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Determination of the Venus eddy diffusion profile from CO and CO2 profiles using SOIR/Venus Express observations

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dc.contributor.authorMahieux, A.
dc.contributor.authorYelle, R V
dc.contributor.authorYoshida, Nao
dc.contributor.authorRobert, S.
dc.contributor.authorPiccialli, Arianna
dc.contributor.authorNakagawa, Hiromu
dc.contributor.authorKasaba, Yasumasa
dc.contributor.authorMills, Frank
dc.contributor.authorVandaele, A.C.
dc.date.accessioned2022-10-20T01:32:44Z
dc.date.issued2021
dc.date.updated2021-11-28T07:24:19Z
dc.description.abstractWe present a study of the SOIR/Venus Express CO2 and CO profiles in order to constrain the eddy diffusion profile in the Venus mesosphere (80 to 130 km of altitude). We compute the mean number density profile of both species, and the hydrostatic temperature based on the CO2 mean density profile. We use a 1D-photochemical/ diffusion model to adjust the eddy diffusion profile such that the 1D-model and SOIR CO profiles best agree. We compare our results with eddy diffusion profiles found in the literature. We use our approach to revisit the He and CO2 profiles from Pioneer Venus probe mass spectrometer in order to derive an eddy diffusion profile extending from 80 to 200 km of altitude. Our eddy diffusion profile is different in shape and in magnitude compared to the Pioneer Venus profile: it is equal to 3.6 × 106 cm2/s at 110 km, 7.5 × 106 cm2/s at 120 km, 0.4 × 106 cm2/s at 130 km, and 201 × 106 cm2/s at 140 km, and constant below 110 km and above 140 km. This new eddy diffusion profile can be used in Venus Global Circulation Models as well as 1D-photochemical models.en_AU
dc.description.sponsorshipThe research program was supported by the Belgian Federal Science Policy Office and the European Space Agency (ESA, PRODEX program, contracts C 90268, 90113, 17645, 90323, and 4000107727). A. Mahieux was supported by the Marie Skłodowska-Curie Action from the European Commission under grant number 838587. S. Robert thanks BELSPO for the FED-tWIN funding (Prf-2019-077 - RT-MOen_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0019-1035en_AU
dc.identifier.urihttp://hdl.handle.net/1885/275675
dc.language.isoen_AUen_AU
dc.publisherAcademic Pressen_AU
dc.rights© 2021 The authorsen_AU
dc.sourceIcarusen_AU
dc.subjectVenusen_AU
dc.subjectEddy diffusion coefficienten_AU
dc.subjectModellingen_AU
dc.subjectMesosphereen_AU
dc.subjectThermosphereen_AU
dc.titleDetermination of the Venus eddy diffusion profile from CO and CO2 profiles using SOIR/Venus Express observationsen_AU
dc.typeJournal articleen_AU
local.contributor.affiliationMahieux, A., Belgian Institute for Space Aeronomyen_AU
local.contributor.affiliationYelle, R V, University of Arizonaen_AU
local.contributor.affiliationYoshida, Nao, Tohoku Universityen_AU
local.contributor.affiliationRobert, S., Royal Belgian Institute for Space Aeronomyen_AU
local.contributor.affiliationPiccialli, Arianna, Royal Belgian Institute for Space Aeronomyen_AU
local.contributor.affiliationNakagawa, Hiromu, Tohoku Universityen_AU
local.contributor.affiliationKasaba, Yasumasa, Tohoku Universityen_AU
local.contributor.affiliationMills, Frank, College of Science, ANUen_AU
local.contributor.affiliationVandaele, A.C., Belgium Institute for Space Aeronomyen_AU
local.contributor.authoruidMills, Frank, u4064907en_AU
local.description.embargo2099-12-31
local.description.notesImported from ARIESen_AU
local.identifier.absfor000000 - Internal ANU use onlyen_AU
local.identifier.ariespublicationa383154xPUB17612en_AU
local.identifier.citationvolume361en_AU
local.identifier.doi10.1016/j.icarus.2021.114388en_AU
local.identifier.scopusID2-s2.0-85101505999
local.publisher.urlhttps://www.sciencedirect.com/en_AU
local.type.statusPublished Versionen_AU

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