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A Novel Integrated Method to Describe Dust and Fine Supraglacial Debris and Their Effects on Ice Albedo: the Case Study of Forni Glacier, Italian Alps : Volume 8, Issue 3 (13/06/2014)

By Azzoni, R. S.

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Book Id: WPLBN0004023044
Format Type: PDF Article :
File Size: Pages 36
Reproduction Date: 2015

Title: A Novel Integrated Method to Describe Dust and Fine Supraglacial Debris and Their Effects on Ice Albedo: the Case Study of Forni Glacier, Italian Alps : Volume 8, Issue 3 (13/06/2014)  
Author: Azzoni, R. S.
Volume: Vol. 8, Issue 3
Language: English
Subject: Science, Cryosphere, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Zerboni, A., Maugeri, M., Senese, A., Azzoni, R. S., Smiraglia, C., & Diolaiuti, G. A. (2014). A Novel Integrated Method to Describe Dust and Fine Supraglacial Debris and Their Effects on Ice Albedo: the Case Study of Forni Glacier, Italian Alps : Volume 8, Issue 3 (13/06/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: Università degli Studi di Milano, Dipartimento di Scienze della Terra A. Desio, Milan, Italy. We investigated the characteristics of sparse and fine debris coverage at the glacier melting surface and its relation to ice albedo. In spite of the abundant literature dealing with dust and black carbon deposition on glacier accumulation areas (i.e.: on snow and firn), few studies that describe the distribution and properties of fine and discontinuous debris and black carbon at the melting surface of glaciers are available. Furthermore, guidelines are needed to standardize field samplings and lab analyses thus permitting comparisons among different glaciers. We developed a protocol to (i) sample fine and sparse supraglacial debris and dust, (ii) quantify their surface coverage and the covering rate, (iii) describe composition and sedimentological properties, (iv) measure ice albedo and (v) identify the relationship between ice albedo and fine debris coverage. The procedure was tested on the Forni Glacier surface (northern Italy), in summer 2011, 2012 and 2013, when the fine debris and dust presence had marked variability in space and time (along the glacier tongue and from the beginning to the end of summer) thus influencing ice albedo: in particular the natural logarithm of albedo was found to depend on the percentage of glacier surface covered by debris. Debris and dust analyses indicate generally a local origin (from nesting rockwalls) and the organic content was locally high. Nevertheless the finding of some cenospheres suggests an anthropic contribution to the superficial dust as well. Moreover, the effect of liquid precipitation on ice albedo was not negligible, but short lasting (from 1 to 4 day long), thus indicating that also other processes affect ice albedo and ice melt rates and then some attention has to be spent analysing frequency and duration of summer rainfalls for better describing albedo and melt variability.

Summary
A novel integrated method to describe dust and fine supraglacial debris and their effects on ice albedo: the case study of Forni Glacier, Italian Alps

Excerpt
Aoki, T., Aoki, T., Fukabori, M., Tachibana, Y., Zaizen, Y., Nishio, F., and Oishi, T.: Spectral albedo observation on the snow field at Barrow, Alaska, Polar Meteor. Glaciol., 12, 1–9, 1998.; Brock, B. W.: An analysis of short-term albedo variations at Haut Glacier d'Arolla, Switzerland, Geogr. Ann. A, 86, 53–65, 2004.; Aoki, T., Motoyoshi, H., Kodama, Y., Yasunari, T. J., Sugiura, K., and Kobayashi, H.: Atmospheric aerosol deposition on snow surfaces and its effect on albedo, Sola, 2, 13–16, 2006.; Arnold, N. S., Willis, I. C., Sharp, M. J., Richards, K. S., and Lawson, W. J.: A distributed surface energy-balance model for a small valley glacier. Development and testing for Haut Glacier d'Arolla,Valais, Switzerland, J. Glaciol., 42, 77–89, 1996.; Bolch, T.: Debris, in: Encyclopedia of Snow, Ice and Glaciers, edited by: Singh, V., Singh, P., and Haritashya, U., Springer Publications, Utrecht, the Netherlands, 186–188, 2011.; Brock, B. W., Willis, I. C., and Sharp, M. J.: Measurement and parameterization of albedo variations at Haut Glacier d'Arolla, Switzerland, J. Glaciol., 46, 675–688, 2000.; Citterio, M., Diolaiuti, G., Smiraglia, C., Verza, G., and Meraldi, E.: Initial results from the automatic weather station (AWS) on the ablation tongue of Forni Glacier (Upper Valtellina, Italy), Geogr. Fis. Din. Quat., 30, 141–151, 2007.; Conway, J., Gades, A., and Raymond, C. F.: Albedo of dirty snow during conditions of melt, Water Resour. Res., 32, 1713–1718, 1996.; D'Agata, C., Bocchiola, D., Maragno, D., Smiraglia, C., and Diolaiuti, G.: Glacier shrinkage driven by climate change during half a century (1954–2007) in the Ortles-Cevedale Group (Stelvio National Park, Lombardy, Italian Alps), Theor. Appl. Climatol., 116, 169–190, doi:10.1007/s00704-013-0938-5, 2013.; Deline, P.: Change in surface debris cover on Mont Blanc massif glaciers after the Little Ice Age termination, The Holocene 15, 302–309, 2005.; Diolaiuti, G. and Smiraglia, C.: Changing glaciers in a changing climate: how vanishing geomorphosites have been driving deep changes in mountain landscapes and environments, Geomorphologie, 2, 131–152, 2010.; Diolaiuti, G., Smiraglia, C., Verza, G. P., Chillemi, R., and Meraldi, E.: La rete micrometeorologica glaciale lombarda: un contributo alla conoscenza dei ghiacciai alpini e delle loro variazioni recenti, in: Clima e Ghiacciai, la Crisi delle Risorse Glaciali in Lombardia, Regione Lombardia, edited by: Smiraglia, C., Morandi, G., Diolaiuti, G., Regione Lombardia, Milan, 69–92, available at: http://users.unimi.it/glaciol (last access: 5 June 2014), 2009.; Diolaiuti, G., Bocchiola, D., D'Agata, C., and Smiraglia, C.: Evidence of climate change impact upon glaciers recession within the Italian Alps: the case of Lombardy glaciers, Theor. Appl. Climatol., 109, 429–445, doi:10.1007/s00704-012-0589-y, 2012.; Flanner, M. G., Zender, C. S., Hess, P. G., Mahowald, N. M., Painter, T. H., Ramanathan, V., and Rasch, P. J.: Springtime warming and reduced snow cover from carbonaceous particles, Atmos. Chem. Phys., 9, 2481–2497, doi:10.5194/acp-9-2481-2009, 2009.; Fujita, K.: Effect of dust event timing on glacier runoff: sensitivity analysis for a Tibetan glacier, Hydrol. Process., 21, 2892–2896, 2007.; Gale, S. J. and Hoare, P. G.: Quaternary Sediments, Belhaven Press, New York, 1991.; Garavaglia, V., Pelfini, M., Diolaiuti, G., Pasquale, V., and Smiraglia, C.: Evaluating tourist perception of environmental changes as a contribution to managing natural resources in glacierized areas. A case study of the Forni Glacier (Stelvio National Park, Italian Alps), Environ. Manage., 50, 1125–1138, doi:10.1007/s00267-012-9948-9

 

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