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GEOPHYSICAL RESEARCH LETTERS,
VOL. 30, NO. 9,
1479,
doi:10.1029/2003GL016867,
2003
Strong carbon cycle feedbacks in a climate model with interactive CO2 and sulphate aerosols
Chris D. Jones
Hadley Centre,
Met Office,
Bracknell,
UK
Peter M. Cox
Hadley Centre,
Met Office,
Bracknell,
UK
Richard L. H. Essery
Hadley Centre,
Met Office,
Bracknell,
UK
David L. Roberts
Hadley Centre,
Met Office,
Bracknell,
UK
Margaret J. Woodage
Hadley Centre,
Met Office,
Bracknell,
UK
Abstract
Carbon cycle feedbacks are a significant source of uncertainty in climate change projections, with the potential for strong
positive feedbacks to accelerate the rate of anthropogenic global warming during the 21st century. A climate change experiment
is presented which uses a General Circulation Model (GCM) in which both interactive carbon and sulphur cycles have been included
for the first time, along with the natural climate forcings due to solar changes and volcanic aerosol. These extra climate
forcing factors have a significant impact on both 20th century climate change and the contemporary land and ocean carbon sinks.
The additional forcings act to delay by more than a decade the conversion of the land carbon sink to a source, but ultimately
result in a more abrupt rate of CO2 increase with the land carbon source (which reaches 7 GtC yr−1 by 2100) exceeding the ocean carbon sink (which saturates at 5 GtC yr−1 by 2100) beyond about 2080.
Published 9
May
2003.
Index Terms: 1615 Global Change: Biogeochemical processes (4805); 1620 Global Change: Climate dynamics (3309); 0315 Atmospheric Composition and Structure: Biosphere/atmosphere interactions; 1610 Global Change: Atmosphere (0315, 0325).
Read Full Article (file size: 328083 bytes) Cited by
Citation: Jones, C. D., P. M. Cox, R. L. H. Essery, D. L. Roberts, and M. J. Woodage
(2003),
Strong carbon cycle feedbacks in a climate model with interactive CO2 and sulphate aerosols,
Geophys. Res. Lett.,
30(9),
1479,
doi:10.1029/2003GL016867.
Published in 2003 by the American Geophysical Union.
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