Simulating dimethylsulphide seasonality with the Dynamic Green Ocean Model PlankTOM5

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Author(s) Vogt, M., Vallina, S.M., Buitenhuis, E.T., Bopp, L., Le Quéré, C.
Publication Type Journal Items, Publication Status: Published
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Title Simulating dimethylsulphide seasonality with the Dynamic Green Ocean Model PlankTOM5
Author(s) Vogt, M.
Vallina, S.M.
Buitenhuis, E.T.
Bopp, L.
Le Quéré, C.
Description 21 p.
Journal or Series Title Journal of geophysical research. C, Oceans
Volume Number 115
Start Page C06021
ISSN 0148-0227
Publisher American Geophysical Union
Publication Place Washington, DC
Publication Date 2010
Keyword(s) dimethylsulphide
summer paradox
marine ecosystems
Abstract We study the dynamics of dimethylsulphide (DMS) and dimethylsulphoniopropionate (DMSP) using the global ocean biogeochemistry model PlankTOM5, which includes three phytoplankton and two zooplankton functional types (PFTs). We present a fully prognostic DMS module describing intracellular particulate DMSP (DMSPp) production, concentrations of dissolved DMSP (DMSPd), and DMS production and consumption. The model produces DMS fields that compare reasonably well with the observed annual mean DMS fields, zonal mean DMS concentrations, and its seasonal cycle. Modeled ecosystem composition and modeled total chlorophyll influenced mean DMS concentrations and DMS seasonality at mid- and high latitudes, but did not control the seasonal cycle in the tropics. The introduction of a direct, irradiation-dependent DMS production term (exudation) in the model improved the match between modeled and observed DMS seasonality, but deteriorated simulated zonal mean concentrations. In PlankTOM5, exudation was found to be most important for DMS seasonality in the tropics, and a variable DMSP cell quota as a function of light and nutrient stress was more important than a PFT-specific minimal DMSPp cell quota. The results suggest that DMS seasonality in the low latitudes is mostly driven by light. The agreement between model and data for DMS, DMSPp, and DMSPd is reasonable at the Bermuda Atlantic Time Series Station, where the summer paradox is observed.
DOI 10.1029/2009JC005529
Additional Notes Received 21 May 2009, Revised 25 November 2009, Accepted 10 February 2010, Published 25 June 2010
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03731
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NEBIS System Number 004289352
Source Database ID FORM-1292590579
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@article{Vgt2010,
  author = "Vogt, M. and Vallina, S.M. and Buitenhuis, E.T. and Bopp, L. and Le Qu{\'{e}}r{\'{e}}, C.",
  title = "{S}imulating dimethylsulphide seasonality with the {D}ynamic {G}reen {O}cean {M}odel {P}lank{T}{O}{M}5",
  journal = "Journal of geophysical research. C, Oceans",
  year = 2010,
  volume = "115",
  pages = "C06021--",
}


E-Citations record created: Fri, 17 Dec 2010, 12:56:35 CET