A series of eddy-resolving ocean simulations in the world ocean - OFES (OGCM for the Earth Simulator) project

Sasaki, Hideharu; Sasai, Yoshikazu; Kawahara, Shintaro; Furuichi, Mikito; Araki, Fumiyuki; Ishida, Akio; Yamanaka, Yasuhiro; Masumoto, Yukio; Sakuma, Hirofumi

doi:10.1109/oceans.2004.1406350

Cited by 59 publications

(54 citation statements)

References 9 publications

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“…The OFES model is nearly global (75°S ∼ 75°N) and has a horizontal resolution of 0.1°b oth in latitude and longitude [cf. Sasaki et al, 2004]. Forced by the NCEP reanalysis surface fluxes, the model is integrated from 1950 to 2003.…”

Section: Methodsmentioning

confidence: 99%

Anti‐correlated variability in subduction rate of the western and eastern North Pacific Oceans identified by an eddy‐resolving ocean GCM

Chen

Sasaki

et al. 2010

Geophysical Research Letters

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Analysis of results from an eddy‐resolving ocean general circulation model has revealed the existence of an anti‐correlated variability in subduction rate of the western and eastern North Pacific Oceans, consistent with the leading mode of Pacific Decadal Oscillation (PDO). A composite analysis shows that during the positive phase of PDO, the winter mixed layer depth (MLD) generally gets deeper in the west and shallower in the east, being closely related to the variability in surface heat flux stemming from an enhanced Aleutian Low, and the situation during the negative phase of PDO is reversed. Changes in MLD are primarily responsible for the anti‐correlated variability in subduction rate, though changes in subtropical gyre circulation also play a role. The result also provides useful evidence for the interior and western boundary pathways, through which variability in eastern subtropical mode water can be conveyed into the equatorial region.

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Section: Methodsmentioning

confidence: 99%

Anti‐correlated variability in subduction rate of the western and eastern North Pacific Oceans identified by an eddy‐resolving ocean GCM

Chen

Sasaki

et al. 2010

Geophysical Research Letters

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“…Results from the eddy-resolving Oceanic General Circulation Model (OGCM) for the Earth Simulator (OFES) Sasaki et al 2004) are used. The model is based on the Modular Ocean Model (MOM3) (Pacanowski and Griffies 2000), with a near-global domain extending from 75°S to 75°N.…”

Section: Eddy-resolving Modelmentioning

confidence: 99%

Intra-seasonal variability of Pacific-origin sea level anomalies around the Philippine Archipelago

et al. 2015

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“…At the lateral open boundaries of the parent grid, we imposed a modified radiation boundary condition (Marchesiello et al, 2001) with adjustment to the monthly mean climatology provided by the highresolution MOM3-based Ocean General Circulation Model code optimized for the Earth Simulator (OFES; global 0.1° ocean circulation model, Masumoto et al, 2004;Sasaki et al, 2004Sasaki et al, , 2008 To identify the model ITEs' main spatial and temporal variability in the study region, we applied a the MultiTaper Method-Singular Value Descomposition (MTM-SVD) method, which combines the multitaper method (Multitaper Method, MTM), and the singular value decomposition method (Singular Value Descomposition, SVD), which allows the description of spatial characteristics for the frequencies of interest through reconstruction (Mann & Park, 1999;CorreaRamírez & Hormazábal, 2012). A detailed guide to the features of the aforementioned method can be found in .…”

Section: Data Modelmentioning

confidence: 99%

Intrathermocline eddies at the Juan Fernandez Archipelago, southeastern Pacific Ocean

Andrade

Hormazábal

Combes

2014

lajar

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ABSTRACT. Regional Ocean Modeling System (ROMS) results, combined with chlorophyll-a (Chl-a) and satellite altimetry information as well as information from oceanographic cruises were analyzed to identify interactions between intrathermocline eddies (ITEs) and the Juan Fernández Archipelago (JFA), and discuss their potential impact on surface Chl-a concentrations. The JFA is located off the coast of central Chile (33°S), and is composed of three main islands: Robinson Crusoe (RC), Alejandro Selkirk (AS) and Santa Clara (SC). Results indicate that the surface and subsurface anticyclonic eddies that interact with the JFA are formed primarily within the coastal transition zone between 33° and 39°S. ITEs are present within the JFA region with a semiannual frequency, mainly during the austral autumn, and have a weak surface expression in relation to the adjacent surface eddies, with a slow displacement (1.16 to 1.4 km d -1 ) in a northwest direction and a coherent structure for periods of ≥1 year. During the ITEs' interaction with RC-SC islands and an adjacent seamount, a slight (prominent) thermocline deflection of the upper limit (lower) was observed. The horizontal extent (~70-100 km) was greater than the internal Rossby deformation radius and the average vertical extent was ~400 m. The interaction between the weak surface expression of ITEs, identified with satellite altimetry, and the JFA persisted during autumn for nine weeks until reaching the winter period. Approximately one month after the beginning of the interaction between ITEs and the islands, increases in surface Chl-a associated with the eddy were observed, with values up to three times higher than adjacent oceanic waters. Keywords: intrathermocline eddies, Juan Fernández Archipelago, southeastern Pacific Ocean. Remolinos intratermoclina en el Archipiélago Juan Fernández,Océano Pacífico suroriental RESUMEN. Se analizaron los resultados de un modelo oceánico regional (ROMS), combinado con información de clorofila-a (Clo-a) y altimetría satelital, además de información proveniente de cruceros oceanográficos, para identificar la interacción entre los remolinos intratermoclina (ITEs) y el Archipiélago Juan Fernández (AJF), y discutir su potencial impacto sobre las concentraciones de Clo-a superficial. El AJF se encuentra ubicado frente a la costa central de Chile (33°S), y está conformado por las islas Robinson Crusoe, Santa Clara y Alejandro Selkirk. Los resultados indican que los remolinos anticiclónicos superficiales y subsuperficiales que interactúan con el AJF se forman principalmente en la zona de transición costera entre 33° y 39°S. Los ITEs se presentan en la región del AJF con una frecuencia semianual, principalmente durante el período de otoño austral, y poseen una débil expresión superficial respecto de los remolinos superficiales adyacentes, un lento desplazamiento (1,16-1,4 km d -1) con dirección noroeste y una estructura coherente por períodos ≥1 año. Durante la interacción de los ITEs con las islas RC-SC y el monte submarino adyacente, se ob...

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A series of eddy-resolving ocean simulations in the world ocean - OFES (OGCM for the Earth Simulator) project

Cited by 59 publications

References 9 publications

Anti‐correlated variability in subduction rate of the western and eastern North Pacific Oceans identified by an eddy‐resolving ocean GCM

Anti‐correlated variability in subduction rate of the western and eastern North Pacific Oceans identified by an eddy‐resolving ocean GCM

Intra-seasonal variability of Pacific-origin sea level anomalies around the Philippine Archipelago

Intrathermocline eddies at the Juan Fernandez Archipelago, southeastern Pacific Ocean

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