Research in brief

- Name: 구자호 Ja-Ho Koo

- Position: Assistant Professor, Department of Atmospheric Sciences, Yonsei University (연세대학교 대기과학과 조교수)

- Office: 50 Yonsei-ro (Science Hall, Room 539), Seodaemun-gu, Seoul, Republic of Korea, 03722

- Tel: 82-2-2123-5694

- Email: zach45 at yonsei dot ac dot kr

Pure, Elsevier profile

https://yonsei.pure.elsevier.com/en/persons/ja-ho-koo/fingerprints/

Scopus profile

https://www.scopus.com/authid/detail.uri?authorId=36169854600

RESEARCH INTERESTS

• Ozone, halogen, and NO_x chemistry in the atmosphere

• Surface and columnar aerosol characteristics

• Influence of meteorology and climate variability to the local atmospheric chemistry

• Climatology of global trace gases from satellite measurements

• Polar environmental issues (e.g., ozone and mercury deposition events)

PERFORMED PROJECTS

1. East-Asian air pollution and quality issues

- Diagnosis of regional aerosol pollution in East Asia based on ground-based and satellite measurements

- Investigation of transport influence to the extent of local aerosol pollutants

- Analysis of regional meteorology and large-scale climate variability to figure our the long-term variation of regional gas and aerosol concentration.

- Supporting/associated Programs:

KORUS-AQ (https://espo.nasa.gov/home/korus-aq/content/KORUS-AQ)

GEMS (Geostationary Environment Monitoring Spectrometer on GK-2B satellite, http://gems1.yonsei.ac.kr)

EMeRGe international (Effect of Megacities on the transport and transformation of pollutants on the Regional and Global scales, http://www.iup.uni-bremen.de/emerge/home/inter_KR.html)

Pandora (http://data.pandonia.net/)

2. Tropospheric and stratospheric features of global trace gases

- Climatology of a large number of atmospheric trace gases in the global scale based on the vertical profile information from the solar occultation technique of satellite observations

- Large-scale pattern of their spatiotemporal characteristics and relationship to the atmospheric circulation and varaibilities

- Monitoring the total column ozone and vertical structure of stratospheric ozone using the Dobson and Brewer spectrophotometer

- Supporting/associated Programs:

ACE-FTS (Atmospheric Chemistry Experiment with Fourier Transform Spectrometer on SCISAT satellite, http://www.ace.uwaterloo.ca/)

WOUDC (World Ozone and Ultraviolet radiation Data Center, http://www.woudc.org/)

3. Aerosol optical properties and type classification

- Regional features of aerosol optical properties (e.g., aerosol optical depth, single scattering albedo, etc.) and surface aerosol pollution (e.g., PM₁₀ and PM_2.5, amount of black and organic carbon, etc.)

- Wavelength dependence of aerosol optical properties based on the ground (e.g. skyradiometer) and satellite (e.g., MODIS) measurements, and its application to the aerosol classification

- Particulate matter (PM_2.5 or PM₁₀) estimation using aerosol optical properties and meteorological factors

- Supporting/associated Programs:

AERONET (https://aeronet.gsfc.nasa.gov/)

SKYNET (http://skyrad.sci.u-toyama.ac.jp/)

4. The characteristic of polar atmospheric chemistry

- Spatiotemporal scale and structure of near-surface ozone depletion and halogen chemistry in the polar spring based on the in-situ surface, ozonesonde, and aircraft measurements and satellite (e.g., OMI and GOME-2) observations

- Long-term pattern of polar surface ozone compared to the large scale atmospheric pattern and climate variability based on the global reanalysis data (e.g., NCEP/NCAR reanalysis dataset).

- Supporting/associated Programs:

ARCTAS (the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites, https://espo.nasa.gov/arctas/)

ACMAP (the Atmospheric Composition Modeling and Analysis Program from NASA,

https://science.nasa.gov/earth-science/programs/research-analysis/atmospheric-composition/)