中大气三维化学输运模式的线性化臭氧化学格式的推导

A. Amankwah, K. G. Adanu, B. Sinnhuber, M. Sinnhuber, J. Burrows
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引用次数: 0

摘要

开发了一种简单但计算机有效的参数化臭氧化学,以解释最新的反应速率建议,并完全评估单个催化循环对整个平流层臭氧收支的贡献。本文采用总时间法和速率限制阶跃法两种概念方法,对现有的平流层化学综合模型进行改进,计算线性化臭氧化学方案的系数。总时间法在计算臭氧化学方案的系数时是准确的,而限速步骤法在评估单个催化循环对臭氧收支的贡献时是有效的。以NO2/O为限速步骤的催化循环在海拔15 ~ 48 km范围内非常突出,在海拔30 km处达到峰值,臭氧损失百分比贡献约为75%。HO2/O速率限制步骤在40 km以上占主导地位,在58 km左右达到峰值,对臭氧收支的损失贡献约为90%。在选定的中纬度6月条件下,涉及BrO的速率限制步骤是该集合中臭氧损失反应最少的,并且集中在平流层下部。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Deriving a Linearised Ozone Chemistry Scheme for a 3-D Chemical Transport Model of the Middle Atmosphere
A simple but computer efficient parameterized ozone chemistry is developed to account for up-dates in reaction rate recommendations, and also completely assess the contributions of the indi-vidual catalytic cycles to the ozone budget in the entire stratosphere. Two conceptual ap-proaches, namely total time approach and rate limiting step approach, have been used to im-prove upon an existing comprehensive stratospheric chemistry model to calculate the coefficient of linearised ozone chemistry scheme. The total time approach is accurate in calculating for the coefficients of the ozone chemistry scheme whiles the rate limiting step approach is effective in assessing the contributions of the individual catalytic cycles to the ozone budget. The catalytic cycle with the rate limiting step of NO2/O is very prominent in altitudes between 15 and 48 km, and peaks at 30 km with ozone loss percentage contribution of about 75%. HO2/O rate limiting step dominates above 40 km and peaks around 58 km with about 90% loss contribution to the ozone budget. Rate limiting steps involving BrO were the least ozone loss reactions in the set at the chosen mid-latitude June condition, and they concentrate at the lower stratosphere.
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