中国高时空分辨率地表太阳辐射数据集（2007-2014）

该数据集包含2007-2014年地表太阳辐射数据，时间分辨率为逐小时，空间分辨率为5km。每个小时对应一个文件，文件命名方式为: RAD_yyyymmddhh.dat，其中yyyy表示年，mm表示月，dd表示日，hh表示小时（世界时）。经度（X轴）格点：70.025:0.05:140.025，纬度（Y轴）格点：59.975:-0.05:14.975。文件为二进制文件，格式为float格式（real*4），没有头文件。
该数据集的获取分为三步：（1）融合极轨卫星MODIS 和日本静止气象卫星MTSAT 资料，发展适合MTSAT的云检测算法及MTSAT云属性信息（有效粒子半径和路径含水量）的估算方法；（2）发展以云属性、气溶胶、水汽和臭氧等信息为输入的宽波段辐射模型，形成高效快速的地表太阳辐射反演技术；（3）将获取的高分辨率云参数信息和其他要素(气溶胶、水汽、臭氧等)输入宽波段辐射传输模型,最终得到中国高时空地表太阳辐射数据集。
经验证，瞬时辐射均方根误差（RMSE）一般小于 100 W/㎡，日平均辐射均方根误差（RMSE）一般小于 35 W/㎡。

This dataset contains surface solar radiation data from 2007 to 2014, with an hourly temporal resolution and a 5 km spatial resolution.
Each hour corresponds to one file, which follows the naming convention: RAD_yyyymmddhh.dat, where yyyy denotes the four-digit year, mm the two-digit month, dd the two-digit day, and hh the two-digit hour in Universal Time.
The longitude (X-axis) grid is defined as 70.025:0.05:140.025, and the latitude (Y-axis) grid is defined as 59.975:-0.05:14.975.
The files are binary files in float (real*4) format, with no header file.

The acquisition of this dataset consists of three steps: (1) Fusing data from the polar-orbiting satellite MODIS and the Japanese geostationary meteorological satellite MTSAT, developing a cloud detection algorithm suitable for MTSAT and estimation methods for MTSAT cloud attribute information including effective particle radius and cloud water path; (2) Developing a broadband radiation model that takes cloud attributes, aerosols, water vapor, ozone and other related information as inputs, and forming an efficient and fast inversion technology for surface solar radiation; (3) Inputting the acquired high-spatiotemporal-resolution cloud parameter information and other elements (aerosols, water vapor, ozone, etc.) into the broadband radiative transfer model, and finally obtaining the high-spatiotemporal-resolution surface solar radiation dataset over China.

Validation results indicate that the root mean square error (RMSE) of instantaneous radiation is generally less than 100 W/m², and the RMSE of daily average radiation is generally less than 35 W/m².

搜集汇总

背景与挑战

背景概述

该数据集是中国地区2007-2014年的地表太阳辐射数据，具有逐小时时间分辨率和5公里空间分辨率的高时空精度特点。数据通过融合MODIS和MTSAT卫星资料，采用先进的云检测和宽波段辐射模型技术反演生成，经验证瞬时辐射均方根误差一般小于100 W/㎡，日平均误差小于35 W/㎡，确保了数据的科学可靠性。