Improved 8-day version 6.1 Terra–Aqua MODIS cloud-free snow cover and Randolph Glacier Inventory 6.0 product for high-mountain Asia between 2002 and 2022

The product contains improved MODIS 8-day Terra (MOD10A2) and Aqua (MYD10A2) collection 6.1 snow-cover composite product merged with Randolph Glacier Inventory (RGI6.0). The product is generated using MODIS Terra and Aqua 8-day snow cover products MOD10A2 and MYD10A2 collection 6.1 (C61), respectively. The data covers High Mountain Asia (HMA) covering latitude 24.32 − 49.19 N and Longitude 58.22 − 122.48 E. The data is available with eight-day temporal resolution and 500 m spatial resolution covering the period between 2002 and 2022. The name of the product is derived from MODIS Terra (MOD) MODIS Aqua (MYD), and Glacier (GL), Version 6.1 (61) as M*D10A2V61GL. The product is described in ordinal date and there are 46 eight-day composite images each year in GeoTIFF file format. The data is described by the values: 25 - No Snow classes, 50 - Cloud, 198 - Snow only in Terra, 199 - Snow only in Aqua, 200 - Snow in both Terra and Aqua, 238 - Debris-covered ice with Terra Snow, 239 - Debris-covered ice with Aqua Snow, 240 - Exposed debris-covered ice, 242 - Debris-covered ice with Snow in both Terra and Aqua, 248 - Debris-free ice with Terra Snow, 249 - Debris-free ice with Aqua Snow, 250 - Exposed debris-free ice, 252 - Debris-free ice with snow in both Terra and Aqua.

本数据集包含经过改进的中分辨率成像光谱仪（MODIS）Terra卫星8天合成积雪产品MOD10A2与Aqua卫星8天合成积雪产品MYD10A2的第6.1版（Collection 6.1，C61）数据，并与兰道夫冰川目录6.0版（Randolph Glacier Inventory, RGI6.0）进行了融合。本数据集的制作分别采用了MODIS Terra与Aqua卫星的第6.1版（C61）8天合成积雪产品MOD10A2和MYD10A2。数据覆盖高亚洲地区（High Mountain Asia, HMA），地理范围为北纬24.32°至49.19°、东经58.22°至122.48°。该数据集的时间分辨率为8天，空间分辨率为500米，时间跨度为2002年至2022年。本数据集名称由MODIS Terra（缩写MOD）、MODIS Aqua（缩写MYD）、冰川（Glacier，GL）以及第6.1版（61）组合而来，命名格式为M*D10A2V61GL。数据采用序数日期进行标注，每年包含46幅8天合成影像，文件格式为GeoTIFF。数据通过以下像素值表征各类别：25代表无雪类别，50代表云覆盖，198代表仅Terra卫星探测到积雪，199代表仅Aqua卫星探测到积雪，200代表Terra与Aqua卫星均探测到积雪，238代表Terra卫星探测到积雪的冰碛覆盖冰，239代表Aqua卫星探测到积雪的冰碛覆盖冰，240代表裸露冰碛覆盖冰，242代表Terra与Aqua卫星均探测到积雪的冰碛覆盖冰，248代表Terra卫星探测到积雪的无冰碛冰，249代表Aqua卫星探测到积雪的无冰碛冰，250代表裸露无冰碛冰，252代表Terra与Aqua卫星均探测到积雪的无冰碛冰。

搜集汇总

背景与挑战

背景概述

该数据集包含2002年至2022年间高亚洲地区的改进版MODIS 8天无云雪盖和Randolph Glacier Inventory 6.0产品，具有500米空间分辨率和8天时间分辨率。数据通过合并MODIS Terra和Aqua的8天雪盖产品以及Randolph Glacier Inventory (RGI6.0)生成，覆盖了高亚洲地区（纬度24.32 − 49.19 N，经度58.22 − 122.48 E），并以GeoTIFF文件格式提供。