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자료유형
학술저널
저자정보
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한국기상학회 Asia-Pacific Journal of Atmospheric Sciences 한국기상학회지 제41권 제6호
발행연도
2005.12
수록면
1,029 - 1,048 (20page)

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The climatic impact on atmospheric general circulation model (AGCM) is studied for different ice crystals in cirrus cloud. Major objective of this study is to estimate the quantitative climate responds to different shortwave optical properties of various ice crystal habits in the AGCM. For the purpose, we perform three numerical experiments: 1) experiment that cirrus clouds consist of only plate(Plate), 2) experiment that cirrus clouds consist of only bullet(Bullet), and 3) experiment that cirrus clouds consist of mixture of various ice crystal habits(Mixture). Energy fluxes constituting the global energy budget simulated in Bullet and Mixture are compared to those simulated in Plate. And also, we analyze the differences of the fluxes in relevant to their effects on the large-scale patterns of temperature and circulation. It is noted that the magnitudes of direct shortwave radiative effects are generally larger than those of indirect longwave radiative effects. And seasonality of the effects is quite different with energy components. Meanwhile, effects on the surface latent heat flux, which is also one of the indirect responses, are comparable to the direct radiative effects. We emphasize that inter-experimental differences in radiative fluxes are consistent with the systematic differences in the large-scale patterns of temperature and zonal circulation. In context of the global and annual average, as an example, because cirrus clouds with Plate crystals has smaller scattering or reflecting effect on the solar radiation than those with Mixture, the temperature difference for the overall earth-atmosphere system between Mixture and Plate has negative value. In addition, we find that distinct shortwave radiative properties of ice particles in cirrus clouds can regionally lead to difference of surface temperature of ±2~3℃ and difference of zonal mean flow of ±1 ㎳?¹.

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