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首页> 外文期刊>Estuarine Coastal and Shelf Science >A winter upwelling event in the Northern Galician Rias: Frequency and oceanographic implications
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A winter upwelling event in the Northern Galician Rias: Frequency and oceanographic implications

机译：北加利西亚里亚斯的冬季上升事件：频率和海洋学意义

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摘要

A winter shelf-water upwelling evidence (February 2008) is described by first time in the Northern Galician Rias (NW Iberian Peninsula). On February 20, after 9 consecutive days of upwelling favorable conditions, inside the 0 Barqueiro Ria was observed the presence of seawater below 10 m depth which replaced the less saline water previously observed in January. This situation was in agreement with the analyzed Ekman transport close to the northern Galician coast. Salinity and temperature distribution revealed that the upwelled water inside the rias corresponds to shelf bottom seawater which is not associated with Eastern North Atlantic Central Water or the Iberian Poleward Current. In addition, TS diagram indicated a higher influence of upwelling eastward (Viveiro-Barqueiro-Ortigueira). Nutrient salts' concentrations also suggested the presence of seawater from subsurface origin with a small variation with regard to the winter mixing in this marine area. Plankton showed the existence of spring conditions related to solar radiation increase associated to upwelling favorable winds. Some species also corroborated the intrusion of shelf-water inside the ria. Results from the analysis of Ekman transport data from 1967 to 2007 revealed that this event cannot be considered an isolated episode. In fact, the number of days per month under upwelling favorable conditions in winter (January-March) was not negligible (8-10 days) showing that upwelling events along the northern Galician coast are also possible during winter.
机译：北部加利西亚里亚斯（西北伊比利亚半岛）首次描述了冬季架子水上升的证据（2008年2月）。 2月20日，在连续9天的上涌有利条件之后，在0 Barqueiro Ria内观察到了深度低于10 m的海水的存在，该海水代替了之前在1月份观察到的咸水较少的海水。这种情况与分析的加里西亚北部海岸附近的埃克曼运输相一致。盐度和温度分布表明，rias内部的上升流水对应于架子底部海水，与北大西洋东部中央水或伊比利亚极地潮流无关。此外，TS图显示了向上上升的东风（Viveiro-Barqueiro-Ortigueira）的影响更大。营养盐的浓度还表明，由于该海域的冬季混合，存在地下来源的海水，且变化很小。浮游生物表明存在与上升的有利风有关的与太阳辐射增加有关的春季条件。一些物种还证实了里亚区域内架子水的入侵。 1967年至2007年对埃克曼运输数据的分析结果表明，该事件不能被认为是孤立事件。实际上，冬季（1月至3月）每月在上升有利条件下的天数（8-10天）是微不足道的，这表明在冬季，北部加利西亚海岸也可能发生上升事件。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2009年第4期|573-582|共10页
  • 作者

    I. Alvarez; N. Ospina-Alvarez; Y. Pazos; M. deCastro; P. Bernardez; M.J. Campos; J.L. Gomez-Gesteira; M.T. Alvarez-Ossorio; M. Varela; M.Gomez-Gesteira; R. Prego;

  • 作者单位

    Grupo de Fisica de la Atmosfera y del Oceano, Unversidad de Vigo, Facultad de Ciencias, Ourense, Spain CESAM, Departamento de Fisica, Universidade de Aveiro, Aveiro, Portugal;

    Marine Research Institute (CSIC), Vigo, Spain;

    Institute Tecnoloxico para o Control do Medio Marino de Galicia, Peirao de Vilaxoan, Villagarcia de Arosa, Pontevedra, Spain;

    Grupo de Fisica de la Atmosfera y del Oceano, Unversidad de Vigo, Facultad de Ciencias, Ourense, Spain;

    Marine Research Institute (CSIC), Vigo, Spain;

    Centro Oceanografico de La Coruna (IEO), La Coruna, Spain;

    Area de Control y Cestion del Medio Marino y los Recursos Marinos, Fundacion CETMAR, Vigo, Spain;

    Centro Oceanografico de La Coruna (IEO), La Coruna, Spain;

    Centro Oceanografico de La Coruna (IEO), La Coruna, Spain;

    Grupo de Fisica de la Atmosfera y del Oceano, Unversidad de Vigo, Facultad de Ciencias, Ourense, Spain;

    Marine Research Institute (CSIC), Vigo, Spain Marine Research Institute (CSIC), 6, Eduardo Cabello, 36208 Vigo, Spain;

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  • 关键词

    winter upwelling; Galician coast; thermohaline variables; nutrients; chlorophyll; plankton;

    机译：冬季上升加利西亚海岸;盐卤变量;营养素叶绿素浮游生物;

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