For the climate system the cumulative total anthropogenic emissions over time are relevant for the total concentration of GHGs in the atmosphere.
Maidir leis an gcóras aeráide, tá iomlán carnach na n-astaíochtaí antrapaigineacha thar thréimhse ama ábhartha ó thaobh tiúchan iomlán GCTanna san atmaisféar.