• Peer Review: Nature Geoscience, Applied Geography, J. Clim., J. Hydrometeorology, Clim. Dyn., Int. J. Climatol., Geophys. Res. Lett., Meteorol. Atmos. Phys., Q. J. R. Meteorol. Soc., Earth Interactions, Geoscience and Remote Sensing Letters, Climate Research, Atmospheric Environment, J. Arid Environments, Climate of the Past, J. Hydrology, Energies, J. Ecology & Natural Environment, J. Korean Geographical Society, J. Korean Regional Geographical Society, and J. Clim. Res.
• Proposal Review: NSF Climate & Large-Scale Dynamics, UK Natural Environment Research Council
• Editorial/Research Board (since 2009): Climate Research Institute, Seoul, Korea
• Session Co-Organizer: ‘Land use and regional land-atmosphere interactions’ session, AAG Annual Meeting, Las Vegas, NV, March 22-27, 2009
• Science Communication Activities – AGU-CIRES Joint Release: ‘Land’s greenness affects monsoon rains’ strength’, AGU Release #08-37.
• Assistant Secretary (1996-97): Korean Geographical Society
• Memberships: Association of American Geographers, American Geophysical Union, American Meteorological Society and Korean Geographical Society