NOAA/CMDL/Mauna Loa Observatory AIRS Validation • Water Vapor Profiles by Raman Lidar (night) and radiosondes • Temperature Profiles by Lidar (night) and radiosondes • Ozone Profiles by Ozonesondes • Total Ozone by Dobson Spectrophotometer (day)
NOAA/Mauna Loa Observatory
MLO Aerosol/Temperature/Water Vapor Lidar Laser: Nd:YAG (532 nm, 1064 nm, 20 Watts each) Mirrors: 61 cm (532), 61 cm (1064), 74 cm (607 and 660)
2000/10/4 Observation 14 14 12 12 10 10 MLO, 3.4 km Altitude (km) Altitude (km) 8 00/10/04 Lidar, approximate optical depth 8 of cirrus cloud = 0.001 at 1064 nm MLO, 3.4 km 00/10/04 Lidar 6 6 00/10/04 Sonde 4 4 2 2 0 0 0 20 40 60 80 100 120 1 2 3 4 5 Humidity Backscatter Rati o (1 0 6 4 nm )
Lidar Calibration and Validation • Five frost-point hygrometers will be flown simultaneous with lidar measurement for calibration of the lidar • At least 14 measurements of water vapor and temperature made during overpasses each year for validation
Radiosonde and Ozonesonde validations • Seven radiosondes from the observatory for humidity and temperature each year • Seven launches of ozonesondes during daytime overpasses for humidity, temperature and ozone each year • The total daytime column ozone will be measured by Dobson spectrophotometer during daytime overpasses
2000/10/4 Observation 14 12 10 Altitude (km) 8 MLO, 3.4 km 6 00/10/04 Lidar 00/10/04 -Std. Dev. 4 00/10/04 +Std. Dev. 2 0 10 100 1000 10000 Water Vapor (ppm)
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