Physics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3319814j&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 19, CiteID L19814
Physics
7
Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Atmospheric Processes: Remote Sensing, Atmospheric Processes: Stratosphere/Troposphere Interactions
Scientific paper
Arctic denitrification in the winter 2004/2005 is analyzed using measurements from the satellite instrument ACE-FTS. Two methods based on changes in the correlations of odd nitrogen (NOy) versus methane and versus an artificial long-lived tracer are employed. The observations show that significant denitrification occurred in the region 15 km-20 km and that it was spatially inhomogeneous within the polar vortex. Before the vortex breakup in mid-March 2005 a maximum denitrification of 8 +/- 0.8 ppbv, accounting for a relative reduction of over 50%, was observed at ~450 K (~17 km) using both methods. When averaged over the polar vortex for the first half of March, the denitrification at this level was about 4.4 ppbv and 5.0 ppbv from the artificial tracer method and the correlation method, respectively.
Beagley Stephen R.
Bernath Peter F.
Boone Chris D.
Jin Jeongwan
Jonsson Andreas I.
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