Supraglacial lakes and channels in West Antarctica and Antarctic Peninsula during January 2017

• Main Authors: Diarmuid Corr, Amber Leeson, Mal McMillan, Ce Zhang, Thomas Barnes
• Format: Dataset
• Language: English
• Published: 2021
• Subjects: Antarctic; The Antarctic; Antarctic Peninsula; West Antarctica; West Antarctic Ice Sheet; Antarc*; Antarctica; Ice Sheet
• Online Access: https://zenodo.org/record/5642755; https://doi.org/10.5281/zenodo.5642755

The maximum extent of supraglacial lakes and channels in West Antarctica and the Antarctic Peninsula in January 2017 was produced by a Dual-NDWI (Normalised Difference Water Index) approach with thresholds. >2000 individual scenes were captured by Sentinel-2 (S2, filename: TNNXXX_YYYYMMDD) and Landsat-8 (L8, filename: LC08_L1GT_NNNNNN_YYYYMMDD_YYYYMMDD_01_T2) satellite sensors during the entire month of January 2017. To obtain maximum coverage on the cloudy Antarctic Peninsula, the time period is extended to February 10, 2017 over this region. This dataset consists of the maximum extent of supraglacial hydrological activity during January 2017 and detailed 10,478 supraglacial features (10,223 lakes and 255 channels), with cumulative area 119.4 square km in total on the West Antarctic ice sheet and Antarctic Peninsula. In addition to the final product, the supraglacial hydrological features from both sensors (23,389 polygons for S2 and 17,571 polygons for L8) overlapping the final map are included in supplementary datasets. The supraglacial lake and channel polygons are available as digital GIS, Geographic Information System, shapefiles (.shp) and GeoJSON files as well as Google Earth format (.kmz). The code used to produce the lake and channel dataset for each sensor (S2 and L8) is implemented using Python, and can be accessed on Zenodo (https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoi.org%2F10.5281%2Fzenodo.4906097&data=04%7C01%7Ccorrd%40live.lancs.ac.uk%7Ce16045ed14e34f2cb4f108d92b70565e%7C9c9bcd11977a4e9ca9a0bc734090164a%7C0%7C0%7C637588586902880130%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=JPsWDkSk9wqxEcoxMGWzbNgleTFB1NoIFn7t0WlDg3Q%3D&reserved=0) . Landsat-8 and Sentinel-2 imagery are freely available at ...