Radiometric investigation of different snow covers in Svalbard |
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Authors: | Ruggero Casacchia Francesca Lauta Rosamaria Salvatori Anselmo Cagnati Mauro Valt Jon B Ørbæk |
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Institution: | R. Casacchia, F. Lauta &R. Salvatori, National Research Council, Institute of Atomospheric Pollution, Via Salaria km 29.300 C.P. 10, 00016 Monterotondo Stazione (Roma), Italy;A. Cagnati &M. Valt, ARPAV CVA, Strada Passo Campolongo 122, 32020 Arabba di Livinallongo (BL), Italy;J. B. Ørbæk, Norwegian polar Institute, Polar Environmental Centre, N-9296 Tromsø, Norway. |
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Abstract: | This paper examines the relationship between reflectance and physical characteristics of the snow cover in the Arctic. Field data were acquired for different snow and ice surfaces during a survey carried out at Ny-Ålesund, Svalbard, in spring 1998. In each measurement reflectance in the spectral range 350 - 2500 nm, snow data (including temperature, grain size and shape, density and water content), surface layer morphology, and vertical profile of the snow pack were recorded detailed analysis of reflectance based on the physical was performed. Field reflectance data were also re-sampled at the spectral intervals of Landsat TM to compare the ability of identifying different snow targets at discrete wavelength intervals. This analysis shows that reliable data on snow structure and thickness are necessary to understand albedo changes of the snow surfaces. |
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