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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >SEASONAL EVOLUTIONS OF N2O, O-3, AND CO2 - THREE-DIMENSIONAL SIMULATIONS OF STRATOSPHERIC CORRELATIONS
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SEASONAL EVOLUTIONS OF N2O, O-3, AND CO2 - THREE-DIMENSIONAL SIMULATIONS OF STRATOSPHERIC CORRELATIONS

机译：N2O，O-3和CO2的季节演变-球面相关性的三维模拟

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Fluctuations in the concentrations of stratospheric trace gases are often correlated over a large range of space and time scales, an observation frequently used to infer the existence of various chemical processes. Three-dimensional models provide a tool to examine the causes and variations of trace gas relationships, because they can realistically simulate the interplay between stratospheric photochemistry and meteorology. Thus such models can aid the interpretation of observed trace gas relationships. We use the general circulation model of the Goddard Institute for Space Studies to simulate the evolution and distribution of N2O, CO2, and O-3 over a year. In the modeled lower stratosphere the constituents N2O and CO2 have well-correlated spatial variations, but the slope of the regression line depends on both the season and the direction of sampling. This departure from a universal form is due both to the annual cycle in tropospheric CO2 and to transport of air from the upper stratosphere photochemically depleted in N2O. Due to the short photochemical Lifetime of tropical O-3, its relationship with N2O is still more varied. In particular, the slope of the O-3-N2O regression line changes significantly from middle to high latitudes, behavior relevant to the use of N2O for estimating the rate of polar winter O-3 depletion. In general, a tight correlation between two trace gases such as N2O and O-3 is Often observed, but this datum cannot be used to infer a similar universal relationship because a different direction of sampling may change the slope and the scatter about it. [References: 39]
机译：平流层痕量气体浓度的波动通常在较大的空间和时间范围内相关，这一观察经常用于推断各种化学过程的存在。三维模型提供了一种检查痕量气体关系的原因和变化的工具，因为它们可以现实地模拟平流层光化学与气象之间的相互作用。因此，这样的模型可以帮助解释观察到的痕量气体关系。我们使用戈达德空间研究所的一般循环模型来模拟N2O，CO2和O-3在一年中的演化和分布。在模拟的低平流层中，N2O和CO2成分具有很好的空间相关性，但是回归线的斜率取决于季节和采样方向。偏离通用形式的原因既是由于对流层CO2的年度循环，又是由于来自上层平流层的空气以光化学方式被N2O消耗了。由于热带O-3的光化学寿命短，它与N2O的关系仍然更加多样。特别是，O-3-N2O回归线的斜率从中纬度到高纬度都有很大变化，这与使用N2O估算冬季极地O-3极地枯竭速度有关。通常，经常会观察到两种痕量气体（例如N2O和O-3）之间的紧密相关性，但是由于采样的方向不同，可能会改变斜率和散布，因此该数据不能用于推断相似的通用关系。 [参考：39]

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