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Water vapor vertical distribution on Mars during perihelion season of MY 34 and MY 35 with ExoMars‐TGO/NOMAD observations

Brines, A.; López-Valverde, M. A.; Stolzenbach, A.; Modak, A.; Funke, B.; Galindo, F. G.; Aoki, S.; Villanueva, G. L.; Liuzzi, G.; Thomas, I. R.; Erwin, J. T.; Grabowski, U. 1; Forget, F.; Lopez-Moreno, J. J.; Rodriguez-Gomez, J.; Daerden, F.; Trompet, L.; Ristic, B.; Patel, M. R.; ... mehr

Abstract (englisch):

The water vapor in the Martian atmosphere plays a significant role in the planet’s climate, being crucial in most of the chemical and radiative transfer processes. Despite its importance, the vertical distribution of H2O in the atmosphere has not still been characterized precisely enough. The recent ExoMars Trace Gas Orbiter (TGO) mission, with its Nadir and Occultation for MArs Discovery (NOMAD) instrument, has allowed us to measure the H2O vertical distribution with unprecedented resolution. Recent studies of vertical profiles have shown that high dust concentration in the atmosphere, in particular during dust storms, induces an efficient transport of the H2O to higher altitudes, from 40 km up to 80 km. We study the H2O vertical distribution in a subset of solar occultations during the perihelion of two Martian years (MYs), including the 2018 Global Dust Storm (GDS), in order to compare the same Martian season under GDS and non-GDS conditions. We present our state-of-the-art retrieval scheme, and we apply it to a combination of two diffraction orders, which permits sounding up to about 100 km. We confirm recent findings of H2O increasing at high altitudes during Ls = 190-205° in MY 34, reaching abundances of about 150 ppmv at 80 km in both hemispheres not found during the same period of MY 35. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000158164
Veröffentlicht am 13.12.2023
DOI: 10.1029/2022JE007273
Zitationen: 6
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2169-9097, 2169-9100
KITopen-ID: 1000158164
HGF-Programm 12.11.25 (POF IV, LK 01) Atmospheric composition and circulation changes
Erschienen in Journal of Geophysical Research: Planets
Verlag John Wiley and Sons
Band 128
Heft 11
Seiten Nr.: e2022JE007273
Bemerkung zur Veröffentlichung This article also appears in: ExoMars Trace Gas Orbiter: One Martian Year of Science
Vorab online veröffentlicht am 26.12.2022
Externe Relationen Abstract/Volltext
Schlagwörter Mars Atmosphere Water H2O NOMAD TGO RCP KOPRA IAA IMK-ASF-SAT
Nachgewiesen in Web of Science
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