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dc.contributor.authorYi, Wen
dc.contributor.authorXue, Xianghui
dc.contributor.authorReid, Iain
dc.contributor.authorMurphy, Damian J.
dc.contributor.authorHall, Chris
dc.contributor.authorTsutsumi, Masaki
dc.contributor.authorNing, Baiqi
dc.contributor.authorLi, Guozhu
dc.contributor.authorVincent, Robert
dc.contributor.authorChen, Jinsong
dc.contributor.authorWu, Jianfei
dc.contributor.authorChen, Tingdi
dc.contributor.authorDou, Xiankang
dc.date.accessioned2019-10-08T11:58:49Z
dc.date.available2019-10-08T11:58:49Z
dc.date.issued2019-06-06
dc.description.abstractThe existing distribution of meteor radars located from high- to low-latitude regions provides a favorable temporal and spatial coverage for investigating the climatology of the global mesopause density. In this study, we report the climatology of the mesopause relative density estimated using multiyear observations from nine meteor radars, namely, the Davis Station (68.6∘ S, 77.9∘ E), Svalbard (78.3∘ N, 16∘ E) and Tromsø (69.6∘ N, 19.2∘ E) meteor radars located at high latitudes; the Mohe (53.5∘ N, 122.3∘ E), Beijing (40.3∘ N, 116.2∘ E), Mengcheng (33.4∘ N, 116.6∘ E) and Wuhan (30.5∘ N, 114.6∘ E) meteor radars located in the midlatitudes; and the Kunming (25.6∘ N, 103.8∘ E) and Darwin (12.3∘ S, 130.8∘ E) meteor radars located at low latitudes. The daily mean relative density was estimated using ambipolar diffusion coefficients derived from the meteor radars and temperatures from the Microwave Limb Sounder (MLS) on board the Aura satellite. The seasonal variations in the Davis Station meteor radar relative densities in the southern polar mesopause are mainly dominated by an annual oscillation (AO). The mesopause relative densities observed by the Svalbard and Tromsø meteor radars at high latitudes and the Mohe and Beijing meteor radars at high midlatitudes in the Northern Hemisphere show mainly an AO and a relatively weak semiannual oscillation (SAO). The mesopause relative densities observed by the Mengcheng and Wuhan meteor radars at lower midlatitudes and the Kunming and Darwin meteor radars at low latitudes show mainly an AO. The SAO is evident in the Northern Hemisphere, especially at high latitudes, and its largest amplitude, which is detected at the Tromsø meteor radar, is comparable to the AO amplitudes. These observations indicate that the mesopause relative densities over the southern and northern high latitudes exhibit a clear seasonal asymmetry. The maxima of the yearly variations in the mesopause relative densities display a clear latitudinal variation across the spring equinox as the latitude decreases; these latitudinal variation characteristics may be related to latitudinal changes influenced by gravity wave forcing. In addition to an AO, the mesopause relative densities over low latitudes also clearly show an intraseasonal variation with a periodicity of 30–60 d.en_US
dc.description.sponsorshipNational Natural Science Foundation of China Youth Innovation Promotion Association of the Chinese Academy of Sciences Chinese Meridian Project China Scholarship Councilen_US
dc.descriptionSource at <a href=https://doi.org/10.5194/acp-19-7567-2019>https://doi.org/10.5194/acp-19-7567-2019</a>.en_US
dc.identifier.citationYi, W., Xue, X., Reid, I.M., Murphy, D.J., Hall, C.M., Tsutsumi, M., ... Dou, X. (2019). Climatology of the mesopause relative density using a global distribution of meteor radars. <i>Atmospheric Chemistry and Physics, 19</i>(11), 7567-7581. https://doi.org/10.5194/acp-19-7567-2019en_US
dc.identifier.cristinIDFRIDAID 1703459
dc.identifier.doi10.5194/acp-19-7567-2019
dc.identifier.issn1680-7316
dc.identifier.issn1680-7324
dc.identifier.urihttps://hdl.handle.net/10037/16358
dc.language.isoengen_US
dc.publisherEuropean Geosciences Unionen_US
dc.relation.journalAtmospheric Chemistry and Physics
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430::Astrophysics, astronomy: 438en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Astrofysikk, astronomi: 438en_US
dc.titleClimatology of the mesopause relative density using a global distribution of meteor radarsen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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