Julio Sheinbaum

Julio Sheinbaum
Ensenada Center for Scientific Research and Higher Education | CICESE · Department of Physical Oceanography

Professor

About

127
Publications
19,621
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2,436
Citations
Citations since 2016
47 Research Items
1373 Citations
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2016201720182019202020212022050100150200
2016201720182019202020212022050100150200

Publications

Publications (127)
Chapter
Full-text available
Biogeographic provinces of phytoplankton were determined at the surface and 50 m depth during February-March 2013min the region of the gulf of mexico, this region was associated with photosynthetic pigments and spectral absorption shape of phytoplankton aphn/440 nm. in general, oligotrophic characteristics were observed in the gulf of mexico, excep...
Article
Exposure risk is assessed based on modeling suitable habitat of large pelagic fish and oil spill scenarios originating at three wells located in the western GM's deep waters. Since the fate of the oil depends on the oceanographic conditions present during the accident, as well as the magnitude and duration of the spill, which are not known a priori...
Article
Full-text available
The tropical Atlantic has been facing a massive proliferation of Sargassum since 2011, with severe environmental and socioeconomic impacts. The development of large-scale modeling of Sargassum transport and physiology is essential to clarify the link between Sargassum distribution and environmental conditions, and to lay the groundwork for a season...
Article
Analizaremos las causas de las arribazones de sargazo a escala regional y local. Los florecimientos parecen estar relacionados con procesos de fertilización oceánica. La forma en que esto ocurre depende de variaciones estacionales e interanuales de los vientos, olas y corrientes, además de la presencia de remolinos y otros procesos en la zona coste...
Article
Full-text available
Continental shelves are the most productive areas in the seas with the strongest implications for global nitrogen cycling. The Yucatán shelf (YS) is the largest shelf in the Gulf of Mexico (GoM); however, its nitrogen budget has not been quantified. This is largely due to the lack of significant spatio-temporal in situ measurements and the complexi...
Preprint
Full-text available
The seasonal cycle of transport through the Yucatan Channel is estimated from 59 months of direct mooring measurements and 23 years of a transport proxy from AVISO sea level across the channel. Both exhibit a seasonal cycle with a maximum in summer (July–August) but have a minimum in March for the mooring and in November for AVISO data. The annual...
Article
Full-text available
The Gulf of Mexico (GoM) is heavily exploited by the oil industry. Incidental oil releases, such as the 2010 blowout of the Deepwater Horizon platform, lead to a large scale dispersion of pollutants by ocean currents, contaminating the coastline and damaging the ecosystems. In order to determine whether the ocean dynamics hampers or conversely fost...
Article
Full-text available
Continental shelves are the most productive areas in the seas with strongest implications for global Total Nitrogen (TN) cycling. The Yucatan shelf is the largest shelf in the Gulf of Mexico (GoM), however, its general TN budget has not been quantified. This is largely due to the lack of significant spatio-temporal in situ measurements and the comp...
Article
Four years (09/2012 to 08/2016) of simultaneous current observations across the Yucatan Channel (@ ~21.5° N) and the Straits of Florida (@ ~81° W) have permitted to investigate the characteristics of the flow through the Gulf of Mexico. The average transport in both channels is 27.6 Sv (1 Sv = 106 m3/s), in accordance with previous estimates (Schmi...
Article
Full-text available
Freely available at https://journals.ametsoc.org/doi/10.1175/JPO-D-17-0207.1 ------------------------------------------------------------------------------------------------- Persistent Lagrangian transport patterns at the ocean surface are revealed from climatological Lagrangian coherent structures (cLCSs) computed from daily climatological surfac...
Thesis
Full-text available
Single-particle statistics (Lagrangian scales, absolute dispersion and mean absolute diffusivity) from a high resolution regional model in the southwest Gulf of Mexico (SGM) are analyzed. In this regard, the numerical model ROMS and a diagnostic model of Lagrangian advection were used. Particles were deployed every 3 days (2003-2012), south of 20°N...
Article
Using trajectories from acoustically tracked (RAFOS) floats in the Gulf of Mexico, we construct a geography of its Lagrangian circulation within the 1500--2500-m layer. This is done by building a Markov-chain representation of the Lagrangian dynamics. The geography is composed of weakly interacting provinces that constrain the connectivity at depth...
Article
Full-text available
Resumen Se presentan diferentes medidas estadisticas de boyas de deriva superficiales liberadas en el sur del Golfo de México. El estudio se enfoca en la estimación de las escalas Lagrangianas, en el cálculo de dispersión absoluta y en el análisis de las funciones de densidad de probabilidad de los registros de velocidad. Los valores de difusividad...
Article
Full-text available
The seasonal and interannual variability of chlorophyll in the Gulf of Mexico open waters is studied using a three-dimensional coupled physical-biogeochemical model. A 5 years hindcast driven by realistic open-boundary conditions, atmospheric forcings, and freshwater discharges from rivers is performed. The use of recent in situ observations allowe...
Article
The Yucatan shelf in the southern Gulf of Mexico is under the influence of an upwelling that uplifts cool and nutrient rich waters over the continental shelf. The analysis of a set of high resolution (Δx=Δy≈2.8km) simulations of the Gulf of Mexico show two dominant modes of variability of the Yucatan upwelling system: (1) a low frequency mode relat...
Article
Full-text available
Chlorophyll concentration is a key oceanic bio-geochemical variable. In the Gulf of Mexico (GOM), its distribution , which is mainly obtained from satellite surface observations and scarce in situ experiments, is still poorly understood. In 2011-2012, eight profiling floats equipped with biogeochemical sensors were deployed for the first time in th...
Article
The coupling between the upper (z < 1000-m depth) and deep (z > 1500 m) circulation in the western Gulf of Mexico (WGoM) driven by the arrival of Loop Current eddies (LCEs) is analyzed from moorings measuring horizontal velocity in the full water column during a 5-yr period (October 2008-October 2013). Nine LCEs crossing the mooring array are docum...
Poster
Full-text available
In deep waters of Gulf of Mexico (GoM), historical in-situ profile data are relatively scarce. This results in a relative poor knowledge of the distribution and the dynamics of biogeochemical variables and also represents a limitation in developing numerical models. In 2011, the Bureau of Ocean Energy Management (BOEM, USA) deployed in the GoM seve...
Article
Full-text available
Chlorophyll concentration is a key oceanic biogeochemical variable. In the Gulf of Mexico (GOM), its distribution, which is mainly obtained from satellite surface observations and scarce in situ experiments, is still poorly understood. In 2011–2012, eight profiling floats equipped with biogeochemical sensors were deployed for the first time in the...
Presentation
Full-text available
Chlorophyll concentration ([Cla]) is a key oceanic biogeochemical variable and the main proxy for phytoplankton biomass. However, in the Gulf of Mexico, the overall lack of data still prevent an accurate description of the [Cla] distribution and it is impossible to infer on a scale other than climatological. Consequently, mechanisms controlling the...
Presentation
Full-text available
Biogeochemical modeling: revealing chlorophyll patterns in the deep Gulf of Mexico
Poster
Full-text available
Neural Network: an alternative method to estimate nutrient concentrations in the Gulf of Mexico?
Article
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We construct a Markov-chain representation of the surface-ocean Lagrangian dynamics in a region occupied by the Gulf of Mexico (GoM) and adjacent portions of the Caribbean Sea and North Atlantic using satellite-tracked drifter trajectory data, the largest collection so far considered. From the analysis of the eigenvectors of the transition matrix a...
Article
Full-text available
The dispersion of surface drifters released over a 7-year period from five locations in the southern Gulf of Mexico is described. It is shown that the drifter dispersion is strongly affected by the main mesoscale circulations features frequently observed in this area. Some of them are the anticyclonic eddies shed by the Loop Current at the eastern...
Article
Full-text available
Surface dispersion properties in the southwestern Gulf of Mexico are studied by using a set of 441 drifters released during a 7-year period and tracked for 2 months on average. The drifters have a drogue below the surface Ekman layer, so they approximately follow oceanic currents. We follow two different approaches: First, two-particle (or pair) st...
Presentation
Full-text available
The Gulf of Mexico is a very productive environment and previous studies, mainly based on satellite observations, evidenced a strong seasonality in surface chlorophyll concentrations due to specific hydrologic and meteorological conditions (winter mixing associated to maximum concentrations and summer stratification characterized by annual minimum...
Article
The near-inertial trapping of the wave wakes of two consecutive hurricanes, Gustav and Ike (2008), at the base of the Loop Current is described using observations of a triangular mooring array. Hurricane Gustav translates over the Loop Current twice as fast and leads to a sharper, but equally strong, wind intensity peak than Hurricane Ike. Followin...
Article
Full-text available
Velocity data from a mooring array deployed northeast of the Campeche Bank (CB) show the presence of subinertial, high-frequency (below 15 days) velocity fluctuations within the core of the northward flowing Loop Current. These fluctuations are associated with the presence of surface-intensified Loop Current frontal eddies (LCFEs), with cyclonic vo...
Article
Time-series of Yucatan Current transport, vorticity fluctuations and Loop Current northward extension during the 3 deployment periods only depict positive correlation in two of them. Given the wide spectrum of variability, much more data are required to determine if a statistically robust relation exists among these variables. Our results clearly i...
Article
Full-text available
The dynamics of the Loop Current (LC) and the release of its anticyclonic eddy (Loop Current eddy, LCE) are some of the most important features of the circulation in the Gulf of Mexico (GoM) and key aspects to gauge the validity of numerical simulations. Using a numerical model, we investigate the sensitivity of the LC and LCE detachments to three...
Article
Full-text available
Submarine groundwater discharge provides freshwater and nutrients to coastal environments. In some places throughout the world, this direct connection between aquifers and oceans may also allow saltwater intrusion. Saltwater intrusion was studied at a submarine spring within a fringing reef lagoon on the eastern Yucatán Peninsula by observing its i...
Article
A high-resolution, regional atmospheric model with different sea surface temperature (SST) boundary conditions (BC) is used to examine the air-sea interactions of the winter cold fronts (CF) advancing over the Gulf of Mexico (GoM). Comparison with oceanic-buoy 10-m wind, 2 m air temperature (AIR.2 m), sea level pressure (SLP) and SST reveals good a...
Article
The near-inertial wave wake of Hurricane Ida is examined of the basis of horizontal velocity observations acquired from 7 moorings instrumented with acoustic Doppler current profilers deployed across the shelf break, slope, and at the abyssal plain of the Yucatan Peninsula, from 130 m to ∼3300 m. During the forced stage, background mean-flow consis...
Article
An overview of a new comprehensive observational study of the Loop Current (LC) in the eastern Gulf of Mexico that encompassed full-depth and near-bottom moorings, pressure-equipped inverted echo sounders (PIES) and remote sensing is presented. The study array was designed to encompass the LC from the Campeche Bank to the west Florida escarpment. T...
Article
The wind-driven circulation and wind-induced coastal upwelling in a large shelf sea with a zonally oriented coast are examined. The Yucatan shelf is located to the north of the Yucatan peninsula in the eastern Gulf of Mexico. This area is a tropical shallow body of water with a smooth sloping bottom and is one of the largest shelves in the world. T...
Article
Mooring measurements in the Yucatan Channel, from May 2010 to May 2011, and from July 2012 to June 2013 yield a mean transport of 27 and 25 Sv, respectively, with a subinertial standard deviation of 3.5 Sv. These mean transport values are higher than the 23 Sv reported from 21 months of similar measurements (1999-2001). Analysis of low frequency va...
Technical Report
Three years of direct near-surface to bottom current measurements at the western Yucatan Channel (defined west of 85.6ºW) between 2008 and 2011 capture the main characteristics of the Yucatan Current. Average current structure shows a high degree of consistency over time, with mean near-surface velocities of about 1 m/s, decreasing significantly wi...
Article
Full-text available
We measured diel migration with 11 acoustic Doppler current meter profilers and consistently found diel and lunar cycles of vertical migration from 250 m down to the bathypelagic (>1000 m). These measurements come from year-long deployments in eight locations within the Gulf of Mexico. Diel vertical migration could be characterized, in depth and ti...
Article
Full-text available
The horizontal momentum balance in the upper layers of the Yucatan Channel is examined for a period of 22 months, from September 1999 to June 2001, using subsurface currents from ADCP measurements at eight moorings across the channel, pressure measurements from coastal pressure sensors on both sides of the channel, QuickSCAT winds and AVISO altimet...
Article
The upper-ocean heat budget of the Caribbean upwelling system is investigated during the onset of the Atlantic warm pool (June-September) using high-resolution observations of sea surface temperature and a high-resolution (1/128) regional model. Vertical mixing is found to be the major cooling contribution to the mixed layer heat budget in the near...
Article
Full-text available
The upper layer circulation in the Bay of Campeche is analyzed with three years of data recorded by surface drifters, current meter moorings, and satellite altimetry. The measurements show that the mean cyclonic circulation observed by previous authors extends below 1000 m, and that its size and location are delimited by the particular topography o...
Article
Full-text available
Determining when and how a Loop Current eddy (LCE) in the Gulf of Mexico will finally separate is a difficult task, since several detachment re-attachment processes can occur during one of these events. Separation is usually defined based on snapshots of Eulerian fields such as sea surface height (SSH) but here we suggest that a Lagrangian view of...
Chapter
Full-text available
Phytogeography provinces of nano-microphytoplankton (>5 micras) were determined at the surface and 50 m depth during summer 2011 in the southern region of the Gulf of México, associated with photosynthetic pigments by HPLC and spectral absorption shape of phytoplankton (aphn/40 nm). In general, oligotrophic characteristics were observed and the dom...
Article
Full-text available
Variability of the mesoscale eddy field in the Caribbean Sea is analyzed over the period 1993-2009 using geostrophic anomalies derived from altimeter data and a high-resolution (1/ 12®) regional model. The Colombia Basin presents the largest values of eddy kinetic energy (EKE) and its semiannual cycle, with a main peak in August-October and a secon...
Article
Intense currents having speeds between 10 and 40 cm.s-1 from 1000 m below the surface to the bottom have been measured in the Loop Current (LC) region and in the Western Gulf of Mexico (WGM). The observations come from moored current meters sampling from the near-surface to the bottom at 3300-3500 m and from August 2008 to August 2010. Ten intermit...
Article
Full-text available
The Deepwater Horizon oil spill threatened many coastal ecosystems in the Gulf of Mexico during the spring and summer of 2010. Mitigation strategies included the construction of barrier sand berms, the restriction or blocking of inlets, and the diversion of freshwater from rivers to the coastal marshes and into the ocean, in order to flush away the...
Article
Full-text available
The western boundary current in the North Atlantic is characterized by an intense flow (reaching 2.5 ms-1, at the surface) that enters the Caribbean Sea through the Lesser Antilles passages, crosses the entire Caribbean and enters the Gulf of Mexico through the Yucatan Channel, where it is known as the Loop Current. A characteristic feature of the...
Chapter
Full-text available
The overall goal of the SGMPAN is to develop and apply guidelines for the design of networks of Marine Protected Areas (MPAs) in a changing climate along the Atlantic coast of North America, including estuaries, shelves and deeper waters. This area, extending from the Caribbean Sea to the northern Labrador Shelf, includes the Marine Ecoregions cata...
Article
Full-text available
The Deepwater Horizon oil spill threatened many coastal ecosystems in the Gulf of Mexico during the spring and summer of 2010. Mitigation strategies included the construction of barrier sand berms, the restriction or blocking of inlets, and the diversion of freshwater from rivers to the coastal marshes and into the ocean, in order to flush away the...
Article
The relative drought observed over the intra-americas sea (IAS) region in the middle of the summer rainy season (observed from May to October) is called ''midsummer drought'' (MSD). Although the magnitude of this MSD event varies from year to year, it clearly forces the climatological rainfall structure to be bimodal at summertime, with maxima in t...
Article
Until recently, the Bay of Campeche was the most undersampled area of the Gulf of Mexico. Three years of mooring and drifter observations of the upper-layer velocity field have greatly improved our understanding of the dynamics in this region. They show that the mean cyclonic circulation, previously reported in the literature, is a persistent featu...