Increasing meltwater discharge from the Nuuk region of the Greenland ice sheet and implications for mass balance (1960-2012)
We assess the runoff and surface mass balance (SMB) of the Greenland ice sheet in the Nuuk region (southwest) using output of two regional climate models (RCMs) evaluated by observations. The region encompasses six glaciers that drain into Godtha˚bsfjord. RCM data (1960–2012) are resampled to a high...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/296266 2023-07-23T04:19:23+02:00 Increasing meltwater discharge from the Nuuk region of the Greenland ice sheet and implications for mass balance (1960-2012) van As, D. Andersen, M.L. Petersen, D. Fettweis, X. van Angelen, J.H. Lenaerts, J.T.M. van den Broeke, M.R. Lea, J.M. Boeggild, C.E. Ahlstroem, A.P. Steffen, K. Marine and Atmospheric Research Afd Marine and Atmospheric Research Sub Physical Oceanography Sub Dynamics Meteorology 2014 text/plain https://dspace.library.uu.nl/handle/1874/296266 en eng 0022-1430 https://dspace.library.uu.nl/handle/1874/296266 info:eu-repo/semantics/EmbargoedAccess Article 2014 ftunivutrecht 2023-07-02T00:59:14Z We assess the runoff and surface mass balance (SMB) of the Greenland ice sheet in the Nuuk region (southwest) using output of two regional climate models (RCMs) evaluated by observations. The region encompasses six glaciers that drain into Godtha˚bsfjord. RCM data (1960–2012) are resampled to a high spatial resolution to include the narrow (relative to the native grid spacing) glacier trunks in the ice mask. Comparing RCM gridded results with automatic weather station (AWS) point measurements reveals that locally models can underestimate ablation and overestimate accumulation by up to tens of per cent. However, comparison with lake discharge indicates that modelled regional runoff totals are more accurate. Model results show that melt and runoff in the Nuuk region have doubled over the past two decades. Regional SMB attained negative values in recent high-melt years. Taking into account frontal ablation of the marine-terminating glaciers, the region lost 10–20km3w.e. a–1 in 2010–12. If 2010 melting prevails during the remainder of this century, a low-end estimate of sea-level rise of 5mm is expected by 2100 from this relatively small section (2.6%) of the ice sheet alone. Article in Journal/Newspaper glacier Greenland Ice Sheet Nuuk Utrecht University Repository Greenland Nuuk ENVELOPE(-52.150,-52.150,68.717,68.717) |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
description |
We assess the runoff and surface mass balance (SMB) of the Greenland ice sheet in the Nuuk region (southwest) using output of two regional climate models (RCMs) evaluated by observations. The region encompasses six glaciers that drain into Godtha˚bsfjord. RCM data (1960–2012) are resampled to a high spatial resolution to include the narrow (relative to the native grid spacing) glacier trunks in the ice mask. Comparing RCM gridded results with automatic weather station (AWS) point measurements reveals that locally models can underestimate ablation and overestimate accumulation by up to tens of per cent. However, comparison with lake discharge indicates that modelled regional runoff totals are more accurate. Model results show that melt and runoff in the Nuuk region have doubled over the past two decades. Regional SMB attained negative values in recent high-melt years. Taking into account frontal ablation of the marine-terminating glaciers, the region lost 10–20km3w.e. a–1 in 2010–12. If 2010 melting prevails during the remainder of this century, a low-end estimate of sea-level rise of 5mm is expected by 2100 from this relatively small section (2.6%) of the ice sheet alone. |
author2 |
Marine and Atmospheric Research Afd Marine and Atmospheric Research Sub Physical Oceanography Sub Dynamics Meteorology |
format |
Article in Journal/Newspaper |
author |
van As, D. Andersen, M.L. Petersen, D. Fettweis, X. van Angelen, J.H. Lenaerts, J.T.M. van den Broeke, M.R. Lea, J.M. Boeggild, C.E. Ahlstroem, A.P. Steffen, K. |
spellingShingle |
van As, D. Andersen, M.L. Petersen, D. Fettweis, X. van Angelen, J.H. Lenaerts, J.T.M. van den Broeke, M.R. Lea, J.M. Boeggild, C.E. Ahlstroem, A.P. Steffen, K. Increasing meltwater discharge from the Nuuk region of the Greenland ice sheet and implications for mass balance (1960-2012) |
author_facet |
van As, D. Andersen, M.L. Petersen, D. Fettweis, X. van Angelen, J.H. Lenaerts, J.T.M. van den Broeke, M.R. Lea, J.M. Boeggild, C.E. Ahlstroem, A.P. Steffen, K. |
author_sort |
van As, D. |
title |
Increasing meltwater discharge from the Nuuk region of the Greenland ice sheet and implications for mass balance (1960-2012) |
title_short |
Increasing meltwater discharge from the Nuuk region of the Greenland ice sheet and implications for mass balance (1960-2012) |
title_full |
Increasing meltwater discharge from the Nuuk region of the Greenland ice sheet and implications for mass balance (1960-2012) |
title_fullStr |
Increasing meltwater discharge from the Nuuk region of the Greenland ice sheet and implications for mass balance (1960-2012) |
title_full_unstemmed |
Increasing meltwater discharge from the Nuuk region of the Greenland ice sheet and implications for mass balance (1960-2012) |
title_sort |
increasing meltwater discharge from the nuuk region of the greenland ice sheet and implications for mass balance (1960-2012) |
publishDate |
2014 |
url |
https://dspace.library.uu.nl/handle/1874/296266 |
long_lat |
ENVELOPE(-52.150,-52.150,68.717,68.717) |
geographic |
Greenland Nuuk |
geographic_facet |
Greenland Nuuk |
genre |
glacier Greenland Ice Sheet Nuuk |
genre_facet |
glacier Greenland Ice Sheet Nuuk |
op_relation |
0022-1430 https://dspace.library.uu.nl/handle/1874/296266 |
op_rights |
info:eu-repo/semantics/EmbargoedAccess |
_version_ |
1772182381222952960 |