念青唐古拉山拉弄冰川气象要素变化特征  

Variations of the Meteorological Elements at the Lanong Glacier in the Nyainqêntanglha Range

作　　者：孙维君[1,2] 秦翔[1,2] 化希平[2] 杜文涛[1,2] 刘宇硕[1,2] 侯典炯[1,2] 

机构地区：[1]中国科学院冰冻圈科学国家重点实验室,甘肃兰州730000 [2]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《冰川冻土》2010年第1期62-69,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(2007CB411503);科技部基础研究项目"中国冰川资源及其变化调查项目"(2006FY110200)资助

摘　　要：利用在念青唐古拉山拉弄冰川垭口架设的自动气象站观测资料,分析了2006年9月1日至2007年8月31日的气温、气压、相对湿度和风等气象要素的日和季节变化特征.结果表明:拉弄冰川垭口气温日变化呈现升温快降温慢的特点,年平均气温为-8.1℃,最冷月为2月,最暖月为7月,其温度分别为-17.6℃和0.7℃;相对湿度日变化呈单峰单谷型,年平均相对湿度为53.4%,8月最大1月最小;气压日变化呈双峰双谷型,年均气压值为497.1hPa,9月值最大2月值最小,其气压分别为501.9hPa和489.9hPa;冬春季的风速日变化比夏秋季大,年均风速为4.2m.s-1,1月最大8月最小,其风速分别为7.5m.s-1和2.5m.s-1,全年盛行以偏南风和偏北风为主,约占全年盛行风向频率的75.2%.The diurnal and seasonal variations of air temperature, air pressure, relative humidity, wind speed and wind direction from September 1, 2006 to August 31, 2007 were analyzed, using the observation data from an automatic weather station at the Lanong Glacier of the Nyainq ntanglha Range. The diurnal temperatures rise rapidly while descend slowly. The mean annual temperature is -8.1℃. The minimum temperature （-18.2 ℃） occurs in December and the maximum one （0. 3 ℃） occurs in July. The diurnal variation of relative humidity is characterized by a single peak and valley pattern. The mean annual relative humidity is 53.4%. The maximum relative humidity occurs in August and the minimum relative humidity occurs in January. However, diurnal variation of air pressure shows a pattern of double peaks and valleys. The mean annual air pressure is 497. 1 hPa with a maximum （501.9 hPa） in September and a minimum （489.9 hPa） in February. The diurnal variation of wind speed fluctuates more dramatically in the winter and spring than that in the summer and autumn. The mean annual wind speed is 4.2 m·s^-1 with a maximum （7.5 m·s^-1） in January and a minimum （2.5 m·s^-1） in August. The north and south winds prevail, which account for 75.2% of the year.

关 键 词：拉弄冰川 气象要素 日变化 季节变化 

分 类 号：P462.5[天文地球—大气科学及气象学]