Analysis of meteorological data and the surface energy balance of McCall Glacier, Alaska, USA
- 1 January 2005
- journal article
- Published by International Glaciological Society in Journal of Glaciology
- Vol. 51 (174), 451-461
- https://doi.org/10.3189/172756505781829241
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 5.3°C (at 2 m height above surface) and wind speed of 3.1 m s−1 (at 3 m height). A sonic height ranger and ablation stakes indicate a specific mass balance of –1.94 ± 0.09 m w.e between 15 June and 20 August. The specific mass balance calculated from the surface energy balance, –2.06 ± 0.18 m w.e., is in close correspondence to this. The latter is the sum of 0.12 m w.e. of snowfall, 0.003 m w.e. of deposition and –2.18 m w.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.This publication has 24 references indexed in Scilit:
- Assessing and Improving the Quality of Unattended Radiation Observations in AntarcticaJournal of Atmospheric and Oceanic Technology, 2004
- Increase of 10 m ice temperature: climate warming or glacier thinning?Journal of Glaciology, 2002
- 2 m temperatures along melting mid-latitude glaciers, and implications for the sensitivity of the mass balance to variations in temperatureJournal of Glaciology, 1998
- The mass balance of McCall Glacier, Brooks Range, Alaska, U.S.A.; its regional relevance and implications for climate change in the ArcticJournal of Glaciology, 1998
- Some Aspects of Energy Balance and Ablation of Storglaciaren, Northern SwedenGeografiska Annaler: Series A, Physical Geography, 1996
- Surface Roughness and Bulk Heat Transfer on a Glacier: Comparison with Eddy CorrelationJournal of Glaciology, 1989
- Applied Modeling of the Nighttime Surface Energy Balance over LandJournal of Applied Meteorology and Climatology, 1988
- The Combined Heat, Ice and Water Balance of McCall Glacier, Alaska: A Contribution to the International Hydrological DecadeJournal of Glaciology, 1974
- Mass Balance Studies on McCall Glacier Brooks Range, AlaskaArctic and Alpine Research, 1972
- The Mathematical Representation of Wind Speed and Temperature Profiles in the Unstable Atmospheric Surface LayerJournal of Applied Meteorology, 1970