Journal cover Journal topic
The Cryosphere An interactive open-access journal of the European Geosciences Union
doi:10.5194/tcd-9-1345-2015
© Author(s) 2015. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
26 Feb 2015
Review status
This discussion paper has been under review for the journal The Cryosphere (TC). The revised manuscript was not accepted.
Albedo reduction caused by black carbon and dust accumulation: a quantitive model applied to the western margin of the Greenland ice sheet
T. Goelles1,2 and C. E. Bøggild3 1The University Centre in Svalbard (UNIS), Longyearbyen, Norway
2Norwegian University of Life Sciences (NMBU), Aas, Norway
3Arctic Technology Centre, Technical University of Denmark, Kgs. Lyngby, Denmark
Abstract. Ice loss due to surface melt of the Greenland ice sheet has increased in recent years. Surface melt in the ablation zone is controlled by atmospheric temperature and surface albedo. Impurities such as mineral dust and black carbon darken the snow and ice surfaces and therefore reduce the surface albedo which leads to more absorbed solar energy and ultimately amplifying melt. These impurities accumulate on the ice surface both from atmospheric fallout and by melt-out of material which was enclosed in the snowpack or the ice compound. A general impurity accumulation model is developed and applied to calculate the surface albedo evolution at two locations in western Greenland. The model is forced either by regional climate model output or by a parameterisation for temperature and precipitation. Simulations identify mineral dust as the main contributor to impurity mass on ice where the dominating part originates from melt out of englacial dust. Daily reduction of impurities is in the range of one per-mille which leads to a residence time of decades on the ice surface. Therefore the impurities have a prolonged effect on surface melt once they are located on the ice surface. The currently englacially stored mineral dust and black carbon will effect future melt and sea level rise and can be studied with the presented model.

Citation: Goelles, T. and Bøggild, C. E.: Albedo reduction caused by black carbon and dust accumulation: a quantitive model applied to the western margin of the Greenland ice sheet, The Cryosphere Discuss., 9, 1345-1381, doi:10.5194/tcd-9-1345-2015, 2015.
T. Goelles and C. E. Bøggild
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC C493: 'Review', Anonymous Referee #1, 20 Apr 2015 Printer-friendly Version 
AC C795: 'Reply to reviewer 1', Thomas Goelles, 14 May 2015 Printer-friendly Version Supplement 
 
RC C1249: 'Review', Anonymous Referee #2, 20 Jul 2015 Printer-friendly Version 
AC C2937: 'Reply to Referee 2', Thomas Goelles, 02 Feb 2016 Printer-friendly Version Supplement 
T. Goelles and C. E. Bøggild
T. Goelles and C. E. Bøggild

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