Geophysical Insititute, University of Alaska Fairbanks
An observational and numerical study on sea fog formation off the west coast of the Korean Peninsula advised by Prof. Seong Soo Yum
Post-doc, Global Environmental Laboratory, Yonsei University, Seoul, Korea (2011.8 ~ 2012.3)
I have studied the weather modification and aerosol effects on the evolution of stratus cloud using observation data and numerical modeling in my Master course. Cloud microphysical data such as cloud droplet number concentration, CCN number concentration are measured by FSSP and CCN counter in our research field to study the evolution of cloud system. Korea is adjacent to China so that aerosol characteristics are affected by the aerosol or Asian dust from the Chinese continent. To understand how cloud system and further climate relevant to cloud lifetime are dependent on the aerosol, I have studied it and extended it to my Ph.D. course.
In my course for Ph. D., I’m studying the formation of sea fog over the Yellow Sea using observation data and numerical simulation. Finally, I attempted to find out the effect of aerosol on the formation of sea fog. I study the fog formation mechanism in the telescopic view from large scale to microphysical scale. First of all, I examined the synoptic and local meteorological characteristics related to the formation of sea fog and then summarize the results: Sea fog can form due to the decrease of air temperature (T) and the increase of dew point temperature (Td) in summer season. This meteorological characteristic is similar to that of typical advection fog. As a further study of it, I focused on the relative contribution of turbulence, advection and radiation on the tendency of T and Td.
I am interested in the feature of turbulent effect on the cloud evolution within marine boundary layer. I defined the marine boundary layer characteristics and then the cooling rate and moistening rate are analyzed with the turbulent heat flux and moisture flux calculated by the method of bulk aerodynamic equation. There are full instrument installed in your experiment site so that radiative and turbulent characteristics as well as aerosol characteristics are fully analyzed. I think that these observation data should be analyzed by the researchers who have experienced the study on boundary layer characteristics, which are related to fog formation.
I used WRF and PArameterized FOG (PAFOG) model. PAFOG model is well-known to study the radiation fog. I coupled PAFOG with WRF to identify the contribution of turbulence, advection and radiation on the sea fog formation. I have employed the LES model, which is developed by Prof. Kogan in the University of Oklahoma, U.S.A.