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Meteorology and surface energy fluxes in the 2005–2007 ablation seasons at the Miage debris-covered glacier, Mont Blanc Massif, Italian Alps

By Benjamin Brock, Claudia Mihalcea, Martin Kirkbride, Guglielmina Diolaiuti, Mark Cutler and Claudio Smiraglia

Abstract

During the 2005–2007 June–September ablation seasons, meteorological conditions were recorded on the lower and upper parts of the debris‐covered ablation zone of Miage Glacier, Italy. In 2005, debris temperature and subdebris ice melt were also monitored at 25 points with debris thickness of 0.04–0.55 m, spread over 5 km2 of the glacier. The radiative fluxes were directly measured, and near‐closure of the surface energy balance is achieved, providing support for the bulk aerodynamic calculation of the turbulent fluxes. Surface‐layer meteorology and energy fluxes are dominated by the pattern of incoming solar radiation which heats the debris, driving strong convection.\ud Mean measured subdebris ice melt rates are 6–33 mm d−1, and mean debris thermal conductivity is 0.96 W m−1 K−1, displaying a weak positive relationship with debris thickness. Mean seasonal values of the net shortwave, net longwave, and debris heat fluxes show little variation between years, despite contrasting meteorological conditions, while the turbulent latent (evaporative) heat flux was more than twice as large in the wet summer of 2007 compared with 2005. The increase in energy output from the debris surface in response to increasing surface temperature means that subdebris ice melt rates are fairly insensitive to atmospheric temperature variations in contrast to debris‐free glaciers. Improved knowledge of spatial patterns of debris thickness distribution and 2 m air temperature, and the controls on evaporation of rainwater from the surface, are needed for distributed physically based melt modeling of debris‐covered glaciers

Topics: F800
Publisher: American Geophysical Union
Year: 2010
OAI identifier: oai:nrl.northumbria.ac.uk:6294

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Citations

  1. (2001). A physically based method for correcting temperature data measured by naturally ventilated sensors over snow, doi
  2. (2004). Ablation and associated energy balance of a horizontal glacier surface on doi
  3. (2000). Air temperature environment on the debris‐ covered area of Lirung Glacier, Langtang Valley, Nepal Himalayas,
  4. (2005). An enhanced temperature‐index glacier melt model including the shortwave radiation balance: Development and testing for Haut Glacier d’Arolla, doi
  5. (1997). Application of a conceptual precipitation–runoff model (HYCYMODEL) in a debris‐ covered glacierized basin in the Langtang Valley,
  6. (2005). Atmospheric controls on the heat balance of Zongo Glacier (16°S, doi
  7. (1988). Basic Exploration Geophysics, doi
  8. (2006). Calculating ice melt beneath a debris layer using meteorological data, doi
  9. (2005). Change in surface debris cover on Mont Blanc massif glaciers after the “Little Ice Age” termination, doi
  10. (2000). Characteristics of ablation and heat balance in debris‐free and debris‐covered areas on Khumbu Glacier, Nepal Himalayas, in the pre‐monsoon season,
  11. (2003). Climate change in mountain regions: A review of possible impacts, doi
  12. (2010). Debris‐covered glaciers, in Encyclopedia of Snow, Ice and Glaciers, edited by doi
  13. (2002). Distribution characteristics and energy balance of ice cliffs on debris‐covered glaciers, doi
  14. (2000). Dust influence on the melting process of glacier ice: Experimental results from Lirung Glacier, Nepal Himalayas,
  15. (2006). Effect of climate change on runoff of a glacierized Himalayan basin, doi
  16. (1997). Elevational changes in meteorological variables along a midlatitude glacier during summer, doi
  17. (1989). Energy exchange and ablation rates on the debris‐covered Rakhiot Glacier,
  18. (1982). Estimate of glacier ablation under a debris layer from surface temperature and meteorological variables,
  19. (2002). Estimation of snow ablation under a dust layer covering a wide range of albedo, doi
  20. (1982). Evaporation Into the Atmosphere: Theory, doi
  21. (1981). Field experiments to determine the effect of a debris layer on ablation of glacier ice, doi
  22. (2005). Glacier melt: A review of processes and their modeling, doi
  23. (2006). Glaciological characteristics of the ablation zone of Baltoro Glacier, doi
  24. (2003). Glaciological response to distal tephra fallout from the 1947 eruption of Hekla, doi
  25. (2003). Hydrological controls on patterns of surface, internal and basal motion during three “spring events”: Haut Glacier d’Arolla, doi
  26. (1989). Hydrological investigations at Biafo Glacier, Karakoram Himalaya: An important source of water for the Indus River,
  27. (2006). Ice ablation and meteorological conditions on the debris covered area of Baltoro Glacier doi
  28. (1959). Ice melting under a thin layer of moraine and the existence of ice cores in moraine ridges,
  29. (2002). Influence of sub‐debris thawing on ablation and runoff of the Djankuat Glacier in the Caucasus,
  30. (2009). Interactions between rock avalanches and glaciers in the Mont Blanc massif during the late Holocene, doi
  31. (2006). Measurement and parameterisation of surface roughness variations at Haut Glacier d’Arolla, doi
  32. (2004). Modelling land‐ice surface mass balance, in Mass Balance of the Cryosphere: Observations and Modelling of Contemporary and Future Changes, doi
  33. (2007). Mountains of the world, water towers for humanity: Typology, mapping, and global significance, doi
  34. (1983). On the use of bulk aerodynamic formulae over melting snow,
  35. (2004). One‐year measurements of surface heat budget on the ablation zone of Antizana Glacier 15, Ecuadorian Andes, doi
  36. (2008). Planimetric and volumetric glacier changes in the Khumbu Himal, Nepal, since 1962 using Corona, Landsat TM and ASTER data, doi
  37. (2000). Practical prediction of ice melting beneath various thickness of debris cover on Khumbu Glacier, Nepal, using a positive degree‐day factor,
  38. (1990). Rapid calculation of terrain parameters for radiation modeling from digital elevation data, doi
  39. (2009). Recent (1975–2003) changes in the Miage debris‐covered glacier tongue (Mont Blanc, Italy) from analysis of aerial photos and maps,
  40. (2007). Recent glacier retreat in the Caucasus Mountains, Russia, and associated increase in supraglacial debris cover and supra‐/proglacial doi
  41. Smiraglia (2008a), Using ASTER satellite and ground‐based surface temperature measurements to derive supraglacial debris cover and thickness patterns on doi
  42. (2004). Spatial and temporal variability of meteorological variables at Haut Glacier d’Arolla (Switzerland) during the ablation season 2001: Measurements and simulations, doi
  43. (2008). Sub‐debris melt rates on southern Inylchek Glacier, central Tian Shan, doi
  44. (2000). Summer temperature profiles within supraglacial debris on Khumbu Glacier, Nepal,
  45. (2008). Surface energy balance and melt thresholds over 11 years at Taylor Glacier, doi
  46. (2005). Surface mass‐balance observations and automatic weather station data along a transect near Kangerlussuaq, west Greenland, doi
  47. (1989). Surface roughness and bulk heat transfer on a glacier: Comparison with eddy correlation,
  48. Tartari (2008b), Spatial distribution of debris thickness and melting from remote‐sensing and meteorological data, at debris‐covered Baltoro Glacier, doi
  49. (2008). Temperature and precipitation climate at the equilibrium‐line altitude of glaciers expressed by the degree‐day factor for melting snow, doi
  50. (1996). The parameterization of shortwave and longwave radiation fluxes for use in zonally averaged climate models, doi
  51. (2008). The supraglacial debris‐system at the Pasterze Glacier, Austria: Spatial distribution, characteristics and transport of debris, doi
  52. (2007). The surface energy balance of an active ice‐covered volcano: Volcán Villarrica, doi
  53. (2000). The use of bulk and profile methods for determining surface heat fluxes in the presence of glacier winds, doi
  54. (2006). Uncertainty estimates in regional and global observed temperature changes: A new dataset from 1850, doi
  55. (2002). Ventilated and unventilated air temperature measurements for glacier‐climate studies on a tropical high mountain site, doi

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