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A ir Quality Research Branch Meteorological Service of Canada Environment Environnement Canada AURAMS Is “A Unified Regional Air-quality Modelling System” Episodic, regional, size-resolved, chemically- characterized PM modelling system “Unified’ in sense that it considers multiple air pollutants and can be applied to multiple AQ issues (e.g., PM, acid deposition, tropospheric O 3 ) Consists of 3 main components:  regional emissions processing system;  nonhydrostatic global meteorological model;  “off-line” sectional PM regional air-quality model Current PM resolution: 12 size bins (  m) and 9 chemical components (SO 4 =, NO 3 -, NH 4 +, BC, pOC, sOC, CM, SS, H 2 O)

Transcript of A ir Quality Research Branch Meteorological Service of Canada Environment Environnement Canada...

  • Western & Eastern AURAMS Domains

    Western Domain148 x 124 x 29 x=21 km

    Eastern Domain85 x 105 x 29 x=42 km

    PM2.5 SO4O3

    Air Quality Research BranchMeteorological Service of Canada

    Ground-Level O3, 1700 EDT, July 14th 1995Coloured Station Circles SuperimposedOn ContouredGridded Model Field,Same Colour Scheme

    Air Quality Research BranchMeteorological Service of Canada

    Hourly O3, All Stations, July 12-15, 1995Max. Observed: ~185 ppb

    Max. Predicted: ~150 ppb

    Air Quality Research BranchMeteorological Service of Canada

    24-Hour PM2.5 Species: July 8-16, 1995PM2.5 SO4 NH4 NO3NAPS Network,g m-3 @STP1-in-6

    Air Quality Research BranchMeteorological Service of Canada

    PM2.5 & O3 Time Series, Feb. 714, 1998PM2.5PM2.5PM2.5O3

    Air Quality Research BranchMeteorological Service of Canada

    Evaluation of Hourly O3 and PM2.5 Predictions, Feb. 7-14, 1998 Hourly O3Hourly PM2.5

    Air Quality Research BranchMeteorological Service of Canada

    24-Hour PM2.5 Species: Feb. 7-14, 1998NAPS Network,g m-3 @STP1-in-6

    Air Quality Research BranchMeteorological Service of Canada

    Satellite vs. GEM-Modelled Cloud Field Cloud Fraction, 3085 m AGL

    Air Quality Research BranchMeteorological Service of Canada

    Six-Day Precip-Weighted SO4= Conc. In Precip (July 31-Aug. 5, 1988)

    ModelledObserved

  • AURAMS Diagnostic Evaluation Pacific2001

    Air Quality Research BranchMeteorological Service of Canada

    Note: Red stations are less than 250 km from Pacific coast .Blue stations > 250 km from Pacific coast.Daily Speciated PM Comparison,Aug. 25-31, 2001

    (IMPROVE, CAPMoN, NAPS)PM2.5 SO4PMtot SO4PM2.5 NO3PMtot NO3PMtot NH4PM2.5 EC

    Air Quality Research BranchMeteorological Service of Canada

    Particle Size and SpeciationAMS data courtesy of Hacene Boudries, AerodyneSimilar range and size distributionShort duration peaks in model lower than measurements p-SO4Pacific2001 p-SO4 AMS Time-Size Cross Section

    Air Quality Research BranchMeteorological Service of Canada

    Langley, Aug. 29, 2001Lidar data courtesyKevin Strawbridge, MSCAURAMS captures the nighttime layer aloft detected by the lidarPacific2001 Lidar Time-Height Cross Section

    Air Quality Research BranchMeteorological Service of Canada

    Same-Day Evaluation of Real-Time Forecasts (1)

    Based on AIRNOW data feedSummer 2004 for O3 and PM2.5 ObsO - MModel

    Air Quality Research BranchMeteorological Service of Canada

    Same-Day Evaluation of Real-Time Forecasts (2)

    Air Quality Research BranchMeteorological Service of Canada

    Summary and Next StepsAURAMS is an episodic, regional, size-resolved, chemically-characterized PM modelling system that includes a sectional PM CTMOperational, diagnostic, and real-time performance evaluations have all provided useful insightsOlder cases provide point of comparison with other models (e.g., ADOM, RADM) while newer cases provide richer PM and PM precursor data sets for multi-pollutant evaluationsAdditional cases (e.g., Eastern Supersite 2001/02 period, ICARTT/NEAQS-2K4 period), longer simulations, more fields (e.g., precip chemistry), more model intercomparisons are being pursued

    Period

    Comments

    Aug. 1-6, 1988

    EMEFS field experiment

    July 7-15, 1995

    NARSTO-NE field experiment

    Feb. 4-15, 1998

    Winter episode in SE Canada

    Aug. 25-31, 2001

    Pacific2001 field experiment

    July 1, 2004 onward

    Experimental real-time run

    precip. SO4= (umol/L)

    0.0 to 0.1

    0.1 to 10.0

    10.0 to 20.0

    20.0 to 30.0

    30.0 to 60.0

    60.0 to 120.0

    120.0 to 530.0

    Modelled

    Observed

    0800 July 31 - 0800 August 6 (EDT)

    Model Feature

    CMAQ

    AURAMS

    Met Driver

    MM5 or ETA

    GEM

    Map Projection

    Lambert

    conformal

    Polar

    stereographic

    Gas-Phase

    Chem

    CB4, RADM2, SAPRC

    ADOM-II

    PM Size Distribution

    Modal (3 modes)

    Sectional (12 bins)

    PM Composition

    8 components

    9 (including SS)

    PM Processes

    emissions, nucleation, condensation,

    coagulation, sedimentation, cloud processing

    Aqueous-Phase

    Chem

    RADM?

    ADOM

    Heterogeneous

    Chem

    MARS, ISORROPIA

    ISORROPIA, HETV

    Period

    AQ Data Sets

    Aug. 1-6, 1988

    EMEFS field data

    July 7-15, 1995

    IMPROVE, NAPS, CAAMP,

    GAViM

    Feb. 4-15, 1998

    IMPROVE, NAPS,

    GAViM

    Aug. 25-31, 2001

    IMPROVE, NAPS, field data

    July 1, 2004 onward

    AIRNOW O

    3

    and PM

    2.5

    precip. SO4= (umol/L)

    0.0 to 0.1

    0.1 to 10.0

    10.0 to 20.0

    20.0 to 30.0

    30.0 to 60.0

    60.0 to 120.0

    120.0 to 350.0

    Modelled

    Observed

    0800 July 31 - 0800 August 6 (EDT)