portuguese national inventory report on greenhouse gases, 1990

AgricultureTable 6.24 – Percentage of livestock population living in climate cool regions in Portugal in years1990 and 2011.Animal Type 1990 2011Dairy Cows 48 39Other Cattle 43 25Sheep 29 34Goats 50 48Horses 34 42Mules and Asses 58 72Swine 22 16Poultry 41 44Other 65 65All the Methane Conversion Factors are the defaults for temperate regions of Western Europeand developed countries:Table 6.25 - Methane Conversion Factors (MCF), per cent, for determination of CH 4 emissions fromManure ManagementMMS Temperate CoolLaggons 45 39Tanks 0 0Solid Storage 1.5 1Pasture 1.5 1In the 2010 review an issue concerning the CH4 IEF for swine was identified by the UNFCCCreview team: the IEF for 2008 was considered much higher than the IPCC default for WesternEurope. In Portugal the majority of manure from swine is treated in anaerobic lagoons (84.5 percent) contrary to what IPCC considers default (0 per cent). This MMS shows the highest CH4conversion factor among all management systems which explains the higher IEF for swine inPortugal.During the 2013 <strong>inventory</strong> preparation process an inconsistency was found concerning dataallocation on pig farms methane recovery systems (this recovery was accounted in 6.B.2). Tocorrect this issue, the methane recovered in pigfarms is now considered in 4.B. total CH4emissions instead of 6.B.2.6.3.2.4 Activity DataIn a consistent manner livestock numbers are the same that were used in previous subcategory:CH 4 from enteric fermentation. Although for this source category more species areconsidered in the emissions estimates, namely birds.6.3.2.5 Uncertainty AssessmentLivestock numbers are considered to be the activity data of this source category and theuncertainty values were equal to uncertainty values discussed for CH 4 emissions from EntericFermentation, as explained in the previous chapter.Portuguese National Inventory Report 2013MAMAOT6-40