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冰川冻土  2015 

新疆伊犁河谷夏季降水日变化特征

DOI: 10.7522/j.issn.1000-0240.2015.0040, PP. 369-375

Keywords: 伊犁河谷,夏季降水,降水日变化,降水频次,降水强度

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Abstract:

基于2007-2011年伊犁河谷4个气象站逐时降水资料,分析了伊犁河谷夏季降水日变化特征.结果表明降水量最大值出现在北京时间2200,最小值出现在1300,其中,降水量高值区主要集中在2100至次日0800.一天中最易发生降水的时间为2300至次日1000,0300是降水频数最多的时刻,1600则发生频数最少.降水强度最高值出现在1600,最低值出现在1300.降水主要以短持续时间的降水为主,持续1h的次数最多,持续2h的降水量最多,对总降水量的贡献也最大,贡献率最小的为持续14h的降水事件.伊犁河谷夏季的降水主要发生在夜间,且以短时间的降水为主.

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