Near-surface climate and surface energy budget of Larsen C ice shelf, Antarctic Peninsula
Data collected by two automatic weather stations (AWS) on the Larsen C ice shelf, Antarctica, between 22 January 2009 and 1 February 2011 are analyzed and used as input for a model that computes the surface energy budget (SEB), which includes melt energy. The two AWSs are separated by about 70 km in...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , |
Format: | Other/Unknown Material |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-6-353-2012 https://tc.copernicus.org/articles/6/353/2012/ |
id |
ftcopernicus:oai:publications.copernicus.org:tc12828 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:tc12828 2023-05-15T13:36:36+02:00 Near-surface climate and surface energy budget of Larsen C ice shelf, Antarctic Peninsula Kuipers Munneke, P. Broeke, M. R. King, J. C. Gray, T. Reijmer, C. H. 2018-09-27 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/tc-6-353-2012 https://tc.copernicus.org/articles/6/353/2012/ eng eng info:eu-repo/grantAgreement/EC/FP7/226375 doi:10.5194/tc-6-353-2012 https://tc.copernicus.org/articles/6/353/2012/ info:eu-repo/semantics/openAccess eISSN: 1994-0424 info:eu-repo/semantics/Text 2018 ftcopernicus https://doi.org/10.5194/tc-6-353-2012 2020-07-20T16:25:52Z Data collected by two automatic weather stations (AWS) on the Larsen C ice shelf, Antarctica, between 22 January 2009 and 1 February 2011 are analyzed and used as input for a model that computes the surface energy budget (SEB), which includes melt energy. The two AWSs are separated by about 70 km in the north–south direction, and both the near-surface meteorology and the SEB show similarities, although small differences in all components (most notably the melt flux) can be seen. The impact of subsurface absorption of shortwave radiation on melt and snow temperature is significant, and discussed. In winter, longwave cooling of the surface is entirely compensated by a downward turbulent transport of sensible heat. In summer, the positive net radiative flux is compensated by melt, and quite frequently by upward turbulent diffusion of heat and moisture, leading to sublimation and weak convection over the ice shelf. The month of November 2010 is highlighted, when strong westerly flow over the Antarctic Peninsula led to a dry and warm föhn wind over the ice shelf, resulting in warm and sunny conditions. Under these conditions the increase in shortwave and sensible heat fluxes is larger than the decrease of net longwave and latent heat fluxes, providing energy for significant melt. Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Copernicus Publications: E-Journals Antarctic Antarctic Peninsula The Antarctic The Cryosphere 6 2 353 363 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Data collected by two automatic weather stations (AWS) on the Larsen C ice shelf, Antarctica, between 22 January 2009 and 1 February 2011 are analyzed and used as input for a model that computes the surface energy budget (SEB), which includes melt energy. The two AWSs are separated by about 70 km in the north–south direction, and both the near-surface meteorology and the SEB show similarities, although small differences in all components (most notably the melt flux) can be seen. The impact of subsurface absorption of shortwave radiation on melt and snow temperature is significant, and discussed. In winter, longwave cooling of the surface is entirely compensated by a downward turbulent transport of sensible heat. In summer, the positive net radiative flux is compensated by melt, and quite frequently by upward turbulent diffusion of heat and moisture, leading to sublimation and weak convection over the ice shelf. The month of November 2010 is highlighted, when strong westerly flow over the Antarctic Peninsula led to a dry and warm föhn wind over the ice shelf, resulting in warm and sunny conditions. Under these conditions the increase in shortwave and sensible heat fluxes is larger than the decrease of net longwave and latent heat fluxes, providing energy for significant melt. |
format |
Other/Unknown Material |
author |
Kuipers Munneke, P. Broeke, M. R. King, J. C. Gray, T. Reijmer, C. H. |
spellingShingle |
Kuipers Munneke, P. Broeke, M. R. King, J. C. Gray, T. Reijmer, C. H. Near-surface climate and surface energy budget of Larsen C ice shelf, Antarctic Peninsula |
author_facet |
Kuipers Munneke, P. Broeke, M. R. King, J. C. Gray, T. Reijmer, C. H. |
author_sort |
Kuipers Munneke, P. |
title |
Near-surface climate and surface energy budget of Larsen C ice shelf, Antarctic Peninsula |
title_short |
Near-surface climate and surface energy budget of Larsen C ice shelf, Antarctic Peninsula |
title_full |
Near-surface climate and surface energy budget of Larsen C ice shelf, Antarctic Peninsula |
title_fullStr |
Near-surface climate and surface energy budget of Larsen C ice shelf, Antarctic Peninsula |
title_full_unstemmed |
Near-surface climate and surface energy budget of Larsen C ice shelf, Antarctic Peninsula |
title_sort |
near-surface climate and surface energy budget of larsen c ice shelf, antarctic peninsula |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-6-353-2012 https://tc.copernicus.org/articles/6/353/2012/ |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf |
op_source |
eISSN: 1994-0424 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/226375 doi:10.5194/tc-6-353-2012 https://tc.copernicus.org/articles/6/353/2012/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-6-353-2012 |
container_title |
The Cryosphere |
container_volume |
6 |
container_issue |
2 |
container_start_page |
353 |
op_container_end_page |
363 |
_version_ |
1766081216175407104 |