Glacier Lake Outline Jostedalsbreen 2016-2021

Abstract

Glacier Lake Outlines (GLO) for 51 lakes around Jostedalsbreen Ice Cap, Norway were mapped from 2016-2021 in each melting season (July-November) with a frequency of 1 image per month. Lakes from surrounding glaciers were also included for the analysis. The lakes included in this product are either directly connected to the glacier outline or are at close proximity to the glacier. A semi-automatic classification method using the Normalized Difference Water Index (NDWI) was used for mapping the lakes outlines.

Imageries from Sentinel 2 were used primarily for calculating NDWI and mapping the lake outlines to create seasonal and annual timeseries data of areal lake extent, but the gaps in the data series were filled up, as much as possible, by using imageries from PlanetScope to optimize the number of useable images in the timeseries. The dataset, data processing and uncertainties are described by Pariyar (2022) in his Master's Thesis "Monitoring glacial lakes and outburst floods around Jostedalsbreen ice cap".