青藏高原区域耦合地形效应的日地表反照率数据集（2002-2022）

本数据集为青藏高原区域2002-2022年日分辨率0.005° x0.005°地表反照率产品。基于MODIS反射率数据，采用耦合地形因子的多源遥感数据协同反演的BRDF\反照率模型，并引入先验知识进行质量控制，反演时空连续的日分辨率的高精度BRDF/反照率。MODIS地表反射率数据（MOD09GA、MYD09GA）集为官方网站下载，以5天为周期合成日分辨率BRDF，进而估算日分辨率的反照率，其中，黑空反照率的太阳入射为当地正午时太阳入射。经过验证评估，满足反照率应用精度要求，相较于同类产品在山区站点的验证精度更高，且时空连续性更好。可有效支撑青藏高原地区辐射平衡、环境变化研究。

This dataset is a daily-resolution (0.005° × 0.005°) surface albedo product for the Qinghai-Tibet Plateau region covering the period from 2002 to 2022. Based on MODIS surface reflectance data, this product uses a BRDF/albedo inversion model that synergizes multi-source remote sensing data and incorporates topographic factors, with prior knowledge introduced for quality control, to retrieve high-precision, spatio-temporally continuous daily-resolution BRDF and albedo products. The MODIS surface reflectance datasets (MOD09GA, MYD09GA) were downloaded from official online repositories. Daily-resolution BRDF products were synthesized using a 5-day composite cycle, based on which daily-resolution albedo was estimated. Specifically, the solar incident radiation for black-sky albedo is defined as the radiation at local solar noon. Through validation and assessment, this product meets the accuracy requirements for albedo-related applications. Compared with other similar products, it achieves higher validation accuracy at mountainous sites and shows better spatio-temporal continuity. This dataset can effectively support research on radiation balance and environmental change in the Qinghai-Tibet Plateau region.

搜集汇总

背景与挑战

背景概述

该数据集提供了青藏高原区域2002-2022年日分辨率的地表反照率产品，空间分辨率为100m至1km，数据格式为tif，总大小为694.82 GB。基于MODIS反射率数据，采用耦合地形因子的多源遥感数据协同反演模型，具有较高的验证精度和时空连续性，适用于青藏高原地区辐射平衡和环境变化研究。