civic exchange 2009 the air we breathe conference - progress in emission inventories of pearl river...
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Civic Exchange 2009 The Air We Breathe Conference - Experts Symposium 9 January 2009 Progress in Emission Inventories of Pearl River Delta Region presented by Dr Allen Zheng (South China University of Technology) http://air.dialogue.org.hkTRANSCRIPT
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Progress in Emission Inventories ofPearl River Delta Region
Junyu (Allen) Zheng, Ph.DSouth China University of Technology
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Context: Emission Inventory
Air pollutant emission inventories arefundamental information for: emission trend characterization emission budgeting for regulatory and
compliance purposes assessment of pollution control strategies predication of ambient pollutant concentrations
and health effect emission trading
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2000:The first EI of PRD for 1997
2002:The second EI of PRD for 2001
2003:Developing the EI manual of PRD
jointly by GDEMC and HKEPD
2005~2007: Developing and reviewing
the EI of 2003 using the EI manual
2008: GDEPD and HKEPD publicly released
the 2003-based EIs in the PRD
History in Emission Inventories in PRD
Source: Prof. Liuju Zhong
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Limitations in PRD Emission Inventories
Lack of localized emission factorsDifficulties in activity data collectionHigh uncertainty less work in the spatial, temporal allocation
and chemical speciation
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Newest Available Emission Inventories in PRD
Base Year: 2006
Pollutants: SO2, VOC, NOX, PM10, PM2.5, CO
Source Categories Power plants Industrials sources Mobile sources VOC products sources Biogenic sources Other sources
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Spatial Distribution of SO2 Emissions
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Spatial Distribution of NOx Emissions
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Spatial Distribution of PM10 Emissions
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Spatial Distribution of VOC Emissions
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Key Findings in PRD Emission Inventories
About 51.4% of SO2 from power plants, 39.9%from industrial sources, and 8.8% from othercategories
41.6 % of NOx emissions were contributed bypower plants, 46% from mobile sources, and12.4% from others.
The industrial, mobile and power plant sourcesare major contributors for PM10 and PM2.5emissions, accounting for 52.6%, 22.3%, and22.8% for the total PM10 emissions and 40.8%,36.2%, and 20.4% for the PM2.5, respectively
Mobile source is the largest contributorresponsible for the 39.9%, and biogenic and VOCproduct-related sources accounting for 24.5% and23.6% of the total VOC emissions in the region
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Key Findings in PRD Emission Inventories
There is relatively low uncertainty in SO2 emissionestimates
Medium to high uncertainty for the NOx emissions, highuncertainty for the NOx emissions are mainly from on-roadand non-road mobile source categories.
High uncertainties exist in the VOC, PM2.5, PM10 andCO emissions due to lack of key representative emissionfactors and large uncertainty in activity data. On-roadmobile, VOC product-related and biogenic sources are keycontributors to the high uncertainty in VOC emissions
Industrial and on-road mobile sources are mainuncertainty sources for leading to high uncertainty inPM10 and PM 2.5 emission estimates.
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Future PRD Inventory Improvement
Enhancement of local emission factordevelopment and proper classification andcollection of activity data.
Improving estimates of emissions from mobilesources will greatly increase the accuracy of NOx,VOC, CO,PM10 and PM 2.5 emission estimates inthe PRD region.
The industrial sources, especially for nonmetallicmineral products industry, should be prioritized forimproving the estimates for PM2.5 and PM10emissions.
Enhancement of collection of activity data for theVOC-related product sources will be helpful forimproving VOC emission estimates.
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Future PRD Inventory Improvement
More work are needed for improvingtemporal and spatial allocations
An open data sharing policy amongdifferent parties will be another importantway to improve the PRD regional emissioninventory.
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