Numerical simulation of extreme snowmelt observed at the SIGMA-A site, northwest Greenland, during summer 2012
The surface energy balance (SEB) from 30 June to 14 July 2012 at site SIGMA (Snow Impurity and Glacial Microbe effects on abrupt warming in the Arctic)-A, (78°03' N, 67°38' W; 1490 m a.s.l.) on the northwest Greenland Ice Sheet (GrIS) was investigated by using in situ atmospheric and snow...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:52cacc33a1b04ddeb46bfb8baa720887 2023-05-15T13:11:08+02:00 Numerical simulation of extreme snowmelt observed at the SIGMA-A site, northwest Greenland, during summer 2012 M. Niwano T. Aoki S. Matoba S. Yamaguchi T. Tanikawa K. Kuchiki H. Motoyama 2015-05-01 https://doi.org/10.5194/tc-9-971-2015 http://www.the-cryosphere.net/9/971/2015/tc-9-971-2015.pdf https://doaj.org/article/52cacc33a1b04ddeb46bfb8baa720887 en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-9-971-2015 http://www.the-cryosphere.net/9/971/2015/tc-9-971-2015.pdf https://doaj.org/article/52cacc33a1b04ddeb46bfb8baa720887 undefined The Cryosphere, Vol 9, Iss 3, Pp 971-988 (2015) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2015 fttriple https://doi.org/10.5194/tc-9-971-2015 2023-01-22T17:53:03Z The surface energy balance (SEB) from 30 June to 14 July 2012 at site SIGMA (Snow Impurity and Glacial Microbe effects on abrupt warming in the Arctic)-A, (78°03' N, 67°38' W; 1490 m a.s.l.) on the northwest Greenland Ice Sheet (GrIS) was investigated by using in situ atmospheric and snow measurements as well as numerical modeling with a one-dimensional multi-layered physical snowpack model called SMAP (Snow Metamorphism and Albedo Process). At SIGMA-A, remarkable near-surface snowmelt and continuous heavy rainfall (accumulated precipitation between 10 and 14 July was estimated to be 100 mm) were observed after 10 July 2012. Application of the SMAP model to the GrIS snowpack was evaluated based on the snow temperature profile, snow surface temperature, surface snow grain size, and shortwave albedo, all of which the model simulated reasonably well. Above all, the fact that the SMAP model successfully reproduced frequently observed rapid increases in snow albedo under cloudy conditions highlights the advantage of the physically based snow albedo model (PBSAM) incorporated in the SMAP model. Using such data and model, we estimated the SEB at SIGMA-A from 30 June to 14 July 2012. Radiation-related fluxes were obtained from in situ measurements, whereas other fluxes were calculated with the SMAP model. By examining the components of the SEB, we determined that low-level clouds accompanied by a significant temperature increase played an important role in the melt event observed at SIGMA-A. These conditions induced a remarkable surface heating via cloud radiative forcing in the polar region. Article in Journal/Newspaper albedo Arctic Greenland Ice Sheet The Cryosphere Unknown Arctic Greenland The Cryosphere 9 3 971 988 |
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language |
English |
topic |
geo envir |
spellingShingle |
geo envir M. Niwano T. Aoki S. Matoba S. Yamaguchi T. Tanikawa K. Kuchiki H. Motoyama Numerical simulation of extreme snowmelt observed at the SIGMA-A site, northwest Greenland, during summer 2012 |
topic_facet |
geo envir |
description |
The surface energy balance (SEB) from 30 June to 14 July 2012 at site SIGMA (Snow Impurity and Glacial Microbe effects on abrupt warming in the Arctic)-A, (78°03' N, 67°38' W; 1490 m a.s.l.) on the northwest Greenland Ice Sheet (GrIS) was investigated by using in situ atmospheric and snow measurements as well as numerical modeling with a one-dimensional multi-layered physical snowpack model called SMAP (Snow Metamorphism and Albedo Process). At SIGMA-A, remarkable near-surface snowmelt and continuous heavy rainfall (accumulated precipitation between 10 and 14 July was estimated to be 100 mm) were observed after 10 July 2012. Application of the SMAP model to the GrIS snowpack was evaluated based on the snow temperature profile, snow surface temperature, surface snow grain size, and shortwave albedo, all of which the model simulated reasonably well. Above all, the fact that the SMAP model successfully reproduced frequently observed rapid increases in snow albedo under cloudy conditions highlights the advantage of the physically based snow albedo model (PBSAM) incorporated in the SMAP model. Using such data and model, we estimated the SEB at SIGMA-A from 30 June to 14 July 2012. Radiation-related fluxes were obtained from in situ measurements, whereas other fluxes were calculated with the SMAP model. By examining the components of the SEB, we determined that low-level clouds accompanied by a significant temperature increase played an important role in the melt event observed at SIGMA-A. These conditions induced a remarkable surface heating via cloud radiative forcing in the polar region. |
format |
Article in Journal/Newspaper |
author |
M. Niwano T. Aoki S. Matoba S. Yamaguchi T. Tanikawa K. Kuchiki H. Motoyama |
author_facet |
M. Niwano T. Aoki S. Matoba S. Yamaguchi T. Tanikawa K. Kuchiki H. Motoyama |
author_sort |
M. Niwano |
title |
Numerical simulation of extreme snowmelt observed at the SIGMA-A site, northwest Greenland, during summer 2012 |
title_short |
Numerical simulation of extreme snowmelt observed at the SIGMA-A site, northwest Greenland, during summer 2012 |
title_full |
Numerical simulation of extreme snowmelt observed at the SIGMA-A site, northwest Greenland, during summer 2012 |
title_fullStr |
Numerical simulation of extreme snowmelt observed at the SIGMA-A site, northwest Greenland, during summer 2012 |
title_full_unstemmed |
Numerical simulation of extreme snowmelt observed at the SIGMA-A site, northwest Greenland, during summer 2012 |
title_sort |
numerical simulation of extreme snowmelt observed at the sigma-a site, northwest greenland, during summer 2012 |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-971-2015 http://www.the-cryosphere.net/9/971/2015/tc-9-971-2015.pdf https://doaj.org/article/52cacc33a1b04ddeb46bfb8baa720887 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
albedo Arctic Greenland Ice Sheet The Cryosphere |
genre_facet |
albedo Arctic Greenland Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 9, Iss 3, Pp 971-988 (2015) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-9-971-2015 http://www.the-cryosphere.net/9/971/2015/tc-9-971-2015.pdf https://doaj.org/article/52cacc33a1b04ddeb46bfb8baa720887 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-9-971-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
3 |
container_start_page |
971 |
op_container_end_page |
988 |
_version_ |
1766246074640498688 |