| Comparison of the Bright Band Characteristics Measured by Micro Rain Radar （MRR） at a Mountain and a Coastal Site in South Korea |
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| 作者姓名： | Joo-Wan CHA Ki-Ho CHANG Seong Soo YUM Young-Jean CHOI |
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| 作者单位： | Department;Atmospheric;Sciences;Yonsei;University;Global;Environment;System;Research;Laboratory;NIMR/KMA; |
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| 基金项目： | funded by the Korean Meteorological Administration Research and Development Program under Grant CATER 2006-2307. |
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| 摘 要： | Data from a long term measurement of Micro Rain Radar (MRR) at a mountain site (Daegwallyeong,DG, one year period of 2005) and a coastal site (Haenam, HN, three years 2004–2006) in South Korea were analyzed to compare the MRR measured bright band characteristics of stratiform precipitation at the two sites. On average, the bright band was somewhat thicker and the sharpness (average gradient of reflectivity above and below the reflectivity peak) was slightly weaker at DG, compared to those values at HN. The ...
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| 关 键 词： | 特性测量 死亡率 网站 山区 韩国 沿海 雷达 亮带 |
| 收稿时间： | 6 October 2006 |
Comparison of the bright band characteristics measured by Micro Rain Radar (MRR) at a mountain and a coastal site in South Korea |
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| Joo-Wan CHA,Ki-Ho CHANG,Seong Soo YUM,Young-Jean CHOI.Comparison of the bright band characteristics measured by Micro Rain Radar (MRR) at a mountain and a coastal site in South Korea[J].Advances in Atmospheric Sciences,2009,26(2):211-221. |
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| Authors: | Joo-Wan Cha Ki-Ho Chang Seong Soo Yum Young-Jean Choi |
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| Institution: | Department of Atmospheric Sciences, Yonsei University, Korea;
Global Environment System Research Laboratory NIMR/KMA, Korea;Global Environment System Research Laboratory NIMR/KMA, Korea;Department of Atmospheric Sciences, Yonsei University, Korea;Global Environment System Research Laboratory NIMR/KMA, Korea |
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| Abstract: | Data from a long term measurement of Micro Rain Radar (MRR) at a mountain site
(Daegwallyeong, DG, one year period of 2005) and a coastal site (Haenam, HN, three years
2004--2006) in South Korea were analyzed to compare the MRR measured bright band characteristics
of stratiform precipitation at the two sites. On average, the bright band was somewhat
thicker and the sharpness (average gradient of reflectivity above and below the reflectivity
peak) was slightly weaker at DG, compared to those values at HN. The peak reflectivity
itself was twice as strong and the relative location of the peak reflectivity within the
bright band was higher at HN than at DG. Importantly, the variability of these values was
much larger at HN than at DG. The key parameter to cause these differences is suggested
to be the difference of the snow particle densities at the two sites, which is related to
the degree of riming. Therefore, it is speculated that the cloud microphysical processes
at HN may have varied significantly from un-rimed snow growth, producing low density snow
particles, to the riming of higher density particles, while snow particle growth at DG was
more consistently affected by the riming process, and therefore high density snow particles.
Forced uplifting of cloudy air over the mountain area around DG might have resulted in an
orographic supercooling effect that led to the enhanced riming of supercooled cloud drops. |
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| Keywords: | Micro Rain Radar bright band thickness and sharpness cloud microphysical processes local characteristics |
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