Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsa21a..02p&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SA21A-02
Physics
0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition, 0394 Instruments And Techniques, 2407 Auroral Ionosphere (2704)
Scientific paper
An Atomic Oxygen sensor was launched aboard the Coupling of Dynamics and Aurora (CODA) payload at 06:20 LT on January 22, 1999 from Poker Flat, Alaska and again at 0:55 LT on February 21, 2001, both into diffuse auroras. Atomic oxygen profiles were measured in situ by a combination of resonance and florescence techniques. Comparison of the data reveals significant structural differences between the two flights. While the first flight shows similar densities and layer thickness on the upleg and downleg portions, the second flight records a significant erosion of the top side atomic oxygen profile over a 30 km horizontal extent. One possible explanation is that turbulent mixing forced by the diffuse aurora is driving the atomic oxygen recombination rate. This data indicates the spatial scales over which composition changes can occur in the auroral regions and give insight into the O/N2 ratios measured by GUVI on the TIMED spacecraft.
Christensen Andrew B.
Clemmons James
Melville Kenneth
Patterson P.
Swenson Craig
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