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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.
Mann, Park & Bradley 1995 "Global interdecadal and century-scale climate oscillations during the past five centuries". Overpeck et al. 1997 "Arctic Environmental Change of the Last Four Centuries". Fisher 1997 "High resolution reconstructed Northern Hemisphere temperatures for the last few centuries: using regional average tree ring, ice core ...
The number and severity of high-cost extreme weather events has increased in the 21st century in the United States, and some of these are because of global warming. By August 2011 alone, the NOAA had registered nine distinct extreme weather disasters for that year, each totalling $1 billion or more in economic losses.
The curve on the timeline shows the summarized values for all countries over time. The timeline is also a year slider, allowing the user to select year for the map. If the user marks an interval of several years on the timeline, the map colors indicate how the value has changed between the first and last year in the interval.
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
An early (2018) warming stripes graphic published by their originator, climatologist Ed Hawkins. [1] The progression from blue (cooler) to red (warmer) stripes portrays annual increases of global average temperature since 1850 (left side of graphic) until the date of the graphic (right side).
800,000-, 2,000-, 139-year global average temperature —— Further includes an 800,000 year chart Temperature reconstruction last two millennia —— source of top chart 20190727 COMPARE warming stripes - Global vs Caribbean 1910-2018 (ref 1910-2000) —— top warming stripes graphic (global) uses same data (NOAA) as the bottom chart
The reconstruction found significant variability around a long-term cooling trend of –0.02 °C per century, as expected from orbital forcing, interrupted in the 20th century by rapid warming which stood out from the whole period, with the 1990s "the warmest decade, and 1998 the warmest year, at moderately high levels of confidence."