Analysis of meteorological data and the surface energy balance of McCall Glacier
ABSTRACT. We report on analysis of meteorological data for the period 27 May–20 August 2004, from two automatic weather stations on McCall Glacier, Alaska, USA, aimed at studying the relationship between climate and ablation. One station is located on a mountain ridge and the other in the ablation a...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.665.5854 2023-05-15T16:20:35+02:00 Analysis of meteorological data and the surface energy balance of McCall Glacier E. J. Klok M. Nolan M. R. Van Den Broeke The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.665.5854 http://www.drmattnolan.org/mccall/mccall_klok_energybalance.pdf?origin%3Dpublication_detail en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.665.5854 http://www.drmattnolan.org/mccall/mccall_klok_energybalance.pdf?origin%3Dpublication_detail Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.drmattnolan.org/mccall/mccall_klok_energybalance.pdf?origin%3Dpublication_detail text ftciteseerx 2016-01-08T17:04:48Z ABSTRACT. We report on analysis of meteorological data for the period 27 May–20 August 2004, from two automatic weather stations on McCall Glacier, Alaska, USA, aimed at studying the relationship between climate and ablation. One station is located on a mountain ridge and the other in the ablation area where we also analyzed the energy balance. The weather station on the glacier measured an average temperature of 5.38C (at 2m height above surface) and wind speed of 3.1m s–1 (at 3m height). A sonic height ranger and ablation stakes indicate a specific mass balance of!1.94"0.09mw.e between 15 June and 20 August. The specific mass balance calculated from the surface energy balance,!2.06"0.18mw.e., is in close correspondence to this. The latter is the sum of 0.12mw.e. of snowfall, 0.003mw.e. of deposition and!2.18mw.e. of melt. Net radiation contributes 74 % of the melt energy. Compared to ablation measurements in the early 1970s, summer ablation was large. This increase is explained by a combination of a relatively higher net radiation, a lower albedo and larger turbulent heat fluxes that led to more energy being available for melting. No single meteorological variable can be isolated as being the principal reason for the high ablation, however. The lower ice albedo (0.19) is possibly due to ash deposits from forest fires. Text glacier Alaska Unknown McCall ENVELOPE(-66.619,-66.619,-67.029,-67.029) |
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Unknown |
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ftciteseerx |
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English |
description |
ABSTRACT. We report on analysis of meteorological data for the period 27 May–20 August 2004, from two automatic weather stations on McCall Glacier, Alaska, USA, aimed at studying the relationship between climate and ablation. One station is located on a mountain ridge and the other in the ablation area where we also analyzed the energy balance. The weather station on the glacier measured an average temperature of 5.38C (at 2m height above surface) and wind speed of 3.1m s–1 (at 3m height). A sonic height ranger and ablation stakes indicate a specific mass balance of!1.94"0.09mw.e between 15 June and 20 August. The specific mass balance calculated from the surface energy balance,!2.06"0.18mw.e., is in close correspondence to this. The latter is the sum of 0.12mw.e. of snowfall, 0.003mw.e. of deposition and!2.18mw.e. of melt. Net radiation contributes 74 % of the melt energy. Compared to ablation measurements in the early 1970s, summer ablation was large. This increase is explained by a combination of a relatively higher net radiation, a lower albedo and larger turbulent heat fluxes that led to more energy being available for melting. No single meteorological variable can be isolated as being the principal reason for the high ablation, however. The lower ice albedo (0.19) is possibly due to ash deposits from forest fires. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
E. J. Klok M. Nolan M. R. Van Den Broeke |
spellingShingle |
E. J. Klok M. Nolan M. R. Van Den Broeke Analysis of meteorological data and the surface energy balance of McCall Glacier |
author_facet |
E. J. Klok M. Nolan M. R. Van Den Broeke |
author_sort |
E. J. Klok |
title |
Analysis of meteorological data and the surface energy balance of McCall Glacier |
title_short |
Analysis of meteorological data and the surface energy balance of McCall Glacier |
title_full |
Analysis of meteorological data and the surface energy balance of McCall Glacier |
title_fullStr |
Analysis of meteorological data and the surface energy balance of McCall Glacier |
title_full_unstemmed |
Analysis of meteorological data and the surface energy balance of McCall Glacier |
title_sort |
analysis of meteorological data and the surface energy balance of mccall glacier |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.665.5854 http://www.drmattnolan.org/mccall/mccall_klok_energybalance.pdf?origin%3Dpublication_detail |
long_lat |
ENVELOPE(-66.619,-66.619,-67.029,-67.029) |
geographic |
McCall |
geographic_facet |
McCall |
genre |
glacier Alaska |
genre_facet |
glacier Alaska |
op_source |
http://www.drmattnolan.org/mccall/mccall_klok_energybalance.pdf?origin%3Dpublication_detail |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.665.5854 http://www.drmattnolan.org/mccall/mccall_klok_energybalance.pdf?origin%3Dpublication_detail |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766008506346897408 |