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@prefix dcterms: <http://purl.org/dc/terms/> . @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . @prefix gcis: <http://data.globalchange.gov/gcis.owl#> . @prefix cito: <http://purl.org/spar/cito/> . @prefix biro: <http://purl.org/spar/biro/> . <https://data.globalchange.gov/report/climate-science-special-report/chapter/our-changing-climate/finding/key-finding-1-3> dcterms:identifier "key-finding-1-3"; gcis:findingNumber "1.3"^^xsd:string; gcis:findingStatement "Many lines of evidence demonstrate that it is <em>extremely likely</em> that human influence has been the dominant cause of the observed warming since the mid-20th century. Formal detection and attribution studies for the period 1951 to 2010 find that the observed global mean surface temperature warming lies in the middle of the range of likely human contributions to warming over that same period. We find no convincing evidence that natural variability can account for the amount of global warming observed over the industrial era. For the period extending over the last century, there are no convincing alternative explanations supported by the extent of the observational evidence. Solar output changes and internal variability can only contribute marginally to the observed changes in climate over the last century, and we find no convincing evidence for natural cycles in the observational record that could explain the observed changes in climate. (<em>Very high confidence</em>)"^^xsd:string; gcis:isFindingOf <https://data.globalchange.gov/report/climate-science-special-report/chapter/our-changing-climate>; gcis:isFindingOf <https://data.globalchange.gov/report/climate-science-special-report>; ## Properties of the finding: gcis:findingProcess "The key message and supporting text summarizes extensive evidence documented in the climate science peer-reviewed literature. The analyses described in the NCA3 and IPCC assessments support our findings, and new observations and modeling studies have further substantiated these conclusions."^^xsd:string; gcis:descriptionOfEvidenceBase "The Key Finding and supporting text summarizes extensive evidence documented in the climate science literature and are similar to statements made in previous national (NCA3) and international assessments. The human effects on climate have been well documented through many papers in the peer-reviewed scientific literature (e.g., see Ch. 2: Physical Drivers of Climate Change and Ch. 3: Detection and Attribution for more discussion of supporting evidence)."^^xsd:string; gcis:assessmentOfConfidenceBasedOnEvidence "There is <em>very high confidence</em> for a major human influence on climate."^^xsd:string; gcis:newInformationAndRemainingUncertainties "Key remaining uncertainties relate to the precise magnitude and nature of changes at global, and particularly regional, scales, and especially for extreme events and our ability to simulate and attribute such changes using climate models. The exact effects from land use changes relative to the effects from greenhouse gas emissions need to be better understood."^^xsd:string; a gcis:Finding . ## This finding cites the following entities: <https://data.globalchange.gov/report/climate-science-special-report/chapter/our-changing-climate/finding/key-finding-1-3> cito:cites <https://data.globalchange.gov/report/nca3>; biro:references <https://data.globalchange.gov/reference/dd5b893d-4462-4bb3-9205-67b532919566>. <https://data.globalchange.gov/report/climate-science-special-report/chapter/our-changing-climate/finding/key-finding-1-3> cito:cites <https://data.globalchange.gov/report/ipcc-ar5-wg1>; biro:references <https://data.globalchange.gov/reference/f03117be-ccfe-4f88-b70a-ffd4351b8190>.