Simulation of ozone and other chemical species using a Center for Climate System Research/National Institute for Environmental Studies atmospheric GCM with coupled stratospheric chemistry
Simulation of ozone and other chemical species using a Center for Climate System Research/National Institute for Environmental Studies atmospheric GCM with coupled stratospheric chemistry
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使用气候系统研究中心/国家环境研究所大气 GCM 与平流层化学耦合模拟臭氧和其他化学物质
DOI：
10.1029/1998jd100105
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发表时间：
1999
影响因子：
--
通讯作者：
H. Akiyoshi
中科院分区：
文献类型：
--
作者：
M. Takigawa;M. Takahashi;H. Akiyoshi
建立了一个新的中层大气环流模型，其中包括臭氧和其他化学物质的光化学（19 个光解和 52 个化学反应）。水平光谱分辨率为T21（水平网格间距约600公里），垂直30层。介绍了 10 多年模型集成的初步结果。 N2O等长寿物种的分布与气候学意义上的卫星观测非常相似，尽管模型平流层中没有很好地模拟纬度30°附近的急剧经向梯度。春分期间出现的双峰结构也没有得到很好的再现。这一结果与该模型中半年振荡西风相较弱的事实是一致的。这可能是由于模型的分辨率较粗造成的。尽管该模型稍微低估了热带臭氧总量，但臭氧柱丰度的季节性演变是相当现实的。该模型还低估了赤道对流层顶周围的臭氧量。 2月中纬度模型平流层上层OH数密度约为1.8×107 cm−3，略小于观测值。短寿命物种（例如 NO）的水平分布表明了合理的昼夜变化模型。该模型在北半球冬季低平流层的冷偏差约为 25 K，在南半球冬季的冷偏差约为 5 K。北半球冬季赤道低平流层的模式剩余平均垂直速度较观测值（约0.4毫米/秒）偏弱（约0.1毫米/秒），而赤道对流层顶周围的模式温度则较观测值低。
A new middle-atmosphere general circulation model that includes the photochemistry for ozone and other chemical species (19 photolysis and 52 chemical reactions) has been constructed. The horizontal spectral resolution is T21 (about a 600 km horizontal grid spacing) with 30 layers in the vertical. Preliminary results from over 10 years of model integration are presented. The distributions of long-lived species, such as N2O, are rather similar to those of satellite observations in a climatological sense, although the sharp meridional gradient around 30° latitude is not well simulated in the model stratosphere. Neither is the double peak structure that occurs during equinox periods well reproduced. This result is consistent with the fact that the westerly phase of the semiannual oscillation is weak in this model. This may be due to the coarse resolution of the model. The seasonal evolution of the ozone column abundance is quite realistic, although the model slightly underestimates total tropical ozone. The model also underestimates ozone amounts around the equatorial tropopause. The February midlatitude number density of OH in the model upper stratosphere is about 1.8 × 107 cm−3, which is slightly less than that observed. The horizontal distributions of short-lived species, such as NO, suggest a reasonable model diurnal variation. The model has a cold bias of about 25 K in the lower stratospheric Northern Hemisphere winter and 5 K in the Southern Hemisphere winter. The model residual mean vertical velocity in the equatorial lower stratosphere is too weak (about 0.1 mm/s) during the Northern Hemisphere winter, compared with the observed (about 0.4 mm/s), while the model temperature around the equatorial tropopause is cooler than that observed.