On the contribution of chemical oscillations to ozone depletion events in the polar spring

On the contribution of chemical oscillations to ozone depletion events in the polar spring
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化学振荡对极地泉臭氧消耗事件的贡献

DOI:
10.5194/acp-19-10161-2019
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发表时间:
2019-08
影响因子:
6.3
通讯作者:
Gutheil Eva
Gutheil Eva
中科院分区:
地球科学1区
文献类型:
--
作者:
Herrmann Maximilian;Cao Le;Sihler Holger;Platt Ulrich;Gutheil Eva

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抽象的。本文利用进一步发展的一维反应动力学分析方法,对对流层臭氧消耗事件(ODES)的振荡(或重现)进行了数值研究 力学与输运(KINAL-T)化学输运模型。活性溴是ODES的主要贡献者。 在ODE终止后,空气中的反应性溴被沉积到气溶胶或雪面上,臭氧可以通过NOx催化的光化学或通过从自由对流层到边界层的湍流输送而再生。 然后,补充的臭氧可用于下一轮自动催化的溴释放(溴爆炸),从而导致另一首颂歌。 纯化学驱动的振荡周期为5 d,扩散驱动的振荡周期为30 d。 常微子振荡发生的一个重要条件是有一个足够强的逆温层。 在参数研究中,研究了振荡周期与氮氧化物浓度、逆温层强度、环境温度、气溶胶密度和太阳辐射的关系。讨论了控制常微分方程组振荡的参数。
Abstract. This paper presents a numerical study of the oscillations (or recurrences) of tropospheric ozone depletion events (ODEs) using the further-developed one-dimensional KInetic aNALysis of reaction mechanics with Transport (KINAL-T) chemistry transport model. Reactive bromine is the major contributor to the occurrence of ODEs. After the termination of an ODE, the reactive bromine in the air is deposited onto aerosols or on the snow surface, and the ozone may regenerate via NOx-catalyzed photochemistry or by turbulent transport from the free troposphere into the boundary layer. The replenished ozone then is available for the next cycle of autocatalytic bromine release (bromine explosion) leading to another ODE. The oscillation periods are found to be as short as 5 d for the purely chemically NOx-driven oscillation and 30 d for a diffusion-driven oscillation. An important requirement for oscillation of ODEs to occur is found to be a sufficiently strong inversion layer. In a parameter study, the dependence of the oscillation period on the nitrogen oxides' concentration, the inversion layer strength, the ambient temperature, the aerosol density, and the solar radiation is investigated. Parameters controlling the oscillation of ODEs are discussed.
DOI: 10.1088/0031-9112/31/5/037
发表时间: 1980
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影响因子: --
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