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Simple Global Carbon Model: The atmosphere‐terrestrial biosphere‐ocean interaction
Author(s) -
Kwon OYul,
Schnoor Jerald L.
Publication year - 1994
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/94gb00768
Subject(s) - biosphere , environmental science , carbon cycle , biota , carbon respiration , global warming , carbon fibers , soil respiration , global change , atmosphere (unit) , effects of global warming on oceans , atmospheric carbon cycle , atmospheric sciences , carbon dioxide , environmental chemistry , climate change , carbon sequestration , ecology , chemistry , oceanography , soil water , ecosystem , soil science , geology , biology , meteorology , negative carbon dioxide emission , geography , materials science , composite number , composite material
A simple global carbon model has been developed for scenario analysis, and research needs prioritization. CO 2 fertilization and temperature effects are included in the terrestrial biosphere compartment, and the ocean compartment includes inorganic chemistry which, with ocean water circulation, enables the calculation of time‐variable oceanic carbon uptake. Model‐derived Q 10 values (the increasing rate for every 10°C increase of temperature) are 1.37 for land biota photosynthesis, 1.89 for land biota respiration, and 1.95 for soil respiration, and feedback temperature is set at 0.01°C/ppm of CO 2 . These could be the important parameters controlling the carbon cycle in potential global warming scenarios. Scenario analysis, together with sensitivity analysis of temperature feedback, suggests that if CO 2 emissions from fossil fuel combustion continue at the present increasing rate of ∼1.5% per year, a CO 2 doubling (to 560 ppm) will appear in year 2060. Global warming would be responsible for 40 Gt as carbon (Gt C) accumulation in the land biota, 88 Gt C depletion from the soil carbon, a 7 Gt C accumulation in the oceans, and a 19 ppm increase in atmospheric CO 2 . The ocean buffering capacity to take up the excess CO 2 will decrease with the increasing atmospheric CO 2 concentration.