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page 78 of 142 RIVM report 773301 001 / NRP report 410200 051 0WRQ&2HT *OREDOWUHQGLQ)JDVHPLVVLRQV $/80,1,80352'8&7,21 (/(&75,&,7
RIVM report 773301 001 / NRP report 410200 051 page 79 of 142 7LPHSURILOHV Time profiles are distributions to describe the monthly, daily, and sometimes also weekly variation in annual emissions to account for seasonality and diurnal variation as well as the weekly rhythm of working and recreational hours. These are often required for atmospheric modellers as input into their models. In general, likewise increasing spatial resolution from global to regional to country to grid emissions, increasing temporal resolution from annual emissions to monthly to weekly to daily variation also increases the uncertainty in the estimates. Here the distinction can be made between FKDUDFWHULVWLF temporal variation which is a kind of ‘multi-year average’ and temporal variation in a specific time interval, so-called HSLVRGLF variation. From comments by the atmospheric modelling community it appears that for global modelling, at which the global inventories specifically aim, seasonality is the most important time aspect to consider. It depends on the type of model whether they need characteristic of episodic time profiles. It should be stressed, however, that anthropogenic emissions show much less temporal variation compared to natural emissions which are often strongly dependent on weather factors. In Table 4.13 the priority setting for compiling time profiles is summarised per source category in relation with their contribution to total emissions of specific compounds. 7DEOH3ULRULWLHVIRUVHFWRUDOWLPHSURILOHVEDVHGRQWKHLUFRQWULEXWLRQWRHPLVVLRQVRIYDULRXVFRPSRXQGV 0$,1&$7(*25< '(7$,/(' 35,25,7< &203281' 5(0$5. &2 &+ 12 2WKHU )RVVLOIXHOFRPEXVWLRQ ,QGXVWU\ [ [ ,52FRDOFXOWXUH" 3RZHUSODQWV [ [ +''DYDLOK\GUR&''LQ86$ 2WKHUWUDQVIVHFWRU 5HVLGHQWLDOVHWF D &2 12 +'' 5RDGWUDQVSRUW " &2 12 [ FXOWXUH" 2WKHUODQGWUDQVSRUW $LUWUDQVSRUW ,QWHUQDWLRQDOVKLSSLQJ 62 1RQHQHUJ\XVH )RVVLOIXHOSURGXFWLRQ &RDO D &+ FRDO" 2LO E [ &+ 92& PDLQSUDFWLFHVRLOJDVGHPDQGIORZ" *DV F &+ 92& PDLQSUDFWLFHVRLOJDVGHPDQGIORZ" %LRIXHOV ,QGXVWU\ 5HVLGHQWLDOVHWF E [ &+ 12 [ DYDLOGU\ZRRGIXHODYDLODJUUHVLGXHV ,QGXVWULDOSURFHVVHV ,URQ VWHHO R FXOWXUH" 1RQIHUUR 62 GHPDQGIORZ" &KHPLFDOV $GLSLF$FLG D 12 1LWULF$FLG E 12 IHUWLOL]HUGHPDQGIORZ" 1092&VRXUFHV 92& &HPHQW [ GHPDQGIORZ" *ODVV R GHPDQGIORZ" 6ROYHQWV 92& $JULFXOWXUH 5LFH &+ )HUWLOLVHUXVH 12 $QLPDOV &+ 12 %LRPDVVEXUQLQJ &2 12 EDVHGRQVDWHOOLWHGDWD" :DVWHKDQGOLQJ /DQGILOOV &+ ,QFLQQHUDWLRQ $JULFZDVWHEXUQLQJ 'RPHVWLFZDVWHEXUQLQJ 1DWXUDOVRXUFHV 6RLOV &+ 12 [ 9HJHWDWLRQ &2 92& 2FHDQV &2 12
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