雷孝恩,J.S.Chang. 1993. 一个高分辨对流层物质交换模式[J]. 气象学报, 51(1):75-86, doi:10.11676/qxxb1993.008 |
一个高分辨对流层物质交换模式 |
A HIGH RESOLUTION MODEL FOR SPECIES EXCHANGE WITHIN THE TROPOSPHERE |
投稿时间:1991-03-25 修订日期:1991-09-20 |
DOI:10.11676/qxxb1993.008 |
中文关键词: 垂直结构 干沉积速度 数值扩散 |
英文关键词:Vertical structure Dry deposition velocity Nunnerical diffusion |
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中文摘要: |
在区域酸沉积模式(RADM)基础上,设计了一个高分辨对流层(TL)物质交换模式(EM3).EM3在以下五个方面明显不同于RADM:第一,增加行星边界层(PBL)的垂直网格层次;第二、TL内考虑分层的垂直涡旋扩散系数型;第三,使用TL内分层的水平涡旋扩散系数型;第四,采用包含有植物冠层垂直结构影响的新干沉积速度型;第五,使用数值扩散小的二阶矩守恒平流格式.用EM3和RADM对OSCARⅣ实例作对比模拟,结果表明EM3能更好地预测出TL内的三维物质分布规律,在同样条件下,两模式预测的PBL低层中心浓度比值均大于1.8,最大值可大于3. |
英文摘要: |
Based on the regional acid deposition model (RADM), a high resolution model (EM3) for species ezchaage within the troposphere (TL) is dasigaed, EM3 differs considerably in the following 5 aspects from RADM, First, the vertical grid levels in planetary boundary layer (PBL) are increased. Second,layering vertical eddy diffesivity patterns within TL are considered, Thrid, layering horizontal eddy diffusivity patterns within TL are used. Fourth, new dry deposition velocity pattern including the effect of plant canopy layer vertical structure is adopted.Fifth,advective schemes of secondorder moment consei vation with less numerical diffusion is used.OSCAR IY case is comparatively simulated with both EM3 and RADM. The results show that 3-D mass distribution laws whole TL are forecasted by EM3 better than RADM, Under the same conditions,all ratios of the center concentration simulated with both models in lower PBL are more than 1.8. the maximum can be more than 3. |
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