Modeling cloud properties over the 79 N Glacier (Nioghalvfjerdsfjorden, NE Greenland) for an intense summer melt period in 2019
Abstract Long believed to be insignificant, melt activity on the Northeast Greenland Ice Stream (NEGIS) has increased in recent years. Summertime Arctic clouds have the potential to strongly affect surface melt processes by regulating the amount of radiation received at the surface. However, the clo...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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crwiley:10.1002/qj.4374 2024-09-15T17:35:53+00:00 Modeling cloud properties over the 79 N Glacier (Nioghalvfjerdsfjorden, NE Greenland) for an intense summer melt period in 2019 Andernach, Malena Turton, Jenny V. Mölg, Thomas Bundesministerium für Bildung und Forschung 2022 http://dx.doi.org/10.1002/qj.4374 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4374 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.4374 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4374 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Quarterly Journal of the Royal Meteorological Society volume 148, issue 749, page 3566-3590 ISSN 0035-9009 1477-870X journal-article 2022 crwiley https://doi.org/10.1002/qj.4374 2024-07-30T04:21:21Z Abstract Long believed to be insignificant, melt activity on the Northeast Greenland Ice Stream (NEGIS) has increased in recent years. Summertime Arctic clouds have the potential to strongly affect surface melt processes by regulating the amount of radiation received at the surface. However, the cloud effect over Greenland is spatially and temporally variable and high‐resolution information on the northeast is absent. This study aims at exploring the potential of a high‐resolution configuration of the polar‐optimized Weather Research & Forecasting Model (PWRF) in simulating cloud properties in the area of the Nioghalvfjerdsfjorden Glacier (79 N Glacier). Subsequently, the model simulations are employed to investigate the impact of Arctic clouds on the surface energy budget and on surface melting during the extensive melt event at the end of July 2019. Compared to automatic weather station (AWS) measurements and remote‐sensing data (Sentinel‐2A and the Moderate Resolution Imaging Spectroradiometer, MODIS), PWRF simulates cloud properties with sufficient accuracy. It appears that peak melt was caused by an increase in solar radiation and sensible heat flux (SHF) in response to a blocking anticyclone and foehn winds in the absence of clouds. Cloud warming over high‐albedo surfaces helped to precondition the surface and prolonged the melting as the anticyclone abated. The results are sensitive to the surface albedo and suggest spatiotemporal differences in the cloud effect as snow and ice properties change over the course of the melting season. This demonstrates the importance of including high‐resolution information on clouds in analyses of ice sheet dynamics. Article in Journal/Newspaper albedo glacier Greenland Ice Sheet Nioghalvfjerdsfjorden Wiley Online Library Quarterly Journal of the Royal Meteorological Society 148 749 3566 3590 |
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Open Polar |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Long believed to be insignificant, melt activity on the Northeast Greenland Ice Stream (NEGIS) has increased in recent years. Summertime Arctic clouds have the potential to strongly affect surface melt processes by regulating the amount of radiation received at the surface. However, the cloud effect over Greenland is spatially and temporally variable and high‐resolution information on the northeast is absent. This study aims at exploring the potential of a high‐resolution configuration of the polar‐optimized Weather Research & Forecasting Model (PWRF) in simulating cloud properties in the area of the Nioghalvfjerdsfjorden Glacier (79 N Glacier). Subsequently, the model simulations are employed to investigate the impact of Arctic clouds on the surface energy budget and on surface melting during the extensive melt event at the end of July 2019. Compared to automatic weather station (AWS) measurements and remote‐sensing data (Sentinel‐2A and the Moderate Resolution Imaging Spectroradiometer, MODIS), PWRF simulates cloud properties with sufficient accuracy. It appears that peak melt was caused by an increase in solar radiation and sensible heat flux (SHF) in response to a blocking anticyclone and foehn winds in the absence of clouds. Cloud warming over high‐albedo surfaces helped to precondition the surface and prolonged the melting as the anticyclone abated. The results are sensitive to the surface albedo and suggest spatiotemporal differences in the cloud effect as snow and ice properties change over the course of the melting season. This demonstrates the importance of including high‐resolution information on clouds in analyses of ice sheet dynamics. |
author2 |
Bundesministerium für Bildung und Forschung |
format |
Article in Journal/Newspaper |
author |
Andernach, Malena Turton, Jenny V. Mölg, Thomas |
spellingShingle |
Andernach, Malena Turton, Jenny V. Mölg, Thomas Modeling cloud properties over the 79 N Glacier (Nioghalvfjerdsfjorden, NE Greenland) for an intense summer melt period in 2019 |
author_facet |
Andernach, Malena Turton, Jenny V. Mölg, Thomas |
author_sort |
Andernach, Malena |
title |
Modeling cloud properties over the 79 N Glacier (Nioghalvfjerdsfjorden, NE Greenland) for an intense summer melt period in 2019 |
title_short |
Modeling cloud properties over the 79 N Glacier (Nioghalvfjerdsfjorden, NE Greenland) for an intense summer melt period in 2019 |
title_full |
Modeling cloud properties over the 79 N Glacier (Nioghalvfjerdsfjorden, NE Greenland) for an intense summer melt period in 2019 |
title_fullStr |
Modeling cloud properties over the 79 N Glacier (Nioghalvfjerdsfjorden, NE Greenland) for an intense summer melt period in 2019 |
title_full_unstemmed |
Modeling cloud properties over the 79 N Glacier (Nioghalvfjerdsfjorden, NE Greenland) for an intense summer melt period in 2019 |
title_sort |
modeling cloud properties over the 79 n glacier (nioghalvfjerdsfjorden, ne greenland) for an intense summer melt period in 2019 |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/qj.4374 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4374 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.4374 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.4374 |
genre |
albedo glacier Greenland Ice Sheet Nioghalvfjerdsfjorden |
genre_facet |
albedo glacier Greenland Ice Sheet Nioghalvfjerdsfjorden |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 148, issue 749, page 3566-3590 ISSN 0035-9009 1477-870X |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/qj.4374 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
148 |
container_issue |
749 |
container_start_page |
3566 |
op_container_end_page |
3590 |
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1810484106052501504 |