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KMID : 1024520020110030155
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Journal of the Environmental Sciences
2002 Volume.11 No. 3 p.155 ~ p.160
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Characteristic of the Nocturnal Inversion Layer observed by Tethersonde in Daegu
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Kim Hee-Jong
Yoon Ill-Hee
Kwon Byung-Hyuk
Heo Man-Chun
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Abstract
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Using measured data at Daegu by tethersonde for the period of 1984∼1987, we have investigated the lower atmospheric boundary layer structure including relationships between inversion layer and meteorological factors(wind and temperature), and the inversion strength and inversion height. The inversion layer was defined from the vertical temperature profile and its strength was analyzed with the wind shear as well as the vertical temperature gradient. From October to January, measured inversion layer isn’t destroyed, however, in June, after sun rise, it is destroyed by surface heating and mixed layer is developed from surface. According to Pasquill stability classes, the moderately stable cases dominated. It’s the larger vertical temperature gradient the lower SBL height. We have introduced B(bulk turbulence scale) which indicated SBL height. It’s larger B, the higher SBL height and vice versa. It was noted that the bulk turbulence scale (B) is appropriate to determine the stable boundary layer height.
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KEYWORD
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lower atmospheric construction, inversion layer, inversion strength, inversion height, Pasquill stability, bulk turbulence scale
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