ENSO modulation of the upwelling season off southern‐central Chile

Montecinos, Aldo; Gómez, Fabián A.

doi:10.1029/2009gl041739

Cited by 29 publications

(26 citation statements)

References 18 publications

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“…Para ambas islas, la clor-a presentó incrementos significativos de varianza (>99%) en una amplia banda centrada en el ciclo anual (315-511 días). La amplitud de esta banda en el espectro, ha sido asociada al corrimiento (retraso/adelanto) del inicio de la estación del año (Montecinos & Gómez, 2010;Correa-Ramirez et al, 2012). Esta banda anual también presentó incrementos significativos (>99%) en los espectros del nivel del mar y energía cinética .…”

Section: Resultsunclassified

Ciclo anual de la clorofila a satelital en el archipielago de Juan Fernandez (33 S), Chile

Andrade¹,

Hormazábal²,

Correa-Ramírez³

2012

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Section: Resultsunclassified

Ciclo anual de la clorofila a satelital en el archipielago de Juan Fernandez (33 S), Chile

Andrade¹,

Hormazábal²,

Correa-Ramírez³

2012

lajar

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“…For instance, at interannual time scales, El Niño Southern Oscillation (ENSO) has been shown to influence the upwelling off Peru [ Colas et al ., ; Dewitte et al ., ] and Chile [ Pizarro et al ., ; Vega et al ., ] through oceanic teleconnections. ENSO atmospheric teleconnections have also been shown to drive anomalous upwelling conditions off Central Chile [ Montecinos and Gomez , ; Goubanova et al ., ; Rahn , ], whereas off Peru, they are more ubiquitous [ Goubanova et al ., ]. Most studies on upwelling variability in the Humboldt system and its connection with the equatorial variability have focused on the analysis of coastal sea level and current (cf.…”

Section: Introductionmentioning

confidence: 99%

Forcing mechanisms of intraseasonal SST variability off central Peru in 2000–2008

et al. 2014

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A heat budget analysis further reveals that during the Austral summer, despite the weak along-shore upwelling (downwelling) favorable wind stress anomalies, significant cool (warm) SST anomalies along the coast are to a large extent driven by Ekman-induced advection. This is shown to be due to the shallow mixed layer that increases the efficiency by which wind stress anomalies relates to SST through advection. Diabatic processes also contribute to the SST intraseasonal regime, which tends to shorten the lag between peak SST and wind stress anomalies compared to what is predicted from an advective mixed-layer model.

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“…The factors affecting NPP off central Chile and the effect of processes such as the ENSO cycle (El Niño (EN) and La Niña (LN) events) on the upwelling and the precipitation regime are poorly understood (Montecinos and Aceituno, 2003;Montecinos and Gomez, 2010), and information regarding biological productivity and phytoplankton phenology remains lacking (Corredor-Acosta et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Temporal Variability in Net Primary Production in an Upwelling Area off Central Chile (36°S)

Testa

Masotti

2018

Front. Mar. Sci.

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The temporal variability of Net Primary Production (NPP) off central Chile (36 • S, 73 • W), an area subjected to seasonal coastal upwelling, was analyzed using monthly in situ 13 C incubations within the photic zone, along with bio-oceanographic variables from a fixed time series station; and satellite NPP estimations (NPPE) from the Vertically Generalized Production Model between 2006 and 2015. NPP and NPPE rates varied from 0.03 to 18.29 and from 0.45 to 9.07 g C m −2 d −1 , respectively. Both rates were fairly well correlated with each other (r 2 = 0.61), but when these data were separated into two periods, higher r 2 value was found during winter (r 2 = 0.70) with respect to the rest of the year (r 2 = 0.24); the latter correlation was partially due to increased weekly NPPE variability during active and relaxed upwelling events. NPP rates along with other biophysical variables allowed for a division of the annual cycle into three distinct periods: September to January (high productivity, mean integrated NPP rates of 4.0 g C m −2 d −1 ), February to March (intermediate productivity, mean integrated NPP rates of 1.4 g C m −2 d −1 ), and May to August (basal level, mean integrated NPP rates of 0.5 g C m −2 d −1 ). NPP appeared to be partially controlled by nutrient inputs, either from upwelling (September-April) and river discharge (May-August), maintaining high NPP rates throughout the entire year, with an annual mean NPP rate of 1.1 kg C m −2 yr −1 . In this region, El Niño Southern Oscillation events did not appear to impact the NPP interannual variability.

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ENSO modulation of the upwelling season off southern‐central Chile

Cited by 29 publications

References 18 publications

Ciclo anual de la clorofila a satelital en el archipielago de Juan Fernandez (33 S), Chile

Ciclo anual de la clorofila a satelital en el archipielago de Juan Fernandez (33 S), Chile

Forcing mechanisms of intraseasonal SST variability off central Peru in 2000–2008

Temporal Variability in Net Primary Production in an Upwelling Area off Central Chile (36°S)

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