claim: Two American researchers allege that U.S. government scientists have  skewed global temperature trends by ignoring readings from thousands of  local weather stations around the world, particularly those in colder  altitudes and more northerly latitudes, such as Canada.
evidences.evidence_id: Global warming controversy:173
evidences.article: Global warming controversy
evidences.evidence: There were a small number of weather stations in the 1850s, and the number didn't reach the current 3000+ until the 1951 to 1990 period The 2001 IPCC Third Assessment Report (TAR) acknowledged that the urban heat island is an important local effect, but cited analyses of historical data indicating that the effect of the urban heat island on the global temperature trend is no more than 0.05 °C (0.09 °F) degrees through 1990.
evidences.votes: REFUTES NOT_ENOUGH_INFO
evidences.evidence_id: Global warming controversy:196
evidences.article: Global warming controversy
evidences.evidence: A study released in 2009, combined historical weather station data with satellite measurements to deduce past temperatures over large regions of the continent, and these temperatures indicate an overall warming trend.
evidences.votes: REFUTES NOT_ENOUGH_INFO
evidences.evidence_id: Global warming controversy:233
evidences.article: Global warming controversy
evidences.evidence: In a NASA report published in January 2013, Hansen and Sato noted "the 5-year mean global temperature has been flat for a decade, which we interpret as a combination of natural variability and a slowdown in the growth rate of the net climate forcing."
evidences.votes: REFUTES NOT_ENOUGH_INFO
evidences.evidence_id: Global warming controversy:236
evidences.article: Global warming controversy
evidences.evidence: Using the long-term temperature trends for the earth scientists and statisticians conclude that it continues to warm through time.
evidences.votes: REFUTES NOT_ENOUGH_INFO
evidences.evidence_id: Global warming controversy:387
evidences.article: Global warming controversy
evidences.evidence: U.S. officials, such as Philip Cooney, have repeatedly edited scientific reports from US government scientists, many of whom, such as Thomas Knutson, have been ordered to refrain from discussing climate change and related topics.
evidences.votes: SUPPORTS SUPPORTS