Microphysical processes of a stratiform precipitation event over eastern China: analysis using micro rain radar data
Microphysical processes of a stratiform precipitation event over eastern China: analysis using micro rain radar data
复制标题
中国东部一次层状降水事件的微物理过程:微雨雷达数据分析
DOI:
10.1007/s00376-017-7005-6
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发表时间:
2017-11
影响因子:
5.8
通讯作者:
Yang Jiefan
中科院分区:
文献类型:
--
作者:
Wang Hong;Lei Hengchi;Yang Jiefan
Data collected using the micro rain radar (MRR) situated in Jinan city, eastern China, were used to explore the altitudinal and temporal evolution of rainfall microphysical characteristics, and to analyze the bright band (BB) characteristics and hydrometeor classification. Specifically, a low-intensity and stable stratiform precipitation event that occurred from 0000 to 0550 UTC 15 February 2015 and featured a BB was studied. During this event, the rainfall intensity was less than 2 mm h−1at a height of 300 m, which was above the radar site level, so the errors caused by the vertical air motion could be ignored. The freezing height from the radiosonde matched well with the top of the BB observed by the MRR. It was also found that the number of 0.5–1 mm diameter drops showed no noticeable variation below the BB. The maximum fall velocity and the maximum gradient fall velocity (GFV) of the raindrops appeared at the bottom of the BB. Meanwhile, a method that uses the GFV and reflectivity to identify the altitude and the thickness of the BB was established, with which the MRR can provide a reliable and real-time estimation of the 0°C isotherm. The droplet fall velocity was used to classify the types of snow crystals above the BB. In the first 20 min of the selected precipitation event, graupel prevailed above the BB; and at an altitude of 2000 m, graupel also dominated in the first 250 min. After 150 min, the existence of graupel and dendritic crystals with water droplets above the BB was inferred.
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影响因子:
2.6
作者:
R. Harikumar;S. Sampath;V. Kumar
通讯作者:
R. Harikumar;S. Sampath;V. Kumar
影响因子:
8
作者:
K. Lau;H. Weng
通讯作者:
K. Lau;H. Weng
DOI:
--
发表时间:
1935-01
期刊:
--
影响因子:
--
作者:
U. Nakaya;T. Terada
通讯作者:
U. Nakaya;T. Terada
影响因子:
3.1
作者:
P. Hildebrand;Bernice Ackerman
通讯作者:
P. Hildebrand;Bernice Ackerman
影响因子:
2.2
作者:
Hai-Tien Lee;R. Ellingson
通讯作者:
Hai-Tien Lee;R. Ellingson