Solar control of CO_2~+ ultraviolet doublet emission on Mars

NAOC Open IR

	Solar control of CO_2~+ ultraviolet doublet emission on Mars
	Li Zichuan 1; Cui Jun 2; Li Jing 2; Wu Xiaoshu1 ; Zhong Jiahao 2; Jiang Fayu 3
	2020
Source Publication	Earth and Planetary Physics
ISSN	2096-3955
Volume	4 Issue:6 Pages:543
Abstract	The CO_2~+ ultraviolet doublet (UVD) emission near 289 nm is an important feature of dayside airglow emission from planetary upper atmospheres.In this study, we analyzed the brightness profiles of CO_2~+ UVD emission on Mars by using the extensive observations made by the Imaging Ultraviolet Spectrograph on board the recent Mars Atmosphere and Volatile Evolution spacecraft.Strong solar cycle and solar zenith angle variations in peak emission intensity and altitude were revealed by the data: (1) Both the peak intensity and altitude increase with increasing solar activity, and (2) the peak intensity decreases, whereas the peak altitude increases, with increasing solar zenith angle.These observations can be favorably interpreted by the solar-driven scenario combined with the fact that photoionization and photoelectron impact ionization are the two most important processes responsible for the production of excitedstate CO_2~+ and consequently the intensity of CO_2~+ UVD emission.Despite this, we propose that an extra driver, presumably related to the complicated variation in the background atmosphere, such as the occurrence of global dust storms, is required to fully interpret the observations.In general, our analysis suggests that the CO_2~+ UVD emission is a useful diagnostic of the variability of the dayside Martian atmosphere under the influences of both internal and external drivers.
Keyword	Mars dayglow CO_2~+ MAVEN
Language	英语
Document Type	期刊论文
Identifier	http://ir.bao.ac.cn/handle/114a11/56578
Collection	中国科学院国家天文台
Affiliation	1.中国科学院国家天文台 2.中山大学 3.亚利桑那大学
First Author Affilication	National Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation GB/T 7714	Li Zichuan,Cui Jun,Li Jing,et al. Solar control of CO_2~+ ultraviolet doublet emission on Mars[J]. Earth and Planetary Physics,2020,4(6):543.
APA	Li Zichuan,Cui Jun,Li Jing,Wu Xiaoshu,Zhong Jiahao,&Jiang Fayu.(2020).Solar control of CO_2~+ ultraviolet doublet emission on Mars.Earth and Planetary Physics,4(6),543.
MLA	Li Zichuan,et al."Solar control of CO_2~+ ultraviolet doublet emission on Mars".Earth and Planetary Physics 4.6(2020):543.

Files in This Item:
There are no files associated with this item.

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

中国科学院国家天文台机构知识库