NOAA/CMDL/Mauna Loa Observatory AIRS Validation Water Vapor - - PowerPoint PPT Presentation

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

2 4 6 8 10 12 14 20 40 60 80 100 120

Humidity

Altitude (km) MLO, 3.4 km 00/10/04 Lidar 00/10/04 Sonde

2 4 6 8 10 12 14 1 2 3 4 5

Backscatter Rati

• (1 0 6 4

nm )

Altitude (km) MLO, 3.4 km 00/10/04 Lidar, approximate optical depth

• f cirrus cloud = 0.001 at 1064 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

2 4 6 8 10 12 14 10 100 1000 10000

Water Vapor (ppm)

Altitude (km)

MLO, 3.4 km 00/10/04 Lidar 00/10/04 -Std. Dev. 00/10/04 +Std. Dev.