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dc.contributor.author
Karagodin-doyennel, Arseniy
dc.contributor.author
Rozanov, Eugene
dc.contributor.author
Kuchar, Aleš
dc.contributor.author
Ball, William
dc.contributor.author
Arsenovic, Pavle
dc.contributor.author
Remsberg, Ellis
dc.contributor.author
Jöckel, Patrick
dc.contributor.author
Kunze, Markus
dc.contributor.author
Plummer, David A.
dc.contributor.author
Stenke, Andrea
dc.contributor.author
Marsh, Daniel
dc.contributor.author
Kinnison, Doug
dc.contributor.author
Peter, Thomas
dc.date.accessioned
2021-01-22T07:34:10Z
dc.date.available
2021-01-21T05:26:57Z
dc.date.available
2021-01-22T07:34:10Z
dc.date.issued
2021-01-11
dc.identifier.other
10.5194/acp-21-201-2021
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/464353
dc.identifier.doi
10.3929/ethz-b-000464353
dc.description.abstract
Water vapor (H2O) is the source of reactive hydrogen radicals in the middle atmosphere, whereas carbon monoxide (CO), being formed by CO2photolysis, is suitable as a dynamical tracer. In the mesosphere, both H2O and CO are sensitive to solar irradiance (SI) variability because of their destruction/production by solar radiation. This enables us to analyze the solar signal in both models and observed data. Here, we evaluate the mesospheric H2O and CO response to solar irradiance variability using the Chemistry- Climate Model Initiative (CCMI-1) simulations and satellite observations. We analyzed the results of four CCMI models (CMAM, EMAC-L90MA, SOCOLv3, and CESM1- WACCM 3.5) operated in CCMI reference simulation REFC1SD in specified dynamics mode, covering the period from 1984-2017. Multiple linear regression analyses show a pronounced and statistically robust response of H2O and CO to solar irradiance variability and to the annual and semiannual cycles. For periods with available satellite data, we compared the simulated solar signal against satellite observations, namely the GOZCARDS composite for 1992-2017 for H2O and Aura/MLS measurements for 2005-2017 for CO. The model results generally agree with observations and reproduce an expected negative and positive correlation for H2O and CO, respectively, with solar irradiance. However, the magnitude of the response and patterns of the solar signal varies among the considered models, indicating differences in the applied chemical reaction and dynamical schemes, including the representation of photolyzes. We suggest that there is no dominating thermospheric influence of solar irradiance in CO, as reported in previous studies, because the response to solar variability is comparable with observations in both low-top and high-top models. We stress the importance of this work for improving our understanding of the current ability and limitations of state-of-the-art models to simulate a solar signal in the chemistry and dynamics of the middle atmosphere. © 2021 Copernicus GmbH. All rights reserved.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
European Geosciences Union
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
The response of mesospheric H2O and CO to solar irradiance variability in models and observations
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.volume
21
en_US
ethz.journal.issue
1
en_US
ethz.pages.start
201
en_US
ethz.pages.end
216
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Kaltenburg-Lindau
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03517 - Peter, Thomas / Peter, Thomas
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03517 - Peter, Thomas / Peter, Thomas
ethz.date.deposited
2021-01-21T05:27:14Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-01-22T07:34:25Z
ethz.rosetta.lastUpdated
2021-02-15T23:28:51Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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