Subsurface oxygen maximum in oligotrophic marine ecosystems: mapping the interaction between physical and biogeochemical processes
نویسندگان
چکیده
Abstract. The subsurface oxygen maximum (SOM) is observed in oligotrophic oceans and associated with different physical biological processes. This study characterizes the SOM Mediterranean Sea at basin scale investigates its driving mechanisms by analysing output of 1/24∘ resolution biogeochemical reanalysis provided Copernicus Marine Service for 1999–2019 time period. We validated model-derived concentration epipelagic layer spatial temporal scales, including novel process comparisons estimates from situ observations. Moreover, using Biogeochemical Argo (BGC-Argo) float observations, we estimated model uncertainty reproducing depth summer (13 mmol O2 m−3 13 m, respectively). western eastern depicts signatures summer, higher values shallower depths Mediterranean. concentrations (in ranges 230–250 30–100 respectively) are agreement estimations literature show mesoscale variability patterns. also shows a stronger activity, specifically production consumption, along whole surface throughout year, but heavy undersaturated waters winter deep convection northwestern Sea. A 1-year analysis conducted on selected areas that representative heterogeneity highlighted can actually be sustained (as areas), or it residual confinement spring central Ionian area) vertical motions influence Levantine subduction area).
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ژورنال
عنوان ژورنال: Biogeosciences
سال: 2022
ISSN: ['1726-4189', '1726-4170']
DOI: https://doi.org/10.5194/bg-19-5553-2022