Impact of Accurate Photolysis Calculations on the Simulation of Stratospheric Chemistry
Impact of Accurate Photolysis Calculations on the Simulation of Stratospheric Chemistry
复制标题
准确的光解计算对平流层化学模拟的影响
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
J. Burrows
中科院分区：
文献类型：
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作者：
J. Trentmann;H. Bovensmann;V. Eyring;R. Müller;J. Burrows
解释大气测量结果和预测大气成分需要一套精确的化学传输和全球环流模型。本文介绍了利用不来梅大气光化学模式（BRAPHO）进行的研究结果。本研究的重点是大气光解频率的计算。结果表明，光谱高分辨率模拟的O2舒曼-龙格带导致的差异在10%的顺序计算的O2光解频率相比，在其他大气模型中使用的参数化。NO吸收的详细治疗导致甚至更大的差异（在50%的顺序）相比，标准参数化。折射导致大太阳天顶角处的光解频率显着增加，并且在极地春季条件下，导致某些微量气体的夜间混合比显着变化，例如，NO3。看来，最近的一些重要的速率常数的变化显着改变模拟的BrOx和HOx预算中纬度平流层。
The interpretation of atmospheric measurements and the forecasting of the atmospheric composition require a hierarchy of accurate chemical transport and global circulation models. Here, the results of studies using Bremens Atmospheric Photochemical Model (BRAPHO) are presented. The focus of this study is given to the calculation of the atmospheric photolysis frequencies It is shown that the spectral high resolved simulation of the O2 Schumann–Runge bands leads to differences in the order of 10% in the calculated O2 photolysis frequency when compared with parameterizations used in other atmospheric models. Detailed treatment of the NO absorption leads to even larger differences (in the order of 50%) compared to standard parameterizations. Refraction leads to a significant increase in the photolysis frequencies at large solar zenith angles and, under polar spring conditions, to a significant change in the nighttime mixing ratio of some trace gases, e.g., NO3. It appears that recent changes in some important rate constants significantly alter the simulated BrOx- and HOx-budgets in the mid-latitude stratosphere.