File:Carbon Dioxide 400kyr.png
Carbon_Dioxide_400kyr.png (600 × 436 na pixel, laki: 26 KB, uri ng MIME: image/png)
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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 1900, 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 spacing of carbon dioxide samples varies through time. At the present, the atmosphere is sampled routinely (at least daily) and complete annual averages are available. From the four ice cores presented on this plot the sampling varies from as rapid as one point every few years (recent parts of the Law Dome record) to as sparse as one sample every few thousand years (oldest parts of the Vostok record). In principle, the sparse sampling in the oldest parts of the record could hide abrupt excursions; however, isotopic measurements of ice cores (which are made continuously along the entire core) and our current understanding of the rates of natural processes for creating and removing carbon dioxide from the atmosphere make it unlikely that any positive excursions in carbon dioxide comparable to the Industrial Revolution have happened during the interval presented above.
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Copyright[baguhin]
This figure was prepared by Robert A. Rohde from publicly available data and is incorporated into the Global Warming Art project.
Pinapayagan ang pagkopya, pamamahagi, at/o pagbabago sa dokumentong ito sa ilalim ng mga nakasaad sa GNU Free Documentation License, Bersyon 1.2 o kahit anong mas bagong bersyong nilathala ng Free Software Foundation; nang walang pabago-bagong bahagi, walang teksto sa front-cover, at walang teksto sa back-cover. May nakalagay na kopya ng lisensiya sa bahaging pinamagatang GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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Data Sources[baguhin]
- (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.
- (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
- (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 Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.
- (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 Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.
- (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 Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.
Related images[baguhin]
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Expanded record of CO2 from the last 50 years at Mauna Loa
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CO2 at Mauna Loa since 1958. [1] archive copy at the Wayback Machine [2] archive copy at the Wayback Machine
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Trends of major greenhouse gases.
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Solar variation and greenhouse gases during 420,000 years.
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Recent global CO2 emissions, logarithmic scale.
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Carbon dioxide variations during the last 550 million years.
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Petsa/Oras | Thumbnail | Sukat | Tagagamit | Komento | |
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ngayon | 19:40, 21 Disyembre 2009 | 600 × 436 (26 KB) | Dragons flight (usapan | ambag) | avoid stupid emphasis on physically unobtainable zero | |
16:34, 23 Nobyembre 2009 | 605 × 734 (28 KB) | MPF (usapan | ambag) | Set vertical scale origin to zero for clarity; sentence case capitalisation for text | ||
17:46, 22 Setyembre 2006 | 600 × 436 (26 KB) | Nils Simon (usapan | ambag) | |||
06:38, 10 Abril 2006 | 512 × 380 (22 KB) | Pflatau (usapan | ambag) | __NOTOC__ == Description == This figure shows the variations in concentration of carbon dioxide (CO<sub>2</sub>) in the atmosphere during the last 400 thousand years. Throughout most of the record, the largest changes can be |
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