Simulation and validation of Arctic radiation and clouds in a regional climate model
Simulation and validation of Arctic radiation and clouds in a regional climate model
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区域气候模型中北极辐射和云的模拟和验证
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
B. Machenhauer
中科院分区：
文献类型：
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作者：
A. Rinke;K. Dethloff;J. Christensen;M. Botzet;B. Machenhauer
用一个区域大气气候模式模拟了北纬65度以北、水平分辨率为50公里的1990年1月和7月的北极气候。给出了用ECHAM3参数化得到的地面辐射平衡和云的月平均分量，并与资料进行了比较。该模式高估了全球辐射，高估了1月份的云量，低估了7月份的云量。高分辨率的模拟显示了由于地区不同的地表温度、云层、地表反照率和积雪深度而产生的许多区域细节。通过使用改进的ECHAM4参数，可以减少模型模拟中的偏差。ECHAM4辐射参数化的使用明显改善了结果，这是因为它更好地描述了大气吸收。给出了不同云参数下的灵敏度实验。
A regional atmospheric climate model has been applied to simulate the Arctic climate north of 65N at a 50 kmhorizontal resolution for January and July 1990. The monthly mean components of the surface radiative balanceand clouds using ECHAM3 parameterization have been described and compared with data. The modeloverestimates the global radiation, overestimates clouds during January and underestimates clouds during July.The high resolution simulations show many regional details due to regional different surface temperatures, clouds, surface albedo and snow depths. The bias in the model simulation can be reduced by using the improvedECHAM4 parameterization. The use of the ECHAM4 radiation parameterization clearly improves the results,owing the better description of atmospheric absorption. Sensitivity expe-riments with different cloud parametershave been described.