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| 长江中下游地区春季降水的时空特征 | |
| 引用本文： | 黄亮,赵勇,刘敏.长江中下游地区春季降水的时空特征[J].南京气象学院学报,2010,33(3):375-384. |
| 作者姓名： | 黄亮 赵勇 刘敏 |
| 作者单位： | 1. 南通市气象局,江苏,南通,226006 2. 沙漠气象研究所,新疆,乌鲁木齐,830002 3. 江苏省气象局,江苏,南京,210008 |
| 基金项目： | 中央级科研院所基本科研业务费专项 |
| 摘 要： | 使用41站日降水资料和NCEP/NCAR再分析月平均资料,研究了长江中下游地区春季降水的时空特征。结果表明,过去50多年来,长江中下游地区春季的雨日、雨量呈整体下降趋势,降水强度呈东减西增的趋势;该区春季连续性降水通常以2 d降水居多,江北地区以连续性中小降水为主,而江南地区则是独立性的强降水居多。春季长江中下游地区在近50 a里呈现出干旱化趋势,其和对流层中高层气温下降关系密切,由于气温相对下降,我国东部上空高层产生气旋性环流异常,不利于降水的发生。 |
| 关 键 词： | 雨量 雨日 强降水 连续性降水 年代际变化 |
Temporal and Spatial Features of Spring Precipitation in the Middle and Lower Reaches of the Yangtze River |
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| HUANG Liang,ZHAO Yong,LIU Min.Temporal and Spatial Features of Spring Precipitation in the Middle and Lower Reaches of the Yangtze River[J].Journal of Nanjing Institute of Meteorology,2010,33(3):375-384. | |
| Authors: | HUANG Liang ZHAO Yong LIU Min |
| Institution: | 1.Nantong Meteorological Bureau,Nantong 226002,China; 2.Institute of Desert Meteorology,Urumqi 830002,China;3.Jiangsu Meteorological Bureau,Nanjing 210008,China) |
| Abstract: | Based on daily precipitation data from 41 stations in China and monthly NCEP/NCAR reanalysis data,this paper studies the temporal and spatial features of spring precipitation in the middle and lower reaches of Yangtze River.The results indicate that,over the past 50 years,the rainfall amount and the number of rainy day show a decreasing trend and the precipitation strength shows a decreasing trend in the east but an increasing trend in the west.The successive precipitation is mostly the 2-day precipitation.There is often successive and light precipitation to north of the Yangtze River,while independent strong precipitation often occurs to south of it.In recent 50 years,there is a trend of getting droughty in spring in the middle and lower reaches of the Yangtze River,which has a close relationship with the temperature descent in mid-and upper-troposphere.The temperature descent induces a cyclonic anomaly in high level in the east of China,which exerts negative effect on the occurrence of precipitation. |
| Keywords: | rainfall rainy day strong precipitation successive precipitation interdecadal variation |
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