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Multiscale upwelling forcing cycles and biological response off north-central Chile RChHN
RUTLLANT,JOSÉ; MONTECINO,VIVIAN.
The physical forcing of the upwelling along the subtropical west coasts of the continents encompasses a broad range of time scales which shape both phytoplankton biomass (Chl-a) and primary productivity (carbon fixation) changes over any given time interval. The narrow continental shelf and the steep alongshore orography off north-central Chile provide for a unique combination of year-round, upwelling-favorable winds with quasi-weekly upwelling pulses associated with atmospheric coastal-trapped disturbances (coastal lows). This variability is modulated by intraseasonal oscillations in the depth of the thermo/nutricline, produced by coastal-trapped waves in the ocean, upon which annual (seasons) and interannual (ENSO) cycles are superimposed. During coastal...
Tipo: Journal article Palavras-chave: Chile; Coastal upwelling; Phytoplankton; Local and remote upwelling forcing cycles; Coastal-trapped waves; ENSO cycle.
Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100020
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