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dc.contributor.authorLund, Marianne Tronstad
dc.contributor.authorMyhre, Gunnar
dc.contributor.authorHaslerud, Amund Søvde
dc.contributor.authorSkeie, Ragnhild Bieltvedt
dc.contributor.authorGriesfeller, Jan
dc.contributor.authorPlatt, Stephen Matthew
dc.contributor.authorKumar, Rajesh
dc.contributor.authorMyhre, Cathrine Lund
dc.contributor.authorSchulz, Michael
dc.date.accessioned2021-05-11T10:55:38Z
dc.date.available2021-05-11T10:55:38Z
dc.date.created2018-12-10T10:41:13Z
dc.date.issued2018
dc.identifier.citationGeoscientific Model Development. 2018, 11 4909-4931.
dc.identifier.issn1991-959X
dc.identifier.urihttps://hdl.handle.net/11250/2754846
dc.description.abstractWe document the ability of the new-generation Oslo chemistry-transport model, Oslo CTM3, to accurately simulate present-day aerosol distributions. The model is then used with the new Community Emission Data System (CEDS) historical emission inventory to provide updated time series of anthropogenic aerosol concentrations and consequent direct radiative forcing (RFari) from 1750 to 2014. Overall, Oslo CTM3 performs well compared with measurements of surface concentrations and remotely sensed aerosol optical depth. Concentrations are underestimated in Asia, but the higher emissions in CEDS than previous inventories result in improvements compared to observations. The treatment of black carbon (BC) scavenging in Oslo CTM3 gives better agreement with observed vertical BC profiles relative to the predecessor Oslo CTM2. However, Arctic wintertime BC concentrations remain underestimated, and a range of sensitivity tests indicate that better physical understanding of processes associated with atmospheric BC processing is required to simultaneously reproduce both the observed features. Uncertainties in model input data, resolution, and scavenging affect the distribution of all aerosols species, especially at high latitudes and altitudes. However, we find no evidence of consistently better model performance across all observables and regions in the sensitivity tests than in the baseline configuration. Using CEDS, we estimate a net RFari in 2014 relative to 1750 of −0.17 W m−2, significantly weaker than the IPCC AR5 2011–1750 estimate. Differences are attributable to several factors, including stronger absorption by organic aerosol, updated parameterization of BC absorption, and reduced sulfate cooling. The trend towards a weaker RFari over recent years is more pronounced than in the IPCC AR5, illustrating the importance of capturing recent regional emission changes.
dc.language.isoeng
dc.titleConcentrations and radiative forcing of anthropogenic aerosols from 1750 to 2014 simulated with the Oslo CTM3 and CEDS emission inventory
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersion
dc.source.pagenumber4909-4931
dc.source.volume11
dc.source.journalGeoscientific Model Development
dc.identifier.doi10.5194/gmd-11-4909-2018
dc.identifier.cristin1640955
dc.relation.projectNorges forskningsråd: 250573
dc.relation.projectEC/H2020/654109
dc.relation.projectNorges forskningsråd: 248834
dc.relation.projectNorges forskningsråd: 244074
cristin.unitcode7475,0,0,0
cristin.unitnameCICERO Senter for klimaforskning
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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