Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2017.10.013 |
Enhancement of orographic precipitation in Jeju Island during the passage of Typhoon Khanun (2012) | |
Lee, Jung-Tae1; Ko, Kyeong-Yeon2; Lee, Dong-In3; You, Cheol-Hwan4; Liou, Yu-Chieng5 | |
2018-03-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 201页码:58-71 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea; Taiwan |
英文摘要 | Typhoon Khanun caused over 226 mm of accumulated rainfall for 6 h (0700 to 1300 UTC), localized around the summit of Mt. Halla (height 1950 m), with a slanted rainfall pattern to the northeast. In this study, we investigated the enhancement mechanism for precipitation near the mountains as the typhoon passed over Jeju Island via dual-Doppler radar analysis and simple trajectory of passive tracers using a retrieved wind field. The analysis of vertical profiles of the mountain region show marked features matching the geophysical conditions. In the central mountain region, a strong wind (>= 7 m s(-1)) helps to lift low-level air up the mountain. The time taken for lifting is longer than the theoretical time required for raindrop growth via condensation. The falling particles (seeder) from the upper cloud were also one of the reasons for an increase in rainfall via the accretion process from uplifted cloud water (feeder). The lifted air and falling particles both contributed to the heavy rainfall in the central region. In contrast, on the leeward side, the seeder-feeder mechanism was important in the formation of strong radar reflectivity. The snow particles (above 5 kin) were accelerated by strong downward winds (<= -6 m s(-1)). Meanwhile, the nonlinear jumping flow (hydraulic jump) raised feeders (shifted from the windward side) to the upper level where particles fall. To support these development processes, a numerical simulation using cloud-resolving model theoretically carried out. The accreting of hydrometeors may be one of the key reasons why the lee side has strong radar reflectivity, and a lee side weighted rainfall pattern even though lee side includes no strong upward air motion. |
英文关键词 | Jeju Island Khanun Orographic precipitation Seeder-feeder Hydraulic jump |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418981500005 |
WOS关键词 | 3-DIMENSIONAL WIND FIELDS ; IMMERSED BOUNDARY METHOD ; VARIATIONAL METHOD ; MOUNTAIN-RANGE ; MT. HALLA ; FLOW ; RADAR ; AIR ; SIMULATION ; TERRAIN |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/38247 |
专题 | 地球科学 |
作者单位 | 1.Pukyong Natl Univ, Div Earth Environm Syst Sci, Busan, South Korea; 2.Korea Meteorol Adm, Numer Modeling Ctr, Seoul, South Korea; 3.Pukyong Natl Univ, Dept Environm Atmospher Sci, Busan, South Korea; 4.Dong A Univ, Natl Res Ctr Disaster Free & Safe Ocean City, Busan, South Korea; 5.Natl Cent Univ, Dept Atmospher Sci, Jhongli, Taiwan |
推荐引用方式 GB/T 7714 | Lee, Jung-Tae,Ko, Kyeong-Yeon,Lee, Dong-In,et al. Enhancement of orographic precipitation in Jeju Island during the passage of Typhoon Khanun (2012)[J]. ATMOSPHERIC RESEARCH,2018,201:58-71. |
APA | Lee, Jung-Tae,Ko, Kyeong-Yeon,Lee, Dong-In,You, Cheol-Hwan,&Liou, Yu-Chieng.(2018).Enhancement of orographic precipitation in Jeju Island during the passage of Typhoon Khanun (2012).ATMOSPHERIC RESEARCH,201,58-71. |
MLA | Lee, Jung-Tae,et al."Enhancement of orographic precipitation in Jeju Island during the passage of Typhoon Khanun (2012)".ATMOSPHERIC RESEARCH 201(2018):58-71. |
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