P1.11
An analysis of vertical and horizontal winds inside precipitation gauge shielding
PAPER WITHDRAWN
Scott D. Landolt, NCAR, Boulder, CO; and R. M. Rasmussen
It is well documented that unshielded precipitation gauges located above ground collect lesser amounts of precipitation, particularly snow, than gauges at ground level due primarily to wind effects. To minimize these wind effects, various wind shields have been designed to help increase the collection efficiency of the precipitation gauges. Since many airport operations, particularly ground de-icing, rely on accurate measurements of precipitation, it is important to understand the effects these shields have on both the horizontal and vertical wind speeds. Three-dimensional sonic anemometers were placed in the center of Alter and Double Fenced Intercomparison Reference (DFIR) shields. A comparison of the horizontal and vertical wind patterns during precipitation and non-precipitation events among shields is presented here. Additionally, precipitation rates were also calculated from gauges in shields that are identical shields to those being studied, and direct comparisons of the rates to the horizontal and vertical winds are also presented.
Poster Session 1, IIPS Poster Session I
Monday, 12 January 2009, 2:30 PM-4:00 PM, Hall 5
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