山东夏季降水日变化特征分析  

Analysis of Daily Variation Features of Summer Precipitation in Shandong Province

作　　者：刘树棣 张录军[1] 

机构地区：[1]南京大学大气科学学院,南京210023 [2]山东省无棣县气象局,山东滨州251900

出　　处：《湖北农业科学》2016年第16期4165-4168,4219,共5页Hubei Agricultural Sciences

摘　　要：基于1999-2013年山东省122个台站观测的逐时降水数据,分析了山东省夏季（6~8月）降水量、降水频次、降水强度和降水持续性的日变化特征。结果表明,山东省降水量和降水频次的日变化均表现为清晨主峰值和下午次峰值并存的特征,峰值区出现时间各地区较为一致,但低值区出现时间各地区略有差异;降水强度的日变化表现为多峰并存的特征,鲁西北、鲁中北部和鲁西南部分地区在傍晚前后降水强度较大,半岛和鲁东南的沿海地区则在凌晨或清晨降水强度较大。山东降水主要以短持续性降水为主,短持续性降水对总降水量的贡献较长持续性降水大。短持续性降水降水量在傍晚前后出现大值,长持续性降水降水量在清晨出现大值。短持续性降水多发于清晨和午后至傍晚,长持续性降水多发生于凌晨或清晨,尤其以6：00为最多。On the basis of the hourly precipitation data observed at 122 meteorological stations in Shandong province from1999 to 2013, the daily variation features of precipitation, precipitation frequency, precipitation intensity and precipitation duration were analyzed in Shandong province during summer（from June to August）. The results indicated that the daily variation of precipitation and precipitation frequency in Shandong province was characterized by the coexistence of main peak value in the early morning and secondary peak value in the afternoon. The occurrence time of peak value zone was relatively unanimous from region to region, but the occurrence time of low value zone slightly differs from region to region; The daily variation of precipitation intensity was featured by the coexistence of multiple peaks. The precipitation intensity in northwest Shandong, north central Shandong, and southwest Shandong was relatively strong around nightfall. The precipitation intensity in coastal areas of the Shandong Peninsula was comparatively strong before dawn or in the early morning. The precipitation in Shandong province was mainly dominated by persistent precipitation and shortly persistent precipitation had a greater contribution to the total precipitation than lastingly persistent precipitation. The maximum value of shortly persistent precipitation appeare around nightfall and lastingly persistent precipitation occurs in the early morning. Shortly persistent precipitation usually happened in the early morning and afternoon till the nightfall. Lastingly persistent precipitation often occurs before dawn or early in the morning, especially at 6 o＇clock.

关 键 词：降水量 降水频次 降水强度 降水持续性 日变化 

分 类 号：P426.6[天文地球—大气科学及气象学] P467