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Remund & Long 1999
Remund, Q.P. and Long, D.G. (1999). Sea ice extent mapping using Ku band scatterometer data. Journal of Geophysical Research 104: doi: 10.1029/98JC02373. issn: 0148-0227.

Although spaceborne scatterometers such as the NASA scatterometer have inherently low spatial resolution, resolution enhancement techniques can be used to increase the utility of scatterometer data in monitoring sea-ice extent in the polar regions, a key parameter in the global climate. The resolution enhancement algorithm produces images of A and B, where A is the normalized radar backscatter coefficient &sgr;0 at 40¿ incidence and B is the incidence angle dependence of &sgr;0. Dual-polarization A and B parameters are used to identify sea ice and ocean pixels in composite images. The A copolarization ratio and vertically polarized B are used as primary classification parameters to discriminate between sea ice and open ocean. Estimates of the sea-ice extent are obtained using linear and quadratic (Mahalanobis distance) discriminant boundaries. The distribution parameters needed for the quadratic estimate are taken from the linear estimate. The &sgr;0 error variance is used to reduce errors in the linear and Mahalanobis ice/ocean classifications. Noise reduction is performed through binary image region growing and erosion/dilation techniques. The resulting edge closely matches the NASA Team algorithm special sensor microwave imager derived 30% ice concentration edge. A 9-month data set of global sea-ice extent maps is produced with one 6-day average map every 3 days. ¿ 1999 American Geophysical Union

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Abstract

Keywords
Hydrology, Snow and ice, Hydrology, Instruments and techniques, Oceanography, General, Arctic and Antarctic oceanography, Oceanography, General, Instruments and techniques, Marine Geology and Geophysics, Seafloor morphology and bottom photography
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
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