| Cloud and Radiation Processes Simulated by a Coupled Atmosphere-Ocean Model |
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| 作者姓名： | WANG Fang DING Yihui XU Ying |
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| 作者单位： | Laboratory for Climate Studies of Chinese Meteorological Administration National Climate Center，Laboratory for Climate Studies of Chinese Meteorological Administration，National Climate Center，Laboratory for Climate Studies of Chinese Meteorological Administration，National Climate Center，Beijing 100081，Beijing 100081，Beijing 100081 |
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| 摘 要： | Using NCC/IAP T63 coupled atmosphere-ocean general circulation model (AOGCM),two 20-yr integra- tions were processed,and their ability to simulate cloud and radiation was analysed in detail.The results show that the model can simulate the basic distribution of cloud cover,and however,obvious differences still exist compared with ISCCP satellite data and ERA reanalysis data.The simulated cloud cover is less in general,especially the abnormal low values in some regions of ocean.By improving the cloud cover scheme, simulated cloud cover in the eastern Pacific and Atlantic,summer hemisphere's oceans from subtropical to mid-latitude is considerably improved.But in the tropical Indian Ocean and West Pacific the cloud cover difference is still evident,mainly due to the deficiency of high cloud simulation in these regions resulting from deep cumulus convection.In terms of the analysis on radiation and cloud radiative forcing,we find that simulation on long wave radiation is better than short wave radiation.The simulation error of short wave radiation is caused mostly by the simulation difference in short wave radiative forcing,sea ice,and snow cover,and also by not involving aerosol's effect.The simulation error of long wave radiation is mainly resulting from deficiency in simulating cloud cover and underlying surface temperature.Corresponding to improvement of cloud cover,the simulated radiation (especially short wave radiation) in eastern oceans, summer hemisphere's oceans from subtropical to mid-latitude is remarkably improved.This also brings obvious improvement to net radiation in these regions.
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| 关 键 词： | 大气-海洋大气环流模型 云 辐射 过程模拟 |
| 收稿时间： | 2007/10/22 0:00:00 |
Cloud and Radiation Processes Simulated by a Coupled Atmosphere-Ocean Model |
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| WANG Fang,DING Yihui,XU Ying.Cloud and Radiation Processes Simulated by a Coupled Atmosphere-Ocean Model[J].Acta Meteorologica Sinica,2007,21(4):397-408. |
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| Authors: | WANG Fang DING Yihui XU Ying |
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| Institution: | Laboratory for Climate Studies of Chinese Meteorological Administration, National Climate Center, Beijing 100081 |
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| Abstract: | Using NCC/IAP T63 coupled atmosphere-ocean general circulation model (AOGCM),two 20-yr integra- tions were processed,and their ability to simulate cloud and radiation was analysed in detail.The results show that the model can simulate the basic distribution of cloud cover,and however,obvious differences still exist compared with ISCCP satellite data and ERA reanalysis data.The simulated cloud cover is less in general,especially the abnormal low values in some regions of ocean.By improving the cloud cover scheme, simulated cloud cover in the eastern Pacific and Atlantic,summer hemisphere's oceans from subtropical to mid-latitude is considerably improved.But in the tropical Indian Ocean and West Pacific the cloud cover difference is still evident,mainly due to the deficiency of high cloud simulation in these regions resulting from deep cumulus convection.In terms of the analysis on radiation and cloud radiative forcing,we find that simulation on long wave radiation is better than short wave radiation.The simulation error of short wave radiation is caused mostly by the simulation difference in short wave radiative forcing,sea ice,and snow cover,and also by not involving aerosol's effect.The simulation error of long wave radiation is mainly resulting from deficiency in simulating cloud cover and underlying surface temperature.Corresponding to improvement of cloud cover,the simulated radiation (especially short wave radiation) in eastern oceans, summer hemisphere's oceans from subtropical to mid-latitude is remarkably improved.This also brings obvious improvement to net radiation in these regions. |
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| Keywords: | AOGCM cloud and radiation cloud radiative forcing cloud cover scheme |
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