The Cryosphere, 11, 2393–2409, 2017 https://doi.org/10.5194/tc-11-2393-2017 © Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License. Impact of impurities and cryoconite on the optical properties of the Morteratsch Glacier (Swiss Alps) Biagio Di Mauro1, Giovanni Baccolo2,3, Roberto Garzonio1, Claudia Giardino4, Dario Massabò5,6, Andrea Piazzalunga7, Micol Rossini1, and Roberto Colombo1 1Remote Sensing of Environmental Dynamics Laboratory, Earth and Environmental Sciences Department, University of Milano-Bicocca, 20126 Milan, Italy 2Earth and Environmental Sciences Department, University of Milano-Bicocca, 20126 Milan, Italy 3National Institute of Nuclear Physics (INFN), Section of Milano-Bicocca, Milan, Italy 4Institute for Electromagnetic Sensing of the Environment, National Research Council of Italy, Milan, Italy 5Department of Physics, University of Genoa, Genoa, Italy 6National Institute of Nuclear Physics (INFN), Genoa, Italy 7Water & Life Lab SRL, Entratico (BG), Italy Correspondence to: Biagio Di Mauro (
[email protected]) Received: 11 April 2017 – Discussion started: 4 May 2017 Revised: 20 September 2017 – Accepted: 21 September 2017 – Published: 1 November 2017 Abstract. The amount of reflected energy by snow and ice glacier. The presence of EC and OC in cryoconite samples plays a fundamental role in their melting processes. Differ- suggests a relevant role of carbonaceous and organic material ent non-ice materials (carbonaceous particles, mineral dust in the darkening of the ablation zone. This darkening effect (MD), microorganisms, algae, etc.) can decrease the re- is added to that caused by fine debris from lateral moraines, flectance of snow and ice promoting the melt. The object of which is assumed to represent a large fraction of cryoconite.