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Professor
Chang-Hoi Ho

Research Associate
Hye-Ryun Oh

Students
Heeje Cho
Sun-Kyong Hur
Hyeon-Ju Gim
Woosuk Choi
Greem Lee
Hoonyoung Park
Dasol Kim
Jin-Woo Heo
Minhee Chang
Chang-Kyun Park
Hung-Ming Cheung
Chaehyeon Nam
JeongMin Yun
Ikho Kim
Yeojin Han
Jiyoung Jung

Past Members










Yong-Sang Choi

School of Earth and Environmental Sciences
Seoul National University 501-506,
Seoul 151-742 Korea
Tel: 82-2-880-5705 Fax: 82-2-876-6795

Email: yschoi@cpl.snu.ac.kr

Profile
[Current Position]
2007.9-the present
Postdoctoral research fellow, School of Earth and Environmental Sciences,
Seoul National University

[Education]
2007.8
Ph.D. in Atmospheric Science, School of Earth and Environmental Sciences,
Seoul National University, Korea, dissertation title: Remote Sensing of
cloud properties from the satellite mulispectral imagery and its
application to study of cloud radiative effect

2000.2
BA in both Earth Science Education and Statistics,
Department of Earth Science Education, Seoul National University, Korea

[Awards]
2007.8.30: The best thesis prize for a doctorate of College of Natural Science at Seoul National University
2007.10.25: The best thesis prize for a doctorate of Korean Meteorolgical Society

[Professional Experience]
2006.4-2007.3
Visiting Scientist, Gothenburg University, Sweden under the guidance of Prof. D. Chen

2004.12-2005.2
Visiting Scientist, National Taiwan University, Taiwan under the guidance of Dr. M.-D. Chou

2003.12-2004.1
Visiting Scientist, National Central University, Taiwan under the guidance of Dr. C.-H. Sui

2002.8-12
Completion of Intensive English Program, University of British Colombia, Canada

2000.3-2002.6
Service as an army officer (ROTC)

Expertise
-Satellite cloud retrieval and application
-Cloud radiative feedback
-Aerosol-cloud-precipitation interaction

Publications
Park, M.-S., C.-H. Ho, H. Cho, and Y.-S. Choi, 2015, Retrieval of Outgoing Longwave Radiation from COMS Narrowband Infrared Imagery, Advances in Atmospheric Sciences, 32(3),375-388. doi: 10.1007/s00376-014-4013-7.

Choi, Y.-S. and C.-H. Ho, 2015, Earth and environmental remote sensing community in South Korea: A review, Remote Sensing Applications: Society and Environment, 2, 66-76,

Choi, Y.-S., C.-H. Ho, C.-E. Park, T. Storelvmo, and I. Tan, 2014, Influence of cloud phase composition on climate feedbacks, Journal of Geophysical Research, 119, 3687-3700, DOI: 10.1002/2013JD020582

Choi, Y.-S., B.-M. Kim, S.-K. Hur, S.-J. Kim, J.-H. Kim, and C.-H. Ho, 2014, Connecting early summer cloud-controlled sunlight and late summer sea ice in the Arctic, Journal of Geophysical Research, 119, 11,087–11,099, doi:10.1002/2014JD022013.

Choi, Y.-S., H. Cho, C.-H. Ho, R. S. Lindzen, S. K. Park, and X. Yu, 2014, Influence of non-feedback variations of radiation on the determination of climate feedback, Theoretical and Applied Climatology, 115(1-2), 355-364. doi:10.1007/s00704-013-0998-6

Oh, H.-R., C.-H. Ho, and Y.-S. Choi, 2013, Comments on “Direct radiative forcing of anthropogenic aerosols over oceans from satellite observation”, Advances in Atmospheric Science, 30(1), 10-14, doi: 10.1007/s00376-012-1218-5

Oh, H. R., Choi, Y. S., Ho, C. H. and M. J. Jeong, 2013, Estimation of aerosol direct radiative effects for all-sky conditions from CERES and MODIS observations, Journal of Atmospheric and Solar-Terrestrial Physics, 102 : 311-320

Cho, H., C.-H. Ho, and Y.-S. Choi, 2012, The observed variation in cloud-induced longwave radiation in response to sea surface temperature over the Pacific warm pool from MTSAT-1R imagery, Geophysical Research Letters, 39, L18802. doi:10.1029/2012GL052700

Park, T-W, C.-H. Ho, S.-J Jeong, Y.-S. Choi, S. K. Park, and C.-K. Song, 2011, Different Characteristics of Cold Day and Cold Surge Frequency over East Asia in a Global Warming Situation, Journal of Geophysical Research , 116, D12118, doi:10.1029/2010JD015369

Jeong, J.-H., C.-H. Ho, S.-J. Jeong, Y.-S. Choi, H. Linderholm, and D. Chen, 2011, Impact of urban warming on earlier spring flowering in Korea, International Journal of Climatology, Online first, doi: 10.1002/joc.2178

Choi, Y.-S., C.-H. Ho, S.-W. Kim, and R. S. Lindzen, 2010, Abundant supercooled clouds in the winter Antarctic atmosphere observed in MODIS and CALIOP measurements, Advances in Atmospheric Science, 27(6), 1233-1245

Ho, C.-H., Y.-S. Choi, and S.-K. Hur, 2009, Long-term changes in summer weekend effect over northeastern China and the connection with regional warming , Geophysical Research Letter, 36, L15706, doi:10.1029/2009GL039509

Song, C.-K., C.-H. Ho, R. J. Park, Y.-S. Choi, J. Kim, D.-Y. Gong, and Y.-B. Lee, 2009, Spatial and Seasonal Variations of Surface PM10 Concentration and MODIS Aerosol Optical Depth over China, Asia-Pacific Journal of Atmospheric Sciences, 45(1), 33-43.

Choi, Y.-S., C.-H. Ho, H.-R. Oh, R. J. Park, and C.-G. Song, 2009, Estimating bulk optical properties of aerosols over the western North Pacific by using MODIS and CERES measurements, Atmospheric Environment , 43, 5654-5660, doi:10.1016/j.atmosenv.2009.07.036

Choi, Y.-S., and C.-H. Ho, 2009, Validation of the cloud property retrievals from the MTSAT-1R imagery using MODIS observations, International Journal of Remote Sensing, 30(22), 5935-5985

Choi, Y.-S., C.-H. Ho, D.-Y. Gong, J.-H. Jeong, and T.-W. Park, 2009, Adaptive change in intra-winter distribution of relatively cold events to East Asian warming, Terrestrial, Atmospheric and Oceanic Sciences, 20(6), 807-816

Choi, Y.-S., R. Park, and C.-H. Ho, 2009, Estimates of ground-level aerosol mass concentrations using a chemical transport model with Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol observations over East Asia, Journal of Geophysical Research, 114, D04204, doi:10.1029/2008JD011041

Choi, Y.-S., C.-H. Ho, D. Chen, Y.-H. Noh, and C.-K. Song, 2008, Spectral analysis of weekly variation in PM10 mass concentration and environment conditions over China, Atmospheric Environment, 42(4), 655–666.

Ho, C.-H., M.-S. Park, Y.-S. Choi, and Yukari N. Takayabu , 2008, Relationship between intraseasonal oscillation and diurnal variation of summer rainfall over the South China Sea, Geophysical Research Letters, 35, L03701, doi:10.1029/2007GL031962.

Choi, Y.-S., C.-H. Ho, D.-Y. Gong, R. Park, and J. Kim, 2008, The impact of aerosols on the summer rainfall frequency in China, Journal of Applied Meteolorogy and Climatology, 47, 1802–1813

Choi, Y.-S., C.-H. Ho, B.-G. Kim, and S.-K. Hur, 2008, Long-term variation in midweek/weekend cloudiness difference during summer in Korea, Atmospheric Environment, 42(28), 6726–6732

Park, M.-S., Y.-S. Choi, C.-H. Ho, C.-H. Sui, S.-K. Park, and M.-H. Ahn, 2007, Regional cloud characteristics over the tropical northwestern Pacific as revealed by Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar and TRMM Microwave Imager, Journal of Geophysical Research, 112, D05209, doi:10.1029/2006JD007437

Gong, D.-Y., C.-H. Ho, D. Chen, Y. Qian, Y.-S. Choi, and J. Kim, 2007, Weekly cycle of aerosol-meteorology interaction over China, Journal of Geophysical Research, 112, D22202, doi:101029/2007JD008888.

Choi, Y.-S., C.-H. Ho, M.-H. Ahn, and Y.-M. Kim, 2007, An exploratory study of cloud remote sensing capabilities of the Communication, Ocean and Meteorological Satellite (COMS) imagery, International Journal of Remote Sensing, 28, 4715-4732.

Choi, Y.-S., and C.-H. Ho, 2006, Radiative effect of cirrus with different optical properties over the tropics in MODIS and CERES observations, Geophysical Research Letters, 33, L21811,doi:10.1029/2006GL027403, Editor's Highlight

Choi, Y.-S., C.-H. Ho, M.-H. Ahn, and Y.-S. Kim, 2005, Enhancement of the consistency of MODIS thin cirrus with cloud phase by adding 1.6-㎛ reflectance, International Journal of Remote Sensing, Vol. 26, No. 21, 4669 - 4680, doi: 10.1080/01431160500239305

Choi, Y.-S., C.-H. Ho, and C.-H. Sui, 2005, Different Optical Properties of High Cloud in GMS and MODIS Observations, Geophysical Research Letters, 32, L23823, doi:10.1029/2005GL024616

유정문,정명재,이규태,김준,허창회,안명환,허영민,이주은,유혜림,정주용,신인철,최용상,김영미,이윤곤,이재화,윤종민,이원학, 2007, 레일리 대기에서 단파 영역에서의 복사전달모델 결과들의 상호 비교, 한국지구과학회지, 제28권 3호

Oh, H.-R., Y.-S. Choi, C.-H. Ho and M.-H. Ahn, 2006, Development of Sky Cover Retrieval Algorithm for the Communication, Ocean and Meteorological Satellite (COMS) Imagery, Journal of the Korean Meteorological Society, Vol. 42, No. 6


Conference
2007 Fall KMS Conference
2007.10/Seoul
S., C.-H. Ho, D.-Y. Gong, R. Park, and J. Kim, The impact of aerosols on the summer rainfall frequency in China
Oral

The 5th Climate Change Conference
2007.08/Seoul
Choi, Y.-S., Dao-Yi Gong, C.-H. Ho, and J. Kim, Weekly cycle of aerosol-meteorology interaction over China
Oral

The Fourth International Ocean-Atmosphere Conference (COAA2007)
2007.6/Qingdao
Choi, Y.-S., and C.-H. Ho, Radiative effect of cirrus with different optical properties over the Tropics
Oral

The 2006 EUMETSAT Meteological Satellite Conference
2006.6.13/Helsinki
Choi, Y.-S., C.-H. Ho, Y.-M. Kim, M.-H Ahn, Retrieval of cloud properties using COMS imagery
Poster

GAC-C2 Conference
2006.5.29/Gothenburg
Choi, Y.-S., and C.-H. Ho, Different optical properties of high cloud in GMS and MODIS observations
Oral

The 5th International Symposium on Asian Monsoon System
2005.10.13/Yongpyong
Y.-S. Choi, C.-H. Ho, C.-H. Sui, Different Optical Properties of High Cloud in GMS and MODIS Observations
Oral

The 2005 Spring KMS Conference
2005.4.29/Kangnung
Y.-S. Choi, C.-H. Ho, Y. -M. Kim, Perspective of COMS Cloud Analysis Algorithm: High Semi-transparent and Multi-layer Clouds
Oral

The 2004 Fall KMS Conference
2004.10.29/Kongju
Y.-S. Choi, and C.-H. Ho, Cloud Analysis Algorithm by using 5 channels in COMS
Oral

International Radiation Symposium 2004
2004.8.25/Busan
Y.-S. Choi, and C.-H. Ho, Enhancement of the consistency of MODIS thin cirrus with cloud phase by adding 0.6- and 1.6um reflectances
Oral

The 2004 EUMETSAT Meteological Satellite Conference
2004.6.1/Prague
Y.-S. Choi, and C.-H. Ho, Improvement of MODIS thin cirrus detection: Preliminary study using NIR 1.6�� reflectance
Poster
>> proceeding

The 2004 Spring KMS Conference
2004.3.36/Seoul
Y.-S. Choi, and C.-H. Ho, Improvement of MODIS thin cirrus detection: Preliminary study using NIR 1.6�� refletance
Oral

The 2003 Fall KMS Conference
2003.10.27/Seoul
Y.-S. Choi, and C.-H. Ho, Comparitive Studies of Cloud Retrieval Algorithm Between MODIS/Terra and SEVIRI/MSG
Oral


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