A parametric study of SO2 scale height as a probe of the sulfur cycle at the Venusian cloud top
A parametric study of SO2 scale height as a probe of the sulfur cycle at the Venusian cloud top
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SO2 尺度高度的参数研究作为金星云顶硫循环的探针
DOI：
10.1029/2000je001261
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发表时间：
2001
影响因子：
--
通讯作者：
Masaru Yamamoto
中科院分区：
文献类型：
--
作者：
Masaru Yamamoto
在金星的云顶（~ 70 km）， SO2尺度高度HSO2是重要的观测量之一，它不仅为我们提供了关于SO2垂直分布的科学信息，而且还提供了SO2的化学和运输过程。HSO2是由SO2光解速率和通过SO2在硫循环中的氧化作用（包括SOx-ClOx催化作用）控制的ClO和SO2的浓度。在SOx-ClOx过程中，HSO2的敏感性分为三种状态：低效氧化，低clo和高clo状态。另一方面，HSO2对SO2氧化和垂直流动的敏感性也分为三个阶段：阶段O， HSO2受SO2氧化控制，阶段D， HSO2受向下流动控制，以及阶段U， HSO2对SO2氧化和垂直流动都不敏感。通过对HSO2在化学和输移过程中的敏感性的探索，我们发现，为了重现高纬度地区观测到的少量HSO2，除了SOx-ClOx催化作用外，还需要强的向下流动或其他SO2氧化过程。
At Venus's cloud top (∼70 km) the SO2 scale height HSO2 is one of the important observational quantities to give us scientific information about not only the vertical distribution of SO2 but also the chemical and transport processes of SO2. HSO2 is controlled by the SO2 photodissociation rate and by the concentrations of ClO and SO2 through the SO2 oxidation in the sulfur cycle including the SOx-ClOx catalysis. The sensitivity of HSO2 in the SOx-ClOx process is classified into three regimes: inefficient-oxidation, low-ClO, and high-ClO regimes. On the other hand, the sensitivity of HSO2 to the SO2 oxidation and the vertical flow is also classified into three regimes: regime O, where HSO2 is controlled by the SO2 oxidation, regime D, where HSO2 is controlled by the downward flow, and regime U, where HSO2 is insensitive to both the SO2 oxidation and the vertical flow. As a result of exploring the sensitivity of HSO2 in the chemical and transport processes, either strong downward flow or some other SO2 oxidation process in addition to the SOx-ClOx catalysis is required in order to reproduce the small HSO2 observed at high latitudes.