The California Current System: A multiscale overview and the development of a feature-oriented regional modeling system (FORMS)

Gangopadhyay, Avijit; Lermusiaux, Pierre F. J.; Rosenfeld, Leslie K.; Robinson, Allan R.; Calado, Leandro; Kim, Hyun Sook; Leslie, Wayne G.; Haley, Patrick J.

doi:10.1016/j.dynatmoce.2011.04.003

Cited by 34 publications

(13 citation statements)

References 126 publications

(77 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The comparison with VERTEX results is justified since Point Sur has been identified as an area of frequent filament development (Abbot and Barksdale, 1991;Gangopadhyay et al, 2011); furthermore, chlorophyll fields mapped using the NASA Coastal Zone Color Scanner in June 1984, although few, confirm a filament structure near V-1 at the time of sampling.…”

Section: Comparison With Other Studiesmentioning

confidence: 96%

Carbon Export and Fate Beneath a Dynamic Upwelled Filament off the California Coast

Bourne¹,

Bishop²,

Connors³

et al. 2020

Preprint

View full text Add to dashboard Cite

Abstract. To understand the vertical variations of carbon fluxes in biologically productive waters, four autonomous Carbon Flux Explorers (CFEs) and ship-lowered CTD-interfaced particle-sensitive transmissometer and scattering sensors were deployed in a filament of offshore flowing recently upwelled water during the June 2017 California Current Ecosystem – Long Term Ecological Research process study. The Lagrangian CFEs operating at depths from 100–500 m yielded carbon flux and its partitioning with size from 30 µm–1 cm at three intense study locations within the filament and at a location outside the filament. Different particle classes (anchovy pellets, copepod pellets and > 1000 µm aggregates) dominated the 100–150 m fluxes during successive stages of the filament evolution as it progressed offshore. Fluxes were very high at all locations in the filament; below 150 m, flux was invariant or increased with depth at the two locations closer to the coast. Martin curve b factors for total particulate carbon flux were +0.1, +0.87, −0.27, and −0.39 at the three successively occupied locations within the plume, and in transitional waters, respectively. Particle transfer efficiencies between 100 to 500 m were far greater within both filament and California Current waters than calculated using a classic Martin b factor of −0.86. Interestingly, the flux profiles for all particles 90 %) of particle flux was carried by > 1000 µm sized aggregates. Mechanisms to explain a factor of three flux increase between 150 and 500 m at the mid plume location are investigated.

show abstract

Section: Comparison With Other Studiesmentioning

confidence: 96%

Carbon Export and Fate Beneath a Dynamic Upwelled Filament off the California Coast

Bourne¹,

Bishop²,

Connors³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…As the hydrography and its variability of the California Current System (CCS) has been described in the past by many authors (see e.g. Hickey, 1979;Lynn and Simpson, 1987;Strub and James, 2000;Centurioni et al, 2008;Checkley and Barth, 2009;Gangopadhyay et al, 2011;Kämpf and Chapman, 2016, and references therein), we only want to give a brief description of the CCS in order to provide the background for evaluating the hydrodynamic model features presented below.…”

Section: The California Current Systemmentioning

confidence: 99%

A modelling study of hydrodynamical and biogeochemical processes within the California Upwelling System

Lettmann,

Hahner,

Schakau

et al. 2020

Preprint

View full text Add to dashboard Cite

The ROMS modeling system was applied to the California Upwelling System (CalUS) to understand the key hydrodynamic conditions and dynamics of the nitrogen-based ecosystem using the NPZD model proposed by Powell et al. (2006). A new type of sponge layer has been successfully implemented in the ROMS modelling system in order to stabilize the hydrodynamic part of the modeling system when using so-called "reduced" boundary conditions. The hydrodynamic performance of the model was examined using a tidal analysis based on tidal measurement data, a comparison of the modeled sea surface temperature (SST) with buoy and satellite data, and vertical sections of the currents along the coast and the water temperature. This validation process shows that the hydrodynamic module used in this study can reproduce the basic hydrodynamic and circulation characteristics within the CalUS. The results of the ecosystem model show the characteristic features of upwelling regions as well as the well-known spotty horizontal structures of the zooplankton community. The model thus provides a solid basis for the hydrodynamic and ecological characteristics of the CalUS and enables the ecological model to be expanded into a complex ecological model for investigating the effects of climate change on the ecological balance in the area investigated.

show abstract

“…Thus, the FORMS technique allows the model setup from a dynamically adjusted initial field, e.g., the simulation starts from a desired scenario. A detailed discussion of the FORMS technique can be found in Gangopadhyay et al (2011) and Calado et al (2008).…”

Section: Feature-oriented Regional Modeling System (Forms)mentioning

confidence: 99%

Upwelling regime off the Cabo Frio region in Brazil and impact on acoustic propagation

Calado

Rodríguez

Codato

et al. 2018

The Journal of the Acoustical Society of America

Self Cite

View full text Add to dashboard Cite

This work introduces a description of the complex upwelling regime off the Cabo Frio region in Brazil and shows that ocean modeling, based on the feature-oriented regional modeling system (FORMS) technique, can produce reliable predictions of sound speed fields for the corresponding shallow water environment. This work also shows, through the development of simulations, that the upwelling regime can be responsible for the creation of shadow coastal zones, in which the detection probability is too low for an acoustic source to be detected. The development of the FORMS technique and its validation with real data, for the particular region of coastal upwelling off Cabo Frio, reveals the possibility of a sustainable and reliable forecast system for the corresponding (variable in space and time) underwater acoustic environment.

show abstract

The California Current System: A multiscale overview and the development of a feature-oriented regional modeling system (FORMS)

Cited by 34 publications

References 126 publications

Carbon Export and Fate Beneath a Dynamic Upwelled Filament off the California Coast

Carbon Export and Fate Beneath a Dynamic Upwelled Filament off the California Coast

A modelling study of hydrodynamical and biogeochemical processes within the California Upwelling System

Upwelling regime off the Cabo Frio region in Brazil and impact on acoustic propagation

Contact Info

Product

Resources

About