Spatial heterogeneity of albedo over a snow-covered agricultural landscape

Kenneth E. Kunkel, Scott A. Isard, Steven E. Hollinger, Byron Gleason, Mark Belding

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Measurements of albedo were obtained along a 100 km transect in east central Illinois using a combination of airborne and ground-based radiometers. Analysis of the measurements focused on three different land use categories: agricultural cropland, prairie grass, and woodland. The value of albedo over the woodland after a fresh snowfall was 0.30, which is somewhat higher than what has been measured in a previous experiment over an aspen forest but similar to previous measurements over a deciduous forest in the eastern United States. The albedo values over the grassland were similar to past experiments and similar to the values over cropland. The drifting that accompanied one of the snow events caused large differences in albedo during snowmelt compared to another event with minimal drifting but similar average snow depth. The albedo was lower over the melting wind-blown snow cover than for a snow cover of similar average depth that fell under light wind conditions. These large differences suggest that inclusion of meteorological conditions during snowfall in snow parameterizations may appreciably increase their accuracy. Different tillage practices used in the agricultural fields also caused measurable differences in albedo during the snowmelt phase.

Original languageEnglish (US)
Article number1999JD900050
Pages (from-to)19551-19557
Number of pages7
JournalJournal of Geophysical Research Atmospheres
Volume104
Issue numberD16
DOIs
StatePublished - Aug 27 1999

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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