부산대학교 도서관

Short-lived climate forcers (SLCFs) like methane, ozone and aerosols have a shorter atmospheric lifetime than CO2and are often assumed to have a short-term effect on the climate system: should their emissions cease, so would their radiative forcing (RF). However, via their climate impact, SLCFs can affect carbon sinks and atmospheric CO2, causing additional climate change. Here, we use a compact Earth system model to attribute CO2RF to direct CO2emissions and to climate–carbon feedbacks since the pre-industrial era. We estimate the climate–carbon feedback contributed 93?±?50?mW?m-2(~5%) to total RF of CO2in 2010. Of this, SLCF impacts were -13?±?50?mW?m-2, made up of cooling (-115?±?43?mW?m-2) and warming (102?±?26?mW?m-2) terms that largely cancel. This study illustrates the long-term impact that short-lived species have on climate and indicates that past (and future) change in atmospheric CO2cannot be attributed only to CO2emissions.