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  3. Fail:Carbon Dioxide 400kyr.png - Wikipedia Bahasa Melayu, ensiklopedia bebas
Fail:Carbon Dioxide 400kyr.png - Wikipedia Bahasa Melayu, ensiklopedia bebas
Daripada Wikipedia, ensiklopedia bebas.

Carbon_Dioxide_400kyr.png (600 × 436 piksel, saiz fail: 26 KB, jenis MIME: image/png)

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Ringkasan

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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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. Please refer to the image description page for more information.
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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 Center, 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 Center, 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 Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.

Other language

日本語: Image:Carbon_Dioxide_400kyr_ja.png

Captions

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Carbon dioxide levels over the past 400,000 years, showing the dramatic recent increase.

Items portrayed in this file

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image/png

hasil tambah semak

f3e21e17422e27d036db7f30a6ed7b44d0f0983d

kaedah penentuan: SHA-1

saiz data

26,793 bait

tinggi

436 piksel

lebar

600 piksel

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Tarikh/WaktuGambar kenitUkuranPenggunaKomen
semasa19:40, 21 Disember 2009Gambar kenit bagi versi pada 19:40, 21 Disember 2009600 × 436 (26 KB)Dragons flightavoid stupid emphasis on physically unobtainable zero
16:34, 23 November 2009Gambar kenit bagi versi pada 16:34, 23 November 2009605 × 734 (28 KB)MPFSet vertical scale origin to zero for clarity; sentence case capitalisation for text
17:46, 22 September 2006Gambar kenit bagi versi pada 17:46, 22 September 2006600 × 436 (26 KB)Nils Simon
06:38, 10 April 2006Gambar kenit bagi versi pada 06:38, 10 April 2006512 × 380 (22 KB)Pflatau__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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