WMO schrijft voor:
"In areas where snow can accumulate on the ground, a system to raise or lower the screen is required to maintain a relatively constant height above the snow cover. If no such system is available, then the installation height for the screen must be increased to prevent the screen from becoming buried under a layer of snow. In such circumstances, a height greater than 2 m is acceptable as the temperature gradient for heights of 1.5 m to 5 m is low and generally remains below 1EC."
Bron:
Guide to Meteorological Instruments and Methods of Observation
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