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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Use of on-line tracers as a diagnostic tool in general circulation model development 2. Transport between the troposphere and stratosphere
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Use of on-line tracers as a diagnostic tool in general circulation model development 2. Transport between the troposphere and stratosphere

机译：使用在线示踪剂作为一般环流模型开发中的诊断工具2.对流层与平流层之间的运输

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摘要

The effect of altering the vertical resolution of a general circulation model and processes associated with it are used to investigate mixing between the troposphere and stratosphere. Four on-line tracers are employed: chlorofluorocarbon-11 and SF_6 for mixing from the troposphere into the stratosphere, Rn~(222) for vertical mixing within the troposphere, and ~(14)C for mixing from the stratosphere into the troposphere. Four standard models are tested, with varying vertical resolution, gravity wave drag, and location of the model top, and additional subsidiary models are employed to examine specific features. The results show that proper vertical transport between the troposphere and stratosphere in the Goddard Institute for Space Studies models requires lifting the top of the model considerably out of the stratosphere and including gravity wave drag in the lower stratosphere. Increased vertical resolution without these aspects does not improve tropospheric-stratospheric exchange. The transport appears to be driven largely by the residual circulation within the stratosphere; associated Eliassen-Palm flux convergences require both realistic upward propagating energy from the troposphere and realistic pass-through possibilities. A 23-layer version with a top at the mesopause and incorporating gravity wave drag appears to have reasonable stratospheric-tropospheric exchange in terms of both the resulting tracer distributions and atmospheric mass fluxes.
机译：改变一般环流模型的垂直分辨率及其相关过程的影响用于研究对流层与平流层之间的混合。使用了四个在线示踪剂：氯氟烃11和SF_6用于从对流层混合到平流层中，Rn〜（222）用于在对流层中垂直混合，而〜（14）C用于从对流层中混合到对流层中。测试了四个标准模型，这些模型具有不同的垂直分辨率，重力波阻力和模型顶部的位置，并且使用了其他辅助模型来检查特定功能。结果表明，戈达德空间研究所的对流层和平流层之间的适当垂直传输要求将模型的顶部显着抬离平流层，并在低平流层中包括重力波阻力。没有这些方面的增加的垂直分辨率不会改善对流层-平流层交换。平流层内部的残余循环似乎在很大程度上推动了这种运输。相关的Eliassen-Palm通量收敛需要对流层中的实际向上传播能量和实际通过的可能性。从最终的示踪剂分布和大气质量通量两方面来看，一个23层的中层顶顶部并结合了重力波阻力似乎具有合理的平流层-对流层交换。

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