Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-20-7373-2020 |
Microphysics and dynamics of snowfall associated with a warm conveyor belt over Korea | |
Gehring, Josue1; Oertel, Annika2; Vignon, Etienne1; Jullien, Nicolas3; Besic, Nikola4; Berne, Alexis1 | |
2020-06-25 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:12页码:7373-7392 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; France |
英文摘要 | On 28 February 2018, 57mm of precipitation associated with a warm conveyor belt (WCB) fell within 21 h over South Korea. To investigate how the large-scale circulation influenced the microphysics of this intense precipitation event, we used radar measurements, snowflake photographs and radiosounding data from the International Collaborative Experiments for Pyeongchang 2018 Olympic and Paralympic-Winter Games (ICE-POP 2018). The WCB was identified with trajectories computed with analysis wind fields from the Integrated Forecast System global atmospheric model. The WCB was collocated with a zone of enhanced wind speed of up to 45ms(-1) at 6500ma.s.l., as measured by a radiosonde and a Doppler radar. Supercooled liquid water (SLW) with concentrations exceeding 0.2 g kg(-1) was produced during the rapid ascent within the WCB. During the most intense precipitation period, vertical profiles of polarimetric radar variables show a peak and subsequent decrease in differential reflectivity as aggregation starts. Below the peak in differential reflectivity, the specific differential phase shift continues to increase, indicating early riming of oblate crystals and secondary ice generation. We hypothesise that the SLW produced in the WCB led to intense riming. Moreover, embedded updraughts in the WCB and turbulence at its lower boundary enhanced aggregation by increasing the probability of collisions between particles. This suggests that both aggregation and riming occurred prominently in this WCB. This case study shows how the large-scale atmospheric flow of a WCB provides ideal conditions for rapid precipitation growth involving SLW production, riming and aggregation. Future microphysical studies should also investigate the synoptic conditions to understand how observed processes in clouds are related to large-scale circulation. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000543786800004 |
WOS关键词 | SECONDARY ICE PARTICLES ; POLARIMETRIC RADAR ; HYDROMETEOR CLASSIFICATION ; MIDLATITUDE CYCLONES ; ATMOSPHERIC RIVERS ; WINTER STORMS ; PART I ; PRECIPITATION ; CLOUDS ; FLOW |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/278058 |
专题 | 地球科学 |
作者单位 | 1.Ecole Polytech Fed Lausanne EPFL, Environm Remote Sensing Lab LTE, Lausanne, Switzerland; 2.Eidgenoss TH Zurich ETH, Inst Atmospher & Climate Sci IAC, Zurich, Switzerland; 3.Univ Fribourg, Dept Geosci, Fribourg, Switzerland; 4.Meteo France, Ctr Meteorol Radar, Toulouse, France |
推荐引用方式 GB/T 7714 | Gehring, Josue,Oertel, Annika,Vignon, Etienne,et al. Microphysics and dynamics of snowfall associated with a warm conveyor belt over Korea[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(12):7373-7392. |
APA | Gehring, Josue,Oertel, Annika,Vignon, Etienne,Jullien, Nicolas,Besic, Nikola,&Berne, Alexis.(2020).Microphysics and dynamics of snowfall associated with a warm conveyor belt over Korea.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(12),7373-7392. |
MLA | Gehring, Josue,et al."Microphysics and dynamics of snowfall associated with a warm conveyor belt over Korea".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.12(2020):7373-7392. |
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