Research Article

Korean J. Remote Sens. 2024; 40(4): 377-385

Published online: August 31, 2024

https://doi.org/10.7780/kjrs.2024.40.4.5

© Korean Society of Remote Sensing

지상 기반 태양 UV 산란광 관측을 이용한 이산화황 경사칼럼농도 산출 시 파장 구간 및 흡수단면적에 따른 영향 조사

박 경1, 공부주2, 김민지3, 이한림4*

1국립부경대학교 지구환경시스템과학부 공간정보시스템공학전공 석사과정생
2국립환경과학원 대기공학연구과 연구관
3국립환경과학원 대기공학연구과 연구사
4국립부경대학교 지구환경시스템과학부 위성정보융합공학전공 교수

Received: July 31, 2024; Revised: August 12, 2024; Accepted: August 19, 2024

Investigation of the Effects of Wavelength Range and Absorption Cross-Section on Sulfur Dioxide Slant Column Density Retrieval Using Ground-Based UV Scattered Sunlight Measurement

Gyeong Park1, Buju Gong2, Minji Kim3, Hanlim Lee4*

1Master Student, Major of Spatial Information Engineering, Division of Earth Environmental System Sciences, Pukyong National University, Busan, Republic of Korea
2Senior Researcher, Air Pollution Engineering Division, National Institute of Environmental Research, Incheon, Republic of Korea
3Researcher, Air Pollution Engineering Division, National Institute of Environmental Research, Incheon, Republic of Korea
4Professor, Major of Geomatics Engineering, Division of Earth Environmental System Sciences, Pukyong National University, Busan, Republic of Korea

Correspondence to : Hanlim Lee
E-mail: hllee@pknu.ac.kr

Received: July 31, 2024; Revised: August 12, 2024; Accepted: August 19, 2024

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We investigated the effect of spectral fitting wavelength interval variations and selection of absorption cross-section on the sulfur dioxide slant column density (SCD) retrievals from the scattered sunlight observation using a UV-Vis hyperspectral instrument. The sulfur dioxide slant column densities were retrieved from the combinations of multiple spectral fitting intervals and absorption cross-sections. The observation was carried out at the site 0.53 km away from a combustion site located in Gimhae from December 1, 2023, to January 23, 2024. The radiances were obtained on the line of measurement sight toward the stack of the combustion facility. The best spectral fitting intervals were found to be from 305.7 to 321.1 nm. In terms of the absorption cross-section dependency, the SO2 (293 K), O3 (223 K, 243 K) show the best spectral fitting for the observed radiances with both the smallest fitting residual and SCD error. The effects of the fitting interval and cross sections found in this study can be useful information for improving SO2 retrievals based on UV hyperspectral measurements.

Keywords Sulfur dioxide, Remote sensing, Differential optical absorption spectroscopy

Research Article

Korean J. Remote Sens. 2024; 40(4): 377-385

Published online August 31, 2024 https://doi.org/10.7780/kjrs.2024.40.4.5

Copyright © Korean Society of Remote Sensing.

지상 기반 태양 UV 산란광 관측을 이용한 이산화황 경사칼럼농도 산출 시 파장 구간 및 흡수단면적에 따른 영향 조사

박 경1, 공부주2, 김민지3, 이한림4*

1국립부경대학교 지구환경시스템과학부 공간정보시스템공학전공 석사과정생
2국립환경과학원 대기공학연구과 연구관
3국립환경과학원 대기공학연구과 연구사
4국립부경대학교 지구환경시스템과학부 위성정보융합공학전공 교수

Received: July 31, 2024; Revised: August 12, 2024; Accepted: August 19, 2024

Investigation of the Effects of Wavelength Range and Absorption Cross-Section on Sulfur Dioxide Slant Column Density Retrieval Using Ground-Based UV Scattered Sunlight Measurement

Gyeong Park1, Buju Gong2, Minji Kim3, Hanlim Lee4*

1Master Student, Major of Spatial Information Engineering, Division of Earth Environmental System Sciences, Pukyong National University, Busan, Republic of Korea
2Senior Researcher, Air Pollution Engineering Division, National Institute of Environmental Research, Incheon, Republic of Korea
3Researcher, Air Pollution Engineering Division, National Institute of Environmental Research, Incheon, Republic of Korea
4Professor, Major of Geomatics Engineering, Division of Earth Environmental System Sciences, Pukyong National University, Busan, Republic of Korea

Correspondence to:Hanlim Lee
E-mail: hllee@pknu.ac.kr

Received: July 31, 2024; Revised: August 12, 2024; Accepted: August 19, 2024

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We investigated the effect of spectral fitting wavelength interval variations and selection of absorption cross-section on the sulfur dioxide slant column density (SCD) retrievals from the scattered sunlight observation using a UV-Vis hyperspectral instrument. The sulfur dioxide slant column densities were retrieved from the combinations of multiple spectral fitting intervals and absorption cross-sections. The observation was carried out at the site 0.53 km away from a combustion site located in Gimhae from December 1, 2023, to January 23, 2024. The radiances were obtained on the line of measurement sight toward the stack of the combustion facility. The best spectral fitting intervals were found to be from 305.7 to 321.1 nm. In terms of the absorption cross-section dependency, the SO2 (293 K), O3 (223 K, 243 K) show the best spectral fitting for the observed radiances with both the smallest fitting residual and SCD error. The effects of the fitting interval and cross sections found in this study can be useful information for improving SO2 retrievals based on UV hyperspectral measurements.

Keywords: Sulfur dioxide, Remote sensing, Differential optical absorption spectroscopy

KSRS
October 2024 Vol. 40, No.5, pp. 419-879

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