Global Estimates of Ambient PM 2.5 Concentrations from Satellite AOD Aaron van Donkelaar with contributions from: Randall Martin, Brian Boys, Crystal Weagle, and Graydon Snider VIIRS Aerosol Science and Operational Users Workshop November 21-22, 2013
20
Embed
Global Estimates of Ambient PM 2.5 Concentrations from Satellite AOD Aaron van Donkelaar with contributions from: Randall Martin, Brian Boys, Crystal Weagle,
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Global Estimates of Ambient PM2.5 Concentrations from Satellite AOD
Aaron van Donkelaar
with contributions from:
Randall Martin, Brian Boys, Crystal Weagle, and Graydon Snider
VIIRS Aerosol Science and Operational Users Workshop
November 21-22, 2013
PM2.5 affects human health and longevity
Particulate Matter
Ground-level Ozone
Unsafe Water Supplyand Sanitation
Indoor Air Pollution
Malaria
0.0 1.0 2.0 3.0 4.0Deaths (millions of people) OECD, 2012
201020302050
• Life expectancy increases 7 months per 10 μg/m3 decrease in long-term exposure
• PM2.5 regulation achieved largest gains of all U.S. Federal Regulation
• Dominates global environmental mortality by 2030
Vast Regions Have Insufficient Measurements for Air Pollution Exposure Assessment
Locations of Publicly Accessible Long-Term PM2.5 Monitoring Sites
Monitor locations can be driven by compliance objectives
~1 site / 10,000 km2 in continental US & southern Canada
Emerging Network
Previous Global Burden of Disease Report for 2000Impaired by Insufficient Global Observations of Fine
Particulate Matter (PM2.5)
Estimate air pollution in urban areas causes:• ~1 million deaths (~1%)Could not estimate effects outside of urban areas for 2000 reportCould this be improved with satellite remote sensing?
Cohen et al., 2005
AOD is related to PM2.5…but how to separate surface aerosol from column concentrations?
Multiple approaches:• surface monitors calibration• empirical relations• model output
20 80 140
PM2.5 / AOD[μg/m3] GEOS-Chem v8-01-04
PM2.5 / AOD ratio is a function of:•vertical structure•aerosol type/hygroscopicity•meteorology
Significant agreement with coincident ground measurements over NA