一次降雪的积雪密实化过程研究  

Study on snow densification process after a snowfall

作　　者：刘宝河[1] 左合君[1] 董智[2] 王嫣娇 杨阳[1] 闫敏[1] 李钢铁[1] LIU Baohe ZUO Hejun DONG Zhi WANG Yanjiao YANG Yang YAN Min LI Gang- tie(Inner Mongolia Agricultural University,Hohhot 010019, China Shandong Agricultural University,Taian 271018, China)

机构地区：[1]内蒙古农业大学生态环境学院,呼和浩特010019 [2]山东农业大学林学院,泰安271018

出　　处：《干旱区资源与环境》2017年第1期178-184,共7页Journal of Arid Land Resources and Environment

基　　金：国家自然基金(41361012)资助

摘　　要：通过对呼和浩特市冬季一次降雪后积雪厚度和积雪密度两个指标的持续测量,研究了观测期18d内的积雪密实化过程,分时段和观测时间点对两个指标的变化过程进行对比分析。结果表明:比较发现积雪厚度具有更好的阶段变化特征,因此依据积雪厚度划分法,将积雪密实化过程分为剧烈变化期(前24h)、快速变化期(24h-48h)和稳步发展期(48h之后)三个阶段。其中剧烈变化期和快速变化期分别完成整个积雪密实化过程的52.63%和12.17%,说明积雪在前期较短时间内快速密实;短期内不同观测时间点的积雪密度由于受气温的主要影响出现小幅波动,14:00测得的积雪密度值最高,8:00和20:00差别不大。相关研究结果可为季节性积雪区积雪资源的估算与利用提供理论依据。This research analyzed the dynamics of snow densification in an 18 -day period after snowfall in Hohhot. The results indicated that the snow densification process could be classified into very fast, fast and slow stages according to the variation of snow depth and snow density. In the very fast stage （ the early 24 hours after snow fall） , 52.63% of densification was taken place. In the fast stage （between 24 to 48hours after snow fall）, 12.17% of the densification was taken place. The remaining densification was taken place in the slow stage （ after 48 hours after snow fall）. From short -time observation, the densification process reached the highest at 14： 00 o＇clock and the lowest at 8：00 o＇clock and 20：00 o＇clock. The results could provide a theoretical basis for the estimation, utilization and management of snow resources.

关 键 词：积雪厚度 积雪密度 气温 季节性积雪 

分 类 号：P426.63[天文地球—大气科学及气象学]