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), including melt energy. The two AWSs are separated by about 70 km in the...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/231414 2023-07-23T04:13:48+02:00 Near-surface climate and surface energy budget of Larsen C ice shelf, Antarctic Peninsula Kuipers Munneke, P. van den Broeke, Michiel King, J.C. Gray, T. Reijmer, C.H. Marine and Atmospheric Research Sub Dynamics Meteorology Dep Natuurkunde 2011 text/plain https://dspace.library.uu.nl/handle/1874/231414 en eng 1994-0432 https://dspace.library.uu.nl/handle/1874/231414 info:eu-repo/semantics/OpenAccess Article 2011 ftunivutrecht 2023-07-02T00:05:37Z 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), including 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 reduction of net longwave and latent heat fluxes, providing energy for significant melt. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Utrecht University Repository Antarctic Antarctic Peninsula The Antarctic |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
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), including 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 reduction of net longwave and latent heat fluxes, providing energy for significant melt. |
author2 |
Marine and Atmospheric Research Sub Dynamics Meteorology Dep Natuurkunde |
format |
Article in Journal/Newspaper |
author |
Kuipers Munneke, P. van den Broeke, Michiel King, J.C. Gray, T. Reijmer, C.H. |
spellingShingle |
Kuipers Munneke, P. van den Broeke, Michiel 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. van den Broeke, Michiel 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 |
2011 |
url |
https://dspace.library.uu.nl/handle/1874/231414 |
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_relation |
1994-0432 https://dspace.library.uu.nl/handle/1874/231414 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772181567782780928 |