摘要
中国中西部地区年降水量空间分布数据集(2010)是采用混合插值法进行高精度曲面建模(High Accuracy Surface Modeling,HASM)区域降水模拟的数据结果。该方法包括三个步骤:首先使用TRMM数据(或者站点观测值空间插值结果)代表降水在空间中变化平稳的部分,即趋势面;然后结合地面站点观测值,计算去除趋势面后的残差值,并利用HASM对残差进行插值,得到空间中变化不平稳的残差场;最后将趋势面与残差场进行加和,完成插值计算。结果表明,TRMM作为背景场的HASM模拟精度明显高于传统插值方法,适应性较好。采用平均绝对误差(Mean Absolute Error,MAE)和均方根误差(Root Mean Square Error,RMSE)作为精度评价指标完成精度验证。在全局尺度上,MAE和RMSE分别为125.15、155.80 mm;在局部尺度上,MAE和RMSE分别为167.53、228.81 mm。与本数据集相关的科学发现论文已发表在《地球信息科学学报》2015年第17卷第8期。
The dataset on the spatial distribution of annual precipitation in midwestern China(2010)is a simulation of regional precipitation with High Accuracy Surface Modeling(HASM).The method includes three steps:First,use the TRMM data(or station observations spatial interpolation results)to represent the stable change of precipitation in space,that is,the trend surface;second,calculate residue combined with station observations after removing the trend surface,and then incorporate residue in HASM to form unstable changed residual field in space;finally,add the trend surface and residual field to complete incorporation.The results show that HASM model with TRMM as the background field is significantly more precise and adaptive than traditional interpolation methods.Mean absolute error(MAE)and root mean square error(RMSE)are the accuracy evaluation indicator.The MAE and RMSE of TRMM based HASM simulation were 125.15 mm and 155.80 mm on a global scale and 167.53 mm and 228.81 mm on a local scale,respectively.Related research results were published in Journal of Geo-Information Science(Vol.17,No.8,2015).
作者
蒋育昊
李宝林
袁烨城
高锡章
张涛
刘岩
李影
李红
罗智勇
马强
王晓敏
次仁多吉
Jiang,Y.H.;Li,B.L.;Yuan,Y.C.;Gao,X.Z.;Zhang,T.;Liu,Y.;Li,Y.;Li,H.;Luo,Z.Y.;Ma,Q.;Wang,X.M.;Ciren,D.J.(State Key Laboratory of Resources and Environmental Information Systems,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;Meteorological Bureau of Mongolian Autonomous County of Henan,Tibetan Autonomous Prefecture of Huangnan,Henan 811599,China;Lhasa Meteorological Bureau,Lhasa 850000,China)
出处
《全球变化数据学报（中英文）》
CSCD
2019年第4期343-348,450-455,共12页
Journal of Global Change Data & Discovery
基金
中华人民共和国科学技术部(2016YFC0500205,2015CB954103).
关键词
降水
TRMM卫星
高精度曲面建模
中国中西部地区
地球信息科学学报
precipitation
TRMM satellite
high accuracy surface modeling
midwestern China
Journal of Geo-Information Science
