第三极地区冰川反照率数据集（2001-2020, 500m）

该数据集是第三极地区2001到2020年冰川反照率的半月合成产品，空间分辨率为500米，合成方式采用均值合成，每年24期，共计480期。本数据集是基于Aqua/Terra-MODIS卫星传感器的反射率数据（MOD09GA/MYD09GA），采用自主发展的考虑冰雪表面各向异性反射特性的冰川反照率遥感反演算法生成。经评估，该数据与冰面实测数据及其它高分辨率遥感数据具有良好的一致性，能够准确获取冰川反照率的年内及年际变化。该数据集能够为第三极地区冰川变化的归因分析、冰川模型的校准及验证等工作提供数据参考。

This dataset is a biweekly composite product of glacier albedo in the Third Pole region spanning 2001 to 2020, with a spatial resolution of 500 meters. The composite method adopts mean value synthesis, generating 24 periods per year and totaling 480 periods across the 20-year timeframe. It is developed based on the reflectance data (MOD09GA/MYD09GA) from the Aqua/Terra-MODIS satellite sensors, using an independently established remote sensing retrieval algorithm for glacier albedo that considers the anisotropic reflection characteristics of ice and snow surfaces. Validation results demonstrate that this dataset exhibits good consistency with in-situ ice surface measurements and other high-resolution remote sensing data, and can accurately capture the intra-annual and inter-annual variations of glacier albedo. This dataset can provide reliable data references for attribution analysis of glacier changes, calibration and validation of glacier models, and other related research in the Third Pole region.

搜集汇总

背景与挑战

背景概述

该数据集是第三极地区2001年至2020年冰川反照率的半月合成产品，空间分辨率为500米，基于Aqua/Terra-MODIS卫星反射率数据生成，采用考虑冰雪表面各向异性反射特性的算法。数据集包含480期数据，用于分析冰川反照率的年内和年际变化，支持冰川变化归因及模型校准验证工作。