scholarly journals Phytoplankton size structure during and after the 1997/98 El Niño in a coastal upwelling area of the northern Humboldt Current System

2004 ◽  
Vol 269 ◽  
pp. 83-90 ◽  
Author(s):  
JL Iriarte ◽  
HE González
Keyword(s):  
El Niño ◽  
Coastal Upwelling ◽  
Size Structure ◽  
El Nino ◽  
Current System ◽  
Humboldt Current ◽  
Phytoplankton Size ◽  
Humboldt Current System ◽  
Upwelling Area ◽  
Phytoplankton Size Structure

scholarly journals The 1997/98 El Niño in the Humboldt Current System: a Synthesis

2002 ◽  
Vol 30 (1) ◽  
Author(s):  
R. Escribano ◽  
G. Daneri ◽  
L. Farías ◽  
V. A. Gallardo ◽  
H. González ◽  
...  
Keyword(s):  
El Niño ◽  
El Nino ◽  
Current System ◽  
Humboldt Current ◽  
System A ◽  
Humboldt Current System

scholarly journals Imprint of El Niño/La Niña Cycles on the Humboldt Current System

2002 ◽  
Vol 30 (1) ◽  
Author(s):  
Gary Shaffer ◽  
Oscar Pizarro ◽  
Samuel Hormazabal ◽  
Silvia Venegas
Keyword(s):  
El Niño ◽  
El Nino ◽  
Current System ◽  
La Niña ◽  
Humboldt Current ◽  
La Nina ◽  
Humboldt Current System

Chlorophyll-a distribution and mesoscale physical processes in upwelling and adjacent oceanic zones off northern Chile (summer–autumn 1994)

2001 ◽  
Vol 81 (2) ◽  
pp. 193-206 ◽  
Author(s):  
Carmen E. Morales ◽  
José L. Blanco ◽  
Mauricio Braun ◽  
Nelson Silva
Keyword(s):  
Coastal Upwelling ◽  
Current System ◽  
Austral Summer ◽  
Nutrient Concentrations ◽  
Northern Chile ◽  
Humboldt Current ◽  
Oxygen Conditions ◽  
Salinity Water ◽  
Humboldt Current System ◽  
Seasonal Signal

Chlorophyll-a (chl-a) distribution and associated physical (temperature, salinity) and chemical (dissolved oxygen) conditions off northern Chile (Humboldt Current System), during the austral summer (February–March) and autumn (May) of 1994, were studied in the region bounded by ∼18–24°S and 70–72°W (out to ∼200 km from the coast; 0–100 m depth); within this region, nutrients were measured in an area of persistent coastal upwelling (∼19–22°S, out to 80 km from the coast). Temperature and salinity distributions, as well as nutrient concentrations, indicated the occurrence of active upwelling during both cruises. Also, and together with maps of geopotential anomaly (0/200 dbar) and depth of the thermocline (15°C isotherm), their distribution suggested the presence of a mainly equatorward flow, anticyclonic eddy-like structures, and intrusions of warm (>19°C), high salinity (>35·0 psu), subtropical water towards the coast. A tongue of cooler and lower salinity water, and of lower flow fields, extended from the coast towards the offshore zone during both sampling periods, in association with higher chl-a concentrations (>1 mg m−3, >20 mg m−2 between 0 and 25 m depth) and predominance of net-phytoplankton (>20 μm). The comparison of these results with those for the winter and spring of 1993 in the same area suggest a relatively weak seasonal signal in chl-a concentration during the 1993–1994 period, with higher water column concentrations during the summer and spring periods in the selected upwelling area, though surface chl-a concentrations for the whole of the area did not vary significantly.

Nearshore circulation in a coastal upwelling site off the Northern Humboldt current system

2001 ◽  
Vol 21 (13-14) ◽  
pp. 1317-1329 ◽  
Author(s):  
Victor H. Marı́n ◽  
Ruben Escribano ◽  
Luisa E. Delgado ◽  
Gonzalo Olivares ◽  
Pamela Hidalgo
Keyword(s):  
Coastal Upwelling ◽  
Current System ◽  
Humboldt Current ◽  
Nearshore Circulation ◽  
Humboldt Current System

scholarly journals Upwelling modulation of functional traits of a dominant planktonic grazer during “warm-acid” El Niño 2015 in a year-round upwelling area of Humboldt Current

PLoS ONE ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. e0209823 ◽  
Author(s):  
Victor M. Aguilera ◽  
Ruben Escribano ◽  
Cristian A. Vargas ◽  
M. Teresa González
Keyword(s):  
Functional Traits ◽  
El Niño ◽  
El Nino ◽  
Humboldt Current ◽  
Upwelling Area

scholarly journals CO<sub>2</sub>-driven compromises to marine life along the Chilean coast

2010 ◽  
Vol 7 (6) ◽  
pp. 8895-8918 ◽  
Author(s):  
E. Mayol ◽  
S. Ruiz-Halpern ◽  
C. M. Duarte ◽  
J. C. Castilla ◽  
J. L. Pelegrí
Keyword(s):  
Water Column ◽  
Mixed Layer ◽  
Current System ◽  
Humboldt Current ◽  
Marine Life ◽  
Small Water ◽  
System A ◽  
Humboldt Current System ◽  
Upper Mixed Layer ◽  
Upwelling Area

Abstract. CO2-driven compromises to marine life were examined along the Chilean sector of the Humboldt Current System, a particularly vulnerable hypoxic and upwelling area, applying the Respiration index (RI = log10 pO20.7) declining by half between 42° S and 28° S. The intermediate waters hardly reached those stations closer to the equator so that the increased pCO2 lowered pH and the saturation of aragonite. A significant fraction of the water column along the Chilean sector of the Humboldt Current System suffers from CO2–driven compromises to biota, including waters corrosive to calcifying organisms, stress to aerobic organisms or both. The habitat free of CO2-driven stresses was restricted to the upper mixed layer and to small water parcels at about 1000 m depth. pCO2 acts as a hinge connecting respiratory and calcification challenges expected to increase in the future, resulting in a spread of the challenges to aerobic organisms.

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