Image:Carbon Dioxide 400kyr.png

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Description

This figure shows the variations in concentration of carbon dioxide (CO2) in the atmosphere during the last 400 thousand years. Throughout most of the record, the largest changes can be related to glacial/interglacial cycles within the current ice age. Although the glacial cycles are most directly caused by changes in the Earth's orbit (i.e. Milankovitch cycles), these changes also influence the carbon cycle, which in turn feeds back into the glacial system.

Since the Industrial Revolution, circa 1800, the burning of fossil fuels has caused a dramatic increase of CO2 in the atmosphere, reaching levels unprecedented in the last 400 thousand years. This increase has been implicated as a primary cause of global warming.

The newer cores taken by the EPICA team go back farther, to 650,000 years that show the same thing. There is data from further back than that, and it is hoped eventually they can drill cores that go back 1.5 million years.

Copyright

This figure was prepared by Robert A. Rohde from publicly available data and is incorporated into the Global Warming Art project.


Image from Global Warming Art

This image is an original work created for Global Warming Art.

Permission is granted to copy, distribute and/or modify this image under either:

  • The GNU Free Documentation License Version 1.2; with no Invariant Sections, Front-Cover Texts, or Back-Cover Texts.
  • The Creative Commons Attribution-NonCommercial-ShareAlike License Version 2.5

Please refer to the image description page on Global Warming Art for more information

  • http://www.globalwarmingart.com/wiki/Image:Carbon_Dioxide_400kyr.png


Data Sources

  1. (blue) Vostok ice core: Fischer, H., M. Wahlen, J. Smith, D. Mastroianni, and B. Deck (1999). "Ice core records of Atmospheric CO2 around the last three glacial terminations". Science 283: 1712-1714. 
  2. (green) EPICA ice core: Monnin, E., E.J. Steig, U. Siegenthaler, K. Kawamura, J. Schwander, B. Stauffer, T.F. Stocker, D.L. Morse, J.-M. Barnola, B. Bellier, D. Raynaud, and H. Fischer (2004). "Evidence for substantial accumulation rate variability in Antarctica during the Holocene, through synchronization of CO2 in the Taylor Dome, Dome C and DML ice cores". Earth and Planetary Science Letters 224: 45-54.  DOI: 10.1016/j.epsl.2004.05.007
  3. (red) Law Dome ice core: D.M. Etheridge, L.P. Steele, R.L. Langenfelds, R.J. Francey, J.-M. Barnola and V.I. Morgan (1998) "Historical CO2 records from the Law Dome DE08, DE08-2, and DSS ice cores" in Trends: A Compendium of Data on Global Change. Carbon Dioxide Information Analysis Centre, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.
  4. (cyan) Siple Dome ice core: Neftel, A., H. Friedli, E. Moor, H. Lötscher, H. Oeschger, U. Siegenthaler, and B. Stauffer (1994) "Historical CO2 record from the Siple Station ice core" in Trends: A Compendium of Data on Global Change. Carbon Dioxide Information Analysis Centre, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.
  5. (black) Mauna Loa Observatory, Hawaii: Keeling, C.D. and T.P. Whorf (2004) "Atmospheric CO2 records from sites in the SIO air sampling network" in Trends: A Compendium of Data on Global Change. Carbon Dioxide Information Analysis Centre, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.

Related images

Expanded record of CO2 from the last 50 years at Mauna Loa

CO2 at Mauna Loa since 1958.


Trends of major greenhouse gases.

Solar variation and greenhouse gases during 420,000 years.

Recent global CO2 emissions, logarithmic scale.

Carbon dioxide variations during the last 550 million years.

File history

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  • (del) (cur) 04:39, 8 April 2005 . . Dragons flight ( Talk | contribs) . . 512×380 (22,693 bytes) (400 kyr History of Carbon Dioxide Variations {{GFDL}})

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