|
|||||
|
|
| A STUDY ON THE PRECIPITATION CHARACTERISTICS OVER THE SOUTH CHINA SEA BEFORE AND AFTER THE MONSOON ONSET | |
| 作者姓名： | 李耀东 宋明坤 胡亮 |
| 作者单位： | Institute of Aviation Meteorology, Beijing 100085 China;;Institute of Aviation Meteorology, Beijing 100085 China;Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101 China;;National Satellite Meteorology Center, CMA, Beijing 100081 China |
| 基金项目： | National Science Foundation of China (41175046) |
| 摘 要： | This paper presents a study on the temporal and spatial variations of the precipitation over the area of the South China Sea (SCS) during the monsoon onset period. The data used are from the Tropical Rainfall Measuring Mission (TRMM) observations between April and June over the nine years from 1998 to 2006. This study focuses on the central and northern part of South China Sea (110-120°E, 10-20°N). Based on the observations, the 27th pentad is selected as the occurrence time of the SCS monsoon onset. The conclusions are as follows. (1) After the monsoon onset, the specific area, defined as the ratio of the number of pixels with certain type of precipitation to the number of total pixels, extends significantly for both convective and stratiform rain, with the latter having a larger magnitude. The specific rainfall, defined as the ratio of the amount of certain type of precipitation to the total amount of precipitation, decreases for convective rain and increases for stratiform rain. (2) Results also show significant increase in heavy rain and decrease in light rain after the monsoon onset. (3) Changes are also observed in the rainfall horizontal distributions over the SCS before and after the monsoon onset, manifested by the relocation of precipitation minima for both convective and stratiform rain. (4) After the monsoon onset, the variability in characteristics of precipitation vertical structure increases significantly, leading to more latent heat release and consequently deeper convection. Meanwhile, the bright-band altitude of stratiform precipitation is also elevated. |
| 关 键 词： | TRMM South China Sea monsoon onset precipitation |
| 收稿时间： | 2010/11/8 0:00:00 |
| 修稿时间： | 2011/12/22 0:00:00 |
A STUDY ON THE PRECIPITATION CHARACTERISTICS OVER THE SOUTH CHINA SEA BEFORE AND AFTER THE MONSOON ONSET |
|
| LI Yao-dong,SONG Ming-kun and HU Liang.A STUDY ON THE PRECIPITATION CHARACTERISTICS OVER THE SOUTH CHINA SEA BEFORE AND AFTER THE MONSOON ONSET[J].Journal of Tropical Meteorology,2012,18(1):1-10. | |
| Authors: | LI Yao-dong SONG Ming-kun and HU Liang |
| Institution: | 1. Institute of Aviation Meteorology, Beijing 100085 China 2. Institute of Aviation Meteorology, Beijing 100085 China; Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101 China 3. National Satellite Meteorology Center, CMA, Beijing 100081 China |
| Abstract: | This paper presents a study on the temporal and spatial variations of the precipitation over the area of the South China Sea (SCS) during the monsoon onset period. The data used are from the Tropical Rainfall Measuring Mission (TRMM) observations between April and June over the nine years from 1998 to 2006. This study focuses on the central and northern part of South China Sea (110-120°E, 10-20°N). Based on the observations, the 27th pentad is selected as the occurrence time of the SCS monsoon onset. The conclusions are as follows. (1) After the monsoon onset, the specific area, defined as the ratio of the number of pixels with certain type of precipitation to the number of total pixels, extends significantly for both convective and stratiform rain, with the latter having a larger magnitude. The specific rainfall, defined as the ratio of the amount of certain type of precipitation to the total amount of precipitation, decreases for convective rain and increases for stratiform rain. (2) Results also show significant increase in heavy rain and decrease in light rain after the monsoon onset. (3) Changes are also observed in the rainfall horizontal distributions over the SCS before and after the monsoon onset, manifested by the relocation of precipitation minima for both convective and stratiform rain. (4) After the monsoon onset, the variability in characteristics of precipitation vertical structure increases significantly, leading to more latent heat release and consequently deeper convection. Meanwhile, the bright-band altitude of stratiform precipitation is also elevated. |
| Keywords: | TRMM South China Sea monsoon onset precipitation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《热带气象学报(英文版)》浏览原始摘要信息 | |
| 点击此处可从《热带气象学报(英文版)》下载免费的PDF全文 | |