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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >AN EVALUATION OF DEEP CONVECTIVE MIXING IN THE GODDARD CHEMICAL TRANSPORT MODEL USING INTERNATIONAL SATELLITE CLOUD CLIMATOLOGY PROJECT CLOUD PARAMETERS
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AN EVALUATION OF DEEP CONVECTIVE MIXING IN THE GODDARD CHEMICAL TRANSPORT MODEL USING INTERNATIONAL SATELLITE CLOUD CLIMATOLOGY PROJECT CLOUD PARAMETERS

机译：基于国际卫星云气候学项目云参数的深度化学对流模型中深对流混合评价

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The simulation of deep convective mixing in the Goddard Chemical Transport Model (GCTM) is evaluated by comparing 1990-1992 distributions of upper tropospheric convective mass flux and cloud top pressure from the Goddard Earth Observing System data assimilation system (GEOS-1 DAS) with deep convective cloud fields from the International Satellite Cloud Climatology Project (ISCCP). Deep convective mixing in the GCTM is calculated using convective information from the GEOS-1 DAS. Therefore errors introduced when deep convection is parameterized in the GEOS-1 DAS affect the distribution of trace gases in the GCTM. The location of deep convective: mixing in the tropics is fairly well simulated, although its north-south extent is overestimated by >5 degrees. The frequency of deep convective mixing also appears to be overestimated in the tropics, resulting in GCTM-calculated upper tropospheric concentrations of carbon monoxide in the tropics that are larger and less variable than those observed. The spatial extent of deep convective mixing in the subtropics is overestimated at several locations including the Caribbean throughout the year and the South Pacific Convergence Zone during June-August. The extent of deep convection is underestimated over midlatitude marine storm tracks. DAS-calculated cloud top pressures differ from ISCCP cloud top pressures by less than one-half a GCTM layer (35 hPa) at most longitudes in the tropics; however, cloud top pressures are overestimated by more than 35 hPa (i.e., the vertical extent of deep convection is underestimated) over wintertime midlatitude storm tracks and the Indian Ocean and underestimated by more than 35 hPa at locations that include the Gulf of Mexico during December-February and central South America during June-August. [References: 22]
机译：通过将1990-1992年戈达德地球观测系统数据同化系统（GEOS-1 DAS）的高对流层对流质量通量和云顶压力的分布与深对流进行比较，评估了戈达德化学输运模型（GCTM）中的深对流混合模拟。国际卫星云气候学项目（ISCCP）的对流云场。使用来自GEOS-1 DAS的对流信息来计算GCTM中的深对流混合。因此，在GEOS-1 DAS中对深度对流进行参数设置时引入的误差会影响GCTM中痕量气体的分布。深对流的位置在热带地区被很好地模拟，尽管其南北方向被高估了> 5度。深对流混合的频率在热带地区似乎也被高估了，导致热带地区利用GCTM计算的对流层中一氧化碳的较高浓度比所观测到的高，低。亚热带地区深对流混合的空间范围被高估了一些地点，包括全年的加勒比海地区和六月至八月的南太平洋收敛带。在中纬度海洋风暴轨道上，深对流的程度被低估了。 DAS计算得出的云顶压力与ISCCP云顶压力在热带大多数经度上的GCTM层（35 hPa）不到一半。但是，在冬季中纬度暴风道和印度洋上，云顶压力被高估了35 hPa以上（即，低深度对流的垂直范围被低估了），而在12月包括墨西哥湾在内的地区，云顶压力被低估了35 hPa以上。 -2月至6月和8月中南美洲中部。 [参考：22]

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