Trend of a single category estimated as emission factor times an activity rate

Source 1

Source 1

Activity

Activity

data

data

Base Year

Year t

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find pdf

Emission Base Year = Emis. Factor x Activity

Emission Year t = Emis. Factor x Activity

Emission Year t = Emis. Factor x Activity

Trend = (Emission Year t -Emission in Base Year) / Emission in Base Year

Source 1

Source 1

Source 1

Source 1

Emission

Emission

Activity

Activity

factor 1

factor 1

data

data

Base Year

Year t

Base Year

Year t

find pdf

find pdf

find pdf

find pdf

Emission Base Year = Emis. Factor x Activity

Emission Base Year = Emis. Factor x Activity

Emission Year t = Emis. Factor x Activity

Emission Year t = Emis. Factor x Activity

Trend = (Emission Year t -Emission in Base Year) / Emission in Base year

Trend = (Emission Year t -Emission in Base Year) / Emission in Base year

Case where the emission factor is 100% correlated between base year and year t (e.g., the same emission factor is used in each year and there is no year to year variation expected )

Case where the emission factor is not correlated between in base year and year t (e.g., emission factor for coal where fuel varies from year to year or where technologies change )

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