獻

引用本文

于杰,張繼權,朱娟,張銘.正壓大氣動能梯度與地轉偏差的關系及其對暴雨的診斷.氣象科學,2017,37(2):265-271 YU Jie, ZHANG Jiquan, ZHU Juan, ZHANG Ming. Relation between kinetic energy gradient and geostrophic deviation in barotropic atmosphere and diagnosis of torrential rain. Journal of the Meteorological Sciences,2017,37(2):265-271

復制

文章指標

點擊次數:
下載次數:
HTML閱讀次數:
引用次數:

歷史

收稿日期:2016-01-18
最后修改日期:2016-03-28
錄用日期:
在線發(fā)布日期: 2017-05-16
出版日期:

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關視頻

文章指標

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒 激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關視頻

文章指標

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说