Computer Science – Sound
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3112114w&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 12, CiteID L12114
Computer Science
Sound
16
Atmospheric Composition And Structure: Pressure, Density, And Temperature, Atmospheric Composition And Structure: Middle Atmosphere-Constituent Transport And Chemistry (3334), Global Change: Remote Sensing
Scientific paper
A variance analysis technique is developed here to extract gravity wave (GW) induced temperature fluctuations from NOAA AMSU-A (Advanced Microwave Sounding Unit-A) radiance measurements. By carefully removing the instrument/measurement noise, the algorithm can produce reliable GW variances with the minimum detectable value as small as 0.1 K2. Preliminary analyses with AMSU-A data show GW variance maps in the stratosphere have very similar distributions to those found with the UARS MLS (Upper Atmosphere Research Satellite Microwave Limb Sounder). However, the AMSU-A offers better horizontal and temporal resolution for observing regional GW variability, such as activity over sub-Antarctic islands.
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