北疆汛期降水集中程度的特征分析  

Analysis of the Precipitation Concentrative Degree Characteristics during Flood Season in Northern Xinjiang

作　　者：赵勇[1] 闵屾[2] 秦贺 杨青[1] 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [2]南京大学大气科学学院,江苏南京210093 [3]新疆气象台,新疆乌鲁木齐830002

出　　处：《沙漠与绿洲气象》2011年第3期6-11,共6页Desert and Oasis Meteorology

基　　金：公益性行业(气象)科研专项(201106006);中央级科研院所基本科研业务费专项(IDM200804);中国气象局气候变化专项(CCSF-09-20);新疆维吾尔自治区自然科学基金(200821176)联合资助

摘　　要：基于1961—2007年新疆北部43站逐日降水资料,分析了天山山区、天山北麓、伊犁河谷和北疆北部汛期降水集中度和集中期的气候特征。结果表明,北疆北部汛期降水总量虽然最小,但年际变化较大。天山山区汛期降水总量虽然最大,但年际变化较小,说明山区降水稳定。北疆以及4个子区域多年平均的汛期降水集中度约为0.2左右,汛期降水集中期出现在32~37候。北疆北部汛期降水集中度和集中期的年际变化均相对较大。北疆地区汛期降水偏多时,降水量在整个汛期分布比较均匀,而汛期降水偏少时,降水量比较集中。Based on daily rainfall data of 43 stations in Xinjiang in 1961-2007,the climatic characteristics of precipitation concentration degree（PCD） and precipitation concentration period（PCP） in flood season in Tianshan Mountains,northern foot of Tianshan Mountain areas,Yili River valley areas and the north of northern Xinjiang were analyzed.The results showed that the total precipitation in flood season in the north of northern Xinjiang was the least with higher annual variation,however,that in the Tianshan mountains areas was the biggest with lower annual variation,which indicated that the precipitation in the mountainous area was stable.The mean PCD in northern Xinjiang and four sub-areas during the flood season was about 0.2,and the mean PCP in flood season was during the 32nd to 37th pentad.The annual variations of PCD and PCP in flood season in the north of northern Xinjiang were relatively more prominent than that in other areas.When the precipitation anomaly in northern Xinjiang was positive throughout the flood season,the precipitation distribution was uniformity,while when it was negative,the precipitation distribution was concentrative.

关 键 词：汛期 降水集中度 降水集中期 北疆 

分 类 号：P468.024[天文地球—大气科学及气象学]