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Title: Quantifying the effects of limited CO2 fertilization on future climate

Quantifying the effects of limited CO2 fertilization on future climate The response of the land biosphere to the ongoing increase in atmospheric CO{sub 2} is not fully understood. To evaluate the approximate upper and lower limits of land sequestration of carbon, we performed simulations using a comprehensive carbon-climate model. In one case the land biosphere is vigorously fertilized by added CO{sub 2} and sequesters carbon throughout the 21st century. In a second case, CO{sub 2} fertilization saturates in year 2000; in this case the land becomes an additional source of CO{sub 2} by 2050. The predicted atmospheric CO{sub 2} concentration at year 2100 differs by 40% between the two cases. Current uncertainties preclude determination of whether the land biosphere will amplify or damp atmospheric CO{sub 2} increases by the end of the century.
Authors: ; ; ; ; ; ; ;
Publication Date:
OSTI Identifier:OSTI ID: 15013893
Report Number(s):UCRL-TR-203417
TRN: US200803%%1055
DOE Contract Number:W-7405-ENG-48
Resource Type:Technical Report
Research Org:Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Org:USDOE
Country of Publication:United States
Language:English
Subject: 58 GEOSCIENCES; 54 ENVIRONMENTAL SCIENCES; BIOSPHERE; CARBON; CLIMATES; FERTILIZATION; CARBON DIOXIDE