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Since then, it has increased about a full 1°C—in a time period less than 1/3,000th the width of the top chart. Bottom chart: This 1°C increase, commonly called global warming, accelerated since 1980—a period less than 1/20,000th the width of the top chart. SOURCES (and related explanations): 1. Top chart (800,000 years): — Data itself:
These numbers show that awareness of global warming was increasing in the United States. [300] A Gallup poll showed that 62% of Americans believe that the effects of global warming were happening in 2017. [301] In 2019, Gallup poll found that one-third of Americans blame unusual winter temperatures on climate change. [302]
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
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.
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
In the 1980s, the terms global warming and climate change became more common, often being used interchangeably. [29] [30] [31] Scientifically, global warming refers only to increased surface warming, while climate change describes both global warming and its effects on Earth's climate system, such as precipitation changes. [28]
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."