Mesoscale gravity wave variances from AMSU-A radiances

• Main Author: Dong L. Wu
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Atmospheric Composition and Structure; Pressure; density; and temperature; 0341 Atmospheric Composition and Structure; Middle atmosphere—constituent transport and chemistry (3334; 1640 Global Change; Remote sensing. Citation; Antarctic; Antarc*
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.8582; http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/40861/1/04-0023.pdf

[1] 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 showGWvariancemaps 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. INDEX TERMS: 0350