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KMID : 1024520030120040393
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Journal of the Environmental Sciences
2003 Volume.12 No. 4 p.393 ~ p.397
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The Characteristics of the Dry Deposition Velocity for O₃ regarding Surface Wetness
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Lee Hwa-Woon
Kim Yoo-Keun
Moon Nan-Kyoung
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Abstract
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It has been researched the relationship between deposition velocity and factors which could affect the deposition phenomena and deposition velocity also has been estimated fer several land-use types. The typical deposition velocities are complex functions of surface types, atmospheric stabilities, friction velocities, air pollutants and so on. The canopy resistance is major contribution to the model’s total resistance for O₃. Canopy wetness is also an important factor to calculate deposition velocity. We considered the canopy wetness as canopy water content(CWC) in our Model. But, it is not easy to observe CWC over each land-use types. In this study, we use CWC observed by EMEFS(CANADA Environment Service, 1988) to examine the influence of CWC in estimation of 03 dry deposition velocity(V/sub d/) in summertime. The value of O₃ V/sub d/ range 0.2 ∼ 0.7 cm s/sup -1/ on dry surface and 0.01 ∼ 0.35 cm s/sup -1/ on wet surface in daytime.
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KEYWORD
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CWC, Canopy wetness, Dry deposition velocity, O₃
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