8 Satellite Microwave Radar Observations of Antarctic Sea Ice
181
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Day of Year
Fig. 18. a-d. Time series of a surface air temperatures from the Finnish Salargos buoy; b snow-temperature gradients at thermistor sites on snow-covered perennial ice floes; c 0 or a~yof multiyear
floes (vertical bars indicating range of values), x or aSAR (i.e,. global SAR image means), and. aScatt
or 40· incidence normalized backscatter coefficient; d • EScat backscatter gradient M (linear
regressed) at 40° incidence. For further details, see text (after Drinkwater and Lytle 1997).