DOI: 10.1016/j.icarus.2020.113666
论文题名: Airglow remote sensing of the seasonal variation of the Martian upper atmosphere: MAVEN limb observations and model comparison
作者: Gkouvelis L. ; Gérard J.-C. ; Ritter B. ; Hubert B. ; Schneider N.M. ; Jain S.K.
刊名: Icarus
ISSN: 191035
出版年: 2020
卷: 341 语种: 英语
英文关键词: Airglow
; IUVS
; Mars
; MAVEN
; Seasonal variation
英文摘要: We apply a new technique to remotely sense the seasonal altitude variation of the 0.39μbar isobar level in this region. We present results from observations of airglow limb profiles collected during two Martian years with the Imaging UltraViolet Spectrograph (IUVS) onboard MAVEN. IUVS has collected tens of thousands of Martian airglow limb profiles since the Fall of 2014. We analyze the global dayglow dataset of the 297.2 nm emission corresponding to the O(3P-1S) forbidden transition. The vertical profile of this unique emission shows two peaks: one around 120 km and a second one near 80 km. We use both peaks to trace the altitude changes of the isobars in this atmospheric region. We map and compare them with the seasonal variations of the O(1S) with CO2 + UV doublet peak. We find that the altitude of the 0.39μbar level varies by up to 20 km. We show that the dayglow model overpredicts the lower peak altitude by 2–5 km from the observations while it underpredicts the upper peak altitude with the same offset. The best agreement near 80 km is obtained by decreasing the CO2 density by the Mars Climate Database (MCD) by about 40%. © 2020 Elsevier Inc. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158337
Appears in Collections: 气候变化与战略
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作者单位: LPAP, STAR Institute, université de Liège, Belgium; LASP, University of Colorado, United States
Recommended Citation:
Gkouvelis L.,Gérard J.-C.,Ritter B.,et al. Airglow remote sensing of the seasonal variation of the Martian upper atmosphere: MAVEN limb observations and model comparison[J]. Icarus,2020-01-01,341