Desert dust and anthropogenic aerosol interactions in the Community Climate System Model coupled-carbon-climate model
Mahowald, Natalie M.
Doney, Scott C.
Moore, J. Keith
Thornton, Peter E.
Randerson, James T.
Jones, C. D.
MetadataShow full item record
Coupled-carbon-climate simulations are an essential tool for predicting the impact of human activity onto the climate and biogeochemistry. Here we incorporate prognostic desert dust and anthropogenic aerosols into the CCSM3.1 coupled carbon-climate model and explore the resulting interactions with climate and biogeochemical dynamics through a series of transient anthropogenic simulations (20th and 21st centuries) and sensitivity studies. The inclusion of prognostic aerosols into this model has a small net global cooling effect on climate but does not significantly impact the globally averaged carbon cycle; we argue that this is likely to be because the CCSM3.1 model has a small climate feedback onto the carbon cycle. We propose a mechanism for including desert dust and anthropogenic aerosols into a simple carbon-climate feedback analysis to explain the results of our and previous studies. Inclusion of aerosols has statistically significant impacts on regional climate and biogeochemistry, in particular through the effects on the ocean nitrogen cycle and primary productivity of altered iron inputs from desert dust deposition.
© The Authors, 2011. This article is distributed under the terms of the Creative Commons Attribution 3.0 License. The definitive version was published in Biogeosciences 8 (2011): 387-414, doi:10.5194/bg-8-387-2011.
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Marine ecosystem dynamics and biogeochemical cycling in the Community Earth System Model [CESM1(BGC)] : comparison of the 1990s with the 2090s under the RCP4.5 and RCP8.5 scenarios Moore, J. Keith; Lindsay, Keith; Doney, Scott C.; Long, Matthew C.; Misumi, Kazuhiro (American Meteorological Society, 2013-12-01)The authors compare Community Earth System Model results to marine observations for the 1990s and examine climate change impacts on biogeochemistry at the end of the twenty-first century under two future scenarios ...
Preindustrial-control and twentieth-century carbon cycle experiments with the Earth System Model CESM1(BGC) Lindsay, Keith; Bonan, Gordon B.; Doney, Scott C.; Hoffman, Forrest M.; Lawrence, David M.; Long, Matthew C.; Mahowald, Natalie M.; Moore, J. Keith; Randerson, James T.; Thornton, Peter E. (American Meteorological Society, 2014-12-15)Version 1 of the Community Earth System Model, in the configuration where its full carbon cycle is enabled, is introduced and documented. In this configuration, the terrestrial biogeochemical model, which includes ...
North-South asymmetry in the modeled phytoplankton community response to climate change over the 21st century Marinov, Irina; Doney, Scott C.; Lima, Ivan D.; Lindsay, Keith; Moore, J. Keith; Mahowald, Natalie M. (John Wiley & Sons, 2013-12-20)Here we analyze the impact of projected climate change on plankton ecology in all major ocean biomes over the 21st century, using a multidecade (1880–2090) experiment conducted with the Community Climate System Model ...