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KMID : 1024520120210020145
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Journal of the Environmental Sciences
2012 Volume.21 No. 2 p.145 ~ p.152
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Analysis on Wind Profile Characteristics in a Sublayer of Atmospheric Boundary Layer over a Semi-Complex Terrain - LIDAR Remote Sensing Campaign at Pohang Accelerator Laboratory
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Kim Hyun-Goo
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Abstract
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The mean wind speed and turbulence intensity profiles in the atmospheric boundary layer were extracted from a LIDAR remote sensing campaign in order to apply for CFD validation. After considering the semi-steady state field data requirements to be used for CFD validation, a neutral atmosphere campaign period, in which the main wind direction and the power-law exponent of the wind profile were constantly maintained, was chosen. The campaign site at the Pohang Accelerator Laboratory, surrounded by 40~50m high hills, with an apartment district spread beyond the hills, is to be classified as a semi-complex terrain. Nevertheless, wind speed profiles measured up to 100m above the ground fitted well into a theoretical-experimental logarithmic-law equation. The LIDAR remote-sensing data of the sub-layer of the atmospheric boundary layer has been proven to be superior to the data obtained by conventional extrapolation of the wind profile with 2 or 3 anemometer measurements.
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KEYWORD
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Remote sensing, LIDAR, Complex terrain, Atmospheric boundary layer, Power-law, Logarithmic-law
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