1961-2010年中国ngstr?m-Prescott系数时空变化特征  

Spatial and Temporal Change Characteristics of ngstr?m-Prescott Coefficients in China in 1961—2010

作　　者：毛飞[1] 赵玉金[2] 孙涵[3] 邵鹏[4] 廖树华[5] 姜会飞[5] 郑小波 

机构地区：[1]中国气象科学研究院,北京100081 [2]山东省气候中心,济南250031 [3]广西气象减灾研究所,南宁530022 [4]中国气象局华风气象传媒集团,北京100081 [5]中国农业大学,北京100094 [6]贵州省山地环境气候研究所,贵阳550002

出　　处：《气象与环境科学》2016年第1期43-51,共9页Meteorological and Environmental Sciences

基　　金：公益性行业(气象)科研专项(GYHY201306046);国家科技支撑计划项目(2012BAD20B02);中国气象科学研究院基本科研业务费专项(2013Z008)资助

摘　　要：利用中国51个站1961-2010年和94个站2001-2010年的逐日总辐射和日照时数资料,基于目前最常用的AngstrOm-Prescott公式,采用最小二乘法计算各站历年逐月a、b系数,分析其时空变化规律,主要结果表明：各地a、b系数均存在不同程度年变化,a系数与b系数呈反向变化,b系数的年变化幅度大于a系数;我国不同季节的多年平均a＋b系数随海拔升高而增加;近50 a来,全国不同季节多数站的b和a＋b系数呈减少趋势,a系数呈增加趋势（春季除外）,37%-63%的站,其变化趋势通过0.05的显著性检验;华北地区四季的a＋b系数均呈减少趋势,海口站四季的a、b和a＋b系数均呈增加趋势;全国各区域逐月a、b系数近50 a平均值与近10 a平均值存在一定的差异,其中华北地区a＋b值10月至下一年4月近10 a平均值小于近50 a平均值;全国大部分地区雾霾天气在加重,尤其是华北地区。给出了我国不同区域不同年代逐月的a、b系数参考值,为相关领域的理论研究和实际应用提供基础信息支撑。Using daily total radiation and sunshine time data of 51 stations from 1961 to 2010 and 94 stations from 2001 to 2010 in China and the most commonly used AngstrOm-Prescott formula,the monthly a and b coefficients on every year in each station were calculated based on the least square method. Spatial and temporal distribution of the coefficients were analyzed. The mainly results showed that： there were different degree annual changes of a and b coefficients in each station. The annual changes of a and b coefficients showed reverse change. The annual variation amplitudes of b coefficients were greater than a coefficients. The multi-year average a ＋ b values increased with altitude in different seasons in China. From1961 to 2010,a coefficients in most stations increased in different seasons（ except spring）,while b coefficients and a ＋ b values in most stations decreased. 37% —63% of the total stations passed 0. 05 confidence test. a ＋ b values in different seasons decreased in North China. a、b coefficients and a ＋ b values in different seasons increased in Haikou station. There were some differences between monthly a and b coefficients for recent 50-year average and 10-year in different regions of China. In North China,the a ＋ b values from October to following April for recent 10-year average were less than those for recent 50-year average. The fog and haze weather is increasing in most parts of China,especially in North China. The a and b coefficients for different ages in different regions of China were given in the paper,to provide basic information support for the theoretical research and practical application on related fields.

关 键 词：AngstrOm-Prescott系数 中国 时空变化 

分 类 号：P422.1[天文地球—大气科学及气象学]