claim: The divergence of tree-ring proxies from temperatures after 1960 is openly discussed in the peer-reviewed literature and the last two IPCC assessment reports.
evidences.evidence_id: Climatic Research Unit documents:67
evidences.article: Climatic Research Unit documents
evidences.evidence: The implications of the decline are discussed in Chapter 2 of the IPCC Third Assessment Report, and in Chapter 6 of the 2007 IPCC Fourth Assessment Report (AR4) which describes discussion of various possible reasons for the divergence which does not affect all the trees, and says that there is no consensus about the cause.
evidences.votes: SUPPORTS SUPPORTS SUPPORTS
evidences.evidence_id: Climatic Research Unit documents:89
evidences.article: Climatic Research Unit documents
evidences.evidence: The issues with tree rings had not been hidden, but were extensively discussed in scientific literature and in IPCC reports.
evidences.votes: SUPPORTS SUPPORTS SUPPORTS
evidences.evidence_id: Global warming:278
evidences.article: Global warming
evidences.evidence: Scientific discussion takes place in journal articles that are peer-reviewed, which scientists subject to assessment every couple of years in the Intergovernmental Panel on Climate Change reports.
evidences.votes: NOT_ENOUGH_INFO SUPPORTS NOT_ENOUGH_INFO
evidences.evidence_id: Hockey stick controversy:48
evidences.article: Hockey stick controversy
evidences.evidence: Dendroclimatologist Keith Briffa's February 1998 study reporting a divergence problem affecting some tree ring proxies after 1960 warned that this problem had to be taken into account to avoid overestimating past temperatures.
evidences.votes: SUPPORTS REFUTES SUPPORTS
evidences.evidence_id: Scientific consensus on climate change:171
evidences.article: Scientific consensus on climate change
evidences.evidence: The Geological Society of America (GSA) concurs with assessments by the National Academies of Science (2005), the National Research Council (2006), and the Intergovernmental Panel on Climate Change (IPCC, 2007) that global climate has warmed and that human activities (mainly greenhouse‐gas emissions) account for most of the warming since the middle 1900s.
evidences.votes: NOT_ENOUGH_INFO SUPPORTS NOT_ENOUGH_INFO