ACE-FTS measurements across the edge of the winter 2004 Arctic vortex

Details ACE-FTS measurements across the edge of the winter 2004 Arctic vortex ACE-FTS measurements across the edge of the winter 2004 Arctic vortex

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3215s05n&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 15, CiteID L15S05

Mathematics

Logic

10

Atmospheric Composition And Structure: Middle Atmosphere: Constituent Transport And Chemistry (3334), Atmospheric Composition And Structure: Instruments And Techniques, Atmospheric Processes: Mesospheric Dynamics, Atmospheric Processes: Polar Meteorology

Scientific paper

Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) solar occultation measurements have been used to create volume mixing ratio (VMR) profiles of H2O, CH4, and N2O inside and outside the 2004 Arctic vortex. Using derived meteorological quantities such as potential vorticity, we have classified 450 occultations (from February and March 2004 spanning 0 to 79.8°N) as vortex, vortex edge, or extravortex. We plot [CH4] versus [N2O] correlations to display the distinct patterns observed for measurements of different air masses and use these correlations to further classify the extravortex occultations as tropical, subtropical, or midlatitude. Using comparisons between high latitude profiles of [N2O], [CH4], and [H2O] inside and outside the Arctic vortex, we estimate upper stratospheric and lower mesospheric descent rates and find that descent in the winter 2004 Arctic vortex was rapid, with evidence of descent at higher altitudes than in past years.

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