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Martian Atmospheric Aerosols Composition and Distribution Retrievals During the First Martian Year of NOMAD/TGO Solar Occultation Measurements: 1. Methodology and Application to the MY 34 Global Dust Storm

Stolzenbach, Aurélien ; López Valverde, Miguel-Angel; Brines, Adrian; Modak, Ashimananda; Funke, Bernd; González-Galindo, Francisco; Thomas, Ian; Liuzzi, Giuliano; Villanueva, Gerónimo; Luginin, Mikhail; Aoki, Shohei; Grabowski, Udo 1; Lopez Moreno, José Juan; Rodrìguez Gòmez, Julio; Wolff, Mike; Ristic, Bojan; Daerden, Frank; Bellucci, Giancarlo; Patel, Manish; ... mehr

Abstract:

Since the beginning of the Trace Gas Orbiter (TGO) science operations in April 2018, its instrument “Nadir and Occultation for MArs Discovery” (NOMAD) supplies detailed observations of the IR spectrums of the Martian atmosphere. We developed a procedure that allows us to evaluate the composition and distribution's parameters of the atmospheric Martian aerosols. We use a retrieval program (RCP) in conjunction with a radiative forward model (KOPRA) to evaluate the vertical profile of aerosol extinction from NOMAD measurements. We then apply a model/data fitting strategy of the aerosol extinction. In this first article, we describe the method used to evaluate the parameters representing the Martian aerosol composition and size distribution. MY 34 GDS showed a peak intensity from LS 190° to 210°. During this period, the aerosol content rises multiple scale height, reaching altitudes up to 100 km. The lowermost altitude of aerosol's detection during NOMAD observation rises up to 30 km. Dust aerosols reff were observed to be close to 1 μm and its νeff lower than 0.2. Water ice aerosols reff were observed to be submicron with a νeff lower than 0.2. ... mehr

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Atmosphärische Spurengase und Fernerkundung (IMKASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2023
Sprache Englisch
Identifikator ISSN: 2169-9097, 2169-9100
KITopen-ID: 1000165850
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 Art.: e2022JE007276
Vorab online veröffentlicht am 20.11.2023
Schlagwörter Mars, aerosol, TGO, NOMAD, GDS
Nachgewiesen in Scopus
Dimensions
Web of Science

Verlagsausgabe §
DOI: 10.5445/IR/1000165850
Veröffentlicht am 19.12.2023
Originalveröffentlichung
DOI: 10.1029/2022JE007276
Scopus
Zitationen: 5
Web of Science
Zitationen: 3
Dimensions
Zitationen: 3
Seitenaufrufe: 50
seit 19.12.2023
Downloads: 30
seit 07.01.2024
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