The
approach used here is to infer wet snow from a combination of measurements of
snow temperature of surface (STS) and snow grain size (SGS) in a time series
of observations. The temperature observations give a good indication of where
wet snow potentially may be present, but are in themselves not accurate enough
to provide very strong evidence of wet snow. However, a strong indication of
a wet snow surface is a rapid increase of the effective grain size observed
simultaneously with a snow surface temperature of approximately 0°C.
Snow
surface wetness (SSW) For each pixel, this is a categorical variable of 2
values: dry snow or melting snow
