A5003546218- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Climate variability and models
- Geology and Paleoclimatology Research
- Marine and fisheries research
- Marine Biology and Ecology Research
- Methane Hydrates and Related Phenomena
- Marine Bivalve and Aquaculture Studies
- Geological and Geophysical Studies
- Ocean Waves and Remote Sensing
- Arctic and Antarctic ice dynamics
- Atmospheric and Environmental Gas Dynamics
- Offshore Engineering and Technologies
- Hydrocarbon exploration and reservoir analysis
- Geological formations and processes
- Crustacean biology and ecology
- Marine Ecology and Invasive Species
- Ocean Acidification Effects and Responses
- Marine and coastal plant biology
- Coastal wetland ecosystem dynamics
- Water Quality and Resources Studies
- Global Energy and Sustainability Research
- Strategic Planning and Analysis
- Oil and Gas Production Techniques
- Cavitation Phenomena in Pumps
Oregon State University
2015-2025
Mediterranean Institute for Advanced Studies
2023-2025
Universitat de les Illes Balears
2023-2025
Mediterranean Institute for Advanced Studies
2025
Weatherford College
2023
Oceanography Society
2013
Georgia Institute of Technology
2007-2010
and NPGO) clarified their largescale regional-scale dynamics.This has brought improved understanding of the mechanisms large-scale Pacific climate variability regionalscale impacts on coastal ocean marine ecosystems.
In the Northern California Current (NCC), zooplankton communities show interannual and multiyear shifts in species dominance that are tracked by survival of salmon populations. These community changes correlate with Pacific Decadal Oscillation (PDO) index: a 'warm-water' copepod group is more abundant during warm (positive) phases PDO less cold (negative) phases; reverse occurs for 'cold-water' group. The observed relationship led to hypothesis relative warm/cold-water copepods NCC driven...
Abstract This article presents the results of a high‐resolution (1/12°), two‐way nested simulation oceanic circulation in southwestern Atlantic region. A comparison between model and extant observations indicates that has skill reproducing best‐known aspects regional circulation, e.g., volume transport ACC, latitudinal position BMC, shelf break upwelling Patagonia, Zapiola Anticyclone. Sensitivity experiments indicate bottom stress parameterization significantly impacts mean location...
A high-resolution model is used to characterize the dominant patterns of sea surface salinity (SSS) variability generated by freshwater discharges Rio de la Plata (RdlP) and Patos/Mirim Lagoon in southwestern Atlantic region. We identify three modes SSS variability. The first two, which have been discussed previous studies, represent seasonal interannual variations plumes over continental shelf. third mode variability, has not hitherto, represents exchanges between shelf deep ocean....
Abstract Altimeter sea surface height (SSH) fields are analyzed to define and discuss the seasonal circulation over wide continental shelf in SW Atlantic Ocean (27°–43°S) during 2001–2012. Seasonal variability is low south of Rio de la Plata (RdlP), where winds currents remain equatorward for most year. Winds central northern parts our domain also autumn winter but reverse become poleward spring summer. Transports water deep ocean strongest summer offshore southeast RdlP. Details flow...
A high-resolution ocean model is used to characterize the local and remote driving mechanisms of variability Patagonian shelf circulation. Local forcing includes effects tides, buoyancy fluxes wind, while represents impact adjacent deep-ocean currents. There an abrupt change dynamical characteristics circulation at 40°S. South 40°S, seasonal variations are out phase with wind stress driven by deep inflows originated in Drake Passage. The inter-annual principally shows a significant...
The study of marine heat waves as extreme temperature events has a wide range applications, from gauge for ecological and socioeconomic impact to climate change indicator. Various definitions sea exist account its broad applicability, with statistical based on percentile thresholds being widespread in use. Using satellite model data the Mediterranean Sea, we analyze implications choosing baseline climatological periods threshold delineation, which are either fixed past or shifted time. We...
[1] The three-dimensional structure and the origin of mesoscale anticyclonic intrathermocline eddies (ITEs) in coastal transition zone (CTZ) off central Chile (31–41°S) were analyzed through combination data from oceanographic cruises satellite altimetry, application an eddy-resolving primitive equation ocean model coupled with a numerical experiment using passive tracer. In this region, ITEs are represented by subsurface lenses (∼100 km diameter; 500 m thickness or vertical extension)...
Satellite-derived sea surface salinity (SSS) data from Aquarius and SMOS are used to study the shelf-open ocean exchanges in western South Atlantic near 35°S. Away tropics, these cause largest SSS variability throughout Atlantic. The reveal a well-defined seasonal pattern of during analyzed period location export low-salinity shelf waters. In spring summer, waters over expand offshore transferred open primarily southeast river mouth (from 36°S 37°30′S). contrast, fall winter, extend along...
Abstract Observations show abrupt changes in the oceanic circulation of southwestern Atlantic. These studies report a southward drift Brazil/Malvinas Confluence (BMC) and change spectral characteristics Malvinas Current (MC) transport. We address cause these using result high‐resolution numerical experiment. The experiment, which is consistent with observations, shows BMC displacement at rate 0.62°/decade between 1993 2008, shift MC transport after 1999. find that are driven by weakening...
Abstract A suite of high‐resolution numerical simulations characterizes the oceanic circulation in Burdwood Bank, a shallow seamount located northeastern end Drake Passage. Model analysis shows energetic upwelling and mixing uplifting deep benthic waters into photic layer. Tides Antarctic Circumpolar Current are primary drivers bank's circulation. Tidal forcing is main driver for entrainment upper layers bank local wind detrainment these ocean. Passive tracer diagnostics suggest that...
The Southeast Pacific, which encompasses the coasts of Peru and Chile, is one world's most productive regions resulting principally from upwelling subsurface nutrient-rich waters. Over satellite altimetry era, there have been numerous evidence that surface mesoscale eddies play an important role in offshore transport rich coastal waters, but it has only recently few observational/numerical studies highlighted importance eddies. eddy field variability explored using results a high-resolution...
In the southwest South Atlantic Ocean (SWAO) strong ocean surface warming hotspots have been observed mainly along path of Brazil Current (BC), Brazil-Malvinas Confluence (BMC), and in Río de la Plata (RdlP). However, there is no knowledge about signature below potential effects on marine biota. this work, we provide initial evidence how deep SWAO extend water column, particular at mid-water bottom layers where two species ‒the green turtle (Chelonia mydas) Patagonian scallop (Zygochlamys...
Abstract The California Current System (CCS) has intense mesoscale activity that modulates and exports biological production from the coastal upwelling system. To characterize quantify ability of eddies to affect local regional planktonic ecosystem CCS, we analyzed a 10 year‐long physical‐biological model simulation, using eddy detection tracking isolate dynamics cyclonic anticyclonic eddies. As they propagate westward across shelf, efficiently transport organisms maintain locally elevated...
Abstract The northeast periphery of the Scotia Sea hosts one largest chlorophyll‐a blooms Southern Ocean. This bloom peaks to northwest island South Georgia, extending eastward for hundreds kilometers. Although Ocean has many islands similar size, Georgia is ecologically most significant: It not only sustains Ocean's and diverse ecosystems but also constitutes its single important region biological carbon sequestration. While exceptional nature Georgia's been recognized widely, both physical...
Abstract The Southwestern Atlantic Ocean (SWA), is considered one of the most productive areas world, with a high abundance ecologically and economically important fish species. Yet, biological responses this complex region to climate variability are still uncertain. Here, using 24 years satellite‐derived Chl‐a data, we classified SWA into 9 spatially coherent regions based on temporal concentration, as revealed by SOM (Self‐Organizing Maps) analysis. These biogeographical were basis...
Abstract This modeling study analyzes the circulation over Agulhas Bank (AB). It is suggested that time mean bank primarily driven by inflow of shelf waters from northeastern region, and not local forcing as previously postulated. Seasonal variations temperature salinity fields are highly correlated with atmospheric forcing. Currents shift inshore during winter, returning to its original position summer. The equatorward flow in western AB, which includes a deep, unreported, countercurrent,...
The SouthWestern Atlantic Ocean (SWA) is undergoing significant changes as a result of climate change, including progressive sea surface warming, altered wind patterns, the poleward migration western boundary currents, and an increase in frequency intensity climate-driven variability events. Within SWA, Patagonian Shelf (PS), extending from southern tip South America (~55°S) to Brazil/Malvinas Confluence (~38°S), stands out one most biologically productive regions globally...
Small-scale variability is essential to understanding ocean circulation, air-sea interactions, and biogeochemical processes. Yet, current satellite-derived sea surface salinity (SSS) data can only resolve features larger than 40 km. This study aims capture smaller scale (≤25 km) by reconstructing SSS from satellite observations. The focus on the Brazil-Malvinas Confluence (BMC), a biologically productive region characterized intense mesoscale structures associated with strong...
Mesoscale activity plays a central role in ocean variability, substantially influencing the mixing of biogeophysical tracers, such as heat and carbon, driving changes ecosystems. Eddy Kinetic Energy (EKE), metric used for studying intensity mesoscale processes, has recently been shown to increase regions intense EKE worldwide. Strong positive trends are, example, observed principal western boundary current regions, Gulf Stream, Kuroshio Extension, Brazil/Malvinas Confluence. In this study,...
The largest beds of the Patagonian scallop (Zygochlamys patagonica) have been associated with high chlorophyll-a concentration observed along Shelf Break Front but there is no supported hypothesis about how this benthic-pelagic connection maintained. In work we address main physical processes driving linkages through oriented numerical experiments derived from a realistic, high-resolution model, and Lagrangian stochastic simulations. results support an important dynamical control slope...