祁连山老虎沟12号冰川消融区不同天气条件下的能量收支特征  

Characteristics of energy budget under different weather conditions in the ablation area of the Laohugou Glacier No. 12,Qilian Mountains

作　　者：张佳佳 孙维君 杜文涛 陈记祖 秦翔 ZHANG Jiajia;SUN Weijun;DU Wentao;CHEN Jizu;QIN Xiang(College of Geography and Environment,Shandong Normal University,Jinan 250014,China;State Key Laboratory of Cryospheric Science/Qilian Shan Station of Glaciology and Ecologic Environment,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]山东师范大学地理与环境学院,山东济南250014 [2]中国科学院西北生态环境资源研究院冰冻圈科学国家重点实验室/祁连山冰川与生态环境综合观测研究站,甘肃兰州730000

出　　处：《冰川冻土》2020年第2期332-343,共12页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(41971073,41701059,41401040);中国科学院前沿科学重点研究项目(Y77R0400YD);中国博士后科学基金项目(40411594);山东师范大学人才引进科研基金资助。

摘　　要：冰川表面能量平衡模型建立了冰川与大气之间的联系。为探讨不同天气条件对冰川能量收支的影响,利用祁连山老虎沟12号冰川海拔4 550m处的气象资料(2011年8月24日-9月6日),结合能量平衡模型,分析了不同天气条件下的能量收支变化特征。结果表明:受云量影响,晴天条件下向下短波辐射(318.3W·m-2)是多云条件下的1.5倍,是阴天条件下的3倍。三种天气条件下的向下长波辐射,晴天(215.4W·m-2)<多云(267.4W·m-2)<阴天(291.6W·m-2)。受固态降水的影响,阴天条件下冰川反照率(0.50)是晴天时的2倍多。而三种天气下的最大消融耗热,晴天(739.6W·m-2)>多云(582.8W·m-2)>阴天(324.5W·m-2)。在能量收入项中,净短波辐射是主要来源(98%),但是受天气条件影响,能量支出各项所占比例有明显差异;在三种天气条件下,净长波辐射所占比例分别为35%、31%和23%,消融耗热所占比例分别为62%、64%和75%,潜热通量所占比例相差不大。The connection between the glacier and the atmosphere was established by the energy balance model.Based on the meteorological data from August24 to September6,2011,at the elevation of4 550 m of the Laohugou Glacier No.12 in the Qilian Mountains,the characteristics of energy budget under different weather conditions were analyzed by the energy balance model. It is found that,the downward short wave radiation on fine days(318.3 W·m-2)is about1.5 times as much as that on cloudy days and three times as much as that on overcast days. With the variation of weather conditions from fine to cloudy,the downward long wave radiation shows an increasing trend. Downward long wave radiation in fine days(215.4 W·m-2)< downward long wave radiation in cloudy days(267.4 W·m-2)< downward long wave radiation in overcast days(291.6 W·m-2).Due to the influence of solid precipitation,the glacier albedo in overcast days(0.50)is more than twice as large as in fine days. Maximum ablation heat consumption in fine days(739.6 W·m-2)> maximum ablation heat consumption in cloudy days(582.8 W·m-2)> maximum ablation heat consumption in overcast days(324.5 W·m-2). Net short wave radiation(98%)is the main source of energy income. However,there is significant differences in the proportion of energy output due to weather conditions. Under the three weather conditions,the proportion of net long wave radiation is35%,31% and23%,respectively. The proportion of ablation heat consumption reached62%,64% and75%,respectively. The proportion of latent heat flux varied little.

关 键 词：老虎沟12号冰川 消融区 不同天气条件 能量收支 

分 类 号：P343.6[天文地球—水文科学]