11 Snow and Ice
251
Fig. 11.3. Example of an operational snow water equivalent distribution map sent out to water
resources agencies in Canada by facsimile transmission
that user feedback has served to enhance the validation and the refinement of the
SSM/I SWE algorithm (Goodison and Walker, 1995). One enhancement has been the
development ofa wet snow indicator (Walker and Goodison, 1993), which overcomes
a major limitation of the passive microwave technique described in Sect. 11.2.3 by