气候变化领域集成服务门户(CCPortal): Enhanced water loss from the martian atmosphere during a regional-scale dust storm and implications for long-term water loss

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DOI	10.1016/j.epsl.2021.117109
	Enhanced water loss from the martian atmosphere during a regional-scale dust storm and implications for long-term water loss
	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.
发表日期	2021
ISSN	0012821X
卷号	571
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
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
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203134
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
推荐引用方式 GB/T 7714	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],2021,571.
APA	Holmes J.A..,Lewis S.R..,Patel M.R..,Chaffin M.S..,Cangi E.M..,...&Vandaele A.C..(2021).Enhanced water loss from the martian atmosphere during a regional-scale dust storm and implications for long-term water loss.Earth and Planetary Science Letters,571.
MLA	Holmes J.A.,et al."Enhanced water loss from the martian atmosphere during a regional-scale dust storm and implications for long-term water loss".Earth and Planetary Science Letters 571(2021).