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GEOPHYSICAL RESEARCH LETTERS,
VOL. 32,
L15105,
4 PP., 2005
doi:10.1029/2005GL023059
Storm-time enhancement of mid-latitude ultraviolet emissions due to energetic neutral atom precipitation
Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA
Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA
Space Science Laboratory, University of California, Berkeley, California, USA
Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA
Harvard Smithsonian Center for Astrophysics, Cambridge, Massachusetts, USA
Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA
Harvard Smithsonian Center for Astrophysics, Cambridge, Massachusetts, USA
In this work we present a direct connection between Energetic Neutral Atom (ENA) precipitation and enhanced ultraviolet emissions from the mid-latitude thermosphere during times of geomagnetic disturbance. Data from the IMAGE/HENA instrument provides information about ENA emission from the ring current, the IMAGE/FUV instrument shows the temporal response of the ultraviolet airglow, and data from TIMED/GUVI is used to infer the vertical distribution of the airglow enhancement. We find that the airglow signature is well correlated with energetic atom precipitation. The ultraviolet emission has a maximum above 120 km tangent altitude and is dominated by OI 135.6 nm emission. The relative brightness of 135.6 nm emission and OI 130.4 nm radiance suggest a lack of an electron cascade.
Received 22 March 2005; accepted 19 July 2005; published 12 August 2005.
Citation: (2005), Storm-time enhancement of mid-latitude ultraviolet emissions due to energetic neutral atom precipitation, Geophys. Res. Lett., 32, L15105, doi:10.1029/2005GL023059.
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