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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: Phase diagram of CO2 (carbon dioxide). X axis is temperature in kelvin; Y axis is pressure in bar. ... current: 00:58, 13 November 2018: 742 × 700 (25 KB ...
English: Phase diagram of CO 2 (carbon dioxide). X axis is temperature in kelvin; Y axis is pressure in bar. Date: 30 November 2010: ... current: 11:09, 30 December 2011:
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atmospheric CO2 from 350 ppm to 387 ppm and CH4 from 1745 ppb to 1790 ppb (values for 2009, other values were seriously out of date) 13:48, 28 September 2008 180 × 375 (27 KB)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%.
For example, at 25 °C the pH of 3.9 is expected (see carbonic acid). At less acidic pH values, the solubility will increase because of the pH -dependent speciation of CO 2 . Vapor pressure of solid and liquid
The pCO 2 of Earth's atmosphere has risen from approximately 280 ppm (parts-per-million) to a mean 2019 value of 409.8 ppm as a result of anthropogenic release of carbon dioxide from fossil fuel burning. [citation needed] This is the highest atmospheric concentration to have existed on Earth for at least the last 800,000 years. [1]
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.