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Microwave signatures of first-year and multiyear sea ice. (1973)

Campbell, W. J. ; Nordberg, W. ; Gloersen, P. ; [et al.]

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Publication Date: 2011-08-16

Description: A combination of remote sensing from an aircraft and simultaneous surface measurements have confirmed the feasibility of identifying old and new sea ice according to its emission of thermal radiation at wavelengths between 0.3 and 3 cm. Emissivity of first-year thick ice with a surface temperature of about 260 K is 0.95 or greater for wavelengths between 0.81 and 11 cm; the emissivity of multiyear ice is 0.8 at 0.81 cm and 0.95 at 11 cm, increasing monotonically in this wavelength interval. The ease with which multiyear ice can be distinguished from first-year ice using a passive microwave radiometer is demonstrated by comparing mosaics prepared both from photographs and images of 1.55-cm radiation.

Keywords: GEOPHYSICS

Type: Journal of Geophysical Research; 78; June 20

Format: text

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