1981-2018年全球陆地0.05度短波下行辐射逐日数据

地表下行短波辐射（Downward Shortwave Radiation, DSR）是太阳辐射的重要分量，在地表辐射收支与能量平衡中起到重要作用。它是气候系统和水循环系统的主要驱动力之一，为能量平衡、农业和气候变化等研究提供了重要的数据基础。因此，陆表下行短波辐射的估算具有重要的科学研究意义。
基于MODIS地表反射率数据、TOA辐亮度数据、水汽数据等输入数据，运用查找表算法可以直接进行陆表下行短波辐射的反演，生产一套覆盖全球陆地的陆表DSR长时序产品。生产的数据通过BSRN和CMA站点数据的检验，得出其均方根误差为29.97 W/m2、相关系数为0.95，偏差值为0.94 W/m2。

Downward Shortwave Radiation (DSR) at the land surface is a critical component of solar radiation, playing a vital role in surface radiation budget and energy balance. As one of the primary driving forces of the climate system and hydrological cycle, it provides an essential data foundation for research on energy balance, agriculture, climate change and other related fields. Therefore, the estimation of land surface downward shortwave radiation holds important scientific research significance. Based on input datasets including MODIS land surface reflectance data, Top-of-Atmosphere (TOA) radiance data, water vapor data and others, the retrieval of land surface downward shortwave radiation can be directly conducted via the look-up table (LUT) algorithm, to produce a long-time-series global terrestrial DSR product covering all global land areas. The generated product was validated using observations from BSRN (Baseline Surface Radiation Network) and CMA (China Meteorological Administration) stations, with results showing a root mean square error (RMSE) of 29.97 W/m², a correlation coefficient of 0.95, and a bias of 0.94 W/m².

搜集汇总

背景与挑战

背景概述

该数据集提供了1981年8月至2018年12月期间全球陆地表面的短波下行辐射逐日数据，空间分辨率为0.05度。数据基于MODIS等多源遥感信息，采用查找表方法生成，并经过地面站点实测验证，具有高相关性（R=0.95）和较低误差（RMSE=29.97 W/m2），适用于气候、能量平衡和水循环等研究。