expand on expand on the Uncertainty sources of the Uncertainty sources of uncertainty in range uncertainty uncertainty range uncertainty your data in your data The GHG emission on this scope is calculated by multiplying the energy consumption The main described in source of the electricity emissions on bill or lost in scope 1 is Transmission fossil fuel and combustion Distribution from (T&D) by the stationary EF provided by and mobile Brazilian sources. government. These The EF has no categories uncertainty have value uncertainty associated with defined by it. The analysis IPCC about emission uncertainty factors and from the activity data metering uncertainty systems used More than More than Assumptions (mainly from Assumptions by Brazilian 5% but less 2% but less Metering/ measurement Metering/ energy than or than or Measurement problems). Measurement companies equal to to 5% Constraints Certain Constraints showed that 10% assumptions these about the equipments efficiency of present +-3% wastewater error from their treatment measurements. also increase For the the electricity lost uncertainty in in T&D, as the inventory, there was no but as the study about its participation uncertainty, we of this assumed as category is After relatively adding the small, that information problem does using IPCC not affect the formula, the quality of the final inventory in uncertainty 2011. range was around 10%, as T&D represented the largest component in scope 2 emissions.
Uncertainty range sources of uncertainty expand on the uncertainty in your data Uncertainty range sources of uncertainty expand on the uncertainty in your data More than 2% but less than or to 5% Assumptions Metering/ Measurement Constraints The main source of emissions on scope 1 is fossil fuel combustion from stationary and mobile sources. These categories have uncertainty defined by IPCC emission factors and activity data uncertainty (mainly from measurement problems). Certain assumptions about the efficiency of wastewater treatment also increase the uncertainty in the inventory, but as the participation of this category is relatively small, that problem does not affect the quality of the inventory in 2011. More than 5% but less than or equal to 10% Assumptions Metering/ Measurement Constraints The GHG emission on this scope is calculated by multiplying the energy consumption described in the electricity bill or lost in Transmission and Distribution (T&D) by the EF provided by Brazilian government. The EF has no uncertainty value associated with it. The analysis about uncertainty from the metering systems used by Brazilian energy companies showed that these equipments present +-3% error from their measurements. For the electricity lost in T&D, as there was no study about its uncertainty, we assumed as After adding the information using IPCC formula, the final uncertainty range was around 10%, as T&D represented the largest component in scope 2 emissions.
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