Coupling between the Arctic Middle and Upper Atmosphere during the IPY 2007-2008 Winter

Details Coupling between the Arctic Middle and Upper Atmosphere during the IPY 2007-2008 Winter Coupling between the Arctic Middle and Upper Atmosphere during the IPY 2007-2008 Winter

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa32a..06t&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA32A-06

Physics

3334 Middle Atmosphere Dynamics (0341, 0342), 3349 Polar Meteorology, 3364 Synoptic-Scale Meteorology, 3389 Tides And Planetary Waves

Scientific paper

Rayleigh lidars at Chatanika, Alaska (65N, 147W) and Kangerlussuaq, Greenland (67N, 51W) have measured the middle atmospheric density and temperature structure during the 2007-2008 winter. These lidars are part of the Arctic Observing Network during the fourth International Polar Year (IPY). The lidar observations have yielded measurements of mean profiles and the gravity wave activity in the upper stratosphere and mesosphere. TIMED-SABER satellite geopotential data are used to quantify the planetary wave activity in the middle atmosphere. UKMO and GEOS reanalysis data are used to describe the structure and evolution of the Arctic stratospheric-mesospheric vortex and Aleutian anticyclone. The lidars sampled both inside and outside the vortex and anticyclone characterizing the gravity wave activity under different synoptic regimes. A stratospheric warming occurred in late February 2008. A TIME-GCM simulation (with a model lower boundary specified by ECMWF) has been conducted for the November 2007-March 2008 period. This study allows us to characterize the planetary and gravity wave activity in the Arctic middle atmosphere during the IPY. These measurements and analyses will be compared with the TIME-GCM simulations to study the wave coupling between the middle and upper atmosphere and the expected response of the high latitude ionosphere to a stratospheric warming during the IPY.
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