Show simple item record

dc.contributor.authorFeng, Wuhu
dc.contributor.authorKaifler, Bernd
dc.contributor.authorMarsh, Daniel R.
dc.contributor.authorHöffner, Josef
dc.contributor.authorHoppe, Ulf-Peter
dc.contributor.authorWilliams, Bifford P.
dc.contributor.authorPlane, John M.C.
dc.date.accessioned2022-05-20T11:57:10Z
dc.date.available2022-05-20T11:57:10Z
dc.date.issued2017-02-11
dc.description.abstractWe report measurements of atomic sodium, iron and temperature in the mesosphere and lower thermosphere (MLT) made by ground-based lidars at the ALOMAR observatory (69°N, 16°E) during a major sudden stratospheric warming (SSW) event that occurred in January 2009. The high resolution temporal observations allow the responses of the Na and Fe layers to the SSW at high northern latitudes to be investigated. A significant cooling with temperatures as low as 136 K around 90 km was observed on 22–23 January 2009, along with substantial depletions of the Na and Fe layers (an ~80% decrease in the column abundance with respect to the mean over the observation period). The Whole Atmosphere Community Climate Model (WACCM) incorporating the chemistry of Na, Fe, Mg and K, and nudged with reanalysis data below 60 km, captures well the timing of the SSW, although the extent of the cooling and consequently the depletion in the Na and Fe layers is slightly underestimated. The model also predicts that the perturbations to the metal layers would have been observable even at equatorial latitudes. The modelled Mg layer responds in a very similar way to Na and Fe, whereas the K layer is barely affected by the SSW because of the enhanced conversion of K+ ions to K atoms at the very low temperatures.en_US
dc.identifier.citationFeng W, Kaifler, Marsh DR, Höffner J, Hoppe U, Williams BP, Plane JM. Impacts of a sudden stratospheric warming on the mesospheric metal layers. Journal of Atmospheric and Solar-Terrestrial Physics. 2017;162:162-171en_US
dc.identifier.cristinIDFRIDAID 1544282
dc.identifier.doi10.1016/j.jastp.2017.02.004
dc.identifier.issn1364-6826
dc.identifier.issn1879-1824
dc.identifier.urihttps://hdl.handle.net/10037/25243
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalJournal of Atmospheric and Solar-Terrestrial Physics
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7-IDEAS-ERC/291332/EU/Cosmic Dust in the Terrestrial Atmosphere/CODITA/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2017 The Author(s)en_US
dc.titleImpacts of a sudden stratospheric warming on the mesospheric metal layersen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record