- Northern Hemisphere Weekly and Monthly Snow Cover
Dewey, K. F. and Heim Jr., R., 1982: A Digital Archive of Northern
Hemisphere Snow Cover, November 1966 through December 1980. Bull.
Amer. Meteor. Soc., 63(10), 1132-1141.
Dewey, K.F., and R. Heim, Jr., 1981: Satellite observations of
variations in Northern Hemisphere seasonal snow cover. Technical
Report NESS 87, NOAA, 83 pp..
The U.S. National Earth Satellite Service (NESS) created hand-drawn
Northern Hemisphere maps of snow and ice boundaries on a weekly
basis starting in 1966. A satellite meteorologist would use visible
satellite data to determine the change in snow and ice boundaries
from the previous week, and confirm any drastic changes with surface
station observations. Since these maps were the only complete record
of snow and ice extent, providing spatially-continuous coverage
versus the historical daily point observations taken mainly in
populated areas, they were digitized by the Climatology Program at
the University of Nebraska onto a 190.5 km resolution
polar-stereographic grid, and then objectively analyzed to produce
various other snow cover products.
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