globalchange  > 气候减缓与适应
DOI: 10.1002/2017JE005454
Scopus记录号: 2-s2.0-85042316493
论文题名:
Seasonal Atmospheric Argon Variability Measured in the Equatorial Region of Mars by the Mars Exploration Rover Alpha Particle X-Ray Spectrometers: Evidence for an Annual Argon-Enriched Front
作者: VanBommel S.J.; Gellert R.; Clark B.C.; Ming D.W.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期:2
起始页码: 544
结束页码: 558
语种: 英语
英文关键词: APXS ; argon ; atmosphere ; circulation ; Mars ; noncondensable
Scopus关键词: argon ; atmospheric circulation ; exploration ; Mars ; polar region ; seasonal variation ; spectrometer ; X-ray spectroscopy
英文摘要: The Mars Exploration Rover Opportunity (MER-B) has been exploring the surface of Mars since landing in 2004. Its Alpha Particle X-ray Spectrometer (APXS) is primarily used to interrogate the chemical composition of rocks and soil samples in situ. Additionally, the APXS has measured the atmosphere of Mars with a regular cadence, monitoring the change in relative atmospheric argon density. Atmospheric measurements with the MER-B APXS span over six Mars years providing an unprecedented level of statistics for careful study of the ubiquitous APXS spectral background. Several models were applied to high-frequency long-duration Spirit rover atmospheric APXS measurements. The most stable model with the least uncertainty was applied to the MER-B data set. Seasonal variation of 10–15% in equatorial atmospheric argon density was observed - in agreement with existing literature and global climate models. Unseen in previous work and global climate models, an abrupt deviation from the model-predicted annual mixing ratio was measured by the MER-B APXS around Ls 150. The sharp change, ~10% over 10° Ls, provides strong evidence for a northward migrating front, enriched in argon, sourced from the south pole at the end of southern winter. A similar weaker front is possibly observed around Ls 325, sourced from the northern polar region. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114581
Appears in Collections:气候减缓与适应

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作者单位: Department of Physics, University of Guelph, Guelph, ON, Canada; Space Science Institute, Boulder, CO, United States; NASA Johnson Space Center, Houston, TX, United States

Recommended Citation:
VanBommel S.J.,Gellert R.,Clark B.C.,et al. Seasonal Atmospheric Argon Variability Measured in the Equatorial Region of Mars by the Mars Exploration Rover Alpha Particle X-Ray Spectrometers: Evidence for an Annual Argon-Enriched Front[J]. Journal of Geophysical Research: Planets,2018-01-01,123(2)
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