| 吉林省主汛期典型多雨年和少雨年成因对比分析 |
| |
| 引用本文： | 纪玲玲,杨雪艳,张婷,姜红霞,马树庆.吉林省主汛期典型多雨年和少雨年成因对比分析[J].气象与环境学报,2013,29(3):42-47. |
| |
| 作者姓名： | 纪玲玲 杨雪艳 张婷 姜红霞 马树庆 |
| |
| 作者单位： | 1.吉林省气象台，吉林 长春 130062；2吉林省气候中心，吉林 长春130062； 3.吉林省辽源市气象台，吉林 辽源 136200 |
| |
| 基金项目： | 中国气象局（气象）行业专项（GYHY201206024）“东北地区设施农业生产天气预报技术研究“资助. |
| |
| 摘 要： | 将1951-2011年吉林省主汛期降水量排名的前、后6位分别定义为多、少雨年，利用NCEP（2.5°×2.5°）再分析资料计算主汛期平均高度场、温度场、风场及比湿、涡度等物理量场；根据天气学原理和常规天气预报经验，对比分析主汛期典型多雨与少雨天气系统结构形态、分布位置、中心强度等特征。结果表明：500 hPa多雨年568等高线较少雨年平均偏南3个纬度，副热带高压588等高线较少雨年平均偏西7个经度偏北1个纬度；低层辐合高层辐散是多雨年的重要特征；850 hPa和700 hPa平均水汽含量多雨年明显多于少雨年；典型多雨年850 hPa风场贝加尔湖附近为单辐合中心，少雨年为双辐合中心。
|
| 关 键 词： | 汛期降水量 多雨和少雨 NCEP资料 高空槽 副热带高压 |
Comparative analysis of forming reasons in typical rainy and rainless years during main flood season in Jflin province |
| |
| JI Ling-ling,YANG Xue-yan,ZHANG Ting,JIANG Hong-xia,MA Shu-qing.Comparative analysis of forming reasons in typical rainy and rainless years during main flood season in Jflin province[J].Journal of Meteorology and Environment,2013,29(3):42-47. |
| |
| Authors: | JI Ling-ling YANG Xue-yan ZHANG Ting JIANG Hong-xia MA Shu-qing |
| |
| Institution: | 1. Meteorological Observatory in Jilin Province, Changchu 130012, China; 2. Climate Centre in Jilin Province, Changchu 130012, China; 3. Liaoyuan Meteorological Observatory, Liaoyuan 136200, China |
| |
| Abstract: | The precipitation during main flood season was ranked in a manner that the first and last six orders were defined as rainy years and rainless years respectively. Based on the NECP reanalysis data with resolution of 2.5°×2.5°,a series of physical quantities such as the average height field,temperature field,the wind field,specific hu- midity and vorticity during flood season were analyzed. The structure and location as well as center intensity of synoptic system during flood season of rainy years and rainless years were compared according to synoptic theory and the conventional forecasting experience. The results indicate that compared with rainless years, the location of 568 isoheight at 500 hPa in rainy years is moved to the south about three latitudes,while high subtropical 588 iso- height is moved to the west about seven longitudes and to the north about one latitude. The lower convergence and upper divergence are the main features in a rainy year. The mean water vapor contents at 850 hPa and 700 hPa are higher in a rainy year than in a rainless year. The wind field near the Lake Baikal is a single convergent center in a typical rainy year at 850 hPa, while it is double convergent centers in a typical rainless year. |
| |
| Keywords: | Flood season precipitation Rainy and rainless years NCEP data Upper trough High subtropical |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《气象与环境学报》浏览原始摘要信息 |
| 点击此处可从《气象与环境学报》下载免费的PDF全文 |
