Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8593
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dc.contributor.authorallAnderson, B. T.; Boston Univ; Boston Univ; Boston Univ; Boston Univ, Dept Earth & Environm, Boston, MA 02215 USAen
dc.contributor.authorallKnight, J. R.; Hadley Ctr, Met Off, Exeter, Devon, Englanden
dc.contributor.authorallRinger, M. A.; Hadley Ctr, Met Off, Exeter, Devon, Englanden
dc.contributor.authorallYoon, J. H.; Pacific NW Natl Lab, Richland, WA 99352 USAen
dc.contributor.authorallCherchi, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
dc.date.accessioned2013-04-02T14:20:30Zen
dc.date.available2013-04-02T14:20:30Zen
dc.date.issued2012en
dc.identifier.urihttp://hdl.handle.net/2122/8593en
dc.description.abstractGlobal-scale variations in the climate system over the last half of the twentieth century. including long-term increases in global-mean near-surface temperatures. are consistent with concurrent human-induced emissions of radiatively active gases and aerosols. However, such consistency does not preclude the possible influence of other forcing agents, including internal modes of climate variability or unaccounted for aerosol effects. To test whether other unknown forcing agents may have contributed to multidecadal increases in global-mean near-surface temperatures from 1950 to 2000. data pertaining to observed changes in global-scale sea surface temperatures and observed changes in radiatively active atmospheric constituents are incorporated into numerical global climate models. Results indicate that the radiative forcing needed to produce the observed long-term trends in sea surface temperatures-and global-mean near-surface temperatures-is provided predominantly by known changes in greenhouse gases and aerosols. Further, results indicate that less than 10% of the long-term historical increase in global-mean near-surface temperatures over the last half of the twentieth century could have been the result of internal climate variability. In addition. they indicate that less than 25% of the total radiative forcing needed to produce the observed long-term trend in global-mean near-surface temperatures could have been provided by changes in net radiative forcing from unknown sources (either positive or negative). These results, which are derived from simple energy balance requirements. emphasize the important role humans have played in modifying the global climate over the last half of the twentieth century.en
dc.language.isoEnglishen
dc.publisher.nameAmerican Meteorological Societyen
dc.relation.ispartofJournal of climateen
dc.relation.ispartofseries/25(2012)en
dc.subjectclimate forcingen
dc.subjecttemperature increaseen
dc.subjectAGCMen
dc.titleTesting for the possible influence of unknown climate forcing upon global temperature increases from 1950 to 2000en
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber7163-7172en
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.02. Climateen
dc.identifier.doi10.1175/JCLI-D-11-00645.1en
dc.description.obiettivoSpecifico3.7. Dinamica del clima e dell'oceanoen
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.relation.issn0894-8755en
dc.relation.eissn1520-0442en
dc.contributor.authorAnderson, B. T.en
dc.contributor.authorKnight, J. R.en
dc.contributor.authorRinger, M. A.en
dc.contributor.authorYoon, J. H.en
dc.contributor.authorCherchi, A.en
dc.contributor.departmentBoston Univ; Boston Univ; Boston Univ; Boston Univ, Dept Earth & Environm, Boston, MA 02215 USAen
dc.contributor.departmentHadley Ctr, Met Off, Exeter, Devon, Englanden
dc.contributor.departmentPacific NW Natl Lab, Richland, WA 99352 USAen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptBoston Univ; Boston Univ; Boston Univ; Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA-
crisitem.author.deptHadley Ctr, Met Off, Exeter, Devon, England-
crisitem.author.deptPacific NW Natl Lab, Richland, WA 99352 USA-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.orcid0000-0002-0178-9264-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent01. Atmosphere-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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