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Comparison of Several Heat Stress Indices for the 2016 Heat Wave in Daegu

대구의 2016년 폭염시기 열 스트레스 지표의 비교

  • Kim, Ji-Hye (Department of Global Environment, Keimyung University) ;
  • Kim, Hae-Dong (Department of Global Environment, Keimyung University)
  • 김지혜 (계명대학교 환경학부 지구환경학과) ;
  • 김해동 (계명대학교 환경학부 지구환경학과)
  • Received : 2017.09.21
  • Accepted : 2017.11.06
  • Published : 2017.12.31

Abstract

We compared the spatial distribution of several heat stress indices (the Wet-Bulb Globe Temperature(WBGT) index, Environmental Stress Index (ESI), and Modified Discomfort Index(MDI)) for the heat wave of June 6~August 26, 2016, in Daegu. We calculated the heat stress indices using data from the high density urban climate observation network in Daegu. The observation system was established in February. 2013. We used data from a total of 38 air temperature observation points (23 thermometers and 18 automatic weather stations). The values of the heat stress indices indicated that the danger level was very high from 0900-2000h in downtown Daegu. The daily maximum value of the WBGT was greater than or equal to $35^{\circ}C$. The differences in the heat stress indices from downtown and rural areas were higher in the daytime than at nighttime. The maximum difference was about 4 before and after 1400h, and the time variations of the heat stress indices corresponded well. Thus, we were able to confirm that the ESI and MDI can be substituted with the WBGT index.

Keywords

Heat stress index;heat wave;wet-bulb globe temperature index;environmental stress index;modified discomfort index

Acknowledgement

Supported by : 한국연구재단

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