A dataset of thermokarst lake drainage events in northern Alaska (2000-2020)

The catastrophic thermokarst lake drainage events occurring in the circumpolar Arctic permafrost region are referred to as the new Arctic hazard. To accurately detect this disturbance process, the authors performed a time series analysis of changes in the thermokarst lake region of northern Alaska since 2000 using all available Landsat TM, ETM+, and OLI continuous data on the Google Earth Engine platform. This dataset includes 90 thermokarst lake drainage events detected in northern Alaska during 2000-2020 and year-by-year water distribution maps based on AWEI. The thermokarst lake drainage events are published in Shapefile format, including information on the area, location, drainage proportion, and year of drainage for each drained lake.

发生在环北极多年冻土区的灾难性热融湖塘（thermokarst lake）溃决事件，被称为新型北极灾害。为精准识别该扰动过程，研究团队依托谷歌地球引擎（Google Earth Engine）平台上的全部可用Landsat TM、ETM+及OLI连续观测数据，对2000年以来阿拉斯加北部热融湖塘区域的变化开展了时间序列分析。本数据集涵盖2000-2020年间在阿拉斯加北部探测到的90起热融湖塘溃决事件，以及基于自动水体提取指数（AWEI）生成的逐年水体分布图谱。该热融湖塘溃决事件数据以形状文件（Shapefile）格式发布，包含每处溃决湖塘的面积、位置、溃决比例及溃决年份等信息。

搜集汇总

背景与挑战

背景概述

该数据集记录了2000年至2020年间在阿拉斯加北部检测到的90个热喀斯特湖排水事件，旨在研究北极永久冻土区的新灾害现象。数据集包含Shapefile格式的排水事件信息，如面积、位置和排水年份，以及基于AWEI的逐年水分布图，适用于遥感分析和环境变化研究。