Average monthly freezing-level elevation, 1948-2000.
Climate data from NCEP Reanalysis; topography from GTOPO30; vizualization in OpenDX.

Diaz, Eischeid, Duncan, and Bradley, 2003, Variability of Freezing Levels,
Melting Season Indicators, and Snow Cover for Selected High-elevation and
Continental Regions in the Last 50 Years, Climatic Change, 59, 333-52.

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