NO X Chemistry in CMAQ evaluated with remote sensing Russ Dickerson et al. (2:30-2:45PM) University of Maryland AQAST-3 June 13, 2012 Madison, WI The MDE/UMD.

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Presentation transcript:

NO X Chemistry in CMAQ evaluated with remote sensing Russ Dickerson et al. (2:30-2:45PM) University of Maryland AQAST-3 June 13, 2012 Madison, WI The MDE/UMD RAMMPP Team. 1

Outline NO 2 from OMI, DISCOVER-AQ and CMAQ – Concentrations & Trends – Urban/rural – Profiles GRIPS: Geostationary Remote Infrared Pollution Sounder Am Chem Soc MARM meeting session May

Slide prepared by Clare Flynn, UMD PhD Candidate, AOSC DISCOVER AQ Ground, model, air and satellite comparisons at a single location 3

CEMS Emission (point sources) Trends NO x NO x : Large decrease after SIP call in 2003; OH/PA/WV  only scrub NO x during ozone season until January 2009; further decrease for all states after Hao He. 4

End summer only controls 5 Thanks T. Canty

DOMINO v2 (OMI Satellite Obs.) CMAQ Tropospheric Column 0.25 o x 0.25 o AQ SIP modeling July 2007 Recent (n-1) version of CMAQ Considers 2007 emissions/met. Fields DOMINO v2 satellite retrieval Model – lower than satellite in rural areas??? higher than satellite in urban regions Major Policy Implication; lightnig not enough (T. Canty)

Altitude (km) NO 2 (ppbv) Aircraft (UMD Cessna) data provide both regional information and vertical structure of pollutants AM data / upwind / rural PM data / downwind / urban 7 Thanks J. Stehr, L. Brent

Papers Pending Profiles of NO 2 from DISCOVER-AQ, Brent et al. Emissions fingerprints for Asia, North America…. Streets et al., CMAQ vs. observed NO 2 profiles, Canty et al., GASP observations and PM2.5, Stehr et al. 8

Proposal submitted to NASA EV-I 9

GRIPS Quad – Telescope Design Three Pressure Levels P=0 P=P 2 P=P 1 P=P 3 Front View Gas cells with pressures P 1, P 2, P 3 and 0. Gas Cell Optics Empty Cell Optics Detectors Filter SideView Optics 10 M. Schoeberl

GRIPS Quad- Telescope Detailed Design 11

Top View Quad telescope bundles O 2 : 0.76 µm CO: 2.33 µm CO: 4.64 µmCO 2 : 2.05 µm CH 4 : 2.28 µm N 2 O: 3.88 µm Gimbal 2.3 ft 2.5 ft 1.5 ft Gimbal GRIPS External Multi-Telescope Design 12

Carbon Monoxide from GEO Methane from GEO GRIPS Fingerprints, Asia ResidentialVehiclePower GRIPS CO 2 / CO Industry GRIPS + GEMS Biomass Emission Ratios Ratios of trace gases provide unique fingerprints that can help us identify emission sources. GRIPS can distinguish pollution sources using CO 2 / CO and CO 2 / CH 4 ratios. Augmenting GRIPS with data from a UV/Vis spectrometer such as GEMS will allow further categorization. For example, with SO 2 and NO 2 measurements we can further distinguish sources. GRIPS Geostationary Remote Infrared Pollution Sounder 13

Thank You Conclusions 1.NO 2 Concentrations from OMI are in reasonable agreement with aircraft columns and Pandora. 2.Both remote and in situ observations reflect impressive downward trends. 3.The urban/rural ratio is smaller in observations than in CMAQ. 4.Emissions can be evaluated with proposed remote sensing instruments. 14

Instrument Overview GRIPS employs the well-tested gas filter correlation radiometry (GFCR) technique, used successfully by HALOE, MOPITT, and other satellite instruments. Solar reflected and thermal IR radiation is filtered through gas- cells at different pressures. The gas filters provide superior spectral resolution, and can separate the signature of the measurement gas at different altitudes (see figure below). GRIPS will provide boundary layer, mid-tropospheric, and total column concentrations of CO, CO 2 and CH 4 over the entire Asian continent with 8 km nadir resolution. To measure each species, light is collected by a 4-telescope bundle hosting gas cells at different pressures. The 4 beams are focused on a cooled HgCdTe detector array. One bundle each is used for CH 4, CO 2, N 2 O and O 2. CO requires two bundles. The O 2 and N 2 O measurements are for mitigating effects of aerosols, clouds and surface pressure variations. The bundles can be configured to fit the available space, and one possible configuration is shown here on the pointing gimbal 45 cm GRIPS Geostationary Remote Infrared Pollution Sounder GRIPS Instrument Mass: 38 kg Power: 23 W Data Rate: 5 Mb/s Volume: 0.13 m 3 GRIPS Instrument Mass: 38 kg Power: 23 W Data Rate: 5 Mb/s Volume: 0.13 m 3 15