Rubén Castro

Universidad Autónoma de Baja California

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Curtis A. Collins

Liverpool John Moores University

Reginaldo Durazo

Universidad Autónoma de Baja California

Emilio Beier

Center for Scientific Research and Higher Education at Ensenada

A. Mascarenhas

Universidad Autónoma de Baja California

M. F. Lavín

Center for Scientific Research and Higher Education at Ensenada

Victor M. Godínez

Center for Scientific Research and Higher Education at Ensenada

Tetyana Margolina

Naval Postgraduate School

Alejandro Parés‐Sierra

Center for Scientific Research and Higher Education at Ensenada

Xavier Flores-Vidal

Universidad Autónoma de Baja California

Francisco Delgadillo‐Hinojosa

Universidad Autónoma de Baja California

Cooperative Institutions

Universidad Autónoma de Baja California

Center for Scientific Research and Higher Education at Ensenada

University of Arizona

Institut de l'Information Scientifique et Technique

New York University Press

Scripps Institution of Oceanography

National University of Salta

Ensenada Institute of Technology

Consejo Nacional de Investigaciones Científicas y Técnicas

University of California, San Diego

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Seasonal variation of the temperature and salinity at the entrance to the gulf of california, mexico

Ciencias Marinas (2000)

Rubén Castro AS Mascarenhas Reginaldo Durazo Curtis A. Collins

Seasonal variability at the entrance to the Gulf of California is described using high resolution CTD data from a section across the entrance to the gulf that was occupied eight times between 1992 and 1998. Variability decreased rapidly below 100 dbar, so that standard deviations exceeding 0.5ºC and 0.05 for temperature and salinity, respectively, were confined to the upper 150 dbar. The mean salinity field wasasymmetric, with fresher waters (S < 34.6) between 25 and 75 dbar next to Sinaloa and saltier waters (S > 34.8) above 50 dbar and between 100 and 150 dbar near Baja California. A seasonal thermocline developed in the upper 50 dbar, increasing from 21ºC in February surface temperatures to 31ºC in August. Below 100 dbar, temperature at a given pressure was typically colder in the center of the section, indicating cyclonic flow (flow into the gulf next to Sinaloa and out of the gulf next to Baja California). The subsurface mid-gulf cooling (cyclonic flow) was strongest during winter and spring when the exchange of heat between the gulf and the Pacific Ocean is large. Subsurface mid-gulf heating (corresponding to anticyclonic flow) was not observed. Temporal and spatial distribution of saline water masses suggests that heat exchanges take place by alternating the inflow and outflow of warm (surface) and cold (subsurface) water masses. The 1997–1998 El Niño resulted in a 50 dbar deepening of the thermocline in November 1997, as well as a freshening of 0.1 to 0.2 of waters above the thermocline.

Anticyclone

Outflow

Temperature salinity diagrams

10.7773/cm.v26i4.621

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Citations (106)

Temporal and spatial variation of the surface winds in the Gulf of California

Geophysical Research Letters (2003)

Alejandro Parés‐Sierra A. Mascarenhas S.G. Marinone Rubén Castro

Satellite‐derived data (NSCAT and Quickscat) are used to study the annual variability of the sea surface winds over the Gulf of California. Our results indicate that the monsoon character of the winds have been exaggerated. Particularly erroneous is the concept that the wind has two symmetrically, gulf‐following, preferred directions. For some years, this has been the main characteristic used to explain the dynamics of the gulf and it has influenced the development of the ocean circulation models of the region. The surface winds have an average direction that follows that of the gulf, but generally track in a south‐eastward direction. The summer reversal (i.e. wind flowing from the south‐east) occasionally occurs only in the southern regions. The magnitude and standard deviation of the winds are largest in winter. There is an important east‐west gradient in their magnitude and the winds on the peninsular side are generally stronger than those of the continental side.

Variation (astronomy)

10.1029/2002gl016716

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Tiempo de retención y capacidad de transporte de los remolinos del noroeste del golfo de México

Ciencias Marinas (2021)

Fernando José Bello-Fuentes Héctor García–Nava F. Andrade‐Canto Reginaldo Durazo Rubén Castro

Los remolinos son estructuras transitorias que influyen en gran medida en la circulación promedio del océano. Modifican la distribución de masa y propiedades como calor, sal, clorofila y partículas inertes. La capacidad que tienen los remolinos para transportar propiedades o partículas depende de su capacidad de retención. En este estudio se identificaron y caracterizaron los remolinos de mesoescala del noroeste del golfo de México (NOGM) a través de un método lagrangiano que permite evaluar el tiempo de retención y la fracción de masa que pueden retener y transportar. Para el análisis, se utilizaron datos diarios de altimetría de 1993 a 2016. En el periodo de estudio se detectaron un total de 254 remolinos, 73 anticiclones y 181 ciclones. Se identificó una región (94.75º W, 26.75º N) donde ocurren ~30% del total de los remolinos ciclónicos detectados entre las isóbatas de 1,000 y 2,500 m. En promedio, el radio de los remolinos fue de ~40 km para la isobata <1,000 m y ~70 km para la isobata >2,500 m. Los remolinos de mesoescala del NOGM pueden trasportar ~60% de la masa que contenían al momento de ser detectados. En promedio, el transporte de masa ocurrió por 33 d para los ciclones y por 26 d para los anticiclones. Rara vez ocurrió por 60 d o más.

10.7773/cm.v47i2.3116

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Citations (2)

VARIACIÓN ESTACIONAL DE LA TEMPERATURA Y SALINIDAD EN LA ENTRADA DEL GOLFO DE CALIFORNIA, MÉXICO SEASONAL VARIATION OF THE TEMPERATURE AND SALINITY AT THE ENTRANCE TO THE GULF OF CALIFORNIA, MEXICO

Rubén Castro A. Mascarenhas Reginaldo Durazo Curtis A. Collins

Seasonal variability at the entrance to the Gulf of California is described using high resolution CTD data from a section across the entrance to the gulf that was occupied eight times between 1992 and 1998. Variability decreased rapidly below 100 dbar, so that standard deviations exceeding 0.5oC and 0.05 for temperature and salinity, respectively, were confined to the upper 150 dbar. The mean salinity field wasasymmetric, with fresher waters (S 34.8) above 50 dbar and between 100 and 150 dbar near Baja California. A seasonal thermocline developed in the upper 50 dbar, increasing from 21oC in February surface temperatures to 31oC in August. Below 100 dbar, temperature at a given pressure was typically colder in the center of the section, indicating cyclonic flow (flow into the gulf next to Sinaloa and out of the gulf next to Baja California). The subsurface mid-gulf cooling (cyclonic flow) was strongest during winter and spring when the exchange of heat between the gulf and the Pacific Ocean is large. Subsurface mid-gulf heating (corresponding to anticyclonic flow) was not observed. Temporal and spatial distribution of saline water masses suggests that heat exchanges take place by alternating the inflow and outflow of warm (surface) and cold (subsurface) water masses. The 1997–1998 El Nino resulted in a 50 dbar deepening of the thermocline in November 1997, as well as a freshening of 0.1 to 0.2 of waters above the thermocline.

Anticyclone

Temperature salinity diagrams

Outflow

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Bajacalifornian dust deposition and atmospheric input of iron to the Gulf of California during the summer

Marine Chemistry (2020)

A Muñoz-Barbosa Francisco Delgadillo‐Hinojosa Eunise Vanessa Torres-Delgado Armando Félix‐Bermúdez Rubén Castro

Mineral dust

Deposition

Dust storm

Scavenging

10.1016/j.marchem.2020.103850

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Citations (4)

Surface velocity patterns in the Gulf of California from satellite-tracked drifters

AGU Spring Meeting Abstracts (2007)

M. F. Lavín P. P. Niiler André Amador Rubén Castro Emilio Beier

Drifter

Satellite Tracking

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Evolución y extensión de los vientos Santa Ana de febrero de 2002 en el océano, frente a California y la Península de Baja California Evolution and extension of the Santa Ana winds of February 2002 over the ocean, off California and the Baja California Peninsula

Rubén Castro Alejandro Parés‐Sierra

The evolution and extension of Santa Ana winds over the Pacific Ocean, off the coasts of California and the Baja California Peninsula, is documented from QuikScat satellite observations. The typical wind pattern in this region is towards the southeast, but between 9 and 12 February 2002 it was modified by Santa Ana winds, changing in direction towards the south, southwest and west. The changes were notable at first in southern California, but the largest indices of variation occurred between 26oN and 28oN off the Baja California Peninsula, with maxima in the Gulf of California, mainly in the northern part. The maximum extension of the winds to the west of the coast was on 11 February, reaching 32oN and 125oW, or ~700 km; however, towards the southwest the winds extended to 25oN and 124oW, or ~1000 km. The topography of the peninsula plays an important role in controlling the winds passing from the Gulf of California to the Pacific, causing plumes of sand and dust in several locations over the ocean.

Peninsula

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Surface circulation in the Gulf of California in summer from surface drifters and satellite images (2004–2006)

Journal of Geophysical Research Oceans (2014)

M. F. Lavín Rubén Castro Emilio Beier Carlos R. Cabrera Victor M. Godínez

Abstract Surface drifters released in the Gulf of California between June 2004 and August 2006 are used to describe the surface circulation in late spring and summer. In the June to September mean, there was a poleward coastal current on the shelf and slope of the mainland side of the Gulf, with mean speed ∼0.3 m/s; it reached the northern Gulf and joined the cyclonic circulation typical of this zone in summer. In the western half of the southern Gulf, the drifters presented recirculating currents that are due to mesoscale eddies that appear to dominate the surface circulation in summer. In June 2004, the coastal current presented an enhancement event with mean speed around 0.60 m/s and maximum ∼0.80 m/s. It took ∼20 days for a particular drifter to travel the 1000 km from the Gulf entrance to the head. This strengthening of the coastal current was apparent in chlorophyll a and SST satellite images, the drifters following closely the intrusion of warm, chlorophyll‐poor surface water from outside the Gulf. The drifters and the satellite images suggest that the current‐enhancement event lasted less than a month. This mesoscale event was linked with a mesoscale remote forcing in the tropical Pacific coast and with a mesoscale local forcing of the wind. These events seem to occur every year, and are probably important in carrying organisms and properties from the entrance to the whole length of the Gulf.

Drifter

Eddy

Forcing (mathematics)

10.1002/2013jc009345

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Citations (42)

Circulation and Hydrography in the Southern Gulf of California prior to the NAM onset (cruise NAME-1, June 2004)

AGUSM (2007)

M. F. Lavín Rubén Castro Emilio Beier A. Amador Buenrostro

Circulation (fluid dynamics)

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