DOI: 10.1016/j.epsl.2021.117109
论文题名: Enhanced water loss from the martian atmosphere during a regional-scale dust storm and implications for long-term water loss
作者: Holmes J.A. ; Lewis S.R. ; Patel M.R. ; Chaffin M.S. ; Cangi E.M. ; Deighan J. ; Schneider N.M. ; Aoki S. ; Fedorova A.A. ; Kass D.M. ; Vandaele A.C.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 571 语种: 英语
中文关键词: data assimilation
; global climate model (GCM)
; Mars atmosphere
; Mars chemistry
; Mars climate
; Mars reanalysis
英文关键词: Climate models
; Dust
; Earth atmosphere
; Hydrogen
; Photolysis
; Water vapor
; Data assimilation
; Dust storm
; Global climate model
; Mars atmosphere
; Mars chemistry
; Mars climate
; Mars reanalysis
; Regional scale
; Water loss
; Water vapour
; Storms
英文摘要: Lower atmosphere variations in the martian water vapour and hydrogen abundance during the late southern summer regional-scale dust storm from LS = 326.1°–333.5° Mars Year 34 (18th-31st January 2019) and their associated effect on hydrogen escape are investigated using a multi-spacecraft assimilation of atmospheric retrievals into a Martian global circulation model. The dusty conditions led to an elevation of the hygropause and associated increase in middle atmosphere hydrogen at the peak of the dust storm, which was particularly intense in Mars Year 34. This response has an important effect on water loss during this time period, quantification of which can provide a more robust calculation of the integrated loss of water through time on Mars and better insight to planetary evolution. The influx of water vapour to higher altitudes led to an associated increase in hydrogen through photolysis of water vapour and a hydrogen escape rate of around 1.0×109 cm−2 s−1, meaning the late southern summer regional-scale dust storm in Mars Year 34 enhanced water loss rates on Mars to levels observed during global-scale dust storms. The water loss rate during the late southern summer regional-scale dust storm, also known as a C storm, led to around 15% of the total annual water loss during only 5% of the year and was at least three times stronger than the much less dusty C storm event in Mars Year 30. These results demonstrate that interannual variations in the strength of the late southern summer regional-scale dust storm must be considered when calculating the integrated loss of water on Mars, an important quantity to constrain in relation to the potential habitability of Mars. © 2021 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165512
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: School of Physical Sciences, The Open University, Milton Keynes, MK7 6AA, United Kingdom; Space Science and Technology Department, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire, OX11 0QX, United Kingdom; LASP, University of Colorado, United States; Royal Belgian Institute for Space Aeronomy, Belgium; Space Research Institute of the Russian Academy of Sciences (IKI RAS), Russian Federation; Jet Propulsion Laboratory, California Institute of Technology, United States
Recommended Citation:
Holmes J.A.,Lewis S.R.,Patel M.R.,et al. Enhanced water loss from the martian atmosphere during a regional-scale dust storm and implications for long-term water loss[J]. Earth and Planetary Science Letters,2021-01-01,571