claim: "by the 2001 [IPCC] climate assessment...the Medieval Warm Period had been ingeniously wiped out.
evidences.evidence_id: Hockey stick controversy:34
evidences.article: Hockey stick controversy
evidences.evidence: The IPCC First Assessment Report in 1990 noted evidence that Holocene climatic optimum around 5,000-6,000 years ago had been warmer than the present (at least in summer) and that in some areas there had been exceptional warmth during "a shorter Medieval Warm Period (which may not have been global)" about AD 950-1250, followed by a cooler period of the Little Ice Age which ended only in the middle to late nineteenth century.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Intergovernmental Panel on Climate Change:270
evidences.article: Intergovernmental Panel on Climate Change
evidences.evidence: This graph extended the similar graph in Figure 3.20 from the IPCC Second Assessment Report of 1995, and differed from a schematic in the first assessment report that lacked temperature units, but appeared to depict larger global temperature variations over the past 1000 years, and higher temperatures during the Medieval Warm Period than the mid 20th century.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Intergovernmental Panel on Climate Change:298
evidences.article: Intergovernmental Panel on Climate Change
evidences.evidence: These values are much greater than the 9–88 cm as projected by the IPCC itself in its Third Assessment Report, published in 2001".
evidences.votes: NOT_ENOUGH_INFO NOT_ENOUGH_INFO
evidences.evidence_id: Intergovernmental Panel on Climate Change:348
evidences.article: Intergovernmental Panel on Climate Change
evidences.evidence: "We concur with the climate science assessment of the Intergovernmental Panel on Climate Change (IPCC) in 2001 ... We endorse the conclusions of the IPCC assessment..." Canadian Meteorological and Oceanographic Society.
evidences.votes: NOT_ENOUGH_INFO SUPPORTS
evidences.evidence_id: Medieval Warm Period:16
evidences.article: Medieval Warm Period
evidences.evidence: The IPCC Third Assessment Report from 2001 then summarized research: "evidence does not support globally synchronous periods of anomalous cold or warmth over this time frame, and the conventional terms of 'Little Ice Age' and 'Medieval Warm Period' appear to have limited utility in describing trends in hemispheric or global mean temperature changes in past centuries."
evidences.votes: REFUTES NOT_ENOUGH_INFO