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Simulating oceanic CaCO 3 export production in the greenhouse
Author(s) -
Heinze C.
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl020613
Subject(s) - biogeochemical cycle , environmental science , carbon dioxide , greenhouse gas , atmospheric sciences , remineralisation , oceanography , biogeochemistry , atmospheric carbon cycle , carbon cycle , carbon fibers , greenhouse effect , carbon sequestration , climate change , environmental chemistry , global warming , ecosystem , chemistry , geology , materials science , ecology , inorganic chemistry , organic chemistry , composite number , composite material , biology , fluoride
A model scenario for the change in global marine biogenic CaCO 3 export production (CaCO 3 = calcium carbonate) due to increasing atmospheric carbon dioxide partial pressure is carried out. Findings from laboratory experiments, which suggest a decrease of biocalcification at higher p CO 2 , are extrapolated to the world ocean by use of the biogeochemical ocean general circulation model HAMOCC. For an A1B IPCC emission scenario and constant emission rates after year 2100, the simulation predicts a global decrease of biological CaCO 3 export production by about 50% in year 2250. The negative feedback due to this drop in CaCO 3 export on the atmospheric CO 2 concentration is small as compared to the anthropogenic CO 2 emissions. This negative feedback will potentially be compensated by a shallower remineralization of organic carbon.