The Spatio-temporal Change of Nighttime Lights Intensity in Provinces,  South Korea,  during COVID-19 Pandemic Era

Minho Kim

doi:10.22905/kaopqj.2021.55.2.4

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2021 Vol.55, Issue 2 Preview Page Next Page

Research Article

The Spatio-temporal Change of Nighttime Lights Intensity in Provinces, South Korea, during COVID-19 Pandemic Era 코로나바이러스감염증-19 대유행에 따른 광역시도별 야간 인공조명 강도의 시공간 변화

30 June 2021. pp. 183-192

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Abstract

The COVID-19 has recently entered into global pandemic era, which impacted on the shrinkage of world economy in accordance with inter-nation movement limit and local-level lockdown. The province-level distinction of nighttime light (NTL) change, associated with COVID-19 pandemic, was reported by previous research for China and India. This study investigated the spatio-temporal patterns of NTL change for provinces of South Korea. To do so, it utilized Day/Night Band (DNB) March images of 2019, 2020 and 2021, which were collected by Visible Infrared Imaging Radiometer Suite (VIIRS) sensor onboard Suomi National Polar-orbiting Partnership (SNPP) satellite. The considerable dimming of NTL was observed in Seoul Metropolitan City, Gyeonggi Province, and Incheon Metropolitan City whose cumulative COVID-19 confirmed cases were higher than the others. Province-level NTL changes between pre-pandemic and pandemic periods of this communicable disease were also confirmed by Wilcoxon signed rank test. It would be required to perform time-series statistical analysis, incorporating other the other variables potentially related to NTL change, in future study.

Keywords

COVID-19

pandemic

nighttime light

SNPP VIIRS DNB

metropolitan cities and provinces

최근 코로나바이러스감염증-19(이하 코로나-19)는 전 세계적 대유행 단계에 접어들었으며, 국가 간 이동제한 및 지역봉쇄에 따라 세계 경제에 부정적 영향을 미치고 있다. 중국과 인도를 대상으로 수행된 선행연구는 야간 인공위성 영상자료를 통해 코로나-19 대유행에 따른 인공조명 세기 변화의 지역별 차이가 발생함을 보고한 바 있다. 본 연구는 2019년, 2020년, 2021년 3월 SNPP VIIRS DNB 영상자료를 활용하여 코로나-19의 전국적 확산과 맞물린 야간 인공조명의 광역시도별 시공간 변화 패턴을 고찰하였다. 코로나-19 누적 확진자가 많이 발생한 서울특별시, 인천광역시와 경기도를 포함한 수도권 지역에서 다른 지역보다 큰 폭의 야간 조도 감소가 나타났다. 통계분석 결과에 따르면 두 시기 간 광역시도별 빛합계지수에 유의미한 차이가 있는 것으로 확인되었다. 향후 연구에서는 야간 조도에 영향을 미칠 수 있는 다른 변인을 포함한 시계열 모형 기반 분석의 수행 필요성이 제기된다.

키워드

코로나바이러스감염증-19

대유행

야간 조도

SNPP VIIRS DNB

광역시도

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Information

Publisher :The Korean Association of Professional Geographers
Publisher(Ko) :국토지리학회
Journal Title :국토지리학회지
Journal Title(Ko) :THE GEOGRAPHICAL JOURNAL OF KOREA
Volume : 55
No :2
Pages :183-192
Received Date : 2021-06-03
Revised Date : 2021-06-15
Accepted Date : 2021-06-16
DOI :https://doi.org/10.22905/kaopqj.2021.55.2.4

국토지리학회지 ISSN:1225-3766(Print) THE GEOGRAPHICAL JOURNAL OF KOREA

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