Journal of the Korean earth science society (한국지구과학회지)

The Korean Earth Science Society (한국지구과학회)
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Understanding Impact of the Volcanic Eruption of Nishinoshima, Japan on Air Quality in the South Korean Peninsula

일본 니시노시마 화산 분화에 의한 한반도 남부 대기질 영향 분석

  • Cheolwoo Chang (Department of Earth Science Education, Pusan National University) ;
  • Sung-Hyo Yun (Department of Earth Science Education, Pusan National University)
  • 장철우 (부산대학교 지구과학교육과) ;
  • 윤성효 (부산대학교 지구과학교육과)
  • Received : 2023.06.12
  • Accepted : 2023.06.29
  • Published : 2023.06.30
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Abstract

The Nishinoshima volcano, located 940 km south of Tokyo, experienced an eruption from June to August 2020. The volcanic gas and ash from the eruption of Nishinoshima that occurred at the end of July 2020 was reported to have the potential to affect the Korean Peninsula. In this study, we used Ash3D, a numerical simulation program for volcanic ash dispersion, to investigate the eruption that occurred at 0:00 local time on July 28, 2020, with a volcanic explosivity index of three. The results showed that the volcanic ash cloud reached Okinawa on the morning of July 30, carried by an east wind. It then moved northward and reached Jeju Island on August 1, eventually circulating in a clockwise direction and reaching southern part of the Korean Peninsula on August 2. The concentration of Particulate Matter 10 (PM10), measured at the Jeju Gosan Meteorological Observatory in Jeju Island, increase from August 1. A similar increase in PM10 concentration was observed at the Gudeok Mountain Weather Station in Busan from August 2. These findings suggested that eruption of the Nishinoshima volcano had an impact on the fine dust concentrations at Jeju Island and southern part of the Korean Peninsula.

2020년 6월부터 8월까지 일본 도쿄 남쪽 940 km 해상에 위치한 니시노시마 화산이 분화하였다. 2020년 7월 말 발생한 분화로 인한 화산재와 화산가스 일부가 우리나라에 영향을 주었을 가능성이 있는 것으로 보도되었다. 본 연구에서는 화산재 확산 수치모의 프로그램인 Ash3D를 이용하여 현지시각 2020년 7월 28일 0시에 화산폭발지수 3의 분화가 발생한 것으로 설정하고 수치모의를 실시하였다. 수치모의 결과, 화산재가 니시노시마 인근에서 동풍을 타고 7월 30일 새벽 오키나와에 도달한 이후 남풍을 타고 북상하여 8월 1일 제주도에 상륙하고 시계방향으로 회전하듯이 이동하면서 8월 2일에는 남부지방에 영향을 주는 것으로 나타났다. 실제 측정된 PM10 미세먼지농도는 제주도 고산기상관측소에서 8월 1일부터, 부산 구덕산기상관측소에서는 8월 2일부터 상승한 것으로 나타나 니시노시마 화산 분화가 제주도 및 남부지방의 미세먼지 수치에 영향을 준 것으로 보인다.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었다. 이 논문을 읽고 건설적인 비평과 조언을 주신 심사자와 김기범 교수와 임현수 편집위원장에게 감사드린다.

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