Evidence map›Paper›PMID 39058782›Full record

ArticleScience advances2024

Martian atmospheric hydrogen and deuterium: Seasonal changes and paradigm for escape to space.

John T Clarke, Majd Mayyasi, Dolon Bhattacharyya, Jean-Yves Chaufray, Nicolas Schneider, Bruce Jakosky, Roger Yelle, Franck Montmessin, Michael Chaffin, Shannon Curry and 17 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Science advances, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

27 authors.

John T ClarkeCenter for Space Physics, Boston University, Boston, MA, USA.ORCID 0000-0002-8446-2645
Majd MayyasiCenter for Space Physics, Boston University, Boston, MA, USA.ORCID 0000-0002-5663-602X
Dolon BhattacharyyaCenter for Space Physics, Boston University, Boston, MA, USA.ORCID 0000-0003-1375-7101
Jean-Yves ChaufrayLATMOS, CNRS UVS/UPS/SU, Guyancourt, France.ORCID 0000-0003-1931-124X
Nicolas SchneiderLASP, University of Colorado, Boulder, CO, USA.ORCID 0000-0001-6720-5519
Bruce JakoskyLASP, University of Colorado, Boulder, CO, USA.ORCID 0000-0002-0758-9976
Roger YelleLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.ORCID 0000-0002-2587-9539
Franck MontmessinLATMOS, CNRS UVS/UPS/SU, Guyancourt, France.
Michael ChaffinLASP, University of Colorado, Boulder, CO, USA.
Shannon CurrySpace Sciences Laboratory, University of California, Berkeley, CA, USA.
Justin DeighanLASP, University of Colorado, Boulder, CO, USA.
Sonal JainLASP, University of Colorado, Boulder, CO, USA.
Jean-Loup BertauxLATMOS, CNRS UVS/UPS/SU, Guyancourt, France.
Eryn CangiLASP, University of Colorado, Boulder, CO, USA.
Matteo CrismaniCalifornia State University, San Bernadino, CA, USA.
Scott EvansCPI Inc., Arlington, VA, USA.
Sumedha GuptaLASP, University of Colorado, Boulder, CO, USA.
Franck LefevreLATMOS, CNRS UVS/UPS/SU, Guyancourt, France.
Greg HolsclawLASP, University of Colorado, Boulder, CO, USA.
Daniel LoLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.
William McClintockLASP, University of Colorado, Boulder, CO, USA.
Michael StevensSpace Science Division, Naval Research Laboratory, Washington, DC, USA.
Ian StewartLASP, University of Colorado, Boulder, CO, USA.
Shane StoneNASA Goddard Space Flight Center, Greenbelt, MD, USA.
Paul MahaffyNASA Goddard Space Flight Center, Greenbelt, MD, USA.
Mehdi BennaUniversity of Maryland Baltimore County, Baltimore County, MD, USA.
Meredith ElrodUniversity of Maryland, College Park, MD, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mars' water history is fundamental to understanding Earth-like planet evolution. Water escapes to space as atoms, and hydrogen atoms escape faster than deuterium giving an increase in the residual D/H ratio. The present ratio reflects the total water Mars has lost. Observations with the Mars Atmosphere and Volatile Evolution (MAVEN) and Hubble Space Telescope (HST) spacecraft provide atomic densities and escape rates for H and D. Large increases near perihelion observed each martian year are consistent with a strong upwelling of water vapor. Short-term changes require processes in addition to thermal escape, likely from atmospheric dynamics and superthermal atoms. Including escape from hot atoms, both H and D escape rapidly, and the escape fluxes are limited by resupply from the lower atmosphere. In this paradigm for the escape of water, the D/H ratio of the escaping atoms and the enhancement in water are determined by upwelling water vapor and atmospheric dynamics rather than by the specific details of atomic escape.

Identifiers

PMID39058782
PMCPMC11277398

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