Sub-hourly Variation of Tropospheric Ozone Profiles Measured by the Huntsville DIAL Shi Kuang 1, John Burris 2, M. J. Newchurch 1, Steve Johnson 3, and.

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Presentation transcript:

Sub-hourly Variation of Tropospheric Ozone Profiles Measured by the Huntsville DIAL Shi Kuang 1*, John Burris 2, M. J. Newchurch 1*, Steve Johnson 3, and Stephanie Long 4 1 Atmospheric Science Department, University of Alabama in Huntsville, 320 Sparkman Dr., Huntsville, Alabama 35805, USA 2 NASA-Goddard Space Flight Center, Code 694, Greenbelt, Maryland 20771, USA 3 NASA-Marshall Space Flight Center, Office Code VP61, Huntsville, Alabama 35812, USA 4 Department of Physics, University of Alabama in Huntsville, Huntsville, Alabama 35805, USA

The Team Photo: Front: (left to right) Whitney Guerin, Stephanie Long, Shi Kuang. Back: (left to right) John Burris, Mike Newchurch, Steve Johnson

Outline Instrument description. Aerosol corrections. Validation against balloon sondes. Data Conclusions.

Dye Laser

The Instrument

Instrument Characterization Telescope’s performance validated. PMT response function and SIN correction determined. LED test - quantified electronic system response. Established system reliability. Mini receiver installed. LICEL (analog/photon counting) units replaced MCS boards (photon counting).

Typical statistical errors for day and nighttime ozone retrievals on the high and low altitude channels

Validation of DIAL ozone using balloon sondes (8AM) All sondes are launched at 1pm except one at 8am. Low channel works a little better than high channel. High channel has a oscillation above laser doesn’t have power. High statistical error and SIB error at 7-8 km relatively.

The mean and standard deviation of the ozone retrieval in last slide.

August 9-10, 2008

August 17-18, 2008

Oct. 5, 2008 Nighttime Ozone Enhancement Similar aerosol and O3 time-height structures suggest a same pollutant source.

8-hour peak Air Quality Index for ozone at Mississippi/Alabama region in October 2008 This was Sat.!

Horizontal Transport 24-hr Backtrajectories at 500, 1500 and 4000m for the nighttime ozone enhancement event observed in Huntsville on Oct. 5, 2008.

October 18, 2008

Conclusions RAPCD DIAL instrument is retrieving excellent lower tropospheric data. Retrievals with aerosol correction have a verified accurate of 5-20% between 1-8 km. 24-hr 10-min curtain plots shows many interesting trop O 3 features in time and space.