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Título: | Diagnostic modeling of dimethylsulfide production in coastal water west of the Antarctic Peninsula |
Autor: | Herrmann, Maria; Najjar, R.G.; Neeley, Aimee R.; Vila-Costa, Maria CSIC ORCID; Dacey, J.W.H.; DiTullio, G.R.; Kieber, David J.; Kiene, Ronald P.; Matrai, Patricia; Simó, Rafel CSIC ORCID ; Vernet, Maria | Palabras clave: | Dimethylsulfide DMS Dimethylsulfoniopropionate DMSP Antarctic Peninsula Palmer Station |
Fecha de publicación: | ene-2012 | Editor: | Elsevier | Citación: | Continental Shelf Research 32(1): 96-109 (2012) | Resumen: | The rate of gross biological dimethylsulfide (DMS) production at two coastal sites west of the Antarctic Peninsula, off Anvers Island, near Palmer Station, was estimated using a diagnostic approach that combined field measurements from 1 January 2006 through 1 March 2006 and a one-dimensional physical model of ocean mixing. The average DMS production rate in the upper water column (0–60 m) was estimated to be 3.1±0.6 nM d−1 at station B (closer to shore) and 2.7±0.6 nM d−1 at station E (further from shore). The estimated DMS replacement time was on the order of 1 d at both stations. DMS production was greater in the mixed layer than it was below the mixed layer. The average DMS production normalized to chlorophyll was 0.5±0.1 (nM d−1)/(mg m−3) at station B and 0.7±0.2 (nM d−1)/(mg m−3) at station E. When the diagnosed production rates were normalized to the observed concentrations of total dimethylsulfoniopropionate (DMSPt, the biogenic precursor of DMS), we found a remarkable similarity between our estimates at stations B and E (0.06±0.02 and 0.04±0.01 (nM DMS d−1)/(nM DMSP), respectively) and the results obtained in a previous study from a contrasting biogeochemical environment in the North Atlantic subtropical gyre (0.047±0.006 and 0.087±0.014 (nM DMS d−1)/(nM DMSP) in a cyclonic and anticyclonic eddy, respectively). We propose that gross biological DMS production normalized to DMSPt might be relatively independent of the biogeochemical environment, and place our average estimate at 0.06±0.01 (nM DMS d−1)/(nM DMSPt). The significance of this finding is that it can provide a means to use DMSPt measurements to extrapolate gross biological DMS production, which is extremely difficult to measure experimentally under realistic in situ conditions. | Descripción: | 14 pages, 10 figures, 3 tables | Versión del editor: | https://doi.org/10.1016/j.csr.2011.10.017 | URI: | 10261/44792 | DOI: | 10.1016/j.csr.2011.10.017 | ISSN: | 0278-4343 | E-ISSN: | 1873-6955 |
Aparece en las colecciones: | (ICM) Artículos (CEAB) Artículos |
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