A two‐dimensional mean circulation model for the atmosphere below 80km
A two‐dimensional mean circulation model for the atmosphere below 80km
复制标题
80km以下大气二维平均环流模型
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
J. Pyle
中科院分区：
文献类型：
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作者：
R. Harwood;J. Pyle
本文阐述了一个数值模式的详细公式，该模式的目的是研究平流层和中间层中动力学、光化学和辐射的相互作用。两个集成的模式为900天的描述，其中许多功能的大气重现，但具有重要的差异的细节。
因变量是相关气象量的纬向平均值，作为时间、纬度和高度（对数气压）的函数，纬度分辨率为μ/19，气压高度分辨率为0.5。
热和物质的涡通量处理的大尺度扩散系数。这种处理方法不适用于动量通量：动量通量目前主要由雨云5号航天器上的选择性斩波器辐射计进行的观测确定。
由于CO2和O3排放的辐射冷却计算从简化的表达式，这基本上是冷却空间近似与发射率通过曲线拟合对更精细的处理的结果。臭氧对太阳辐射的吸收是从吸收量与穿过臭氧量的关系表中得出的。对流层中的辐射和潜热释放在气候学上是特定的。
这里描述的积分中的光化学是经典的臭氧方案，但是，为了调查可能的平流层污染问题，积分已经进行了包括涉及氮和氢化合物的反应。这些将在以后的论文中描述。
The paper sets out the detailed formulation of a numerical model whose purpose is the study of the interactions of dynamics, photochemistry and radiation in the stratosphere and mesosphere. Two integrations of the model for 900 days are described in which many features of the atmosphere are reproduced but with important differences of detail.
The dependent variables are zonal means of the relevant meteorological quantities, held as functions of time, latitude and height (log pressure) with a resolution of μ/19 in latitude and 0.5 in pressure scale height.
Eddy fluxes of heat and matter are treated by large-scale diffusion coefficients. This treatment is not applicable to momentum fluxes: these are currently specified from observations made mainly from the selective chopper radiometer on the Nimbus V spacecraft.
Radiative coolings due to CO2 and O3 emission are computed from simplified expressions which are essentially cooling-to-space approximations with emissivities obtained by curve-fitting against the results of more elaborate treatments. Absorption of solar radiation by ozone is obtained from tabulations of absorption against ozone amount traversed. Radiation and latent heat release in the troposphere are specified climatologically.
The photochemistry in the integrations described here is the classical ozone scheme but, with a view to investigating possible stratospheric pollution problems, integrations have been performed with the inclusion of reactions involving nitrogen and hydrogen compounds. These will be described in a later paper.