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Atmospheric carbon dioxide (CO 2) concentrations from 1958 to 2023. The Keeling Curve is a graph of the annual variation and overall accumulation of carbon dioxide in the Earth's atmosphere based on continuous measurements taken at the Mauna Loa Observatory on the island of Hawaii from 1958 to the present day.
The concentrations of carbon dioxide in the atmosphere are expressed as parts per million by volume (abbreviated as ppmv, or ppm(v), or just ppm). To convert from the usual ppmv units to ppm mass (abbreviated as ppmm, or ppm(m)), multiply by the ratio of the molar mass of CO 2 to that of air, i.e. times 1.52 (44.01 divided by 28.96).
English: This figure shows the history of atmospheric carbon dioxide concentrations as directly measured at Mauna Loa, Hawaii since 1958. This curve is known as the Keeling curve , and is an essential piece of evidence of the man-made increases in greenhouse gases that are believed to be the cause of global warming .
Uploader generated most of SVG code with the Horizontal bar charts spreadsheet from User:RCraig09/Excel to XML for SVG; minor moves and nudges were performed manually on the SVG code. A similar graphic, but including greenhouse gases and not only CO₂, was uploaded 28 Dec 2021 at File:20211228 Cumulative greenhouse gas emissions by country and ...
The Wikipedia will use its language if the SVG file supports that language. For example, the German Wikipedia will use German if the SVG file has German. To embed this file in a particular language use the lang parameter with the appropriate language code, e.g. [[File:CO2 emission pie chart.svg|lang=en]] for the English version
Updates atmospheric CO2 from 350 ppm to 387 ppm and CH4 from 1745 ppb to 1790 ppb (values for 2009, other values were seriously out of date) 13:48, 28 September 2008 180 × 375 (27 KB)
Carbon dioxide is soluble in water and is found in groundwater, lakes, ice caps, and seawater. It is a trace gas in Earth's atmosphere at 421 parts per million (ppm), [a] or about 0.042% (as of May 2022) having risen from pre-industrial levels of 280 ppm or about 0.028%.
Concentrations in ppm of the major greenhouse gases between 1978 and 2010. Greenhouse gas monitoring is the direct measurement of greenhouse gas emissions and levels. There are several different methods of measuring carbon dioxide concentrations in the atmosphere, including infrared analyzing and manometry.