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A new calculation of chemical eddy transport for several middle atmospheric tracers

机译：几种中层大气示踪剂化学涡流传输的新计算

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We describe a new approach to calculating transport of chemically active tracers by nonbreaking planetary waves (chemical eddy transport). This approach uses the horizontal displacements calculated from a planetary wave model to estimate the time variation of the photolysis rates experienced at each grid point. Me contrast our method with a previously documented approach that assumes linear photochemical relaxation and calculates separate diffusion coefficients for each species. Our results are presented for five middle atmospheric tracers: O-3, NO2, NO, CO, and H-2. For O-3, greater transport into the polar region is seen around 30 km, For mesospheric NO, the increased exposure of polar air to UV sunlight leads to more photodissociation and thus less net downward transport into the stratosphere. Mesospheric CO and H-2 are less sensitive to chemical eddy transport because their chemical lifetimes are longer. [References: 28]
机译：我们描述了一种通过不间断行星波计算化学活性示踪剂传输的新方法（化学涡流传输）。这种方法使用从行星波模型计算出的水平位移来估计每个网格点处经历的光解速率的时间变化。我将我们的方法与先前记录的方法进行了对比，该方法假定线性光化学弛豫并计算每个物种的单独扩散系数。我们的结果针对五个中层大气示踪剂：O-3，NO2，NO，CO和H-2进行了介绍。对于O-3，在30 km附近可以看到更多的进入极区的运动。对于中层NO，极地空气暴露于UV阳光下会导致更多的光解离，从而减少了向平流层的净向下运输。中层CO和H-2对化学涡流的传输较不敏感，因为它们的化学寿命更长。 [参考：28]

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