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Direct exploitation of seabirds for food, feathers, eggs or guano are not the only ways in which humans still exert considerable pressure on seabird populations. The destruction and alteration of habitats, the introduction of exotic animals and diseases…
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Measurements of the microwave backscatter coefficient in the ku-band have been obtained over the Antarctic snow cover by the NSCAT wind scatterometer instrument on the ADEOS satellite from August 1996 to June 1997. The instrument has six antennas arranged with two directed forwards…
Measurements of the microwave backscatter from the Antarctic ice sheet have been obtained by the single-sided, right-looking, C-band wind scatterometer carried by the ERS-1 and 2 satellites and by the dual-sided, ku-band NSCAT instrument on ADEOS.
Microwave backscatter from the Antarctic snow cover depends on the surface roughness, properties and structure within the snow cover, and moisture content. Small increases in moisture content produce a significant reduction in backscatter.
The 500 km wide swath of the right-looking ERS wind scatterometer and the orbital geometry allows measurement of the microwave backscatter of all the Antarctic region north of latitude 79°S.