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当前位置: 首页 > 文章 > 西太平洋副热带高压对黄淮海夏季区域降水异常的影响 干旱区研究 2015,32 (3) 518-525
Position: Home > Articles > Effect of Western Pacific Subtropical High on Regional Rainfall Anomalies in Summer over Huang-Huai-Hai Plain Arid Zone Research 2015,32 (3) 518-525

西太平洋副热带高压对黄淮海夏季区域降水异常的影响

作  者：
张宇;李耀辉;刘抗
单  位：
中国气象局兰州干旱气象研究所;甘肃省气象局气象服务中心
关键词：
西太平洋;副热带高压;夏季;区域降水;黄淮海
摘  要：
采用1961—2012年全国台站逐日降水观测资料,以及同期NCEP/NCAR再分析资料,通过黄淮海区域降水指数以及西太平洋副热带高压25~54候逐候脊线、强度、西脊点指数计算,分析黄淮海夏季区域降水异常,以及西太平洋副热带高压对其可能的影响方式。结果显示:1961—2012年我国黄淮海夏季区域降水相对偏少,夏季区域降水有减小趋势,且旱年出现的次数越来越多。从西太平洋副热带高压3种特征形式对比得到,脊线偏北、强度偏小,西脊点偏西时,黄淮海区域北部、东部、中部降水偏多,西部、南部降水偏少;旱年41候时西太副高表现异常强大、偏西;5月时可用强度大小和西脊点位置作为黄淮海区域各站点夏季降水预测的参考因子,6月时西脊点位置效果较好。
译  名：
Effect of Western Pacific Subtropical High on Regional Rainfall Anomalies in Summer over Huang-Huai-Hai Plain
作  者：
ZHANG Yu;LI Yao-hui;LIU Kang;Key Laboratory of Arid Climate Changing and Disaster Reducing of Gansu Province/Key Open Laboratory of Arid Climate Changing and Disaster Reducing of CMA,Institute of Arid Meteorology,China Meteorological Administration;Gansu Provincial Meteorological Service Center;
关键词：
Western Pacific;;subtropical high;;summer;;regional rainfall anomalie;;Huang-Huai-Hai Plain
摘  要：
The regional rainfall anomalies characteristic in summer over Huang-Huai-Hai in China and the effects of the Western Pacific subtropical high on it were analyzed in this paper,which using the NCEP / NCAR reanalysis data and observation data the observation station from 1961 to 2012,which by calculating the indexes of Regional Summer Rainfall over Huang-Huai-Hai and Western Pacific subtropical high( ridge line; intensity; the western ridge). Results indicated that there is: the Regional Summer Rainfall over Huang-Huai-Hai is relatively low and had reduction tendency from 1961 to 2012 in China. Drought years occurred with increasing frequency. Results were obtained by comparing characteristics of three species of the Western Pacific subtropical high. There are more rainfall on central,eastern and northern,but less rainfall on western and southern in the Huang-Huai-Hai,when the ridge line relatively Northerly,the intensity relatively low and the western ridge relatively westerly. The Western Pacific subtropical high significant showed that strengthening and westward in the 41 th pentad,which in drought year. In May,the strength and West Ridge point can be used as forecast factor reference to summer precipitation in Huang-Huai-Hai region,but in June the West Ridge point location works the best.

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