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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >DISTRIBUTION AND BUDGET OF O-3 IN THE TROPOSPHERE CALCULATED WITH A CHEMISTRY GENERAL CIRCULATION MODEL
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DISTRIBUTION AND BUDGET OF O-3 IN THE TROPOSPHERE CALCULATED WITH A CHEMISTRY GENERAL CIRCULATION MODEL

机译：化学一般循环模型计算的对流层中O-3的分布和收支

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We present results of global tropospheric chemistry simulations with the coupled chemistry/atmospheric general circulation model ECHAM. Ultimately, the model will be used to study climate changes induced by anthropogenic influences on the chemistry of the atmosphere; meteorological parameters that are important for the chemistry, such as temperature, humidity, air motions, cloud and lain characteristics, and mixing processes are calculated on-line. The chemical part of the model describes background tropospheric CH4-CO-NOx-HOx photochemistry. Emissions of NO and CO, surface concentrations of CH4, and stratospheric concentrations of O-3 and NOy are prescribed as boundary conditions. Calculations of the tropospheric O-3 budget indicate that seasonal variabilities of the photochemical production and of injection from the stratosphere are represented realistically, although some aspects of the model still need improvement. Comparisons of calculated O-3 surface concentrations and O-3 profiles with available measurements show that the model reproduces O-3 distributions in remote tropical and midlatitudinal sites. Also, the model matches typical profiles connected with deep convection in the Intertropical Convergence Zone (ITCZ). However, the model tends to underestimate O-3 concentrations at the poles and in relatively polluted regions. These underestimates are caused by the poor representation of tropopause foldings in midlatitudes, which form a significant source of tropospheric O-3 from the stratosphere, too weak transport to the poles, and the neglect of higher hydrocarbon chemistry. Also, mixing of polluted continental boundary layer air into the free troposphere may be underestimated. We discuss how these model deficiencies will be improved in the future. [References: 60]
机译：我们用耦合的化学/大气总环流模型ECHAM来表示全球对流层化学模拟的结果。最终，该模型将用于研究人为因素对大气化学的影响引起的气候变化;在线计算对化学重要的气象参数，例如温度，湿度，空气运动，云和层的特性以及混合过程。该模型的化学部分描述了对流层背景CH4-CO-NOx-HOx光化学。 NO和CO的排放，CH4的表面浓度以及O-3和NOy的平流层浓度规定为边界条件。对流层O-3预算的计算表明，平流层的光化学生产和注入的季节变化可以真实表示，尽管该模型的某些方面仍需要改进。计算出的O-3表面浓度和O-3剖面与可用测量值的比较表明，该模型再现了偏远热带和中纬度地区的O-3分布。此外，该模型与在热带收敛带（ITCZ）中与深对流有关的典型剖面相匹配。但是，该模型倾向于低估两极和相对污染区域的O-3浓度。这些低估是由于中纬度对流层顶褶皱的代表性较差所致，这形成了来自平流层的对流层O-3的重要来源，向两极的迁移太弱以及对更高碳氢化合物化学的忽视。同样，被污染的大陆边界层空气混合到自由对流层中可能会被低估。我们讨论了将来如何改善这些模型缺陷。 [参考：60]

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