Analysis of SAR Data of the Polar Oceans: Recent Advances - download pdf or read online

By Professor Dr. Costas Tsatsoulis, Dr. Ronald Kwok (auth.)

This ebook studies fresh advances within the use of SAR imagery for operational purposes and for aiding technology investigations of the polar oceans. the $64000 parameters which might be extracted from spaceborne SAR imagery are mentioned. Algorithms utilized in such analyses are defined and information structures utilized in generating the ocean ice items are provided.

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Extra resources for Analysis of SAR Data of the Polar Oceans: Recent Advances

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40 0 '0 g. " ~ ~ 20 l! ,. z:..... r'" > 16 ......... 12. 4'W (copyright ESA). b Segmented image and histogram of measured floes, discarded floes, open water, and substrate. Note that the open water class in the image is white and its associated histogram bar black. c Image of floe size distribution and size histogram 2 Identifying Ice Floes and Computing Ice Floe Distributions in SAR Images 27 ly first-year ice and is placed by segmentation into the water/ice mixture category. While this may seem confusing or incorrect, it should be borne in mind that this ice is most likely to be thinner than the floes and melt away during the summer months, leaving the thicker, older, more rounded floes intact at the end of the summer.

BARBER, A. N. PAPAKYRIAKOU 30 ppt at the ice-ocean interface]. 96 g·cm-3• Liquid brine is interspersed through the ice as intercrystalline brine inclusions and brine drainage channels. The brine inclusions are generally formed in the orientation of growth (vertical) or directed according to the predominant ocean current (Vant et al. 1978). The brine drainage channels are distributed heterogeneously across the ice surface and provide a primary mechanism for brine drainage in the spring (Wakatsuchi and Kawamura 1987).

This period coincides with a reduction in tlIe spatial extent of the melt ponds and cyclical changes in the water in liquid content within the hummocks. The exact mechanisms for scattering over multiyear sea ice in the advanced melt season remain largely unexplored and are identified here as a priority for future research. In first year-sea ice 0'0 increases over the ponding period and decreases as the ice begins to drain, analogous to that described for the multiyear ice surface. The mecha- 3 Role of SAR in Surface Energy Flux Measurements Over Sea Ice 45 nisms for first year ice scattering during the advanced melt period are also largely unknown.

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