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박두선,박태원,홍진기 한국기상학회 2022 Asia-Pacific Journal of Atmospheric Sciences Vol.58 No.4
This study examines the systematic surface temperature biases over the Arctic Ocean in the eight Coupled Model IntercomparisonProject 5 (CMIP5) models (BCC-CSM1-1, CESM1-CAM5-1-FV2, GFDL-CM3, GISS-E2-H, IPSL-CM5A-LR,MIROC-ESM-CHEM, MIP-EMS-LR, and NorESM1-M) and investigates the quantitative attribution of feedback processesthat are responsible. In general, the cold biases are predominant over the entire Arctic Ocean in the CMIP5 models. Thesesystematic temperature biases are decomposed into the biases by physical and dynamical processes, based upon the ClimateFeedback-Responses Analysis Method (CFRAM). The multi-model ensemble mean shows that dynamical processes aremore important in the Pacific sector of the Arctic, while physical ones are more important in the Atlantic sector, althoughthis feature is not consistently found in all models. Dynamical processes involve surface heat fluxes, and frictional, turbulent,convective, horizontal heat transports, etc., which cannot be decomposed further by the method used. In contrast, the physicalprocesses can be further decomposed into cloud, water vapor, and albedo feedbacks. According to our results, most ofthe physical processes are attributable to the albedo feedback in all models. Cold (warm) biases due to the albedo feedbackalmost correspond to the positive (negative) biases of sea ice concentration. Hence, our results suggest that for better simulationof the Arctic surface temperature, it tells us which part of the model processes we should efficiently focus on improving.
Faujasite 제올라이트의 CO2 흡착에 대한 양자화학적 연구
박두선,이종렬,김종택 ( Doo Seon Park,Jong Ryul Lee,Jong Taik Kim ) 한국화학공학회 1989 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.27 No.5
The CNDO/2 method was used to study the interaction of CO₂ molecules with the cations situated in the S_Ⅱ site of faujasite zeolites which have various Si/Al ratios. It was found that correlation between the electrostatic field strength of exchanged cations in the zeolites and interacting CO₂ molecules. The strength of interaction between them has the following order: Mg^(2+)> Ca^(2+)> Li^+ >Na^+. When plotting the calculated C-O bond orders of CO₂ interacting with the cations and the asymmetric stretching vibrational frequencies of corresponding CO₂, quite good correlation was obtained.