1 / 14

Temporal and Spatial Variations of PM2.5 Mass in Georgia

Temporal and Spatial Variations of PM2.5 Mass in Georgia. EAS 6410 Spring 2007. Xiaolu Zhang. Introduction. PM2.5 : particulate matter with an aerodynamic diameter ≤ 2.5 µ m ( fine particle ) Formation: primary and secondary Precursors include SO 2 , NOx, NH 3 , VOC

leoma
Download Presentation

Temporal and Spatial Variations of PM2.5 Mass in Georgia

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Temporal and Spatial Variations of PM2.5 Mass in Georgia EAS 6410 Spring 2007 Xiaolu Zhang

  2. Introduction • PM2.5 : particulate matter with an aerodynamic diameter ≤ 2.5 µm ( fine particle ) • Formation: primary and secondary Precursors include SO2, NOx, NH3, VOC • Adverse effects: public health, poor visibility…

  3. PM 2.5 composition - Atlanta

  4. NAAQ Standards for PM2.5 • NAAQS: National Ambient Air Quality Standard • Annual PM2.5 standard: the annual arithmetic mean • concentration ≤ 15.0 µg/m3 • 24-hour PM2.5 standard: the 98th percentile 24-hour • concentration ≤ 65 µg/m3 • Non-attainment areas in Georgia ( 2004 )

  5. TOWNS F ANNIN CA TOOSA DADE RABUN MURRA Y UNION WHITFIELD W ALKER WHITE GILMER LUMPKIN HABERSHAM STEPHENS CHA TTOOGA GORDON PICKENS BANKS FRANKLIN DAWSON HART BARTOW HALL CHEROKEE FLOYD FORSYTH ELBERT MADISON JACKSON Atlanta Chattanooga Floyd County Macon POLK COBB BARROW GWINNETT CLARKE CLARKE P AULDING OGLETHORPE OCONEE WILKES DEKALB WALTON HARALSON LINCOLN DOUGLAS ROCK- DALE FULTON GREENE CLAYTON MORGAN T ALIAFERRO CARROLL McDU COLUMBIA NEWTON HENR Y FAYETTE W ARREN PUTNAM RICHMOND RICHMOND JASPER COWETA BUTTS SPALDING HEARD GLASCOCK HANCOCK PIKE LAMAR BURKE MONROE JEFFERSON MERIWETHER BALDWIN TROUP JONES W ASHINGTON UPSON BIBB SCREVEN BIBB HARRIS JOHNSON CRA WFORD JENKINS WILKINSON TWIGGS T ALBOT EMANUEL PEACH MUSCOGEE T A YLOR HOUSTON BLECKLEY MARION BULLOCH MACON LAURENS TREUTLEN CANDLER CHA TT A- EFFINGHAM HOOCHEE MONT - SCHLEY GOMER Y PULASKI DOOL Y WHEELER EV ANS TOOMBS STEW ART BR Y AN WEBSTER SUMTER CHA THAM WILCOX DODGE T A TTNAL CRISP TELF AIR QUITMAN LIBERTY TERRELL LEE JEFF LONG RANDOLPH BEN HILL DA VIS APPLING TURNER IRWIN McINTOSH COFFEE CLA Y CALHOUN WORTH BACON DOUGHERTY W A YNE TIFT BAKER PIERCE EARL Y BERRIEN A TKINSON GL YNN BRANTLEY COLQUITT MITCHELL MILLER W ARE COOK LANIER SEMINOLE THOMAS CAMDEN LOWNDES CLINCH CHARL TON BROOKS DECA TUR GRADY ECHOLS PM2.5 Nonattainment Areas

  6. ATHENS Urban Urban CONFDAVE GWINNETT Urban MCDONOUGH Rural Rural NEWNAN SDEKALB Urban WALTON Urban YORKVILL Rural AUGUSTA Urban COLUMBUS Urban MACON Urban SAVLA Urban Data Acquisition Georgia’s Ambient Monitoring Program (AMP)

  7. Sampling Method • Tapered Element Oscillating Microbalance (TEOM) • On-line measurement • Directly measures PM mass by measuring the changing weight of a filter as it accumulates particles • Is sensitive to humidity and temperature • Detection limit ~ 1.5 µg/m3

  8. PM spikes often driven by sulfate • PM2.5 mass strongly influenced by precipitation – negative impact (Rain) (Rain) 24h VS 1h avg. Metro Atlanta

  9. Atlanta vs Rural Yorkville, GA ~80 km west of Confed. Ave.

  10. Confed. Ave Yorkville Atlanta vs Rural 04/11/07 Most polluted day 04/07/07 Cleanest day

  11. Spatial Variation In Georgia • Highest concentration: Urban Atlanta, Savannah • Lowest concentration: Rural Atlanta, Athens • Similar pattern of curves

  12. Correlations with Metro Atlanta Concentration • High correlations with metro Atlanta PM2.5 are found for most sites. ( R2 > 0.7 ) • Similar weather condition is a possible reason of high correlations • Exception: Savannah

  13. Conclusion • Precipitation has a strong negative impact on PM2.5 mass concentration. • In urban site PM2.5 mass is significantly higher than in rural site. • Urban Atlanta and Savannah have the highest PM2.5 mass concentration while rural Atlanta and Athens have the lowest. • Most cities have high correlations with Atlanta in PM2.5 mass except for Savannah.

  14. Thanks !

More Related