Spatial and temporal variation of satellite-derived phytoplankton biomass and production in the California Current System off Punta Eugenia, during 1997-2012

The great biodiversity of the California Current System area off Punta Eugenia is supported by high phytoplankton production (PP) caused by coastal upwelling. Satellite imagery was used to characterize the sea surface temperature (SST), phytoplankton biomass (Chl(sat)), and PP variation in this area during 1997-2012, and to generate a first approximation to its climatology, or an "average year." Chl(sat) and PP had higher values inshore (0-120 km from shore) than offshore. SST had minima inshore and maxima offshore from January through October, with a gradient reversal at the end of autumn. SST often presented spatial distributions with minima and maxima suggesting mesoscale phenomena, such as meanders and eddies. These affected Chl(sat) and PP inshore. In general, inshore Chl(sat) and PP were high in March-August (up to >5 mg m(-3), and >3.5 g C m(-2) d(-1)), and low in September-February (up to similar to 1.2 mg m(-3), and similar to 1.2 g C m(-2) d(-1)). Offshore (120-240 km), Chl(sat) and PP presented similar and relatively low values throughout the whole year, similar to 0.3 mg m(-3) and similar to 0.5 g C m(-2) d(-1). Most Chl(sat) and PP variation was in the annual and interannual periods. Chl(sat) data from 1998 (El Nino year) and those of 2000 presented significant differences for the inshore region. But, when comparing other El Nino years, there were no significant differences, suggesting that the local impact of ENSO events depend on the type of El Nino, the Pacific decadal oscillation phase, and the incidence of mesoscale phenomena such as meanders and eddies.