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Sensitivity of Greenland Ice Sheet Surface Mass Balance to Surface Albedo Parameterization: a Study with a Regional Climate Model : Volume 6, Issue 2 (24/04/2012)

By Van Angelen, J. H.

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Book Id: WPLBN0004022662
Format Type: PDF Article :
File Size: Pages 32
Reproduction Date: 2015

Title: Sensitivity of Greenland Ice Sheet Surface Mass Balance to Surface Albedo Parameterization: a Study with a Regional Climate Model : Volume 6, Issue 2 (24/04/2012)  
Author: Van Angelen, J. H.
Volume: Vol. 6, Issue 2
Language: English
Subject: Science, Cryosphere, Discussions
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Van Angelen, J. H., Fettweis, X., Meijgaard, E. V., Lhermitte, S., Munneke, P. K., M. Lenaert, J. T., & Van Den Broeke, M. R. (2012). Sensitivity of Greenland Ice Sheet Surface Mass Balance to Surface Albedo Parameterization: a Study with a Regional Climate Model : Volume 6, Issue 2 (24/04/2012). Retrieved from http://www.ebooklibrary.org/


Description
Description: Institute for Marine and Atmospheric Research Utrecht, Utrecht University, The Netherlands. We present a sensitivity study of the surface mass balance (SMB) of the Greenland Ice Sheet, as modeled using a regional atmospheric climate model, to various parameter settings in the albedo parameterization. The snow albedo parameterization uses grain size as a prognostic variable and further depends on cloud cover, solar zenith angle and black carbon concentration. For the control experiment the overestimation of absorbed shortwave radiation (+6 %) at the K-transect (West Greenland) for the period 2004–2009 is considerably reduced compared to the previous density-dependent albedo parameterization (+22 %). To simulate realistic snow albedo values, a small concentration of black carbon is needed. A background ice albedo field derived from MODIS imagery improves the agreement between the modeled and observed SMB gradient along the K-transect. The effect of enhanced retention and refreezing is a decrease of the albedo due to an increase in snow grain size. As a secondary effect of refreezing the snowpack is heated, enhancing melt and further lowering the albedo. Especially in a warmer climate this process is important, since it reduces the refreezing potential of the firn layer covering the Greenland Ice Sheet.

Summary
Sensitivity of Greenland Ice Sheet surface mass balance to surface albedo parameterization: a study with a regional climate model

Excerpt
Abdalati, W. and Steffen, K.: Snowmelt on the Greenland ice sheet as derived from passive microwave satellite data, J. Climate, 10, 165–175, doi:10.1175/1520-0442(1997)010{\textless0165:SOTGIS{\textgreater}2.0.CO;2}, 1997.; Abdalati, W. and Steffen, K.: Greenland ice sheet melt extent: 1979–1999, J. Geophys. Res., 106, 33983–33988, doi:10.1029/2001JD900181, 2001.; Armstrong, R. and Brodzik, M.: An earth-gridded SSM/I data set for cryospheric studies and global change monitoring, Adv. Space Res., 16, 155–163, doi:10.1016/0273-1177(95)00397-W, 1995.; Boggild, C., Brandt, R., Brown, K., and Warren, S.: The ablation zone in northeast Greenland: ice types, albedos and impurities, J. Glaciol., 56, 101–113, doi:10.3189/002214310791190776, 2010.; Bougamont, M. and Bamber, J. L.: A surface mass balance model for the Greenland Ice Sheet, J. Geophys. Res., 110, F04018, doi:10.1029/2005JF000348, 2005.; Bougamont, M., Bamber, J. L., Ridley, J. K., Gladston, R. M., Greuell, W., Hanna, E., Payne, A. J., and Rutt, I.: Impact of model physics on estimating the surface mass balance of the Greenland ice sheet, Geophys. Res. Lett., 34, L17501, doi:10.1029/2007GL030700, 2007.; Box, J. E., Fettweis, X., Stroeve, J. C., Tedesco, M., Hall, D. K., and Steffen, K.: Greenland ice sheet albedo feedback: thermodynamics and atmospheric drivers, The Cryosphere Discuss., 6, 593–634, doi:10.5194/tcd-6-593-2012, 2012.; Brun, E., Martin, E., Simon, V., and Gendre, C.: An energy and mass model of snow cover suitable for operational avalanche forecasting, J. Glaciol., 35, 333–342, 1989.; Col{é}ou, C. and Lesaffre, B.: Irreducible water saturation in snow: experimental results in a cold laboratory, Ann. Glaciol., 26, 64–68, 1998.; Ettema, J., {V}an den Broeke, M. R., {V}an Meijgaard, E., {V}an de Berg, W. J., Bamber, J. L., Box, J. E., and Bales, R. C.: Higher surface mass balance of the Greenland ice sheet revealed by high-resolution climate modeling, Geophys. Res. Lett., 36, L12501, doi:10.1029/2009GL038110, 2009.; Ettema, J., van den Broeke, M. R., van Meijgaard, E., van de Berg, W. J., Box, J. E., and Steffen, K.: Climate of the Greenland ice sheet using a high-resolution climate model – Part 1: Evaluation, The Cryosphere, 4, 511–527, doi:10.5194/tc-4-511-2010, 2010{a}.; Ettema, J., van den Broeke, M. R., van Meijgaard, E., and van de Berg, W. J.: Climate of the Greenland ice sheet using a high-resolution climate model – Part 2: Near-surface climate and energy balance, The Cryosphere, 4, 529–544, doi:10.5194/tc-4-529-2010, 2010{b}.; Fettweis, X., Tedesco, M., van den Broeke, M., and Ettema, J.: Melting trends over the Greenland ice sheet (1958–2009) from spaceborne microwave data and regional climate models, The Cryosphere, 5, 359–375, doi:10.5194/tc-5-359-2011, 2011.; Fitzgerald, P. W., Bamber, J. L., Ridley, J. K., and Rougier, J. C.: Exploration of para

 

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