{"id":1133076,"name":"Annual concentration of atmospheric methane","unit":"parts per billion","createdAt":"2026-01-15T09:31:01.000Z","updatedAt":"2026-01-16T14:25:55.000Z","coverage":"","timespan":"-797446-2024","datasetId":7325,"shortUnit":"ppb","columnOrder":0,"shortName":"ch4_concentration","catalogPath":"grapher/climate/2026-01-14/climate_change_impacts_annual/climate_change_impacts_annual#ch4_concentration","descriptionShort":"Measured in parts per billion.","descriptionFromProducer":"This indicator describes how the levels of major greenhouse gases (GHGs) in the atmosphere have changed over geological time and in recent years. Changes in atmospheric GHGs, in part caused by human activities, affect the amount of energy held in the Earth-atmosphere system and thus affect the Earth's climate. This indicator is highly relevant to climate change because greenhouse gases from human activities are the primary driver of observed climate change since the mid-20th century (IPCC, 2021).","type":"float","dataChecksum":"17097217832997791866","metadataChecksum":"-6301018103609191591","datasetName":"Climate Change Impacts - Annual","updatePeriodDays":60,"datasetVersion":"2026-01-14","nonRedistributable":false,"display":{"name":"Annual average","unit":"parts per billion","shortUnit":"ppb"},"schemaVersion":2,"processingLevel":"major","presentation":{"titlePublic":"Annual concentration of atmospheric methane","topicTagsLinks":["Climate Change"]},"descriptionKey":["Based on ice core studies of historical concentration of greenhouse gases, and recent air monitoring sites around the 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in Atmospheric Methane","description":"The Carbon Cycle Greenhouse Gases (CCGG) research area operates the Global Greenhouse Gas Reference Network, measuring the atmospheric distribution and trends of the three main long-term drivers of climate change, carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), as well as carbon monoxide (CO) which is an important indicator of air pollution.","producer":"NOAA Global Monitoring Laboratory","citationFull":"National Oceanic and Atmospheric Administration (NOAA) Global Monitoring Laboratory, Boulder, Colorado, USA (https://gml.noaa.gov) - Trends in Atmospheric Methane.\n\nLan, X., K.W. Thoning, and E.J. Dlugokencky: Trends in globally-averaged CH4, N2O, and SF6 determined from NOAA Global Monitoring Laboratory measurements. https://doi.org/10.15138/P8XG-AA10","attribution":"NOAA Global Monitoring Laboratory - Trends in Atmospheric Methane (2026)","attributionShort":"NOAA/GML","urlMain":"https://gml.noaa.gov/ccgg/trends_ch4/","urlDownload":"https://gml.noaa.gov/webdata/ccgg/trends/ch4/ch4_mm_gl.csv","dateAccessed":"2026-01-14","datePublished":"2026-01-05","license":{"url":"https://gml.noaa.gov/about/disclaimer.html","name":"CC BY 4.0"}},{"id":10840,"titleSnapshot":"Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases - Methane","title":"Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases","description":"This indicator describes how the levels of major greenhouse gases in the atmosphere have changed over time.\n\nThe data contains concentrations of carbon dioxide in the atmosphere from hundreds of thousands of years ago through 2021, measured in parts per million (ppm). The data come from a variety of historical ice core studies and recent air monitoring sites around the world.","producer":"United States Environmental Protection Agency","citationFull":"United States Environmental Protection Agency (EPA) - Climate Change Indicators: Atmospheric Concentrations of Greenhouse Gases (2022)\n\nGlobal atmospheric concentration measurements for carbon dioxide, methane, and nitrous oxide come from a variety of monitoring programs and studies published in peer-reviewed literature.\n\nMore details can be found on [their technical documentation](https://www.epa.gov/sites/default/files/2021-03/documents/ghg-concentrations_td.pdf).","attribution":"EPA based on various sources (2022)","attributionShort":"EPA","urlMain":"https://19january2025snapshot.epa.gov/climate-indicators/climate-change-indicators-atmospheric-concentrations-greenhouse-gases/","urlDownload":"https://www.epa.gov/system/files/other-files/2022-07/ghg-concentrations_fig-2.csv","dateAccessed":"2024-04-17","datePublished":"2022-07-01","license":{"url":"https://edg.epa.gov/epa_data_license.html","name":"Public domain"}}]}