Oceanographic conditions west of the Baja California coast, 2002-2003: A weak El Niño and subarctic water enhancement
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Redalyc · Ciencias Marinas
Oceanographic conditions in the Pacific waters off Baja California are described for the period 2002–2003. Anomalies in the temperature-salinity relationships were observed from October 2002 to April 2003, with a clear contribution of low salinity and low temperature subarctic water in the upper 100...
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| Publié dans: | Ciencias Marinas |
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Autónoma de Baja California
2005
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| _version_ | 1878325298029658112 |
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| author | Bertha Lavaniegos |
| author_facet | Bertha Lavaniegos |
| collection | Ciencias Marinas |
| container_title | Ciencias Marinas |
| contents | Oceanographic conditions west of the Baja California coast, 2002-2003: A weak El Niño and subarctic water enhancement Bertha Lavaniegos Rubén Castro-Valdez Affonso Da S. Mascarenhas Jr. Reginaldo Durazo Gilberto Gaxiola-Castro José Gómez-Valdés Ciencias de la Tierra bio El Niño Baja California physical coupling California Current System Oceanographic conditions in the Pacific waters off Baja California are described for the period 20022003. Anomalies in thetemperature-salinity relationships were observed from October 2002 to April 2003, with a clear contribution of low salinity andlow temperature subarctic water in the upper 100 m of the water column. Below 100 m, physical data suggested weak El Niñoconditions. Weakened or poleward winds were not observed. The pelagic ecosystem during the intrusion of subarctic watersshowed strong seasonal changes, with localized centers of high chlorophyll and zooplankton in July 2002, followed by a strongdecrease in the following autumn and winter seasons. Both chlorophyll and zooplankton rebounded in April 2003, butzooplankton showed a stronger onshore-offshore gradient. There was no strong biological signal. The zooplankton taxa thatshowed an increase during El Niño 2002-2003 were salps and chaetognaths. The increase of salps did not appear to be related tothis event, due to their seasonal occurrence limited to the northern region. In contrast the increase of chaetognaths presented asimilar pattern to that observed in El Niño 1997-1998. 2005 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48031308 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.3 Vol.31 |
| ctrlnum | oai:cienciasmarinas.com.mx:article/43 10.7773/cm.v31i3.43 |
| description | Oceanographic conditions in the Pacific waters off Baja California are described for the period 2002–2003. Anomalies in the temperature-salinity relationships were observed from October 2002 to April 2003, with a clear contribution of low salinity and low temperature subarctic water in the upper 100 m of the water column. Below 100 m, physical data suggested weak El Niño conditions. Weakened or poleward winds were not observed. The pelagic ecosystem during the intrusion of subarctic waters showed strong seasonal changes, with localized centers of high chlorophyll and zooplankton in July 2002, followed by a strong decrease in the following autumn and winter seasons. Both chlorophyll and zooplankton rebounded in April 2003, but zooplankton showed a stronger onshore-offshore gradient. There was no strong biological signal. The zooplankton taxa that showed an increase during El Niño 2002–2003 were salps and chaetognaths. The increase of salps did not appear to be related to this event, due to their seasonal occurrence limited to the northern region. In contrast the increase of chaetognaths presented a similar pattern to that observed in El Niño 1997–1998.
En este trabajo se describen las condiciones oceanográficas del Océano Pacífico frente a Baja California durante el periodo 2002–2003. De octubre de 2002 a abril de 2003 se observaron relaciones anómalas entre la temperatura y la salinidad debidas a la fuerte presencia de agua de origen subártico, con baja salinidad y baja temperatura, en los 100 m superiores de la columna de agua. Por debajo de los 100 m de profundidad los datos físicos sugirieron condiciones que indican la presencia de un evento El Niño débil. Durante el periodo de estudio no se observó una disminución en los vientos dominantes o vientos con dirección hacia el polo. El ecosistema pelágico mostró fuertes cambios estacionales debidos a la intrusión de agua subártica, con zonas de alta clorofila y zooplancton en julio de 2002, con un fuerte decremento durante el otoño e invierno siguientes. Tanto la clorofila como el zooplancton resurgieron en abril de 2003, con un mayor gradiente costa-océano en el zooplancton. No se presentó una fuerte señal biológica durante el período. Los grupos de zooplancton que mostraron un incremento durante El Niño 2002–2003 fueron las salpas y los quetognatos. El incremento de salpas no parece estar asociado al evento, ya que su incidencia fue estacional y restringida a la región norte. En cambio el incremento en quetognatos presentó un patrón similar al de El Niño 1997–1998. |
| format | Artículo científico |
| id | redalyc_48031308 |
| institution | Redalyc Ciencias Marinas |
| language | en |
| publishDate | 2005 |
| publisher | Universidad Autónoma de Baja California |
| spelling | Oceanographic conditions west of the Baja California coast, 2002–2003: A weak El Niño and subarctic water enhancement Condiciones oceanográficas frente a la costa occidental de Baja California, 2002–2003: Influencia de un El Niño débil y del incremento de agua subártica Durazo, Reginaldo Gaxiola-Castro, Gilberto Lavaniegos, Bertha Castro-Valdez, Rubén Gómez-Valdés, José Da S Mascarenhas Jr, Affonso El Niño California Current System Baja California bio-physical coupling El Niño Sistema de la Corriente de California Baja California acoplamiento-biológico Oceanographic conditions in the Pacific waters off Baja California are described for the period 2002–2003. Anomalies in the temperature-salinity relationships were observed from October 2002 to April 2003, with a clear contribution of low salinity and low temperature subarctic water in the upper 100 m of the water column. Below 100 m, physical data suggested weak El Niño conditions. Weakened or poleward winds were not observed. The pelagic ecosystem during the intrusion of subarctic waters showed strong seasonal changes, with localized centers of high chlorophyll and zooplankton in July 2002, followed by a strong decrease in the following autumn and winter seasons. Both chlorophyll and zooplankton rebounded in April 2003, but zooplankton showed a stronger onshore-offshore gradient. There was no strong biological signal. The zooplankton taxa that showed an increase during El Niño 2002–2003 were salps and chaetognaths. The increase of salps did not appear to be related to this event, due to their seasonal occurrence limited to the northern region. In contrast the increase of chaetognaths presented a similar pattern to that observed in El Niño 1997–1998. En este trabajo se describen las condiciones oceanográficas del Océano Pacífico frente a Baja California durante el periodo 2002–2003. De octubre de 2002 a abril de 2003 se observaron relaciones anómalas entre la temperatura y la salinidad debidas a la fuerte presencia de agua de origen subártico, con baja salinidad y baja temperatura, en los 100 m superiores de la columna de agua. Por debajo de los 100 m de profundidad los datos físicos sugirieron condiciones que indican la presencia de un evento El Niño débil. Durante el periodo de estudio no se observó una disminución en los vientos dominantes o vientos con dirección hacia el polo. El ecosistema pelágico mostró fuertes cambios estacionales debidos a la intrusión de agua subártica, con zonas de alta clorofila y zooplancton en julio de 2002, con un fuerte decremento durante el otoño e invierno siguientes. Tanto la clorofila como el zooplancton resurgieron en abril de 2003, con un mayor gradiente costa-océano en el zooplancton. No se presentó una fuerte señal biológica durante el período. Los grupos de zooplancton que mostraron un incremento durante El Niño 2002–2003 fueron las salpas y los quetognatos. El incremento de salpas no parece estar asociado al evento, ya que su incidencia fue estacional y restringida a la región norte. En cambio el incremento en quetognatos presentó un patrón similar al de El Niño 1997–1998. Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas 2005-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/43 10.7773/cm.v31i3.43 Ciencias Marinas; Vol. 31 No. 3 (2005); 537-552 Ciencias Marinas; Vol. 31 Núm. 3 (2005); 537-552 2395-9053 0185-3880 eng https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/43/25 Copyright (c) 2005 Reginaldo Durazo, Gilberto Gaxiola-Castro; Bertha Lavaniegos; Rubén Castro-Valdez, José Gómez-Valdés, Affonso Da S Mascarenhas Jr https://creativecommons.org/licenses/by/4.0 ['Redalyc'] redalyc_48031308 Oceanographic conditions west of the Baja California coast, 2002-2003: A weak El Niño and subarctic water enhancement ['Oceanographic conditions west of the Baja California coast, 2002-2003: A weak El Niño and subarctic water enhancement', 'Bertha Lavaniegos', 'Ciencias de la Tierra', 'bio', 'El Niño', 'Baja California', 'physical coupling', 'California Current System', 'Oceanographic conditions west of the Baja California coast, 2002-2003: A weak El Niño and subarctic water enhancement Bertha Lavaniegos Rubén Castro-Valdez Affonso Da S. Mascarenhas Jr. Reginaldo Durazo Gilberto Gaxiola-Castro José Gómez-Valdés Ciencias de la Tierra bio El Niño Baja California physical coupling California Current System Oceanographic conditions in the Pacific waters off Baja California are described for the period 2002\x962003. Anomalies in thetemperature-salinity relationships were observed from October 2002 to April 2003, with a clear contribution of low salinity andlow temperature subarctic water in the upper 100 m of the water column. Below 100 m, physical data suggested weak El Niñoconditions. Weakened or poleward winds were not observed. The pelagic ecosystem during the intrusion of subarctic watersshowed strong seasonal changes, with localized centers of high chlorophyll and zooplankton in July 2002, followed by a strongdecrease in the following autumn and winter seasons. Both chlorophyll and zooplankton rebounded in April 2003, butzooplankton showed a stronger onshore-offshore gradient. There was no strong biological signal. The zooplankton taxa thatshowed an increase during El Niño 2002-2003 were salps and chaetognaths. The increase of salps did not appear to be related tothis event, due to their seasonal occurrence limited to the northern region. In contrast the increase of chaetognaths presented asimilar pattern to that observed in El Niño 1997-1998. 2005 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48031308 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.3 Vol.31'] ['Bertha Lavaniegos'] ['Bertha Lavaniegos'] ['Artículo científico'] ['2005'] ['Universidad Autónoma de Baja California'] ['en'] ['Ciencias de la Tierra', 'bio', 'El Niño', 'Baja California', 'physical coupling', 'California Current System'] ['https://www.redalyc.org/articulo.oa?id=48031308'] ['Oceanographic conditions west of the Baja California coast, 2002-2003: A weak El Niño and subarctic water enhancement Bertha Lavaniegos Rubén Castro-Valdez Affonso Da S. Mascarenhas Jr. Reginaldo Durazo Gilberto Gaxiola-Castro José Gómez-Valdés Ciencias de la Tierra bio El Niño Baja California physical coupling California Current System Oceanographic conditions in the Pacific waters off Baja California are described for the period 2002\x962003. Anomalies in thetemperature-salinity relationships were observed from October 2002 to April 2003, with a clear contribution of low salinity andlow temperature subarctic water in the upper 100 m of the water column. Below 100 m, physical data suggested weak El Niñoconditions. Weakened or poleward winds were not observed. The pelagic ecosystem during the intrusion of subarctic watersshowed strong seasonal changes, with localized centers of high chlorophyll and zooplankton in July 2002, followed by a strongdecrease in the following autumn and winter seasons. Both chlorophyll and zooplankton rebounded in April 2003, butzooplankton showed a stronger onshore-offshore gradient. There was no strong biological signal. The zooplankton taxa thatshowed an increase during El Niño 2002-2003 were salps and chaetognaths. The increase of salps did not appear to be related tothis event, due to their seasonal occurrence limited to the northern region. In contrast the increase of chaetognaths presented asimilar pattern to that observed in El Niño 1997-1998. 2005 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48031308 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.3 Vol.31'] |
| spellingShingle | Oceanographic conditions west of the Baja California coast, 2002-2003: A weak El Niño and subarctic water enhancement Bertha Lavaniegos Ciencias de la Tierra bio El Niño Baja California physical coupling California Current System Oceanographic conditions west of the Baja California coast, 2002-2003: A weak El Niño and subarctic water enhancement Bertha Lavaniegos Rubén Castro-Valdez Affonso Da S. Mascarenhas Jr. Reginaldo Durazo Gilberto Gaxiola-Castro José Gómez-Valdés Ciencias de la Tierra bio El Niño Baja California physical coupling California Current System Oceanographic conditions in the Pacific waters off Baja California are described for the period 20022003. Anomalies in thetemperature-salinity relationships were observed from October 2002 to April 2003, with a clear contribution of low salinity andlow temperature subarctic water in the upper 100 m of the water column. Below 100 m, physical data suggested weak El Niñoconditions. Weakened or poleward winds were not observed. The pelagic ecosystem during the intrusion of subarctic watersshowed strong seasonal changes, with localized centers of high chlorophyll and zooplankton in July 2002, followed by a strongdecrease in the following autumn and winter seasons. Both chlorophyll and zooplankton rebounded in April 2003, butzooplankton showed a stronger onshore-offshore gradient. There was no strong biological signal. The zooplankton taxa thatshowed an increase during El Niño 2002-2003 were salps and chaetognaths. The increase of salps did not appear to be related tothis event, due to their seasonal occurrence limited to the northern region. In contrast the increase of chaetognaths presented asimilar pattern to that observed in El Niño 1997-1998. 2005 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48031308 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.3 Vol.31 |
| title | Oceanographic conditions west of the Baja California coast, 2002-2003: A weak El Niño and subarctic water enhancement |
| title_alt | Condiciones oceanográficas frente a la costa occidental de Baja California, 2002–2003: Influencia de un El Niño débil y del incremento de agua subártica Oceanographic conditions west of the Baja California coast, 2002–2003: A weak El Niño and subarctic water enhancement |
| topic | Ciencias de la Tierra bio El Niño Baja California physical coupling California Current System |
| topic_facet | El Niño California Current System Baja California bio-physical coupling Sistema de la Corriente de California acoplamiento-biológico |
| url | https://www.redalyc.org/articulo.oa?id=48031308 https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/43 |