Spatial lake dynamics and lake-ice datasets of the Northern Seward and Baldwin Peninsulas in Alaska

The data publication contains supplementary data to the article "Supplementary Dataset to: The catastrophic thermokarst lake drainage events of 2018 in northwestern Alaska: Fast-forward into the future"

This data publication includes four datasets:

1. Lake change datasets for 1999-2014 and 2017-2018 based on Landsat and Sentinel-1 data as Polygon Shapefiles

2. Lake change datasets for 2017 and 2018 based on high-temporal resolution PlanetScope imagery as Polygon Shapefiles and csv.

3. Lake ice simulations for the study area for 1980-2018.

4. Study sites in two versions: a) including seawater and b) clipped to land area. Files are Polygon Shapefiles.

The datasets cover the land area of the Baldwin Peninsula and northern Seward Peninsula in north-western Alaska.

The datasets are (#1&#2) remote sensing based observations and (#3) modelled data. Methods are described in detail in the original manuscript (open access). Dataset #4 is the extent of the study site in two versions, a) full extent including seawater and b) land only including lakes. The land boundary was clipped with the “Global Self-consistent, Hierarchical, High-resolution Geography Database” (GSHHG; Wessel and Smith, 1996) dataset in scale “h”.

The datasets cover different temporal periods and have a different temporal resolution.
Data were collected to measure the extent of a rapid and widespread thermokarst lake drainage event in northwestern Alaska in 2018 and to compare the affected number of lakes and area to previous periods. Lake-ice model data were calculated to simulate lake-ice conditions since 1980 and to put the lake-ice and weather conditions in 2017/2018 into context.

本数据出版物为论文《补充数据集：2018年阿拉斯加西北部灾难性热喀斯特湖（thermokarst lake）溃决事件：展望未来》的配套补充数据。

本数据出版物包含四类数据集：
1. 基于陆地卫星（Landsat）与哨兵-1号（Sentinel-1）影像生成的1999-2014年及2017-2018年湖泊变化数据集，格式为多边形形状文件（Polygon Shapefiles）。
2. 基于高时间分辨率行星影像（PlanetScope）生成的2017年与2018年湖泊变化数据集，格式包含多边形形状文件（Polygon Shapefiles）与逗号分隔值文件（csv）。
3. 研究区域1980-2018年的湖冰模拟数据集。
4. 两种版本的研究样区：a) 包含海水范围的完整样区；b) 裁剪至陆地区域的样区，文件格式均为多边形形状文件（Polygon Shapefiles）。

本数据集覆盖阿拉斯加西北部的鲍德温半岛（Baldwin Peninsula）与苏厄德半岛（Seward Peninsula）北部陆地区域。

本数据集包含两类数据：(#1与#2) 基于遥感的观测数据，以及(#3) 模拟数据。研究方法详见开放获取的原文稿件。数据集#4为两种版本的研究样区范围：a) 包含海水的完整范围；b) 仅包含陆地与湖泊的范围。陆地区域边界通过"全球自洽分层高分辨率地理数据库（Global Self-consistent, Hierarchical, High-resolution Geography Database, GSHHG; Wessel和Smith, 1996）"的"h"级比例尺数据裁剪得到。

本数据集覆盖不同时间周期，且时间分辨率各异。

本次数据采集旨在测算2018年阿拉斯加西北部快速且大范围发生的热喀斯特湖溃决事件的影响范围，并对比该事件影响的湖泊数量与面积与历史同期数据。湖冰模拟数据用于模拟1980年以来的湖冰状态，以明确2017/2018年湖冰与气象条件的背景情况。