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| Content Provider | Springer Nature Link |
|---|---|
| Author | Jung, Sueng Pil Kwon, Tae Yong Han, Sang Ok Jeong, Jong Hyeok Shim, JaeKwan Choi, Byoung Choel |
| Copyright Year | 2015 |
| Abstract | This study uses observational data from radar and radiosonde to investigate the thermodynamic conditions related to localized torrential rainfall (LTR) in the southwest region of the Korean peninsula. Three criteria were defined for selecting LTR events: 1) hourly rainfall exceeding 30 mm h$^{−1}$ recorded at any of the automated synoptic observing systems (ASOS) around Gwangju, 2) an area of rainfall at > 1 mm h$^{−1}$ (as estimated from radar rain rate) of less than 20,000 km$^{2}$, and 3) clearly defined stages of genesis and dissipation in a group of rain cells (> 10 mm h$^{−1}$) with a duration lasting less than 24 hours. As a result, 10 cases were selected from the summer season (June-August) over the last decade (2004-2013). Results showed all cases occurred during the afternoon hours and that the duration and maximum rain area of convective cells (> 30 mm h$^{−1}$) was less than 6 hours and smaller than 700 km$^{2}$, respectively. The majority of cases showed the following thermodynamic characteristics: 1) strong convective available potential energy (CAPE > 1,500 J kg$^{−1}$) related to surface heating, 2) weak (or no) convective inhibition (CIN < 50 J kg$^{−1}$), 3) adequate moisture and total precipitable water (TPW ≈ 55 mm), and 4) values of storm relative helicity (SRH) of less than 10 m$^{2}$ s$^{−2}$. The area of rainfall (700 km$^{2}$) and the duration (6 h) in this experiment were relatively small and short, respectively, compared to those in a previous study in the middle-west region of Korea (1,000 km$^{2}$, 9 h), but a higher CAPE (1,500 J kg$^{−1}$) and lower SRH (10 m$^{2}$ s$^{−2}$) were involved in this study than in the former (800 J kg$^{−1}$, 120 m$^{2}$ s$^{−2}$). |
| Starting Page | 229 |
| Ending Page | 237 |
| Page Count | 9 |
| File Format | |
| ISSN | 19767633 |
| Journal | Asia-Pacific Journal of Atmospheric Sciences |
| Volume Number | 51 |
| Issue Number | 3 |
| e-ISSN | 19767951 |
| Language | English |
| Publisher | Korean Meteorological Society |
| Publisher Date | 2015-08-28 |
| Publisher Place | Seoul |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Localized torrential rainfall thermodynamic characteristics convective cell life cycle radar rainfall radiosonde Atmospheric Sciences Climatology Geophysics/Geodesy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atmospheric Science |
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