Wednesday, 17 January 2007
AURA (TES), Radiosonde and Howard University Raman Lidar Intercomparison and Water Vapor Retrieval in the Waves Campaign
Exhibit Hall C (Henry B. Gonzalez Convention Center)
The WAVES ( Water Vapor Validation Experiment - Sattellites an d Sondes) took place in the Howard University Research Campus in Beltsville, Maryland during the summer of 2006. This campaign aimed acquiring a statistically robust set of summertime measurements of atmospheric water vapor, aerosols and trace gases useful for instrument accuracy assessment as well as AURA/Aqua satellite retrieval assessment. One of instruments aboard AURA to be validated is the Tropospheric Emission Spectrometer(TES) which is a high-resolution infrared-imaging Fourier transform spectrometer with spectral coverage of 3.2 to 15.4 µm at a spectral resolution of 0.025 cm -1 , dedicated to retrieve data simultaneouslly measurements of NOy, CO, O3, and H2O for use in the determination of the global distribution of OH, an oxidant of central importance in tropospheric chemistry. The other instruments to carry the intercomparison and validation were the Howard University Raman Lidar (HURL), which carries measurements of aerosol and water vapor retrievals, the Vaisala type 92 Radiosonde (RS92) and as reference due its absolute accuracy the University of Colorado Cryogenic Frostpoint Hygrometer (UC-CFH). The measurements were coordinated with the AURA overpasses over the Beltsville Site and given the window interval for the TES instrument. The average altitude reached by the radiosondes was 31 km, while the Lidar could reach about 15 km during the night. Results will be presented comparing the different techniques to TES water vapor retrievals.