Mathematics – Logic
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3412810s&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 12, CiteID L12810
Mathematics
Logic
37
Atmospheric Composition And Structure: Middle Atmosphere: Constituent Transport And Chemistry (3334), Ionosphere: Particle Precipitation, Atmospheric Processes: Remote Sensing, Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry
Scientific paper
We report GOMOS nighttime observations of middle atmosphere NO2 and O3 profiles during eight recent polar winters in the Arctic and Antarctic. The NO2 measurements are used to study the effects of energetic particle precipitation and further downward transport of polar NO x . During seven of the eight observed winters NO x enhancements occur in good correlation with levels of enhanced high-energy particle precipitation and/or geomagnetic activity as indicated by the A p index. We find a nearly linear relationship between the average winter time A p index and upper stratospheric polar winter NO2 column density in both hemispheres. In the Arctic winter 2005-2006 the NO x enhancement is higher than expected from the geomagnetic conditions, indicating the importance of changing meteorological conditions.
Backman Leif
Clilverd Mark A.
Kyrola Erkki
Randall Cora E.
Seppälä Annika
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