Academic Journal
Martian Atmospheric Temperature and Density Profiles During the First Year of NOMAD/TGO Solar Occultation Measurements
| العنوان: | Martian Atmospheric Temperature and Density Profiles During the First Year of NOMAD/TGO Solar Occultation Measurements |
|---|---|
| المؤلفون: | López-Valverde, Miguel Angel, Funke, Bernd, Brines, Adrian, Stolzenbach, Aurèlien, Modak, Ashimananda, Hill, Brittany, González-Galindo, Francisco, Thomas, Ian, Trompet, Loic, Aoki, Shohei, Villanueva, Gerónimo, Liuzzi, Giuliano, Erwin, Justin, Grabowski, Udo, Forget, Francois, López-Moreno, José Juan, Rodriguez-Gómez, Julio, Ristic, Bojan, Daerden, Frank, Bellucci, Giancarlo, Patel, Manish, Vandaele, Ann-Carine |
| المساهمون: | Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X), Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-École nationale des ponts et chaussées (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS-PSL, École normale supérieure - Paris (ENS-PSL), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) |
| المصدر: | ISSN: 2169-9097. |
| بيانات النشر: | CCSD Wiley-Blackwell |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Mars, remote sounding, atmospheric structure, NOMAD, ExoMars/TGO, planetary atmospheres, Earth Science, [SDU]Sciences of the Universe [physics] |
| الوصف: | International audience ; We present vertical profiles of temperature and density from solar occultation (SO) observations by the "Nadir and Occultation for Mars Discovery" (NOMAD) spectrometer on board the Trace Gas Orbiter during its first operational year, which covered the second half of Mars Year 34. We used calibrated transmittance spectra in 380 scans, and apply an in-house pre-processing to clean data systematics. Temperature and CO 2 profiles up to about 90 km, with consistent hydrostatic adjustment, are obtained, after adapting an Earth-tested retrieval scheme to Mars conditions. Both pre-processing and retrieval are discussed to illustrate their performance and robustness. Our results reveal the large impact of the MY34 Global Dust Storm (GDS), which warmed the atmosphere at all altitudes. The large GDS aerosols opacity limited the sounding of tropospheric layers. The retrieved temperatures agree well with global climate models (GCM) at tropospheric altitudes, but NOMAD mesospheric temperatures are wavier and globally colder by 10 K in the perihelion season, particularly during the GDS and its decay phase. We observe a warm layer around 80 km during the Southern Spring, especially in the Northern Hemisphere morning terminator, associated to large thermal tides, significantly stronger than in the GCM. Cold mesospheric pockets, close to CO 2 condensation temperatures, are more frequently observed than in the GCM. NOMAD CO 2 densities show oscillations upon a seasonal trend that track well the latitudinal variations expected. Results uncertainties and suggestions to improve future data re-analysis are briefly discussed. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | BIBCODE: 2023JGRE.12807278L |
| DOI: | 10.1029/2022JE007278 |
| الاتاحة: | https://insu.hal.science/insu-04196538 https://insu.hal.science/insu-04196538v1/document https://insu.hal.science/insu-04196538v1/file/JGR%20Planets%20-%202022%20-%20L%20pez%E2%80%90Valverde.pdf https://doi.org/10.1029/2022JE007278 |
| Rights: | http://creativecommons.org/licenses/by/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.2BE5D59D |
| قاعدة البيانات: | BASE |
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