Thermodynamic Characteristics Associated with Localized Torrential Rainfall Events in the Middle West Region of Korean Peninsula

Jung, Se Hwan; Kwon, Tae-Yong; Han, Sang-Ok

doi:10.14191/atmos.2014.24.4.457

Cited by 7 publications

(6 citation statements)

References 14 publications

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“…6). All of the durations and maximum rain areas of LTR events (6 complete life cycle cases in this study and 9 cases in the previous study (Jung et al, 2014) were less than 10 h and 2,500 km 2 for a 30 mm h −1 rain rate, respectively, and the averages were 4 h 10 min and 470 km 2 , respectively (Fig. 6a).…”

Section: Thermodynamic Conditionssupporting

confidence: 55%

“…The thermodynamic characteristics of LTR events in the middle-west region of the Korea peninsula (Jung et al, 2014) are illustrated in Table 6 to compare the results with those of this study. The thermodynamic indices were calculated using radiosonde observation data at Osan.…”

Section: Thermodynamic Conditionsmentioning

confidence: 85%

“…The average duration of rain cells in the south-west is shown as 6 h 45 min, 8 h in the middle-west. The previous study (Jung et al, 2014) suggested that the correlation (R) between SRH and duration in the middle-west region of the Korean peninsula was (R = 0.76), but that the south-west was relatively low at R = 0.24, and that the correlation for all events including LTR in both regions was R = 0.44. The SRH of LTR events in the south western Korean peninsula are generally lowers than those in the middle-west, except for in one case.…”

Section: Thermodynamic Conditionsmentioning

confidence: 92%

“…The first criterion in this study is that, ASOS hourly rainfall from any of the six stations should exceed 30 mm h −1 , and as a result a total of 78 cases of heavy rainfall events are occurring during the summer season over the last decade (2004-2013) were identified. Jung et al (2014) found that most of the heavy rainfall events related synoptic conditions such as typhoon, changma front, low-pressure systems, and edge part of high-pressure systems. The rain areas associated with the three synoptic conditions except edge part of high-pressure systems were generally larger than 20,000 km 2 , where rain fell at a rate of > 1 mm h −1 .…”

Section: Data and Methods Of Analysis A Datamentioning

confidence: 99%

“…Secondly, the study examines and discusses the relationship between thermodynamic conditions and precipitation characteristics. Results of this study are then measured against the results of a previous study (Jung et al, 2014) that examined events in the middle-west region of the Korean peninsula. The paper is structured as follows: Section 2 of this study describes the data and selection criteria for determining LTR events; Section 3 discusses the precipitation characteristics obtained from an analysis of rain cells.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic characteristics associated with localized torrential rainfall events in the southwest region of the Korean peninsula

Jung

Kwon

Han

et al. 2015

Asia-Pacific J Atmos Sci

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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)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(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 ).

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Section: Thermodynamic Conditionssupporting

confidence: 55%

Section: Thermodynamic Conditionsmentioning

confidence: 85%

Section: Thermodynamic Conditionsmentioning

confidence: 92%

Section: Data and Methods Of Analysis A Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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