Introduction.- 1 Climate variability in the north-western Iberian Peninsula during the last deglaciation.- 2 Impact of Oporto Metropolitan Area carbon dioxide emissions over the adjacent coastal zone.- 3 Present day carbon dioxide fluxes in the coastal ocean and possible feedbacks under global change.- 4 Aspects of phytoplankton communities response to climate changes.- 5 pH decrease and effects on the chemistry of seawater .- 6 Effects of sediment...