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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Effects of meteoric smoke particles on the D region ion chemistry
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Effects of meteoric smoke particles on the D region ion chemistry

机译：影响大气烟雾粒子的D地区离子化学

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摘要

This study focuses on meteor smoke particle (MSP) induced effects on the D region ion chemistry. Hereby, MSPs, represented with an 11 bin size distribution, have been included as an active component into the Sodanky? Ion and Neutral Chemistry model. By doing that, we model the diurnal variation of the negatively and positively charged MSPs as well as ions and the electron density under quiet ionospheric conditions. Two distinct points in time are studied in more detail, i.e., one for sunlit conditions (Solar zenith angle is 72°) and one for dark conditions (Solar zenith angle is 103°). We find nightly decrease of free electrons and negative ions, the positive ion density is enhanced at altitudes above 80 km and reduced below. During sunlit conditions the electron density is enhanced between 60 and 70 km altitude, while there is a reduction in negative and positive ions densities. In general, the MSP influence on the ion chemistry is caused by changes in the electron density. On the one hand, these changes occur due to nightly electron scavenging by MSPs resulting in a reduced electron-ion recombination. As a consequence positive ion density increase, especially water cluster ions are highly affected. On the other hand, the electron density is slightly increased during daytime by a MSP-related production due to solar radiation. Thus, more electrons attach to neutrals and short-lived negative ions increase in number density. The direct attachment of ions to MSPs is a minor process, but important for long living ions.
机译：本研究着重于流星烟雾粒子(MSP)对D地区离子化学诱导的影响。在此,议员,代表11本大小作为一个活跃的分布组件Sodanky ?化学模型。消极的日变化特征带正电的议员以及离子电离层电子密度下安静条件。详细研究,即阳光条件(太阳天顶角72°)和一个黑暗条件(太阳天顶角是103°)。我们发现夜间减少电子和自由负离子,正离子密度增强在海拔80千米,减少在下面。密度是提高60至70公里高度,虽然有消极的减少和积极的离子密度。影响离子化学所致电子密度的变化。这些变化发生由于夜间电子清除由议员导致减少电子离子复合。正离子密度增加,尤其是水集群离子高度的影响。一方面,电子密度略有增加白天由于MSP-related生产太阳辐射。中性色和短暂的负离子增加在数密度。议员是一个小的过程,但却是重要的长期生活离子。

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