@article{e444eeda14b54740b24a2d30c8c18d56,
title = "Surface accumulation in Northern Central Greenland during the last 300 years",
abstract = "The internal stratigraphy of snow and ice as imaged by ground-penetrating radar may serve as a source of information on past accumulation. This study presents results from two ground-based radar surveys conducted in Greenland in 2007 and 2015, respectively. The first survey was conducted during the traverse from the ice-core station NGRIP (North Greenland Ice Core Project) to the ice-core station NEEM (North Greenland Eemian Ice Drilling). The second survey was carried out during the traverse from NEEM to the ice-core station EGRIP (East Greenland Ice Core Project) and then onwards to Summit Station. The total length of the radar profiles is 1427 km. From the radar data, we retrieve the large-scale spatial variation of the accumulation rates in the interior of the ice sheet. The accumulation rates range from 0.11 to 0.26 m a-1 ice equivalent with the lowest values found in the northeastern sector towards EGRIP. We find no evidence of temporal or spatial changes in accumulation rates when comparing the 150-year average accumulation rates with the 321-year average accumulation rates. Comparisons with regional climate models reveal that the models underestimate accumulation rates by up to 35% in northeastern Greenland. Our results serve as a robust baseline to detect present changes in either surface accumulation rates or patterns.",
keywords = "Accumulation, Ground-penetrating radar, Ice-sheet mass balance, Radio-echo sounding",
author = "Karlsson, {Nanna B.} and Sebastian Razik and Maria H{\"o}rhold and Anna Winter and Daniel Steinhage and Tobias Binder and Olaf Eisen",
note = "Funding Information: We acknowledge the help and support from the NGRIP, NEEM and EGRIP projects. EGRIP is directed and organized by the Centre of Ice and Climate at the Niels Bohr Institute, Copenhagen. It is supported by funding agencies and institutions in Denmark (A. P. M ller Foundation, University of Copenhagen), USA (US National Science Foundation, Office of Polar Programs), Germany (Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research), Japan (National Institute of Polar Research and Artic Challenge for Sustainability), Norway (University of Bergen and Bergen Research Foundation), Switzerland (Swiss National Science Foundation), France (French Polar Institute Paul-Emile Victor, Institute for Geosciences and Environmental research) and China (Chinese Academy of Sciences and Beijing Normal University). We thank both traverse teams, in particular P. Sperlich who participated in the collection of the 2007 data. We thank Emerson E&P Software, Emerson Automation Solutions, for providing licenses in the scope of the Emerson Academic Program. We also thank X. Fettweiss for making the MAR data files available to us. We are grateful for the comments and suggestions for improvements from two anonymous reviewers and the editor, M. Koutnik. Funding Information: We acknowledge the help and support from the NGRIP, NEEM and EGRIP projects. EGRIP is directed and organized by the Centre of Ice and Climate at the Niels Bohr Institute, Copenhagen. It is supported by funding agencies and institutions in Denmark (A. P. M{\"o}ller Foundation, University of Copenhagen), USA (US National Science Foundation, Office of Polar Programs), Germany (Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research), Japan (National Institute of Polar Research and Artic Challenge for Sustainability), Norway (University of Bergen and Bergen Research Foundation), Switzerland (Swiss National Science Foundation), France (French Polar Institute Paul-Emile Victor, Institute for Geosciences and Environmental research) and China (Chinese Academy of Sciences and Beijing Normal University). We thank both traverse teams, in particular P. Sperlich who participated in the collection of the 2007 data. We thank Emerson E&P Software, Emerson Automation Solutions, for providing licenses in the scope of the Emerson Academic Program. We also thank X. Fettweiss for making the MAR data files available to us. We are grateful for the comments and suggestions for improvements from two anonymous reviewers and the editor, M. Koutnik. Publisher Copyright: Copyright {\textcopyright} The Author(s) 2020. Published by Cambridge University Press.",
year = "2020",
month = apr,
day = "1",
doi = "10.1017/aog.2020.30",
language = "English",
volume = "61",
pages = "214--224",
journal = "Annals of Glaciology",
issn = "0260-3055",
publisher = "Cambridge University Press",
number = "81",
}
