1981-2018年全球0.05度长波辐射逐日数据

地表长波辐射是地表辐射能量平衡的重要组分之一。本研究分别发展了陆表上行、下行长波辐射估算算法，在反演陆表上行、下行长波辐射的基础上，计算陆表长波净辐射。
对于AVHRR数据，采用算法集成的思路，集成优秀的地表下行长波辐射估算参数化方法，使用MERR2再分析数据，反演陆表下行长波辐射，使用GLASS发射率和地表温度产品，计算陆表上行长波辐射；
针对MODIS数据，发展了上行长波辐射混合算法，在此基础上，设计了一个新的下行辐射反演的参数化方法，同时探讨了上行辐射估算混合算法和温度-发射率方法的精度。
结果表明上述发展的方法具有估算全球长波辐射分量的可行性和较高的精度。因此，基于上述方法分别针对AVHRR和MODIS生产了全球第一个高时空分辨率的GLASS陆表长波辐射数据集。

Surface longwave radiation (SLR) is a critical component of the Earth's surface radiative energy balance. This study separately developed estimation algorithms for upward and downward surface longwave radiation, and calculated net surface longwave radiation based on the retrieved upward and downward SLR.
For AVHRR data, an algorithm integration framework was adopted, where excellent parametric methods for estimating downward surface longwave radiation were integrated. MERR2 reanalysis data were used to retrieve downward surface longwave radiation, while GLASS emissivity and land surface temperature products were applied to calculate upward surface longwave radiation.
For MODIS data, a hybrid algorithm for upward longwave radiation estimation was developed. On this basis, a novel parametric method for downward radiation retrieval was designed, and the accuracy of both the hybrid upward radiation estimation algorithm and the temperature-emissivity method was evaluated.
The results demonstrate that the proposed methods are feasible for estimating global longwave radiation components and achieve relatively high accuracy. Accordingly, the world's first high spatiotemporal resolution GLASS surface longwave radiation dataset was produced for AVHRR and MODIS respectively based on the aforementioned methods.

搜集汇总

背景与挑战

背景概述

该数据集提供了1981年至2018年全球范围内空间分辨率为0.05度的逐日地表长波辐射数据，包括上行、下行和净辐射分量。它基于AVHRR和MODIS卫星数据以及ERA5再分析数据，采用集成参数化和混合算法生成，是全球首个高时空分辨率的长波辐射产品，并经过多站点验证确保准确性。