Phoenix Metropolitan Area Urban Nephelometer Program
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Phoenix Metropolitan Area Urban Nephelometer Program Mike Sundblom Arizona Department of Environmental Quality April 13, 2005
description
Phoenix Metropolitan Area Urban Nephelometer Program. Mike Sundblom Arizona Department of Environmental Quality April 13, 2005. Network History. Phoenix Urban Haze Program - PowerPoint PPT Presentation
Transcript of Phoenix Metropolitan Area Urban Nephelometer Program
Phoenix Metropolitan Area Urban Nephelometer
Program
Mike Sundblom
Arizona Department of Environmental Quality
April 13, 2005
Network HistoryNetwork History
Phoenix Urban Haze ProgramPhoenix Urban Haze Program Network began in early 1990’s with 1 Network began in early 1990’s with 1
transmissometer path, 1 nephelometer at JLG transmissometer path, 1 nephelometer at JLG Supersite, and a network of Dichotomous PmSupersite, and a network of Dichotomous Pm10/fine10/fine samplerssamplers
Expanded in 2003 through a recommendation from Expanded in 2003 through a recommendation from the 2000 Governor’s Brown Cloud Summitthe 2000 Governor’s Brown Cloud Summit
Expansion included: Expansion included: 3 nephelometers3 nephelometers
1 transmissometer path1 transmissometer path
4 camera systems4 camera systems
Website – www.phoenixvis.netWebsite – www.phoenixvis.net
Locations and EquipmentLocations and Equipment
Purpose and UsePurpose and Use
Track Long Term Visibility Trends in Track Long Term Visibility Trends in Urban AreaUrban Area
Report Visibility Parameters to the Public Report Visibility Parameters to the Public (Phoenix area Visibility Index)(Phoenix area Visibility Index)
AIRNOW Reporting of PM2.5AIRNOW Reporting of PM2.5
PM2.5 Forecasting PM2.5 Forecasting
AIRNOW Reporting AIRNOW Reporting
How does Arizona report nephelometer How does Arizona report nephelometer (Bscat) as PM2.5?(Bscat) as PM2.5? A relation between nephelometer Bsp and A relation between nephelometer Bsp and
PM2.5 reference measurement needed PM2.5 reference measurement needed EPA funded this work in 2003 at two urban EPA funded this work in 2003 at two urban
locations – Phoenix and Tucsonlocations – Phoenix and Tucson Work conducted by Battelle (Work conducted by Battelle (David Wendt and David Wendt and
Nancy McMillan)Nancy McMillan)
AIRNOW ReportingAIRNOW Reporting
FRM PM2.5 DataFRM PM2.5 Data All data is from the Phoenix SupersiteAll data is from the Phoenix Supersite Obtained from AQSObtained from AQS 161 observations during 2002161 observations during 2002
Daily from January 1 through March 31Daily from January 1 through March 31
Every sixth day from April 1 through May 7Every sixth day from April 1 through May 7
Every third day from May 8 through December 31Every third day from May 8 through December 31
AIRNOW ReportingAIRNOW Reporting
Dichot dataDichot data All data from Phoenix SupersiteAll data from Phoenix Supersite Included fine, coarse, and total PM – analysis Included fine, coarse, and total PM – analysis
focused on fine. focused on fine. 45 Observations during 200245 Observations during 2002
February 2 to December 28 February 2 to December 28
Data only every six daysData only every six days
AIRNOW ReportingAIRNOW Reporting
Nephelometer DataNephelometer Data Obtained from IMPROVE websiteObtained from IMPROVE website 2002 Data from Phoenix Supersite 2002 Data from Phoenix Supersite Hourly measurements of Bsp and relative Hourly measurements of Bsp and relative
humidity averaged to provide daily humidity averaged to provide daily observationsobservations
AIRNOW ReportingAIRNOW ReportingIndividual hourly nephelometer measurements Individual hourly nephelometer measurements transformed to FRM-like using the equation:transformed to FRM-like using the equation:
2RelHum*0001.0RelHum*0053.0)BSP*log(8328.06041.0likeFRM e
Nephelometer Nephelometer (FRM-Like)(FRM-Like)
DichotDichot FRMFRM
Nephelometer Nephelometer (FRM-Like)(FRM-Like)
1.001.00 0.780.78 0.890.89
DichotDichot 0.780.78 1.001.00 0.950.95
FRMFRM 0.890.89 0.950.95 1.001.00
Correlation (R)
AIRNOW ReportingAIRNOW Reporting
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PM2.5 Nephelometer Dichot FRM
January-June 2002
Battelle
AIRNOW ReportingAIRNOW Reporting
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PM2.5 Nephelometer Dichot FRM
July-December 2002
Battelle
Nephelometer Sites Reported to Nephelometer Sites Reported to AIRNOWAIRNOW
Data ComparisonData ComparisonComparison of FDMS TEOM and PM2.5 NEPH
Phoenix Supersite Dec 1- 4, 2004
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12/3
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RH FDMS Neph2.5 BAM PM2.5
Data ComparisonData Comparison
Phoenix Supersite Phoenix Supersite
December 2, 2004 December 2, 2004
24-Hr PM2.5 Concentrations (µg/m3)24-Hr PM2.5 Concentrations (µg/m3)
PM2.5 NephPM2.5 Neph FDMS TEOMFDMS TEOM PM2.5 BAMPM2.5 BAM FRM (Filter)FRM (Filter)
23.923.9 27.127.1 26.626.6 28.128.1
AIRNOW ReportingAIRNOW Reporting
Limitations….Limitations….
Questions?Questions?
