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Much of the SVG code was automatically generated by the "Vertical bar charts" spreadsheet linked at User:RCraig09/Excel to XML for SVG. Uploader moved elements around manually using a text editor before uploading. This graphic is more recent and more detailed than predecessor File:Global temperature change - decadal averages, 1880s-2000s (NOAA).png
According to IPCC Sixth Assessment Report, in the last 170 years, humans have caused the global temperature to increase to the highest level in the last 2,000 years. The current multi-century period is the warmest in the past 100,000 years. [3] The temperature in the years 2011-2020 was 1.09 °C higher than in 1859–1890.
A 2016 Gallup poll found that 64% of Americans were worried about global warming, that 59% believed that global warming was already happening, and 65% were convinced that global warming was caused by human activities. These numbers show that awareness of global warming was increasing in the United States. [300]
Publicity over the concerns of scientists about the implications of global warming led to increasing public and political interest, and the Reagan administration, concerned in part about the political impact of scientific findings, successfully lobbied for the 1988 formation of the Intergovernmental Panel on Climate Change to produce reports subject to detailed approval by government delegates ...
D'Arrigo, Wilson & Jacoby 2006 "On the long-term context for late twentieth century warming". Osborn & Briffa 2006 "The spatial extent of 20th-century warmth in the context of the past 1200 years". Hegerl et al. 2006 "Climate sensitivity constrained by temperature reconstructions over the past seven centuries".
Older Peron warm and wet, global sea levels were 2.5 to 4 meters (8 to 13 feet) higher than the twentieth-century average 3900: 5.9 kiloyear event dry and cold. 3500: End of the African humid period, Neolithic Subpluvial in North Africa, expands Sahara Desert 3000 – 0: Neopluvial in North America 3,200–2,900: Piora Oscillation, cold
World leaders are meeting in Paris this month in what amounts to a last-ditch effort to avert the worst ravages of climate change. Climatologists now say that the best case scenario — assuming immediate and dramatic emissions curbs — is that planetary surface temperatures will increase by at least 2 degrees Celsius in the coming decades.
The key conclusions of Working Group I [11] were: . An increasing body of observations gives a collective picture of a warming world and other changes in the climate system (The global average surface temperature has increased over the 20th century by about 0.6 °C; Temperatures have risen during the past four decades in the lowest 8 kilometres of the atmosphere; Snow cover and ice extent have ...