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학술저널
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한국기상학회 Asia-Pacific Journal of Atmospheric Sciences 한국기상학회지 제40권 제5호
발행연도
2004.10
수록면
531 - 540 (10page)

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Aircraft measured cloud microphysics data for the small cumulus clouds over Florida, USA, produced at 1 ㎐ (1 s average) and 10 ㎐ (0.1 s average) resolutions, are compared to investigate the scale dependence of cloud microphysical relationships. Throughout the entire measurement period, there were total of 222 corresponding 1 ㎐ and 10 ㎐ cloud data files, each of which contained 4-5 individual clouds. First, comparisons of average cloud microphysical parameters revealed that the 1 ㎐ data severely underestimated cloud droplet (diameter < 50 ㎛) number concentrations, compared to the 10 ㎐ data; on average, 1 ㎐ concentration was only 76% of 10 ㎐ concentration. Cloud droplet liquid water content was similarly underestimated by the 1 ㎐ data. Cloud droplet mean diameters, however, are remarkably similar between 1 ㎐ and 10 ㎐. Correspondence was almost as good for the standard deviations of diameter. Secondly, comparisons were made between 1 ㎐ and 10 ㎐ for the two parameters, namely the coefficient (r) of linear correlation between cloud droplet number concentration and mean diameter, and the slope (a) of the linear regression between mean diameter and standard deviation of diameter, which represent some of the important relationships between cloud microphysical parameters. On average r was remarkably similar between 1 ㎐ and 10 ㎐ but, individually, a significant number of data points were located far away from the 1:1 line. Deviation from the 1:1 line is more systematic in a; a is underestimated by 17% by 1 ㎐ data. Those cloud sections that were located closer to the 1:1 line in r and a, and showed remarkably similar mean diameters and standard deviations of diameter between 1 ㎐ and 10 ㎐, may be considered homogeneous between 10 and 100 m scales. However, independent analysis (Fishing-Test) revealed that almost all individual clouds are inhomogeneous. Therefore, homogeneity between 10 and 100 m scales may actually indicate that the degree of inhomogeneity was similar between 10 and 100 m scales for those clouds that showed remarkable similarity between 1 ㎐ and 10 ㎐.

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Abstract
1. 서론
2. 방법
3. 결과
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5. 결론
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