This graph features atmospheric temperature and methane levels, a powerful greehouse gas, that combine measurements from Antarctica ice core data as far back as 800,000 years up to the most recent measurements averaged from a global network of air sampling sites. We encourage you to embed this graph directly into your website. The graph is fully customizable to fit your websites' look and feel. This is a free service, but we do ask for a donation if you find this useful. This is a project of the 2 Degrees Institute, a non-profit organization.
Since 1983, globally-averaged CH4 levels have been collected and updated monthly as new samples are added to the analysis. A 3 month lag is required to ensure the data has been properly vetted for possible contamination. Prior to 1983, methane levels have been extracted from ice core data from Antarctica. Compare levels with historical atmospheric temperature levels by clicking the temperature icon. Learn more about the data sources.
Free methane Levels Graph
This interactive graph is free to use on your website. Simply choose your color theme and then copy and paste 2 lines of code. Data and source code is hosted on our servers so you do not have to worry about using up your server's bandwidth. New Methane and temperature data is updated automatically on a monthly basis.
Zoomable and Printable
View atmospheric CH4 levels over a span of thousands of years or zoom-in to view specific time periods. Use your fingers to pinch and zoom on a handheld device or use a mouse with a computer. Export the chart to PNG, JPG, PDF or SVG format with the click of a button or print the chart directly from the web page.
Customizable and Responsive
Choose from 4 color themes to match your website's look and feel. Customize the width and height of your graph or have it fill your entire screen. This methane graph is fully responsive and can automatically resize to fit whatever device or screen size it is being viewed on.
Recent and historical methane data combined.
800,000 years ago - 1000 years ago
Changes in past atmospheric methane concentrations are determined by measuring the composition of air trapped in ice
cores from Antarctica. So far, the Antarctic Vostok and EPICA
Dome C ice cores have provided a composite record of atmospheric
methane levels over the past 800,000 years.
Loulergue, L., A. Schilt, R. Spahni, V. Masson-Delmotte, T. Blunier,
B. Lemieux, J.-M. Barnola, D. Raynaud, T.F. Stocker, and J. Chappellaz. 2008.
Orbital and millennial-scale features of atmospheric CH4 over the past
Nature, Vol. 453, pp. 383-386, 15 May 2008. doi:10.1038/nature06950
The methane ice core records for this time period are derived from three cores
obtained from Law Dome, East Antarctica from 1987 to 1993, and samples from
the Eurocore and GISP2 ice cores from the Summit region, Greenland.
The Law Dome sites satisfy many of the desirable characteristics of an ideal
ice core site for atmospheric reconstructions including negligible melting
of the ice sheet surface, low concentrations of impurities, regular stratigraphic
layering undisturbed at the surface by wind or at depth by ice flow, and high
snow accumulation rate.
Etheridge, D.M., et al., 2002 Ice Core, Firn Air and Archived Air Atmospheric Methane Concentration Data
IGBP PAGES/World Data Center for Paleoclimatology
Data Contribution Series #2002-039.
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.
Etheridge, D. M., Steele, L. P., Francey, R. J., and
Langenfelds, R. L., 1998, Atmospheric methane between 1000 A.D. and present:
Evidence of anthropogenic emissions and climatic variability
J. Geophys. Res. Vol. 103, No. D13, p. 15,979 (98JD00923)
Globally-averaged, monthly mean atmospheric methane abundance is determined from marine surface sites. The Global Monitoring Division of NOAA's Earth System Research Laboratory has measured methane since 1983 at a globally distributed network of air sampling sites.
Dr. Pieter Tans NOAA's Earth System Research Laboratory
Dr. James Hansen Columbia University
Dr. Geoff Dutton NOAA's Earth System Research Laboratory
Dr. Jeremy Shakun Boston College
Watch this educational video.
Climate data in the ice core record
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Making climate data accessible and user-friendly like this atmospheric CO2 levels graph is a campaign of the 2° Institute (2 Degrees Institute). Its mission is to develop and support strategies that empower people to make the behavioural and lifestyle changes needed to keep our planet from warming by 2° Celsius above pre-industrial levels.