| 摘要: |
| 应用1961～1998年的山东省40个代表站夏季降水资料及NCAR/NCEP再分析月平均资料,分析了山东夏季降水的气候特征,并对旱涝年的大气环流异常进行了合成对比分析。结果表明:山东夏季降水整体表现为旱涝同步,降水分布呈现由东南向西北递减的趋势。涝年与旱年的环流形势存在明显的差异:涝年,贝加尔湖及其以西地区的位势高度降低,我国东部到日本海的位势高度明显升高。东亚大槽、乌拉尔山阻高、副热带高压位置及强度的变化对山东夏季降水有重要影响。有三支暖湿气流在山东上空交汇,为降水提供了充沛的水汽来源;而在旱年,上述环流特征呈现相反的形势。 |
| 关键词: 旱涝 气候特征 大气环流 |
| DOI： |
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| THE CLIMATE CHARACTERISTIC OF PRECIPITATION AND ORIGIN CAUSE OF FORMATION IN SUMMER OF SHANDONG PROVINCE |
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YANG Shi-en1, WANG Qi2
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1.Liaocheng Meteorological Office, Shandong Province, Liaocheng 252060, China;2.Ocean University of China, Qingdao 266003, China
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| Abstract: |
| By using monthly averaged NCEP/NCAR reanalysis data of the atmospheric circulation and the data of summer precipitation in 40 meteorological stations in Shandong province from 1961 to 1998,the climate characteristics of precipitation in the summer of Shandong are analyzed,and the atmospheric circulation anomalies of drought and flood have been compared and analyzed.The result show that the basic precipitation pattern is in phase with each part of the whole province.The summer rainfall is degressive from southeast to northwest of the province.An obvious difference exists with the circulation situation between years of drought and flood.In the years of flood,the East Asia Trough,Ural Blocking High and Western North Pacific Subtropical High are very important systems influencing the summer precipitation.Three warm,wet air currents meet over Shandong and offer plentiful water vapor for precipitation.Opposite situation appears in the above circulation characteristic in the years of drought. |
| Key words: drought and flood climate characteristics atmospheric circulation |
