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KMID : 1024520150240010133
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Journal of the Environmental Sciences
2015 Volume.24 No. 1 p.133 ~ p.150
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Quality Evaluation of Wind Vectors from UHF Wind Profiler using Radiosonde Measurements
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Kim Kwang-Ho
Kim Min-Seong
Seo Seong-Woon
Kim Park-Sa
Kang Dong-Hwan
Kwon Byung-Hyuk
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Abstract
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Wind profiler provides vertical profiles of three-dimensional wind vectors with high spatiotemporal resolution. The wind vectors is useful to analyze severe weather phenomena and to validate the various products from numerical weather prediction model. However, the wind measurements are not immune to ground clutter, bird, insect, and aircraft. Therefore, quality of wind vectors from wind profiler must be quantitatively evaluated prior to its application. In this study, wind vectors from UHF wind profiler at Ganwon Regional Meteorological Administration was quantitatively evaluated using 27 radiosonde measurements that were launched every two or three hours according to rainfall intensity during Intensive Observation Period (IOP) from June to July 2013. In comparison between two measurements, wind vectors from wind profiler was relatively underestimated. In addition, the accuracy and quality of wind vectors from wind profiler decrease with increasing beam height. The accuracy and quality of the wind vectors for rainy periods during IOP were higher than for the clear-air measurements. The moderate rainfall intensity lead to multi-peaks in Doppler spectrum. It results in overestimation of vertical air motion, whereas wind vectors from wind profilers shows good agreement with those from radiosonde measurements for light rainfall intensity.
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KEYWORD
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UHF windprofiler, Radiosonde, Quality control, Ground clutter, Doppler spectrum
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