文献一覧: Kyu Rang Kim (著者)

4 0 0 0 OA Classification of Homogeneous Regions of Strong Wind and Gust Wind in Korea

著者: Hyunuk Kim Baek-Jo Kim Hyoung-Gu Nam Jonghyeok Jeong Jae-Kwan Shim Kyu Rang Kim Seungbum Kim
出版者: Meteorological Society of Japan
雑誌: SOLA (ISSN:13496476)
巻号頁・発行日: vol.16, pp.140-144, 2020 (Released:2020-08-08)
参考文献数: 35
被引用文献数: 3

In this study, based on the daily maximum wind speed and maximum instantaneous wind speed data recorded at 61 observation points operated by the Korea Meteorological Administration from 1993 to 2018, the self-organizing map clustering method was used to classify regions with similar characteristics of strong wind and gust wind occurrence and intensity. Characteristics of these regions were analyzed by averaging 30 variables related to wind for each cluster. As a result, 13 homogeneous regions of strong wind and gust wind in Korea were identified, which were clearly divided into regions of high and low strong wind frequency of occurrences. In most regions, the average daily maximum wind speed and maximum instantaneous wind speed were high in spring and winter. However, the average daily maximum wind speed and maximum instantaneous wind speed exceeding the criteria of strong wind (14 m s−1) and gust wind (20 m s−1) in this study were high in summer and autumn. Among the four clusters with high occurrence of strong wind and gust wind, one was classified as a specific region with high occurrence in summer and autumn. This results are likely to be beneficial to support regional customized special weather reports and disaster prevention.

2020-08-24 13:15:40
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3 0 0 0 OA Determining Multiple Thresholds for Thermal Health Risk Levels Using the Segmented Poisson Regression Model

著者: Ju-Young Shin Kyu Rang Kim Yong Hee Lee
出版者: Meteorological Society of Japan
雑誌: SOLA (ISSN:13496476)
巻号頁・発行日: vol.18, pp.41-46, 2022 (Released:2022-03-18)
参考文献数: 28

Determining the thresholds for risk assessment is critical for the successful implementation of thermal health warning systems. A risk assessment methodology with multiple thresholds must be developed to provide detailed warning information to the public and decision makers. This study developed a new methodology to identify multiple thresholds for different risk levels for heat or cold wave events by considering simultaneously impact on public health. A new objective function was designed to optimize segmented Poisson regression, which relates public health to temperature indicators. Thresholds were identified based on the values of the objective functions for all threshold candidates. A case study in identifying thresholds for cold and heat wave events in Seoul, South Korea, from 2014 to 2018, was conducted to evaluate the appropriateness of the proposed methodology. Daily minimum or maximum air temperature, mortality, and morbidity data were used for threshold identification and evaluation. The proposed methodology can successfully identify multiple thresholds to simultaneously represent different risk levels. These thresholds show comparable performance to those using the relative frequency approach.

2022-04-09 22:26:43
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3 0 0 0 OA Determining multiple thresholds for thermal health risk levels using the segmented Poisson regression model

著者: Ju-Young Shin Kyu Rang Kim Yong Hee Lee
出版者: Meteorological Society of Japan
雑誌: SOLA (ISSN:13496476)
巻号頁・発行日: pp.2022-007, (Released:2022-01-26)

2022-02-02 00:53:56
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2 0 0 0 OA Examination of the Feasibility of Area-Specific Criteria of Special Weather Report by Estimation of the Threshold Value of Disaster-Causing Strong Winds

著者: Hyunuk Kim Baek-Jo Kim Hyoung-Gu Nam Jonghyeok Jeong Jae-Kwan Shim Kyu Rang Kim Seungbum Kim
出版者: Meteorological Society of Japan
雑誌: SOLA (ISSN:13496476)
巻号頁・発行日: vol.16, pp.180-184, 2020 (Released:2020-10-17)
参考文献数: 22

Strong winds are one of the several factors contributing to natural disasters. Although in recent years, the intensity and frequency of strong winds has decreased, different areas are differently affected by such winds; these winds still have the potential to cause adverse impacts on life and property. In Korea, strong winds are also responsible for the incidence of increased number of accidents and forest fires. Therefore, in this study, relationship between wind speed and damage was analyzed, and the threshold value of damage-causing wind speed was estimated. We first analyzed the relationship between wind speed and damage occurrences based on the daily maximum wind speed and daily maximum instantaneous wind speed data, and data on damage related to strong winds. Second, we examined the validity regarding the regional segmentation of the Korean criteria of special weather report for strong winds using the critical success index and cumulative percentile distributions to estimate the damage-causing threshold value for each region. We found that damage resulting from very strong wind speeds in Korea had not occurred in recent times. In addition, considerable damage had occurred because of low-speed wind compared to the current criteria for high wind advisory. However, the incidence of damage was higher when wind speed was stronger than the current criteria for high wind advisory. Based on threshold estimation, the study areas were categorized into areas with high threshold values (coastal, mountainous, and island), and those with low threshold values (inland areas). A notable difference was observed between the threshold values of the two categories of areas. This necessitated the regional segmentation of the criteria of special weather report on strong winds.

2020-10-20 04:03:40
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2 0 0 0 OA Examination of the feasibility of area-specific criteria of special weather report by estimation of the threshold value of disaster-causing strong winds

著者: Hyunuk Kim Baek-Jo Kim Hyoung-Gu Nam Jonghyeok Jeong Jae-Kwan Shim Kyu Rang Kim Seungbum Kim
出版者: Meteorological Society of Japan
雑誌: SOLA (ISSN:13496476)
巻号頁・発行日: pp.2020-031, (Released:2020-10-02)

2020-10-14 20:52:16
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