Transient snow line altitudes of glaciers in the European Alps from multi-mission remote sensing data (2000-2025)

This dataset contains SNOW LINE ALTITUDES (SLA) of glaciers in the European Alps with an area of more than 1 km². SLAs were measured from optical remote sensing data acquired between 2000-01-01 and 2025-12-31 in Google Earth Engine (https://github.com/cr-sommer/snowy-glaciers). Surface classification is based on automated image- and glacier-specific thresholding of infrared brightness histograms. Three different datasets are provided: Glacier-specific SLA time series of glaciers in the European Alps End-of-Summer (EoS) SLAs derived from SLA time series and multi-annual change trends Spatial masks (polygon and line features) of 1. and 2. All SLA observations are based on glacier outlines of the Randolph Glacier Inventory Version 7.0 (https://www.glims.org/RGI/). Glacier IDs refer to the rgi_id attribute of the RGI7.0. Further details on dataset properties are included in the README file.本数据集收录欧洲阿尔卑斯山区面积大于1平方千米的冰川的雪线高度（Snow Line Altitudes, SLA）。相关雪线高度数据源自2000年1月1日至2025年12月31日期间获取的光学遥感影像，处理依托谷歌地球引擎（Google Earth Engine）完成，配套代码仓库详见https://github.com/cr-sommer/snowy-glaciers。地表分类基于针对红外亮度直方图的自动化图像分割与冰川专属阈值设定方法。 本次共提供三类不同数据集： 1. 欧洲阿尔卑斯山区冰川专属雪线高度时间序列 2. 由雪线高度时间序列与多年变化趋势推导得到的夏末（End-of-Summer, EoS）雪线高度 3. 上述两类数据集对应的空间掩码（包含多边形与线状矢量要素） 所有雪线高度观测均基于Randolph冰川目录7.0版（Randolph Glacier Inventory Version 7.0, RGI7.0）的冰川轮廓数据，冰川ID对应RGI7.0数据集中的rgi_id属性。有关数据集属性的更多详细信息，请参见附带的README文件。