Underway pH measurements in upwelling conditions: The California Current

This paper reports the use of underway spectrophotometric pH as part of a series of measurements (together with underway salinity, temperature and some discrete measurements of chlorophyll a) made in the California Current coastal upwelling area. The values of pH obtained (measured at 25ºC) ranged f...

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Detalles Bibliográficos
Autor: Del-Valls, TA
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1999
País:México
Institución:UNIVERSIDAD AUTÓNOMA DE BAJA CALIFORNIA
Repositorio:Ciencias Marinas
Idioma:inglés
OAI Identifier:oai:cienciasmarinas.com.mx:article/719
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/719
Access Level:acceso abierto
Palabra clave:spectrophotometric pH
CO2
biogeochemical processes
upwelling
California Current
pH espectrofotométrico
procesos biogeoquímicos
afloramiento
Corriente de California
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spelling Underway pH measurements in upwelling conditions: The California CurrentMedidas en continuo de pH en condiciones de afloramiento: La Corriente de CaliforniaDel-Valls, TAspectrophotometric pHCO2biogeochemical processesupwellingCalifornia CurrentpH espectrofotométricoCO2procesos biogeoquímicosafloramientoCorriente de CaliforniaThis paper reports the use of underway spectrophotometric pH as part of a series of measurements (together with underway salinity, temperature and some discrete measurements of chlorophyll a) made in the California Current coastal upwelling area. The values of pH obtained (measured at 25ºC) ranged from 7.6 near the coastline (in the centre of the upwelling) to 8.3 at the western boundary of the study area (close to the oceanic environment); pH values were more uniform away from the influence of upwelling. Variations in the pH, temperature and chlorophyll a were all approximately in phase. In particular, higher pH values –indicative of photosynthetic activity– were well correlated with the chlorophyll a measurements. These results illustrate the need to consider both small and mesoscale processes when investigating carbon dioxide exchange across the air-sea interface in such systems, and also show that spectrophotometric pH measurements are sufficiently sensitive (and can be measured sufficiently rapidly) to describe various biogeochemical processes in such systems.Este trabajo muestra el uso de medidas espectrofotométricas de pH realizadas de forma continua y automatizadas como parte de una serie de medidas (conjuntamente en continuo, la salinidad, temperatura y algunos datos discretos de clorofila a) en el área de afloramiento de la Corriente de California. Los valores obtenidos de pH (medidos a 25ºC) oscilaron entre 7.6 cerca de la línea de costa (en el centro del afloramiento) y 8.3 en la frontera más oeste del área estudiada (cerca del ambiente oceánico); los valores de pH fueron más uniformes lejos de la zona de influencia del afloramiento. Las variaciones en pH, temperatura y clorofila a estuvieron aproximadamente en fase conjuntamente. En particular, los valores mayores de pH –indicativos de actividad fotosintética– mostraron buena correlación con las medidas de clorofila a. Estos resultados muestran la necesidad de considerar tanto los procesos a nivel de escala pequeña como a mesoescala cuando se estudia el intercambio de dióxido de carbono a través de la interfase aire-océano en sistemas como los estudiados, y también muestran a las medidas espectrofotométricas de pH como suficientemente sensibles (pudiéndose medir suficientemente rápido) para describir diferentes procesos biogeoquímicos en estos sistemas.Iniversidad Autónoma de Baja California1999-03-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPeer-reviewed Article Artículo Arbitradoapplication/pdfhttps://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/71910.7773/cm.v25i3.719Ciencias Marinas; Vol. 25 No. 3 (1999); 345-365Ciencias Marinas; Vol. 25 Núm. 3 (1999); 345-3652395-90530185-3880reponame:Ciencias Marinasinstname:UNIVERSIDAD AUTÓNOMA DE BAJA CALIFORNIAinstacron:UABCenghttps://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/719/646info:eu-repo/semantics/openAccessoai:cienciasmarinas.com.mx:article/7192024-08-22T17:01:34Z
dc.title.none.fl_str_mv Underway pH measurements in upwelling conditions: The California Current
Medidas en continuo de pH en condiciones de afloramiento: La Corriente de California
title Underway pH measurements in upwelling conditions: The California Current
spellingShingle Underway pH measurements in upwelling conditions: The California Current
Del-Valls, TA
spectrophotometric pH
CO2
biogeochemical processes
upwelling
California Current
pH espectrofotométrico
CO2
procesos biogeoquímicos
afloramiento
Corriente de California
title_short Underway pH measurements in upwelling conditions: The California Current
title_full Underway pH measurements in upwelling conditions: The California Current
title_fullStr Underway pH measurements in upwelling conditions: The California Current
title_full_unstemmed Underway pH measurements in upwelling conditions: The California Current
title_sort Underway pH measurements in upwelling conditions: The California Current
dc.creator.none.fl_str_mv Del-Valls, TA
author Del-Valls, TA
author_facet Del-Valls, TA
author_role author
dc.subject.none.fl_str_mv spectrophotometric pH
CO2
biogeochemical processes
upwelling
California Current
pH espectrofotométrico
CO2
procesos biogeoquímicos
afloramiento
Corriente de California
topic spectrophotometric pH
CO2
biogeochemical processes
upwelling
California Current
pH espectrofotométrico
CO2
procesos biogeoquímicos
afloramiento
Corriente de California
description This paper reports the use of underway spectrophotometric pH as part of a series of measurements (together with underway salinity, temperature and some discrete measurements of chlorophyll a) made in the California Current coastal upwelling area. The values of pH obtained (measured at 25ºC) ranged from 7.6 near the coastline (in the centre of the upwelling) to 8.3 at the western boundary of the study area (close to the oceanic environment); pH values were more uniform away from the influence of upwelling. Variations in the pH, temperature and chlorophyll a were all approximately in phase. In particular, higher pH values –indicative of photosynthetic activity– were well correlated with the chlorophyll a measurements. These results illustrate the need to consider both small and mesoscale processes when investigating carbon dioxide exchange across the air-sea interface in such systems, and also show that spectrophotometric pH measurements are sufficiently sensitive (and can be measured sufficiently rapidly) to describe various biogeochemical processes in such systems.
publishDate 1999
dc.date.none.fl_str_mv 1999-03-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
Artículo Arbitrado
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/719
10.7773/cm.v25i3.719
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/719
identifier_str_mv 10.7773/cm.v25i3.719
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/719/646
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Iniversidad Autónoma de Baja California
publisher.none.fl_str_mv Iniversidad Autónoma de Baja California
dc.source.none.fl_str_mv Ciencias Marinas; Vol. 25 No. 3 (1999); 345-365
Ciencias Marinas; Vol. 25 Núm. 3 (1999); 345-365
2395-9053
0185-3880
reponame:Ciencias Marinas
instname:UNIVERSIDAD AUTÓNOMA DE BAJA CALIFORNIA
instacron:UABC
instname_str UNIVERSIDAD AUTÓNOMA DE BAJA CALIFORNIA
instacron_str UABC
institution UABC
reponame_str Ciencias Marinas
collection Ciencias Marinas
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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