• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >PHOTODISSOCIATION PARAMETERIZATION FOR STRATOSPHERIC PHOTOCHEMICAL MODELING
【24h】

PHOTODISSOCIATION PARAMETERIZATION FOR STRATOSPHERIC PHOTOCHEMICAL MODELING

机译：光球化学模型的光解离参数化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A new technique is described for calculating molecular photodissociation rates using a novel empirical formulation. This technique is shown to be applicable for stratospheric photochemical modeling and atmospheric photochemical systems in general. The two basic independent variables that control photodissociation rates in the atmosphere are the column abundances of ozone and molecular oxygen; these are the main absorbers that control solar ultraviolet radiation in the atmosphere. Hence they are the key variables used to parameterize photodissociation processes. In this approach, the spectral integrals normally associated with photodissociation rate calculations are eliminated by substituting for the integrals empirical functions that depend only on the column abundances of O-2 and O-3. The particular empirical functions adopted here related to the curve of growth for the transmission of radiation through absorbing media, particularly through spectrally highly structured absorbers. The simple expressions that we derived can be applied to calculate photodissociation rates at most solar zenith angles for a wide variety of molecular species, including O-2, O-3, NO2, HO2, H2O, H2O2, N2O5, HNO3, N2O, HNO2, CO2, CH2O, SO2, OCS, HCl, CF2Cl2, CFCl3, CCl4, CH3Cl, ClO, ClO2, OClO, ClONO2, HOCl, CH3Br, BrNO3, and CH4O2. The accuracy and applicability of the empirical formulas, corrections for radiation scattering effects, variations in the solar ultraviolet spectrum, and temperature variations, are discussed. [References: 41]
机译：描述了使用新的经验公式计算分子光解离速率的新技术。证明该技术通常适用于平流层光化学建模和大气光化学系统。控制大气中光解离速率的两个基本自变量是臭氧和分子氧的色谱柱丰度。这些是控制大气中太阳紫外线辐射的主要吸收剂。因此，它们是用于参数化光解离过程的关键变量。在这种方法中，通过代之以仅依赖于O-2和O-3列丰度的积分经验函数，可以消除通常与光解离速率计算相关的光谱积分。此处采用的特定经验函数与通过吸收介质（尤其是通过光谱高度结构化的吸收器）传输辐射的增长曲线有关。我们导出的简单表达式可以用于计算各种分子种类（包括O-2，O-3，NO2，HO2，H2O，H2O2，N2O5，HNO3，N2O，HNO2）在大多数太阳天顶角下的光解离速率，CO2，CH2O，SO2，OCS，HCl，CF2Cl2，CFCl3，CCl4，CH3Cl，ClO，ClO2，OClO，ClONO2，HOCl，CH3Br，BrNO3和CH4O2。讨论了经验公式的准确性和适用性，辐射散射效应的校正，太阳紫外线光谱的变化以及温度的变化。 [参考：41]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号