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  • Simulating the sea-to-air flux of dimethylsulfide sea in the eastern China marginal seas

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    Accepted Manuscript (AM)
    Author(s)
    Qu, Bo
    Zhao, Li
    Gabric, Albert J
    Griffith University Author(s)
    Gabric, Albert J.
    Year published
    2020
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    Abstract
    The sea-to-air flux of dimethylsulfide (DMS) is potentially an important determinant of regional climate. A nitrogen-based ecosystem model with unidirectional coupling to a sulfur-based biochemical model is used to simulate DMS flux in the Eastern China Marginal Seas (ECMS) (25°N-40°N, 120°E-130°E) during year 2011. Monthly mean of meteorological forcings (sea surface temperature (SST), wind speed (WIND), cloud cover (CLD) and mixed layer depth (MLD)) are used to force the model. A parametric sensitivity analysis is conducted to identify the critical model parameters. A genetic algorithm technique is then used to calibrate ...
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    The sea-to-air flux of dimethylsulfide (DMS) is potentially an important determinant of regional climate. A nitrogen-based ecosystem model with unidirectional coupling to a sulfur-based biochemical model is used to simulate DMS flux in the Eastern China Marginal Seas (ECMS) (25°N-40°N, 120°E-130°E) during year 2011. Monthly mean of meteorological forcings (sea surface temperature (SST), wind speed (WIND), cloud cover (CLD) and mixed layer depth (MLD)) are used to force the model. A parametric sensitivity analysis is conducted to identify the critical model parameters. A genetic algorithm technique is then used to calibrate the most sensitive model parameters. The simulation results show that phytoplankton biomass (CHL), DMS, its precursor dimethylsulfoniopropionate (DMSP) and DMS sea-air flux all reach their seasonal maxima in early April with smaller peaks in June and August. Spatial mean DMS ranges from 2.1–10.8 nM with a mean value of 3.8 nM; spatial mean DMS flux ranges from 2.5–10.4 umole/m2/day with a mean value of 5.43 μmole/m2/day. The validation test results indicate that our simulation results are closer to the field data comparing to calculation results from Simó's formula. The high simulated DMS sea-air flux on the coastal shelf suggest that the DMS cycle in the ECMS is potentially important to the regional climate and should not be ignored.
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    Journal Title
    Journal of Marine Systems
    Volume
    212
    DOI
    https://doi.org/10.1016/j.jmarsys.2020.103450
    Copyright Statement
    © 2020 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Oceanography
    Science & Technology
    Physical Sciences
    Life Sciences & Biomedicine
    Geosciences, Multidisciplinary
    Marine & Freshwater Biology
    Publication URI
    http://hdl.handle.net/10072/405113
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    • Journal articles

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