Galicia upwelling revisited: out-of-season events in the rias (1967–2009)

Galicia upwelling revisited: out-of-season events in the rias (1967–2009)

Over the last decades several studies have been conducted on upwelling along the Galician coast that have significantly improved the knowledge of this process. These investigations showed that upwelling along this coast is a frequent phenomenon during the spring and summer months, pumping colder Eas...

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Xehetasun bibliografikoak
Egile Nagusiak: Álvarez, I, Prego, R, deCastro, M, Varela, M
Formatua: info:eu-repo/semantics/article
Hizkuntza:eng
Argitaratua: Iniversidad Autónoma de Baja California 2011
Gaiak:
upwelling
autumn
winter
ria
NW Iberian Peninsula
afloramiento
otoño
invierno
ría
Península Ibérica
Sarrera elektronikoa:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1776
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id repositorioinstitucional-20.500.12930-7432
record_format dspace
institution Repositorio Institucional
collection DSpace
language eng
topic upwelling
autumn
winter
ria
NW Iberian Peninsula
afloramiento
otoño
invierno
ría
Península Ibérica
spellingShingle upwelling
autumn
winter
ria
NW Iberian Peninsula
afloramiento
otoño
invierno
ría
Península Ibérica
Álvarez, I
Prego, R
deCastro, M
Varela, M
Galicia upwelling revisited: out-of-season events in the rias (1967–2009)
description Over the last decades several studies have been conducted on upwelling along the Galician coast that have significantly improved the knowledge of this process. These investigations showed that upwelling along this coast is a frequent phenomenon during the spring and summer months, pumping colder Eastern North Atlantic Central Water into the rias. Nevertheless, several upwelling events in autumn and winter have been characterized in the Galician rias, indicating that the upwelling process along the Galician coast is not a phenomenon restricted to spring and summer. In this study the recurrence of these upwelling events has been reviewed from published articles and analyzed from 1967 to 2009 along the western and northern Galician coasts in terms of an upwelling index. The highest mean number of days under favorable upwelling conditions per month was observed during spring and summer on the western (18–26 days) and northern (12–14 days) coasts. During autumn and winter the number of days was lower (11–18 days, western coast; 8–10 days, northern coast) although not negligible, showing the possibility of observing upwelling events during this period. In fact, during these months a significant probability of observing favorable upwelling conditions along both coasts (26%) was found, though the most probable situation corresponded to unfavorable upwelling conditions (44%). The results thus revealed that these events cannot be considered isolated episodes. Upwelling processes in the rias should be observed under favorable conditions, such as prevalence of northerly wind at the adjacent western Galician shelf, independently of the season. 
format info:eu-repo/semantics/article
author Álvarez, I
Prego, R
deCastro, M
Varela, M
author_facet Álvarez, I
Prego, R
deCastro, M
Varela, M
author_sort Álvarez, I
title Galicia upwelling revisited: out-of-season events in the rias (1967–2009)
title_short Galicia upwelling revisited: out-of-season events in the rias (1967–2009)
title_full Galicia upwelling revisited: out-of-season events in the rias (1967–2009)
title_fullStr Galicia upwelling revisited: out-of-season events in the rias (1967–2009)
title_full_unstemmed Galicia upwelling revisited: out-of-season events in the rias (1967–2009)
title_sort galicia upwelling revisited: out-of-season events in the rias (1967–2009)
publisher Iniversidad Autónoma de Baja California
publishDate 2011
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1776
_version_ 1792609212456501248
spelling repositorioinstitucional-20.500.12930-74322023-05-09T14:30:33Z Galicia upwelling revisited: out-of-season events in the rias (1967–2009) Revisión de los eventos de afloramiento en Galicia: eventos fuera de temporada en las rías (1967–2009) Álvarez, I Prego, R deCastro, M Varela, M upwelling autumn winter ria NW Iberian Peninsula afloramiento otoño invierno ría Península Ibérica Over the last decades several studies have been conducted on upwelling along the Galician coast that have significantly improved the knowledge of this process. These investigations showed that upwelling along this coast is a frequent phenomenon during the spring and summer months, pumping colder Eastern North Atlantic Central Water into the rias. Nevertheless, several upwelling events in autumn and winter have been characterized in the Galician rias, indicating that the upwelling process along the Galician coast is not a phenomenon restricted to spring and summer. In this study the recurrence of these upwelling events has been reviewed from published articles and analyzed from 1967 to 2009 along the western and northern Galician coasts in terms of an upwelling index. The highest mean number of days under favorable upwelling conditions per month was observed during spring and summer on the western (18–26 days) and northern (12–14 days) coasts. During autumn and winter the number of days was lower (11–18 days, western coast; 8–10 days, northern coast) although not negligible, showing the possibility of observing upwelling events during this period. In fact, during these months a significant probability of observing favorable upwelling conditions along both coasts (26%) was found, though the most probable situation corresponded to unfavorable upwelling conditions (44%). The results thus revealed that these events cannot be considered isolated episodes. Upwelling processes in the rias should be observed under favorable conditions, such as prevalence of northerly wind at the adjacent western Galician shelf, independently of the season.  Durante las últimas décadas se han llevado a cabo varios estudios relacionados con el fenómeno de afloramiento a lo largo de la costa de Galicia que han mejorado significativamente el conocimiento de este proceso. De los resultados de estos trabajos se ha encontrado que el afloramiento a lo largo de esta costa es un fenómeno frecuente durante los meses de primavera y verano, introduciendo Agua Central del Atlántico Norte en el interior de las rías. Sin embargo, en las rías gallegas se han caracterizado varios eventos de afloramiento durante otoño e invierno que indican que este proceso no es un fenómeno exclusivo de las estaciones de primavera y verano. En este estudio se hace una revisión de estos eventos teniendo en cuenta artículos ya publicados y también se analiza su recurrencia a lo largo de las costas oeste y norte de Galicia a partir de datos de índice de afloramiento de 1967 a 2009. El número medio de días por mes con condiciones favorables de afloramiento más elevado se observó durante los meses de primavera y verano en la costa oeste (18–26 días) y costa norte (12–14 días). Durante otoño e invierno este número de días fue menor (11–18 días, costa oeste; 8–10 días, costa norte) aunque no despreciable, indicando la posibilidad de observar eventos de afloramiento durante este periodo. De hecho, durante estos meses se observó una cierta probabilidad de obtener condiciones favorables de afloramiento a lo largo de ambas costas (26%), aunque la situación más probable correspondió a condiciones desfavorables (44%). Estos resultados revelaron que estos eventos no se pueden considerar como episodios aislados. De esto se deduce que los procesos de afloramiento en las rías deberían ser observados bajo condiciones favorables, tales como vientos predominantes del norte en la plataforma adyacente, independientemente de la estación. 2011-01-05 2021-06-03T03:55:17Z 2021-06-03T03:55:17Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1776 10.7773/cm.v38i1B.1776 https://hdl.handle.net/20.500.12930/7432 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/1776/1662 application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 38 No. 1B (2012); 143-159 Ciencias Marinas; Vol. 38 Núm. 1B (2012); 143-159 2395-9053 0185-3880

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