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首页> 外文期刊>Journal of the Atmospheric Sciences >Lamination frequencies as a diagnostic for horizontal mixing in a 3D transport model
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Lamination frequencies as a diagnostic for horizontal mixing in a 3D transport model

机译：层压频率可作为3D传输模型中水平混合的诊断

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Ozone simulations are performed in an attempt to simulate laminar events with the frequency observed in balloon ozone sondes. The winds are taken from the Goddard Earth Observing System Data Assimilation System (GEOS DAS); the importance of horizontal and vertical resolution to production of lamina are investigated, A simulation with a high horizontal reolution (grid spacing 1 degrees latitude by 1.25 degrees longitude) and high vertical resolution (similar to 300 m grid spacing) isentropic model produces lamination frequencies close to the balloon sonde climatology near the polar vortex edge but exhibits too much lamination in the subtropics. This indicates that the GEOS DAS winds contain the information to produce laminar events, although such small-scale features are not manifest in the more commonly used 2 degrees latitude by 2.5 degrees longitude transport model, which uses the hybrid sigma-pressure vertical coordinate. The zonal average ozone tendencies due to horizontal mixing in the lamina-producing models are similar to the tendencies in coarser resolution models that show no lamination, suggesting that it is not necessary to resolve laminar events to maintain a realistic ozone budget. The comparison of the modeled lamination frequency with the balloon sonde climatology indicates that the model horizontal mixing at the vortex edge is accurate but in the subtropics the mixing is excessive. [References: 30]
机译：进行臭氧模拟以试图模拟层流事件，并以气球臭氧探测仪中观察到的频率进行模拟。风来自戈达德地球观测系统数据同化系统（GEOS DAS）;研究了水平和垂直分辨率对薄片生产的重要性，在高水平分辨率（网格间距为1纬度乘以1.25度经度）和高垂直分辨率（近似于300 m网格间距）的等熵模型中，产生的贴合频率接近极涡边缘附近的气球探测气候，但在亚热带地区表现出太多的叠层。这表明，GEOS DAS风包含产生层流事件的信息，尽管在使用混合sigma-pressure垂直坐标的更常用的2度乘以2.5度的经度传输模型中没有显示出这样的小尺度特征。产生层板的模型中由于水平混合而产生的纬向平均臭氧趋势类似于没有分层的较粗分辨率模型中的趋势，这表明不必解决层流事件以维持实际的臭氧预算。将模型化的层合频率与球囊探空仪的气候学进行比较表明，在涡旋边缘的模型水平混合是准确的，但在亚热带，混合是过度的。 [参考：30]

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