地理研究 ›› 2011, Vol. 30 ›› Issue (7): 1244-1253.doi: 10.11821/yj2011070010

• 气候与全球变化 • 上一篇    下一篇

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

陆恒1,2, 魏文寿3, 刘明哲1,4, 韩茜1,2, 洪雯1,2   

  1. 1. 中国科学院新疆生态与地理研究所,乌鲁木齐 830011;
    2. 中国科学院研究生院,北京 100049;
    3. 中国气象局乌鲁木齐沙漠气象研究所,乌鲁木齐 830002;
    4. 中国科学院天山积雪雪崩研究站,乌鲁木齐 830011
  • 收稿日期:2010-08-01 修回日期:2010-10-12 出版日期:2011-07-20 发布日期:2011-07-20
  • 通讯作者: 魏文寿(1954-),男,研究员,博士生导师,主要从事环境荒漠环境与气候变化研究。 E-mail:weiwsh@idm.cn E-mail:weiwsh@idm.cn
  • 作者简介:陆恒(1986-),男,四川广元人,研究生,主要从事积雪和气候变化方向研究。 E-mail:luhengwzs@163.com
  • 基金资助:

    干旱内陆区冰雪资源动态监测与可持续利用评估研究(GYHY200706008);新疆现代与历史暖湿化过程及对生态环境影响(2005DIB6J113);新疆生态与地理研究所绿洲学者"博士"人才培养计划(0771021);中国科学院"西部之光"人才培养计划(RCPY200902)

A study on the vertical profile of forest snow liquid water content and variation with time in the snowmelt period

LU Heng1,2, WEI Wen-shou3, LIU Ming-zhe1,4, HAN Xi1,2, HONG Wen1,2   

  1. 1. Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Institute of Desert Meteorology, CMA, Urumqi 830002, China;
    4. Tianshan Station for Snow & Avalanche Research, Urumqi 830011, China
  • Received:2010-08-01 Revised:2010-10-12 Online:2011-07-20 Published:2011-07-20

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。

关键词: 融雪期, 雪层含水率, 垂直廓线, 日变化

Abstract: Snow liquid water content under crown and in the open ground were measured by a portable instrument(snow fork) in Tianshan Research Station for Snow-cover and Avalanche of Chinese Academy of Sciences (TRS) during the snowmelt period from Mar 29, 2010 to Apr 3, 2010. The vertical profile of snow liquid water content, diurnal variation and variation trends in snow period of the snow layer's water content and their relationships with the air temperature were analyzed. The results indicated that due to the discrepancy of solar radiation, snow density and pollution on surface between open ground and forest, the vertical profile of snow liquid water content, the daily variation and variation trend in the snowmelt period of the snow layer's liquid water content present different characteristics in the open ground, under the edge of crown and at 1m to the tree trunk. Air temperature is the most important factor that influences the snow liquid water content which is exponentially correlated to the air temperature, additionally water content responds differently to the average daily temperature, maximum temperature, minimum temperature, diurnal temperature range and hourly temperature as well as the difference of water content lag to air temperature in the different circumstances of under crown and in the open ground.

Key words: snowmelt period, snow liquid water content, vertical profile, daily variation