摘要
利用Snow Fork雪特性分析仪采集积雪物理特性(积雪深度、积雪密度、体积含水率)数据,分析了天山积雪雪崩站稳定积雪期和非稳定积雪期雪物理特性的时间变化特征及其在垂直剖面上的廓线分布.结果表明:1)稳定期积雪深度随时间缓慢减小,体积含水率垂直廓线随积雪深度变化呈单峰曲线,峰值距雪表面约33cm,雪密度垂直廓线为中部大、积雪表层和底部较小;2)非稳定积雪期积雪迅速沉陷,体积含水率相对于雪层温度的变化有滞后效应,滞后时间约为2h,雪密度垂直廓线与稳定期相同.整个非稳定积雪期的日平均雪密度与日平均含水率、日平均温度均呈显著正相关.
In this paper,the time serials of snow parameters in the stable and unstable periods and snow features within the snow cover profiles are discussed,base on the data collected from Tianshan Station by Snow Fork.It is found that the snow depth in the stable period reduces slowly,opposite to that in the unstable period.In the stable period,maximum liquid water content takes place at 33 cm below the surface.While in the unstable period,the liquid water content has distinct positive relation to the snow temperature two hours ahead.The snow density at the top and bottom is smaller than that at the middle.The snow density in the unstable period has positive relation to the liquid water content and air temperature.
出处
《冰川冻土》
CSCD
北大核心
2010年第4期786-793,共8页
Journal of Glaciology and Geocryology
基金
公益性行业(气象)科研专项项目(GYHY200706008)
新疆生态与地理研究所绿洲学者"博士"人才培养计划(0771021)资助
关键词
积雪深度
积雪密度
体积含水率
剖面温度
snow depth
snow density
liquid water content by volume
snow temperature profile
