Synoptic distribution of dayside aurora: Multiple-wavelength all-sky observation at Yellow River Station in Ny-Ålesund, Svalbard - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Atmospheric and Solar-Terrestrial Physics Année : 2009

Synoptic distribution of dayside aurora: Multiple-wavelength all-sky observation at Yellow River Station in Ny-Ålesund, Svalbard

Résumé

Observations acquired from three-wavelength (427.8, 557.7 and 630.0 nm) all-sky imagers (ASIs) at Yellow River Station (YRS) in Ny-Ålesund, Svalbard, are used to examine the synoptic distribution of dayside aurora. The results demonstrate that the maximum emission regions (MERs) at each wavelength are all located in the postnoon sector, but have rather different magnetic local time (MLT) distributions from each other. The so-called 15 MLT “hot spot” is the overlapping region of the MERs at three wavelengths, and the prenoon “warm spot” is characterized uniquely by an increase of emissions at the 557.7 nm wavelength. The detailed dayside auroral spectra and morphology as a function of MLT are discussed.

Dates et versions

hal-00429171 , version 1 (01-11-2009)

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Citer

Z.-J. Hu, H. Yang, D. Huang, T. Araki, N. Sato, et al.. Synoptic distribution of dayside aurora: Multiple-wavelength all-sky observation at Yellow River Station in Ny-Ålesund, Svalbard. Journal of Atmospheric and Solar-Terrestrial Physics, 2009, 71 (8-9), pp.794-804. ⟨10.1016/j.jastp.2009.02.010⟩. ⟨hal-00429171⟩
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