Summer 2015 Ozone Lidar Observa6ons at Beltsville, MD During Several Air Quality Episodes
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1 Summer 2015 Ozone Lidar Observa6ons at Beltsville, MD During Several Air Quality Episodes Dr. John Sullivan Thomas McGee, Anne Thompson, Raymond Hoff, Grant Sumnicht, Laurence Twigg Tues Dec. 15, 2015 Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 1
2 Layout Introduc6on to TOLNET/GSFC Ozone Lidar Hardware Descrip6on/Valida6on DISCOVER- AQ (Colorado 2014) Case studies (Strat. Intrusion, upslope flow) Beltsville, MD Highlights (2015) Case studies (Aq observa6ons, strat. Intrusion) Future Plans/Outlook Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 2
3 TOLNet h`p://www- air.larc.nasa.gov/missions/tolnet/ Env. Can. Ground based ozone lidar network consis6ng of 6 sta6ons funded ini6ally in 2011 Emphasis on satellite retrieval improvements in future satellite missions (TEMPO, GEOCAPE) Cooper et. al (2015) a lower ozone standard will mo6vate air quality control planners to seek more accurate and precise a`ribu6on of observed ozone to local, upwind, and stratospheric sources of ozone to determine how much domes6c emissions must be reduced in order to a`ain that standard Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 3
4 GSFC TROPOZ DIAL Developed throughout 2013 Mul6ple telescopes for maximum al6tude coverage Operate in UV wavelengths Day6me and nighfme opera6on Sullivan et al. Mobile Tropospheric Ozone Lidar in Balt- Wash D.C Region, Atmos. Meas. Tech Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 4
5 GSFC TROPOZ DIAL on off Use wavelengths to maximize absorp6on cross sec6on on and off Recording the backsca`er signal at each wavelength Calculate range in discrete bins Sullivan et al. Mobile Tropospheric Ozone Lidar in Balt- Wash D.C Region, Atmos. Meas. Tech Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 5
6 GSFC TROPOZ DIAL Difference in absorp6on Derive ozone number density from return signals Use met. variables from model/sonde to calculate mixing ra6o Calculate range in discrete bins Correct for aerosols Sullivan et al. Mobile Tropospheric Ozone Lidar in Balt- Wash D.C Region, Atmos. Meas. Tech Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 6
7 Valida6on Efforts Intercomparison was performed with the Langley Mobile Ozone Lidar at Hampton, VA. Overall results indicate both lidars are repor6ng ozone concentra6ons within 10% from nearby ozonesondes First quan6ta6ve intercomparison between two ozone lidars within the U.S. Sullivan et al. Ozone Lidar Intercomparison: New Mobile Tools for Atmos. Research, J. Atmos. Oc. Tech A retrieval valida6on experiment was simulated Method uses synthe6c lidar return signals to confirm accurate ozone concentra6ons and determine bias Sullivan et al. OpRmizing Ozone Lidar With SyntheRc Signals and Ozonesondes, Atmos. Meas. Tech Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 7
8 Highlights from the NASA DISCOVER- AQ Campaign Ft. Collins, CO July- Aug 2014 Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 8
9 DISCOVER- AQ Campaign Deriving Informa6on on Surface Condi6ons from Column and Ver6cally Resolved Observa6ons Relevant to Air Quality (DISCOVER AQ) NASA AERONET TROPOZ Pandora Met/O3 MPL Photo Courtesy: L. Twigg Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Ozonesondes Slide 9
10 ALTITUDE [m ASL] Stratospheric Intrusions GSFC TROPOZ DIAL 06 Aug :20 22:30 UTC 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 TIME [UTC] Stratospheric filament entering troposphere associated with high ozone verified with lidar [ppbv] Sullivan et al. Characterizing STE using high- resoluron observarons, J. Geophysical Res. Atmospheres Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide Local Noon = 18 UTC
11 Upslope Flow Effects ALTITUDE [m ASL] a GSFC TROPOZ Ft. Collins, CO 22 Jul :30 04:00 UTC :00 20:00 21:00 22:00 23:00 00:00 01:00 02:00 03:00 04:00 [ppbv] P3B Spiral Local Noon = 18 UTC TIME [UTC] Ozonesonde Increased ozone concentra6ons at mountain- top al6tudes indica6ng terrain- drive air quality effects Sullivan et al. Ozone enhancements from Upslope Flow Events, J. Geophysical Res. Atmospheres. (in prep). Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 11
12 Highlights from Observa6ons at Beltsville, MD Jun- Aug 2015 Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 12
13 Deployment to Beltsville Deployed to Howard University Beltsville Center for Climate System Observa6on, a NASA University Research Center Met/O 3 Ceilometer MDE TROPOZ Ozonesondes Deployed from June October 2015, operated roughly 200 hours in support of MDE AQ forecasts Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 13
14 ALTITUDE [m ASL] Ozone Exceedance Smoke? Ozonesonde GSFC TROPOZ DIAL Beltsville, MD 11 Jun 10:00 to 12 Jun :00 EST Well mixed ppbv ozone in PBL GSFC Ozone Lidar Beltsville, MD 06/11/15 10:30 am 05:00 am EST Surface Monitor Residual Ozone Layer 12:00 15:00 18:00 21:00 00:00 03:00 TIME [EST] Well- mixed and polluted PBL observed at Beltsville, MD (stay tuned for Joel s talk aoerwards for more ) Dreessen et al. Impacts on Wildfire Smoke and Ozone in MD, J. Air & Waste Mgmt (submi[ed). Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide [ppbv]
15 Late Season Exceedance 2500 GSFC TROPOZ DIAL Beltsville, MD 16 Sep :30 02:30 21:30 UTC ALTITUDE [m ASL] :30 17:30 19:30 Well- mixed and polluted (>80 ppbv) PBL observed at Beltsville, MD episode during September [ppbv] Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 15
16 Nov. Stratospheric Event GSFC TROPOZ DIAL Beltsville, MD 16 Sep 2015 Nov. 23, 15:30 17:30 23:00 02:30 UTC UTC ALTITUDE [m ASL] :30 19:30 21:30 Stratospheric filament descending over Maryland in November with high ozone [ppbv] Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 16
17 Near Field Product 500 GSFC TROPOZ DIAL Beltsville, MD 16 Sep :30 02:30 UTC ALTITUDE [m AGL] :00 21:00 00:00 TIME [UTC] [ppbv] Ozone retrievals below 100 m AGL using improved hardware with the TROPOZ (personal best!) Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 17
18 Future Plans/Outlook Currently interested in collabora6ng with local and regional air quality managers/agencies Can provide nearly con6nuous ozone profiles during day6me and nighfme Poten6ally recruit other TOLNet lidars for study period Research Interests: Chesapeake Bay coastal terrain driven AQ effects Urban vs. Rural ozone produc6on Transboundary studies (within PBL and aloo) Impacts of stratospheric ozone on surface budget Thanks! Ques6ons? Contact: John Sullivan - NASA GSFC, john.t.sullivan@nasa.gov Slide 18
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