Storm-time enhancement of mid-latitude ultraviolet emissions due to energetic neutral atom precipitation

Details Storm-time enhancement of mid-latitude ultraviolet emissions due to energetic neutral atom precipitation Storm-time enhancement of mid-latitude ultraviolet emissions due to energetic neutral atom precipitation

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3215105d&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 15, CiteID L15105

Physics

Plasma Physics

4

Atmospheric Composition And Structure: Thermosphere: Composition And Chemistry, Atmospheric Composition And Structure: Thermosphere: Energy Deposition (3369), Ionosphere: Particle Precipitation, Atmospheric Processes: Thermospheric Dynamics (0358), Space Plasma Physics: Neutral Particles (2151)

Scientific paper

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.

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