Global Ocean dimethylsulfide photolysis rates quantified with a spectrally and vertically resolved model
10 pages, 3 figures, 1 table, supporting information https://doi.org/10.1002/lol2.10342.-- Data availability statement: The data and code necessary to reproduce the article’s results and figures are available in https://doi.org/10.5281/zenodo.7890912
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Association for the Sciences of Limnology and Oceanography
2023-10
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dig-icm-es-10261-3377512023-10-26T01:45:09Z Global Ocean dimethylsulfide photolysis rates quantified with a spectrally and vertically resolved model Galí, Martí Devred, Emmanuel Pérez, Gonzalo L. Kieber, David J. Simó, Rafel 10 pages, 3 figures, 1 table, supporting information https://doi.org/10.1002/lol2.10342.-- Data availability statement: The data and code necessary to reproduce the article’s results and figures are available in https://doi.org/10.5281/zenodo.7890912 Photochemical reactions initiated by ultraviolet radiation remove the climate-active gas dimethylsulfide (DMS) from the ocean's surface layer. Here, we quantified DMS photolysis using a satellite-based model that accounts for spectral irradiance attenuation in the water column, its absorption by chromophoric dissolved organic matter, and the apparent quantum yields (AQYs) with which absorbed photons degrade DMS. Models with two alternative parameterizations for AQY estimate global DMS photolysis at between 17 and 20 Tg S yr−1, equivalent to 13–15 Tg C yr−1, of which ~ 73% occurs in the Southern hemisphere. This asymmetry results mostly from the high AQYs found south of 40° S, which more than counteract the prevailing low irradiance and deep mixing in that region. Simplified schemes currently used in biogeochemical models, whereby photolysis follows the vertical attenuation of visible radiation, overestimate DMS photolysis by around 150% globally. We propose relevant corrections and simple adjustments to those models MG received funding from a Beatriu de Pinós postdoctoral fellowship (2013 BP-A 00098, AGAUR, Generalitat de Catalunya) and the project DMS-Cons (PIE 202230I123, Spanish Government). RS received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Project ERC-2018-AdG Grant Agreement No. 834162). The Institute of Marine Sciences (ICM-CSIC) is supported by a “Severo Ochoa” Centre of Excellence grant (CEX2019-000928-S) from the Spanish government Peer reviewed 2023-10-25T11:48:50Z 2023-10-25T11:48:50Z 2023-10 artículo http://purl.org/coar/resource_type/c_6501 Limnology and Oceanography : Letters 8(5): 760-769 (2023) CEX2019-000928-S http://hdl.handle.net/10261/337751 10.1002/lol2.10342 2378-2242 en Publisher's version https://doi.org/10.1002/lol2.10342 Sí open Association for the Sciences of Limnology and Oceanography |
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10 pages, 3 figures, 1 table, supporting information https://doi.org/10.1002/lol2.10342.-- Data availability statement: The data and code necessary to reproduce the article’s results and figures are available in https://doi.org/10.5281/zenodo.7890912 |
| format |
artículo |
| author |
Galí, Martí Devred, Emmanuel Pérez, Gonzalo L. Kieber, David J. Simó, Rafel |
| spellingShingle |
Galí, Martí Devred, Emmanuel Pérez, Gonzalo L. Kieber, David J. Simó, Rafel Global Ocean dimethylsulfide photolysis rates quantified with a spectrally and vertically resolved model |
| author_facet |
Galí, Martí Devred, Emmanuel Pérez, Gonzalo L. Kieber, David J. Simó, Rafel |
| author_sort |
Galí, Martí |
| title |
Global Ocean dimethylsulfide photolysis rates quantified with a spectrally and vertically resolved model |
| title_short |
Global Ocean dimethylsulfide photolysis rates quantified with a spectrally and vertically resolved model |
| title_full |
Global Ocean dimethylsulfide photolysis rates quantified with a spectrally and vertically resolved model |
| title_fullStr |
Global Ocean dimethylsulfide photolysis rates quantified with a spectrally and vertically resolved model |
| title_full_unstemmed |
Global Ocean dimethylsulfide photolysis rates quantified with a spectrally and vertically resolved model |
| title_sort |
global ocean dimethylsulfide photolysis rates quantified with a spectrally and vertically resolved model |
| publisher |
Association for the Sciences of Limnology and Oceanography |
| publishDate |
2023-10 |
| url |
http://hdl.handle.net/10261/337751 |
| work_keys_str_mv |
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