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Climate sensitivity to ocean dimethylsulphide emissions

Climate sensitivity to ocean dimethylsulphide emissions
Climate sensitivity to ocean dimethylsulphide emissions
The production of dimethylsulphide (DMS) by ocean phytoplankton is hypothesized to form part of a feedback process on global climate. Changes in the DMS flux to the atmosphere cause changes to aerosols for cloud formation, leading to changes in the amount of radiation reaching the ocean, and hence on the planktonic production of DMS. This hypothesis has been investigated using a coupled ocean-atmosphere general circulation model (COAGCM) that includes an ocean ecosystem model and an atmospheric sulphur cycle. Ocean DMS concentrations are parameterised as a function of chlorophyll, nutrient and light. The results of several sensitivity experiments are presented showing significant global climate change responses to perturbations in ocean DMS production. A small negative feedback from climate change onto ocean DMS production is found and the implications are discussed.
0094-8276
L07701
Gunson, J.R.
808dd265-66b0-489c-8579-89fbbf7dc5ca
Spall, S.A.
86582278-2827-4cab-9ba0-501b7a57189d
Anderson, T.R.
dfed062f-e747-48d3-b59e-2f5e57a8571d
Jones, A.
bcae84a4-4191-4a3e-b695-1b6e2b0681c7
Roberts, D.L.
58adcbac-d8dc-4109-ac6d-367dce405232
Totterdell, I.J.
aa4619a0-1b39-4b1b-8633-f416c6063817
Woodage, M.J.
a60a5231-f01e-4776-bb9f-f85c638298bb
Gunson, J.R.
808dd265-66b0-489c-8579-89fbbf7dc5ca
Spall, S.A.
86582278-2827-4cab-9ba0-501b7a57189d
Anderson, T.R.
dfed062f-e747-48d3-b59e-2f5e57a8571d
Jones, A.
bcae84a4-4191-4a3e-b695-1b6e2b0681c7
Roberts, D.L.
58adcbac-d8dc-4109-ac6d-367dce405232
Totterdell, I.J.
aa4619a0-1b39-4b1b-8633-f416c6063817
Woodage, M.J.
a60a5231-f01e-4776-bb9f-f85c638298bb

Gunson, J.R., Spall, S.A., Anderson, T.R., Jones, A., Roberts, D.L., Totterdell, I.J. and Woodage, M.J. (2006) Climate sensitivity to ocean dimethylsulphide emissions. Geophysical Research Letters, 33 (7), L07701. (doi:10.1029/2005GL024982).

Record type: Article

Abstract

The production of dimethylsulphide (DMS) by ocean phytoplankton is hypothesized to form part of a feedback process on global climate. Changes in the DMS flux to the atmosphere cause changes to aerosols for cloud formation, leading to changes in the amount of radiation reaching the ocean, and hence on the planktonic production of DMS. This hypothesis has been investigated using a coupled ocean-atmosphere general circulation model (COAGCM) that includes an ocean ecosystem model and an atmospheric sulphur cycle. Ocean DMS concentrations are parameterised as a function of chlorophyll, nutrient and light. The results of several sensitivity experiments are presented showing significant global climate change responses to perturbations in ocean DMS production. A small negative feedback from climate change onto ocean DMS production is found and the implications are discussed.

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Published date: 2006
Organisations: National Oceanography Centre,Southampton

Identifiers

Local EPrints ID: 41315
URI: http://eprints.soton.ac.uk/id/eprint/41315
ISSN: 0094-8276
PURE UUID: 9d126765-9da2-4593-b40c-da18babfcc22

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Date deposited: 16 Aug 2006
Last modified: 15 Mar 2024 08:27

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Contributors

Author: J.R. Gunson
Author: S.A. Spall
Author: T.R. Anderson
Author: A. Jones
Author: D.L. Roberts
Author: I.J. Totterdell
Author: M.J. Woodage

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