The Paleozoic to Mesozoic carbon cycle revisited: The carbon isotopic composition of terrestrial organic matter | Zendy

Strauss Harald | Zendy; PetersKottig Wolfgang | Zendy

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The Paleozoic to Mesozoic carbon cycle revisited: The carbon isotopic composition of terrestrial organic matter

Author(s) -

Strauss Harald,

PetersKottig Wolfgang

Publication year - 2003

Publication title -

geochemistry, geophysics, geosystems

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.928

H-Index - 136

ISSN - 1525-2027

DOI - 10.1029/2003gc000555

Subject(s) - isotopes of carbon , carbon dioxide in earth's atmosphere , carbon cycle , geology , carbonate , organic matter , carbon fibers , isotope fractionation , earth science , paleontology , total organic carbon , δ13c , fractionation , environmental chemistry , stable isotope ratio , oceanography , chemistry , ecology , climate change , ecosystem , materials science , organic chemistry , composite number , composite material , biology , physics , quantum mechanics

Two thousand one hundred forty‐eight carbon isotope values for terrestrial organic matter (plant fossils, coal, bulk terrestrial organic matter) provide a proxy record for temporal changes in the global carbon cycle. δ 13 C TOM , δ 13 C carb , and δ 13 C CO2 allow a full evaluation of carbon transfer in the atmosphere‐ocean system as well as between the marine and the terrestrial realm. The temporal evolution of δ 13 C TOM parallels respective data sets from marine carbonate carbon, thus reflecting the linkage between both reservoirs via atmospheric carbon dioxide. On the basis of a comparison between measured and predicted isotope records for δ 13 C TOM , changes in the carbon isotopic fractionation associated with plant metabolism are discernible. This contradicts the notion of an invariable carbon isotopic fractionation associated with C 3 plant metabolism. In light of results from current plant growth experiments, these changes are viewed as dependent on the atmospheric O 2 /CO 2 . Hence δ 13 C TOM might serve as a proxy signal for atmospheric composition.

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