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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >IMPACT OF AVERAGED PHOTOLYSIS RATES CHEMICAL MODELS
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IMPACT OF AVERAGED PHOTOLYSIS RATES CHEMICAL MODELS

机译：平均光解速率对化学模型的影响

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An evaluation is made of the effect of two approximations to the diurnal variation of photolysis rates on the simulation of stratospheric chemistry. The daylight average approximation uses photolysis rates that are given a value representative of the daylight average over that portion of the day that the Sun is shining, and zero otherwise. Although this distorts the diurnal cycle, the zonal average concentrations using this approximation are within about 5% of those from the fully resolved diurnal cycle for most of the important species in the stratosphere. Larger discrepancies occur in the partitioning of inorganic chlorine, although even this is in error by only about 10% for the dominant species. The 24-hour average photolysis approximation gives perpetual daylight except in the polar night. The error associated with this is quite large, especially for those species such as NO3 and N2O5 that are produced during night. Over an integration time of a month, it can lead to differences in the simulated concentrations of major species such as ozone of the order of 20% or more. [References: 18]
机译：对平流层化学模拟中光解速率日变化的两个近似值的影响进行了评估。日光平均近似值使用光解速率，该光解速率的值表示太阳在一天中该部分的日光平均值，否则为零。尽管这会扭曲昼夜周期，但对于平流层中大多数重要物种而言，使用这种近似方法得出的纬向平均浓度约为完全解析的昼夜周期浓度的5％。无机氯的分配存在较大差异，尽管对于主要物种而言，即使误差仅为10％左右。除极夜外，平均24小时的光解近似值可提供永久的日光。与之相关的误差非常大，尤其是对于夜间产生的那些物种，例如NO3和N2O5。在一个月的积分时间内，它可能导致主要物种（如臭氧）的模拟浓度差异达到20％或更高。 [参考：18]

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