Computer Science – Sound
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsa31a..04f&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SA31A-04
Computer Science
Sound
0350 Pressure, Density, And Temperature, 3305 Climate Change And Variability (1616, 1635, 3309, 4215, 4513), 3309 Climatology (1616, 1620, 3305, 4215, 8408), 3332 Mesospheric Dynamics, 3360 Remote Sensing
Scientific paper
Over the last few years satellite observations from the Microwave Limb Sounder (MLS) on the EOS Aura spacecraft (launched July 2004) have provided near global coverage (latitude 82° S - 82° N) of many atmospheric properties and trace gas concentrations. Measurements of stratospheric and mesospheric temperatures have been made for many years above Davis Station, Antarctica (68° S, 78° E) via Lidar (since 2001) and spectroscopic observations of hydroxyl airglow (since 1995). The primary aim of this work has been to assess long term temperature changes in the high latitude upper atmosphere in response to increasing carbon dioxide in the lower atmosphere. A comparison is made in this study between the Aura/MLS temperature data set in the vicinity of Davis with the Lidar temperature profiles, over an altitude range of 25-70km and hydroxyl rotational temperatures around 87km altitude. These results serve as a data validation sample for the satellite measurements at high latitude and also place the Davis observations in a global context. One characteristic of the Davis OH temperature climatology is the large scale planetary waves that dominate winter over Davis. The amplitude (up to 40K), period (10-60 days) and phase of these waves are inconsistent from year to year and consequently have a strong influence on the statistical significance of the long term trend derived. The near global view of temperatures between 10 and 110 km provided by the Aura/MLS measurements are a valuable tool for characterizing these waves. Some examples are examined.
Burns Gary B.
French James Weir
Klekociuk Andrew R.
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