The spatial distribution of CO2 fluxes results from the superposition of several processes, including: (i) the properties of Atlantic water incoming though the Gibraltar strait and their spreading over the western Mediterranean by physical processes (advection and diffusion), which is the main driver of the above mentioned west-east gradient, (ii) a latitudinal gradient in Obviously, a future increase of atmospheric partial pressure of CO2 would trigger an increase in CO2 sequestration (or a decrease in its release), partially compensated by the decrease of CO2 solubility related to warming. However, a projection of the cumulative impact of climate changes on this process requires an ad hoc simulation, also considering changes in circulation, vertical mixing, and other physical processes.
Our simulations highlight the important role of the biological pump in carbon sequestration, which accounts for 14.82 million tonCO2/km2/year. The biological fluxes over the Mediterranean follow a clearly different distribution pattern compared to the total fluxes. In particular as shown in Fig. 4, with the exception of the Alboran Sea, the net annual flux is the balance between winter positive fluxes and summer negative fluxes. Biological activity produces a modest effect if compared to seasonal oscillation, but
– being always positive – it shifts systematically the oscillation towards higher fluxes, so it is important when accounting for the
The spatial distribution of CO2 fluxes results from the superposition of several processes, including: (i) the properties of Atlantic water incoming though the Gibraltar strait and their spreading over the western Mediterranean by physical processes (advection and diffusion), which is the main driver of the above mentioned west-east gradient, (ii) a latitudinal gradient in Obviously, a future increase of atmospheric partial pressure of CO2 would trigger an increase in CO2 sequestration (or a decrease in its release), partially compensated by the decrease of CO2 solubility related to warming. However, a projection of the cumulative impact of climate changes on this process requires an ad hoc simulation, also considering changes in circulation, vertical mixing, and other physical processes.Our simulations highlight the important role of the biological pump in carbon sequestration, which accounts for 14.82 million tonCO2/km2/year. The biological fluxes over the Mediterranean follow a clearly different distribution pattern compared to the total fluxes. In particular as shown in Fig. 4, with the exception of the Alboran Sea, the net annual flux is the balance between winter positive fluxes and summer negative fluxes. Biological activity produces a modest effect if compared to seasonal oscillation, but– being always positive – it shifts systematically the oscillation towards higher fluxes, so it is important when accounting for the
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