@article{6c7ab6f3c531414aa175b2c797a9d36d,
title = "Widespread seasonal speed-up of west Antarctic Peninsula glaciers from 2014 to 2021",
abstract = "Mass loss from the Antarctic Ice Sheet is dominated by ice dynamics, where ocean-driven melt leads to un-buttressing and ice flow acceleration. Long-term ice speed change has been measured in Antarctica over the past four decades; however, there are limited observations of short-term seasonal speed variability on the grounded ice sheet. Here we assess seasonal variations in ice flow speed on 105 glaciers on the west Antarctic Peninsula using Sentinel-1 satellite observations spanning 2014 to 2021. We find an average summer speed-up of 12.4 ± 4.2%, with maximum speed change of up to 22.3 ± 3.2% on glaciers with the most pronounced seasonality. Our results show that over the six-year study period, glaciers on the west Antarctic Peninsula respond to seasonal forcing in the ice–ocean–atmosphere system, indicating sensitivity to changes in terminus position, surface melt plus rainwater flux, and ocean temperature. Seasonal speed variations must be accounted for when measuring the mass balance and sea level contribution of the Antarctic Peninsula, and studies must establish the future evolution of this previously undocumented signal under climate warming scenarios.",
keywords = "Surface mass-balance, B ice shelf, Amundsen sea embayment, Climate-change, Larsen, Sheet, Flow, Retreat, Melt, Disintegration",
author = "Wallis, {Benjamin J.} and Hogg, {Anna E.} and {van Wessem}, {J. Melchior} and Davison, {Benjamin J.} and {van den Broeke}, {Michiel R.}",
note = "Funding Information: This work was led by the School of Earth and Environment at the University of Leeds. Data processing was undertaken on ARC3, part of the high-performance computing facilities at the University of Leeds, UK. The authors gratefully acknowledge the European Space Agency and the European Commission for the acquisition and availability of Sentinel-1 data and the use of datasets produced through the Copernicus Marine Service. We also acknowledge the Polar Geospatial Center at the University of Minnesota for the availability of the REMA DEM and J. Lea of the University of Liverpool for the public availability of the GEEDiT and MaQiT digitization tools. B.J.W. is supported by the Panorama Natural Environment Research Council (NERC) Doctoral Training Partnership (DTP), under grant NE/S007458/1. A.E.H. and B.J.D. are supported by the NERC DeCAdeS project (NE/T012757/1) and ESA Polar+ Ice Shelves project (ESA-IPL-POE-EF-cb-LE-2019-834). M.R.v.d.B. was supported by the Netherlands Earth System Science Centre (NESSC). J.M.v.W. was supported by the Netherlands Organisation for Scientific Research (NWO) VENI grant VI.Veni.192.083. Funding Information: This work was led by the School of Earth and Environment at the University of Leeds. Data processing was undertaken on ARC3, part of the high-performance computing facilities at the University of Leeds, UK. The authors gratefully acknowledge the European Space Agency and the European Commission for the acquisition and availability of Sentinel-1 data and the use of datasets produced through the Copernicus Marine Service. We also acknowledge the Polar Geospatial Center at the University of Minnesota for the availability of the REMA DEM and J. Lea of the University of Liverpool for the public availability of the GEEDiT and MaQiT digitization tools. B.J.W. is supported by the Panorama Natural Environment Research Council (NERC) Doctoral Training Partnership (DTP), under grant NE/S007458/1. A.E.H. and B.J.D. are supported by the NERC DeCAdeS project (NE/T012757/1) and ESA Polar+ Ice Shelves project (ESA-IPL-POE-EF-cb-LE-2019-834). M.R.v.d.B. was supported by the Netherlands Earth System Science Centre (NESSC). J.M.v.W. was supported by the Netherlands Organisation for Scientific Research (NWO) VENI grant VI.Veni.192.083. Publisher Copyright: {\textcopyright} 2023, The Author(s), under exclusive licence to Springer Nature Limited.",
year = "2023",
month = mar,
doi = "10.1038/s41561-023-01131-4",
language = "English",
volume = "16",
pages = "231--237",
journal = "Nature Geoscience",
issn = "1752-0894",
publisher = "Nature Publishing Group",
number = "3",
}