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@prefix dcterms: <> .
@prefix xsd: <> .
@prefix gcis: <> .
@prefix cito: <> .
@prefix biro: <> .

   dcterms:identifier "key-message-2-1";
   gcis:findingNumber "2.1"^^xsd:string;
   gcis:findingStatement "North America—including its energy systems, land base, and coastal ocean—was a net source of carbon dioxide to the atmosphere from 2004 to 2013, contributing on average about 1,008 teragrams of carbon (Tg C) annually (±50%) (<em>very high confidence</em>)."^^xsd:string;
   gcis:isFindingOf <>;
   gcis:isFindingOf <>;

## Properties of the finding:
   gcis:descriptionOfEvidenceBase "Key Finding 1 is supported by fossil fuel emissions data (Boden et al., 2015), forest inventories in the United States (Woodall et al., 2015; see <a href=''>Ch. 9: Forests</a>) and Canada (Stinson et al., 2011), atmospheric inverse modeling ensembles (see <a href=''>Ch. 6: Social Science Perspectives on Carbon</a>), terrestrial biosphere model ensembles (Huntzinger et al., 2012), synthesis studies from previous work (Hayes et al., 2012; King et al., 2012, 2015), and a compilation of estimates across the various chapters of this report."^^xsd:string;
   gcis:assessmentOfConfidenceBasedOnEvidence "There is very high confidence that the North American continent is a net source of carbon to the atmosphere given the convergence of evidence across multiple inventory, scaling, and modeling approaches. This evidence suggests that current levels of fossil fuel emissions far outpace the ability of terrestrial ecosystems to take up and store that carbon."^^xsd:string;
   gcis:newInformationAndRemainingUncertainties "Regional- to continental-scale estimates of the magnitude and variability of the terrestrial carbon sink differ substantially among assessments, depending on the measurement or scaling approach used and the budget components considered (Hayes and Turner 2012; King et al., 2015)."^^xsd:string;

   a gcis:Finding .

## This finding cites the following entities:

   prov:wasDerivedFrom <>.