祁连山老虎沟冰川积累区风速、风向变化特征研究  

Wind Characteristics in Accumulation Area of the Laohugou Glacier No.12,Qilian Mountains

作　　者：杜文涛[1] 秦翔[1] 孙维君[1] 刘宇硕[1] 侯典炯[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所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》2012年第1期29-36,共8页Journal of Glaciology and Geocryology

基　　金：国家重点基础研究发展计划(973计划)项目(2007CB411501);国家自然科学基金项目(47011046);国家自然科学基金委基础人才培养基金冰川学冻土学特殊学科点(J0630966/J0109);中国科学院寒区旱区环境与工程研究所青年基金项目(51O984821)资助

摘　　要：基于2008年11月—2009年10月祁连山老虎沟12号冰川积累区的风速、风向观测资料,分析了年内季节和日变化特征.结果表明:全年日平均风速波动较大,介于1～8.8m.s-1.日均值以冬季最大,春、秋季次之,夏季最小,分别为5.1m.s-1,3.4m.s-1,3.7m.s-1,2.6m.s-1,表现出典型的"高山型"风速特征.秋、冬季节,无论昼夜,以偏南风为主,风速始终保持在较为稳定的高值状态,属于典型的冰川风;春、夏季节,冰川风场依旧强劲,而且伴有山谷风出现.受山系-河谷地形及雪冰下垫面的共同作用,春、夏、秋三季表现出一定的偏东风,柴达木低压可能对此也有贡献.Base on the observations of wind speed and direction in the accumulation area of the Laohugou Glacier No.12,Qilian Mountains（39°25′39.5″ N,96°33′21.8″ E,and 5 040 m a.s.l.）,from November 2008 to October 2009,the characteristics of averaged diurnal and seasonal variations of wind speed and direction are analyzed.It is found that the diurnal fluctuation is obvious,ranging from 1 to 8.8 m·s-1.The maximum diurnal average speed is found in winter（5.1 m·s-1）,smaller speeds are observed in spring（3.4 m·s-1） and autumn（3.7 m·s-1）,and the minimum is detected in summer（2.6 m·s-1）,showing a typical alps wind speed characteristics.In autumn and winter,controlled by partial-south wind direction and stable high wind speed,the accumulation area prevails typical glacier wind,whereas,in spring and summer the glacier wind field is strong and sometimes accompanied with valley wind.Affected by the terrain（mountain-valley） and land cover condition（snow-ice underlying surface）,easterly wind may appear in spring,summer and autumn,which is possibly attributed to the Qaidam low pressure.

关 键 词：老虎沟积累区 风速 风向 变化 

分 类 号：P425.5[天文地球—大气科学及气象学]