claim: Had he used the currently accepted value of approximately 3°C warming for a doubling of atmospheric CO2, Hansen would have correctly projected the ensuing global warming.
evidences.evidence_id: Greenhouse effect:14
evidences.article: Greenhouse effect
evidences.evidence: The effect was more fully quantified by Svante Arrhenius in 1896, who made the first quantitative prediction of global warming due to a hypothetical doubling of atmospheric carbon dioxide.
evidences.votes: SUPPORTS NOT_ENOUGH_INFO NOT_ENOUGH_INFO
evidences.evidence_id: James Hansen:120
evidences.article: James Hansen
evidences.evidence: He argued that if the temperature rose 0.4 °C above the 1950–1980 mean for a few years, it would be the "smoking gun" pointing to human-caused global warming.
evidences.votes: NOT_ENOUGH_INFO NOT_ENOUGH_INFO NOT_ENOUGH_INFO
evidences.evidence_id: James Hansen:246
evidences.article: James Hansen
evidences.evidence: Decades ago, they correctly predicted how much Earth's temperature would rise due to increasing atmospheric CO2.
evidences.votes: NOT_ENOUGH_INFO SUPPORTS NOT_ENOUGH_INFO
evidences.evidence_id: James Hansen:83
evidences.article: James Hansen
evidences.evidence: In 2000, Hansen advanced an alternative view of global warming over the last 100 years, arguing that during that time frame the negative forcing via aerosols and the positive forcing via carbon dioxide (CO 2) largely balanced each other out, and that the 0.74±0.18 °C net rise in average global temperatures could mostly be explained by greenhouse gases other than carbon dioxide, such as methane and chlorofluorocarbons.
evidences.votes: NOT_ENOUGH_INFO NOT_ENOUGH_INFO NOT_ENOUGH_INFO
evidences.evidence_id: James Hansen:99
evidences.article: James Hansen
evidences.evidence: An alternate scenario would keep the warming to below this if climate sensitivity were below 3 °C for doubled CO 2.
evidences.votes: NOT_ENOUGH_INFO SUPPORTS SUPPORTS