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-  2011 

季节性森林积雪融雪期雪层含水率垂直廓线与时间变化特征

DOI: 10.11821/yj2011070010

Keywords: 融雪期,雪层含水率,垂直廓线,日变化

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Abstract:

摘要: 利用snow fork雪特性分析仪测量天山积雪与雪崩研究站融雪期开阔地(站区内气象观测场)与雪岭云杉林下雪层含水率,分析季节性森林积雪融雪期雪层含水率垂直廓线和时间变化特征以及与气温的关系。结果表明:由于开阔地和林下积雪接受的太阳辐射、雪层密度和雪层污化程度等的不同,开阔地、树冠边缘及距树干1m处的雪层含水率垂直廓线特征、雪层含水率的日变化特征以及融雪期雪层含水率随时间的变化特征各异;雪层含水率受气温因子影响最大,融雪期雪层含水率随气温变化呈指数增加,由于开阔地和林下微气象条件的不同,三点雪层含水率对日均温、最高温、最低温、日较差以及逐时气温的响应也不同,且雪层含水率对气温的滞后效应也各异

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