Jesus Dubert

Jesus Dubert
University of Aveiro | UA · Physics department & Centre for Environmental and Marine Studies (CESAM)

PhD

About

77
Publications
8,953
Reads
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2,387
Citations
Introduction
I'm a physical oceanographer with interest on numerical modeling and observations of the ocean, from an interdisciplinar point of view, including the biogeochemical processes, carbon and oxygen cycles in the ocean, larval dispersal and connectivity, and other subjects related to the ocean.
Additional affiliations
July 2005 - June 2015
University of Aveiro
Position
  • Assistant Professor, Vice-Director of CESAM Associated Laboratory

Publications

Publications (77)
Article
Timescales in the ocean can range from the transient turbulence to the long-term climate scales. Quantifying its changes involves establishing meaningful background states, but that can be challenging if an extensive array of wave phenomena is masking the ocean's variability. Internal Waves (IWs) are a fundamental part of these wave phenomena, whic...
Article
Full-text available
Understanding large-scale spatial and temporal patterns of marine populations is a central goal in ecology, which has received renewed attention under climate change. However, few studies explore the large-scale dynamics of populations using standardized protocols and during the same time frames. We studied the phenology and intensity of reproducti...
Article
Full-text available
In January 2020, a stakeholder workshop was organized as a knowledge sharing strategy among European stalked barnacle fisheries. Management of this fishery differs greatly among regions and ranges from less organized and governed at large scales (>100 km, coasts of SW Portugal and Brittany in France) to highly participatory systems which are co-man...
Article
Numerical biophysical models are a standard methodology used to provide estimates of larval dispersal and population connectivity for marine species with a bi-phasic life cycle. However, confidence on biophysical models, tested by confronting model estimates with empirical evidence, is seldomly assessed. We compared time-series estimates of larval...
Article
Full-text available
Estuarine exchange flow plays an important role in the biogeochemical properties exchange between the coastal ocean and the estuaries. Circulation patterns inside the Rias Baixas (NW Iberian Peninsula) have been widely studied, while the Ría de Pontevedra has received less attention. A high-resolution ROMS-AGRIF system configuration with three onli...
Article
The hydrography and circulation of the Northwestern Iberian Margin (NWIM) was studied over an annual cycle from November 2008 to December 2009. The study was focused on the Cape Silleiro border region that separates the rugged northern coastline of the Rías Baixas embayments and the smoother southern coastline, a source of major fresh water outflow...
Article
Full-text available
Marine landings in Portugal have decreased at a higher rate than fishing effort in the last 20 years. Identifying the variables driving the quantity and composition of landings is pivotal to understand the dynamics of the fisheries sector, which entails complex social and environmental aspects. In this study, we investigate the main drivers of mari...
Article
This work presents the results of two oceanographic surveys conducted off NW Iberia during successive summer upwelling seasons, aiming at the identification of the physical processes underlying the phytoplankton distribution in the area. Mooring (ADCP and thermistors) and ship-based CTD-F observations corroborate previous results that wind-driven u...
Poster
Full-text available
The PERCEBES project aspires to answer questions regarding the effects of harvesting on the intertidal community and recovery potential of stalked barnacle populations after harvesting, for which a Human Exclusion Experiment has been deployed over 2 years in 4 regions: coast of Alentejo (Portugal), Atlantic Islands (Galicia, Spain), Western Asturia...
Poster
Full-text available
MarRISK Project Goal: Consolidation of a knowledge infrastructure for evaluating coastal risks in the Galicia-North Portugal Euroregion. A multi-disciplinary consortium of experts in Marine Sciences from the Galicia and North-Portugal Euroregion has put together more than 300 variables at the disposal of MarRISK project for a better understanding o...
Article
Full-text available
The hydrography and dynamics of NW Iberian margin were explored for July 2009, based on a set of in situ and remote sensing observations. Zonal sections of standard CTD casts, towed CTD (SeaSoar), Acoustic Doppler Current Profilers (ADCP) and Lagrangian surveys were made to characterize cycles of upwelling and relaxation in this region. Two periods...
Data
Complementary data used to reach the conclusions drawn in the manuscript. Includes the relevant observations from the CAIBEX project and the wind data from the WRF simulation. (ZIP)
Article
Velella velella is a pleustonic colonial organism found in temperate and tropical oceanic waters worldwide. During certain periods of the year, large numbers of the species can wash up on coastal beaches. However, little information exists on the ecology and dispersal patterns of this cosmopolitan species, especially on their distribution at sea. H...
Article
Full-text available
Marine larval dispersal is a complex biophysical process that depends on the effects of species biology and oceanography, leading to logistical difficulties in estimating connectivity among populations of marine animals with biphasic life cycles. To address this challenge, the application of multiple methodological approaches has been advocated, in...
Article
For decapod crustaceans, the larval phase is the main responsible for dispersal, given the direct emission from adult habitats into the water column. Circulation patterns and behavioural mechanisms control the dispersal distance and connectivity between different areas. Information on larval distribution and abundance is required to predict the siz...
Conference Paper
Full-text available
Studying the trends, evolution, and factors driving marine fish populations and fisheries is fundamental to understand the role of marine fish as a provisioning Ecosystem Service. During the last 26 years, marine fish landings in mainland Portugal suffered a 52% drop, mainly due to the decrease of sardine landings. In order to throw some light on t...
Article
Full-text available
The present work aims at evaluating the impacts of a climate change scenario on the hydrography and dynamics of the Iberian Upwelling System. Using regional ocean model configurations, the study domain is forced with three different sets of surface fields: a climatological dataset to provide the control run; a dataset obtained from averaging severa...
Article
Full-text available
Knowledge of connectivity pathways in the marine environment is crucial for understanding the spatial structure of populations and for developing appropriate monitoring and management strategies. Here, we used the mussel Mytilus galloprovincialis as a model species to investigate connectivity patterns within the Berlengas and Arrábida Marine Protec...
Article
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We study the eddies that form by destabilization of the Iberian Poleward Current. Some anticyclones have been identified in satellite Sea Surface Temperature, as they are persistent and remarkably warm, and they contain IPC waters in their core. The number of observed eddies is small, and little is known about their statistics, places of formation,...
Article
Coastal upwelling filaments off the Western Iberian Margin, detected in AVHRR satellite imagery and in a realistic ROMS simulation of sea surface temperature, were studied in the upwelling seasons (May–October) of 2001–2010. Sea surface temperature data were retrieved from AVHRR satellite imagery and from a realistic ROMS numerical simulation. The...
Article
A modeling study of the seasonal and interannual variability of chlorophyll-a has been carried out for the period 2001–2010 along the Iberian shelf and adjacent ocean. A high resolution regional configuration of the three-dimensional Regional Ocean Modeling System (ROMS) has been used, coupled to a N2PZD2-type biogeochemical model. Chlorophyll-a co...
Article
This work evaluates the performance of several global climate models (GCMs) as forcing of a regional ocean model configuration centered in the Iberian Basin. The study is divided in two parts. First, the output of nine GCMs is analyzed based on the fields needed to force the ocean model (Regional Ocean Modelling System—ROMS). GCMs differ greatly be...
Article
The mean seasonal hydrography and circulation of the Western Iberian Margin (WIM) are studied by means of a high-resolution configuration of the Regional Oceanic Modeling System. A comparison of 5-year model averages for January and July with climatological datasets shows a general good agreement in the reproduction of the mean water mass propertie...
Article
Predicting the spatial and temporal patterns of marine larval dispersal and supply is a challenging task, requiring the use of novel approaches capable of capturing the inherent variability in the mechanisms involved. Biophysical models are emerging as important tools used to understand dispersal and recruitment of marine larvae on several scales,...
Conference Paper
Full-text available
An extreme event in September 2007, presenting a strong upwelling core detaching from the Galician NW coast and extending towards west-northwest from the Cape Finisterre - Cape Ortegal zone, with the formation of several filaments and a consequent strong response in chlorophyll concentration values is analyzed. To do so, a NPZD biogeochemical modul...
Article
In 1990, satellite observations revealed that an anticyclonic surface eddy (a SWODDY, for Slope Water Oceanic eDDY) followed a cycloidal trajectory north of the Iberian coast in the Bay of Biscay. To understand the mechanisms underlying such a trajectory, we study the evolution of an idealized surface eddy in a two-layer flat-bottom quasi-geostroph...
Article
Full-text available
As in most eastern boundary systems, on the Western Iberian Margin there is coastal upwelling during summer due to the alongshore northerly winds and the consequent offshore displacement of surface waters. This work addresses the origin of these upwelled waters. Using a regional ocean model, a climatological configuration and a lagrangian particle...
Article
Full-text available
The Western Iberian Margin is the northern limit of the Canary Upwelling System, a region of strong mesoscale activity, seasonal variability and thus very likely to be sensitive to climate change. Using a regional ocean model and data from several coupled global climate models (CGCM), climatological simulations were set up for present and for a fut...
Article
Full-text available
There is a growing interest on physical and biogeochemical oceanic hindcasts and forecasts from a wide range of users and businesses. In this contribution we present an operational biogeochemical forecast system for the Portuguese and Galician oceanographic regions, where atmospheric, hydrodynamic and biogeochemical variables are integrated. The oc...
Article
Full-text available
Predicting the spatial and temporal patterns of marine larval dispersal and supply is a challenging task due to the small size of the larvae and the variability of oceanographic processes. Addressing this problem requires the use of novel approaches capable of capturing the inherent variability in the mechanisms involved. In this study we test whet...
Data
Time evolution of larval trajectories for the complete larval series (first zoea to megalopa) for the Invasion experiment with normal growth rate without mortality in 2006. Left panel: trajectories of the larvae that never recruited to the Ria de Aveiro, right panel: trajectories of the larvae that recruited to the Ria de Aveiro. Arrows close to es...
Data
Time evolution of larval trajectories for the complete larval series (first zoea to megalopa) for the Invasion experiment with normal growth rate without mortality in 2007. Left panel: trajectories of the larvae that never recruited to the Ria de Aveiro, right panel: trajectories of the larvae that recruited to the Ria de Aveiro. Arrows close to es...
Article
There is a growing interest on physical and biogeochemical oceanic hindcasts and forecasts from a wide range of users and businesses. In this contribution we present an operational biogeochemical forecast system for the Portuguese and Galician oceanographic regions, where atmospheric, hydrodynamic and biogeochemical variables are integrated. The oc...
Article
Trying to find a set of parameters to properly reproduce the biogeochemical dynamics of the region of study is a major concern in biogeochemical ocean modelling. Model parameters are constant values introduced in the equations that calculate the time and space evolution of the state variables of the biogeochemical model. A good set of parameters al...
Article
Full-text available
A nested configuration of the Regional Ocean Modeling System (ROMS) is used to study the seasonal circulation patterns and mesoscale activity of the Eastern Brazilian Margin (EBM). The EBM encompass an oligotrophic and bathymetrically complex zone in the NW South Atlantic from 8 degrees S to 20 degrees S. Sea-level anomaly data are used to validate...
Article
Electromagnetic fluctuations in the ocean have external sources like ionospheric-magnetospheric current systems, and purely internal oceanic sources associated with interaction between water velocity fields and the geomagnetic field. The oscillations of the telluric field originated by tides were first predicted by Faraday in 1832. The physical phe...
Article
Full-text available
We measured variability in daily supply levels of shore crab megalopae in an estuary on the northwest Portuguese coast, Ria de Aveiro, located in the eastern Atlantic upwelling system. The 5 yr study covered the shore crab larval season (generally February to July) in 2002 and from 2006 to 2009. We addressed the possible effects of wind-and tide-dr...
Article
Realistic simulations of the circulation off the Western Iberian Peninsula, for the period 2001-2009 are compared against satellite observations of sea surface temperature (SST), for the summer upwelling season. This was done by means of comparisons of climatological means of monthly sst, standard deviation, and monthly anomalies obtained from sate...
Article
The study of the connectivity between populations is one of the 'hot' applications of numerical models of the ocean circulation. An IBM (Individual Based model) was developed, using Carcinus manenas larvae crab as a model. A set of particles was used as a representation of larvae, in order to study their larval life cycle, including the larval grow...
Article
Onshore measurements of telluric field oscillations have been used to estimate the water transport associated to tidal flow in the western Portuguese coast. The onshore E-W dipoles located at São Jacinto and Sines were calibrated by comparing the ocean modelled N-S shelf water transport originated by the main lunar tidal frequency and the correspon...
Article
This work aims at a better understanding of the variability of the Iberian Upwelling Ecosystem, not only in the present regime, but also in a future climate change scenario. The purpose of the present study is to assess whether downscaling is an appropriate methodology for the region and its physical processes. Numerical simulations with the Region...
Article
Reprocessing of a 326-km long multichannel seismic line acquired in the Tagus Abyssal Plain off W Iberia in 1991 allowed detailed imaging of the thermohaline structure of several mesoscale features within the water column. The interpretation was supported by subsurface float measurements, Sea Level Anomaly (SLA) maps and Sea Surface Temperature (SS...
Article
In order to better understand the variability of the Iberian Upwelling Ecosystem, numerical simulations with the Regional Ocean Modelling System (ROMS) were setup. These configurations allow to study the long term and large scale ocean circulation features, and also the mesoscale features associated to the coastal transition zone. It is also intend...
Article
A study of the upper slope circulation in the Gulf of Cadiz is presented. Observations, both original and revisited, and realistic numerical modeling are used together to describe the structure and variability of the slope current system above the Mediterranean outflow. It is shown that the Mediterranean inflow-outflow coupling plays a stronger rol...
Article
Satellite-derived sea surface temperature (SST) and chlorophyll ([Chl]) concentration maps are used together with numerical models to study the advection patterns observed during a summer upwelling event off central Portugal, a region characterized by a complex coastline and bathymetry. It is shown that the model solutions realistically reproduce t...
Article
We present a case study of the generation of a cold filament rooted off the southwestern edge of the Strait of Gibraltar (Atlantic side) during the summer of 2000. The event is successfully simulated using high-resolution atmospheric and oceanic numerical models. It is shown that a sharp filament may develop oceanwards with little modification of t...
Article
Full-text available
A set of simulations using a validated and realistic parameterization of a numerical model was conducted for the south and southwest Portuguese regions as an attempt to understand larval dispersal patterns in the Norway lobster (Nephrops norvegicus). Larvae were introduced in the model as Lagrangian particles with five different behavioural scenari...
Article
A set of simulations using a validated and realistic parameterization of a numerical model was conducted for the south and southwest Portuguese regions as an attempt to understand larval dispersal patterns in the Norway lobster (Nephrops norvegicus). Larvae were introduced in the model as Lagrangian particles with five different behavioural scenari...
Article
Full-text available
1] The mean flow structure of the Gulf of Cadiz is studied using a numerical model. The model consists of a set of one-way nested configurations attaining resolutions on the order of 2.6 km in the region of the Gulf of Cadiz. In the large-scale configuration, the entrainment of the Mediterranean Water is parameterized implicitly through a nudging t...
Article
A high resolution nested model of the Western Iberia shelf is developed and compared with field observations. We use an embedded particle tracking submodel that includes advection, diffusion, and diel vertical migration to simulate crab larvae dispersal. A set of experiments with varying oceanographic conditions and Lagrangian model parameters is a...
Article
The present review is focused on the mesoscale physical processes recognized in the Western Iberia Ecosystem, complementing earlier reviews dedicated to larger scales. Recent studies support the idea that the mesoscale processes, superimposed on the larger scale variability, are the major factor controlling the ecosystem functioning in the region....
Article
Full-text available
We investigate the onset of the warm counterflow recurrent in summer periods along the shelf of the Gulf of Cadiz and southwest of Iberia. Fully realistic and idealized numerical configurations are used with the aim of partitioning the different processes at play in the complex circulation of the Gulf of Cadiz. The realistic model simulates in grea...
Article
The present review addresses recent findings made in the western Iberia ecosystem on the behavioural and physical interactions that regulate dispersal, supply to coastal habitats and settlement of invertebrate larvae. These studies used the barnacle Chthamalus spp. and the crab Carcinus maenas as model organisms. The observations made on the Iberia...
Article
Textural, mineralogical, geochemical and microfaunal data (benthic foraminifera) were studied along the OMEX core KSGX 40 recovered in the Galicia Mud Deposit, of the NW Iberian outer continental shelf, off the Ría de Vigo (North of Spain). This core included the records of the last ca. 4.8 ka cal BP and consists, from the base to the top, of a sed...
Article
Full-text available
The water exchange between the ocean costal waters and the Ria de Aveiro coastal lagoon has an important role in the environmental aspects inside the lagoon. A well-tested 3D coastal circulation model is applied to establish different scenarios of this interaction. The numerical experiments, employing lagrangian techniques, were devised to study th...
Article
A s-coordinate three-dimensional model, regional ocean modeling system (ROMS), was implemented in the Western Iberian region ranging from the coast to 11 degrees W aiming high-resolution tidal simulations for an homogeneous ocean. The features for tidal heights and ellipses for the principal constituents, M-2, S-2, N-2, K-2, K-1, O-1, P-1 and Q(1),...