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Satellite Basics MAC Smog Blog Training CATHALAC, Panama, Sept 11-12, 2008. Jill Engel-Cox & Erica Zell Battelle Memorial Institute engelcoxj@battelle.org, 703-875-2144 zelle@battelle.org, 703-236-1420. U.S. Ambient Air Monitoring. National Ambient Air Quality Standards

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Satellite basics mac smog blog training cathalac panama sept 11 12 2008

Satellite BasicsMAC Smog Blog TrainingCATHALAC, Panama, Sept 11-12, 2008

Jill Engel-Cox & Erica Zell

Battelle Memorial Institute

engelcoxj@battelle.org, 703-875-2144

zelle@battelle.org, 703-236-1420


U s ambient air monitoring
U.S. Ambient Air Monitoring

  • National Ambient Air Quality Standards

    • Carbon monoxide, lead, nitrogen dioxide, sulfur oxides, particulate matter (PM10 and PM2.5), and ozone

  • Typical Real-time Monitors

    • Hourly Ozone (ppb)

    • Hourly PM2.5 (g / m3)

  • Converted to health-based air quality index (AQI)

  • Available on U.S. Environmental Protection Agency’s AIRNow website (http://www.airnow.gov)


Key nasa air quality satellite sensors
Key NASA air quality satellite sensors

Moderate Resolution Imaging Spectroradiometer (MODIS)




Satellite data available for air quality
Satellite Data Available for Air Quality

  • Most useful for particulate matter (PM)

  • Type of information relevant to PM:

    • True Color (Red, Green, Blue - RGB) - looks like a photograph but is data, shows haze, dust, & smoke

    • Aerosol Optical Depth (AOD) - Non-dimensional measure of total column (satellite-ground) extinction

  • Limited but improving information on ground-level ozone, SO2, CO, vertical distribution of PM

  • All data is “free”, available globally


Modis true color image 6 july 2002
MODIS True Color Image6 July 2002

Engel-Cox, J. et.al. 2004. Atmospheric Environment.


Transport case study illustration modis rgb l1b image 25 june 2002
Transport Case Study Illustration MODISRGB L1B Image25 June 2002

Haze

Cloud

Sunglint

Data provided by NASA Goddard Space Flight Center. Image processed by Battelle using MODIS HDF Look.


Modis aerosol optical depth 25 june 2002
MODIS Aerosol Optical Depth25 June 2002

Data provided by NASA Goddard Space Flight Center. Image processed by Battelle using MODIS HDF Look.


Relation to ground based data

Relation to Ground-based Data

Aerosol Optical Depth (AOD) vs. PM2.5 (Ground)


Quantitative analysis pm 2 5 concentrations vs modis aod

120

105

90

75

60

45

30

15

0

Quantitative Analysis: PM2.5 Concentrations vs. MODIS AOD

STN-M Site Locations

Eastern U.S., April-September 2002

PM2.5(μg/m3)= 23 AOD + 7

N=14,000

PM2.5 (μg/m3)

IMPROVE Site Locations

0.0

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

Aerosol Optical Depth (unitless)

Engel-Cox, J. et.al. 2004. Atmospheric Environment.


Satellite basics mac smog blog training cathalac panama sept 11 12 2008

Engel-Cox, J. et.al. 2004. Atmospheric Environment.


Initial correlations by season daily fine mass
Initial Correlations by SeasonDaily Fine Mass

Winter

Summer

Spring

Fall


Baltimore md summer 2004

Old Town TEOM

MODIS AOD

Baltimore, MDSummer 2004

July 21

Mixed down smoke

July 9

High altitude smoke

Aug 24

Transported haze

Aug 10

Normal haze

PM2.5 (g/m3)

MODIS Aerosol Optical Depth



Aerosol optical depth aod idea http idea ssec wisc edu
Aerosol Optical Depth (AOD)IDEA:http://idea.ssec.wisc.edu/


Satellite basics mac smog blog training cathalac panama sept 11 12 2008
MesoAmerica Aerosol Optical Depth from MODISSundar A. ChristopherThe University of Alabama in Huntsville

  • Weekly Composites of MODIS Aerosol Terra Optical Depth for 2007

  • Weekly Composites from one satellite provides increases spatial coverage

  • Further work will use data fusion approaches to combine both Terra and Aqua to fill in the gaps.