祁连山七一冰川反照率的参数化研究  

A Study of Parameterization of Albedo on the Qiyi Glacier in Qilian Mountains,China

作　　者：蒋熹[1,2,3] 王宁练[3] 贺建桥[3] 宋高举[3] 杨胜朋[1,2] 武小波[3] 

机构地区：[1]气象灾害省部共建教育部重点实验室,江苏南京210044 [2]南京信息工程大学大气科学学院,江苏南京210044 [3]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,甘肃兰州730000

出　　处：《冰川冻土》2011年第1期30-37,共8页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(409010414093052640871038);全球变化研究国家重大科学研究计划项目(2010CB951401);中国科学院"西部之光"人才培养计划项目(29O928601);南京信息工程大学科研基金项目资助

摘　　要：通过对2006年和2007年暖季消融期七一冰川反照率的观测资料分析,基于冰川反照率的变化规律及其影响因素,根据实测资料的统计建模和验证,初步给出了具有试验基础的冰川反照率多因子参数化公式,其时间分辨率为1h.经检验,2006年和2007年考察期间冰川反照率的模拟值和观测值序列之间的相关系数分别达到了0.901和0.973,平均绝对误差MAE值分别为0.073和0.038,RMSE值分别为0.089和0.052.回归拟合方法得到的冰川反照率参数化公式能较好的反映冰川反照率的日变化和日际变化情况,有望用于冰川表面能量物质平衡的模型模拟之中.Surface albedos measured with an automatic weather station on the Qiyi Glacier,China,were analyzed for the periods of June 9 to September 27,2006 and July 1 to October 9,2007.By fitting the dataset of 2007,multiple factorial parameterized formulae of the surface albedo on glacier are put forward,which modify the snow albedo of the present hour as a function of time after snowfall,air temperature and cloudiness,and ice albedo just as a function of air temperature.The dataset of 2006 is used for the validating the fitting equations.In the observation period of 2007,the correlation coefficient between the simulated and observed glacier albedo is 0.973,and the mean absolute error（MAE） and root mean squared error（RMSE） between simulations and observations are 0.038 and 0.052,respectively.However,in the observation period of 2006,the correlation coefficient is 0.901,and the MAE and RMSE are 0.073 and 0.089,respectively.In general,simulations are in good agreement with observations.In particular the diurnal and daily fluctuations of albedo on the Qiyi glacier are simulated remarkably well.The parameterized formulae got by regression fitting approach for glacier albedo can be used in the glacier surface energy and mass balance models.

关 键 词：冰川反照率 参数化 能量物质平衡模型 消融期 

分 类 号：P422.4[天文地球—大气科学及气象学]