2005 Emission Inventory
alessandra
11:40 09/05/2017	

Table of Contents
2005 Emission Inventory 	 # 
Aggregated pollution indicators 	 # 

2005 Emission Inventory
Methodology
Typologies of atmospheric pollutant sources
Pollutants
Aggregated pollution indicators
Classification of activities (SNAP 97)
”Top-Down” and “Bottom-Up”
Spatial disaggregation of emissions
Temporal modulation of emissions
Data sources
Emission factors
Uncertainty
Work in progress

Aggregated pollution indicators
In the Emission Inventory data for some aggregated pollution indicators are available, obtained from combination of the emission data of single pollutants.
CO 2eq: total emissions of greenhouse gases expressed as CO 2 - equivalent
Tot. acidif. (H+): total emissions of acidifying substances
Precurs. O 3: total emissions of ozone precursors
CO 2eq: total emissions of greenhouse gases expressed as CO 2 - equivalent
”CO 2eq” emissions represent total emissions of greenhouse gases, weighted basing on their own contributions to greenhouse gas effect.
The estimate of greenhouse gases aggregated emissions is based on the following relation:
CO 2eq = Σ iGWP i x E i
where
CO 2eq  = CO 2 equivalent emissions in kt/year
GWP i  = “Global Warming Potential”, IPCC coefficients equal to 1, 0.021 and 0.31 respectively for CO 2, CH 4 and N 2O (IPCC, 2001)
E i  = CO 2 (in kt/y), CH 4 and N 2O (in t/y) emissions.
Example:
If CO 2 emissions are 100 kt/y, CH 4 emissions 50 are t/y and N 2O emissions are 10 t/y, then CO 2eq emissions are:
CO 2eq = 100 * 1 kt/y + 0.021 * 50 kt/y + 10 * 0.31 kt/y = 104.2 kt/y.
Tot. acidif. (H+): total emissions of acidifying substances
”Tot. acidif. (H+)” emissions represent total emissions of substances able to contribute to rain acidification.
The estimate of aggregated emissions of acidifying substances is based on the following relation:
Tot.acidif. (H+) = Σ i AP i x E i /1000
where
Tot. acidif. (H+) = total emissions of acidifying substances expressed as kt/y of H+ equivalents
AP i  = acidifying potential factors, equal to 31.25, 21.74 and 58.82 respectively for SO 2, NO x and NH 3 (De Leeuw et al., 2002)
E i  = SO 2, NO x and NH 3 (in t/y) emissions
Example
If SO 2 emissions are 10 t/y, N 2O emissions are 50 t/y, NH 3 emissions are 1 t/y, then Tot. acidif. (H+) emissions are:
Tot. acidif. (H+) = (31.25 * 10 t/y + 21.74 * 50 t/y + 58.82 * 1 t/y)/1000 = 1.46 kt/y.
Precurs. O 3: total emissions of ozone precursors
”Precurs. O 3” emissions represent total emissions of pollutant substances able to promote the formation of tropospheric ozone.
The estimate of aggregated emissions of ozone precursors is based on the following relation:
Precurs. O 3 = Σ iTOPP i x E i
where
Precurs. O 3  = emission of ozone precursors in t/y
TOPP i  = “Tropospheric Ozone Formation Potentials”, formation coefficients of tropospheric ozone, equal to 1.22, 1, 0.014 and 0.11 respectively for NO x, VOC, CH 4 and CO (De Leeuw et al., 2002)
E i  = NO x, VOC, CH 4 and CO emissions (in t/y).
Example
If NO x emissions are 10 t/y, NMVOC emissions are 5 t/y, CH 4 emissions are 5 t/y and CO emissions are 50 t/y, then Precurs. O 3 emissions are:
Precurs. O 3 = 1.22 * 10 t/y + 1 * 5 t/y + 0.014 * 5 t/y + 0.11 * 50 t/y = 22.77 t/y.
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