DOI: 10.1038/ngeo1650
论文题名: Variations of sulphur dioxide at the cloud top of Venus's dynamic atmosphere
作者: Marcq E. ; Bertaux J.-L. ; Montmessin F. ; Belyaev D.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 1 起始页码: 25
结束页码: 28
语种: 英语
Scopus关键词: atmospheric circulation
; plume
; sulfur dioxide
; temporal variation
; timescale
; ultraviolet radiation
; upwelling
; Venus
; volcanism
英文摘要: Sulphur dioxide is a million times more abundant in the atmosphere of Venus than that of Earth, possibly as a result of volcanism on Venus within the past billion years. A tenfold decrease in sulphur dioxide column density above Venus's clouds measured by the Pioneer Venus spacecraft during the 1970s and 1980s has been interpreted as decline following an episode of volcanogenic upwelling from the lower atmosphere. Here we report that the sulphur dioxide column density above Venus's clouds decreased by an order of magnitude between 2007 and 2012 using ultraviolet spectrometer data from the SPICAV instrument onboard the Venus Express spacecraft. This decline is similar to observations during the 1980s. We also report strong latitudinal and temporal variability in sulphur dioxide column density that is consistent with supply fluctuations from the lower atmosphere. We suggest that episodic sulphur dioxide injections to the cloud tops may be caused either by periods of increased buoyancy of volcanic plumes, or, in the absence of active volcanism, by long-period oscillations of the general atmospheric circulation. The 30-year observational record from Pioneer Venus and Venus Express confirms that episodic injections of sulphur dioxide above the clouds recur on decadal timescales, suggesting a more variable atmosphere than expected. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106902
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: LATMOS/CNRS/UVSQ, 11 Boulevard d'Alembert, F-78280 Guyancourt, France; Space Research Institute (IKI), 84/32 Profsoyouznaya Street, Moscow 117997, Russian Federation
Recommended Citation:
Marcq E.,Bertaux J.-L.,Montmessin F.,et al. Variations of sulphur dioxide at the cloud top of Venus's dynamic atmosphere[J]. Nature Geoscience,2013-01-01,6(1)