Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean
The variability of total alkalinity (TA) and its relationship with salinity in the tropical and subtropical surface ocean were examined using data collected in various marine environments from a ship of opportunity. In the open ocean regions of the Atlantic, Pacific, and Indian Oceans, sea surface T...
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ftnerc:oai:nora.nerc.ac.uk:507861 2023-05-15T17:34:51+02:00 Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean Jiang, Zong-Pei Tyrrell, Toby Hydes, David J. Dai, Minhan Hartman, Susan E. 2014-07-17 text http://nora.nerc.ac.uk/id/eprint/507861/ https://nora.nerc.ac.uk/id/eprint/507861/1/gbc20177.pdf https://doi.org/10.1002/2013GB004678 en eng https://nora.nerc.ac.uk/id/eprint/507861/1/gbc20177.pdf Jiang, Zong-Pei; Tyrrell, Toby; Hydes, David J.; Dai, Minhan; Hartman, Susan E. orcid:0000-0002-6363-1331 . 2014 Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean. Global Biogeochemical Cycles, 28 (7). 729-742. https://doi.org/10.1002/2013GB004678 <https://doi.org/10.1002/2013GB004678> Publication - Article PeerReviewed 2014 ftnerc https://doi.org/10.1002/2013GB004678 2023-02-04T19:40:00Z The variability of total alkalinity (TA) and its relationship with salinity in the tropical and subtropical surface ocean were examined using data collected in various marine environments from a ship of opportunity. In the open ocean regions of the Atlantic, Pacific, and Indian Oceans, sea surface TA variability was observed to be mainly controlled by the simple dilution or concentration (SDC) effect of precipitation and evaporation, and the measured concentrations of TA agreed well with those predicted from salinity and temperature. Non-SDC changes in alkalinity in ocean margins and inland seas were examined by comparing the salinity-normalized alkalinity with that of the open ocean end-member. Non-SDC alkalinity additions to the western North Atlantic margin, eastern North Pacific margin, and Mediterranean Sea were identified, which mainly resulted from river inputs and shelf currents. In contrast, removal of TA through formation and sedimentation of calcium carbonate was observed to be an important control in the Red Sea. The concentration of the river end-member can only be reliably derived from the y intercept of TA-S regression (TAS0) in river-dominated systems such as estuaries and river plumes. In coastal regions where other processes (evaporation, shelf currents, upwelling, calcification, etc.) are more influential, TAS0 can significantly deviate from the river water concentration and hence be an unreliable indicator of it. Negative values of TAS0 can result from non-SDC TA removal at the low salinity end (relative to the salinity of the oceanic end-member) and/or non-SDC TA addition at high salinities (as occurs in the Mediterranean Sea). Article in Journal/Newspaper North Atlantic Natural Environment Research Council: NERC Open Research Archive Pacific Indian The ''Y'' ENVELOPE(-112.453,-112.453,57.591,57.591) Global Biogeochemical Cycles 28 7 729 742 |
institution |
Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The variability of total alkalinity (TA) and its relationship with salinity in the tropical and subtropical surface ocean were examined using data collected in various marine environments from a ship of opportunity. In the open ocean regions of the Atlantic, Pacific, and Indian Oceans, sea surface TA variability was observed to be mainly controlled by the simple dilution or concentration (SDC) effect of precipitation and evaporation, and the measured concentrations of TA agreed well with those predicted from salinity and temperature. Non-SDC changes in alkalinity in ocean margins and inland seas were examined by comparing the salinity-normalized alkalinity with that of the open ocean end-member. Non-SDC alkalinity additions to the western North Atlantic margin, eastern North Pacific margin, and Mediterranean Sea were identified, which mainly resulted from river inputs and shelf currents. In contrast, removal of TA through formation and sedimentation of calcium carbonate was observed to be an important control in the Red Sea. The concentration of the river end-member can only be reliably derived from the y intercept of TA-S regression (TAS0) in river-dominated systems such as estuaries and river plumes. In coastal regions where other processes (evaporation, shelf currents, upwelling, calcification, etc.) are more influential, TAS0 can significantly deviate from the river water concentration and hence be an unreliable indicator of it. Negative values of TAS0 can result from non-SDC TA removal at the low salinity end (relative to the salinity of the oceanic end-member) and/or non-SDC TA addition at high salinities (as occurs in the Mediterranean Sea). |
format |
Article in Journal/Newspaper |
author |
Jiang, Zong-Pei Tyrrell, Toby Hydes, David J. Dai, Minhan Hartman, Susan E. |
spellingShingle |
Jiang, Zong-Pei Tyrrell, Toby Hydes, David J. Dai, Minhan Hartman, Susan E. Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean |
author_facet |
Jiang, Zong-Pei Tyrrell, Toby Hydes, David J. Dai, Minhan Hartman, Susan E. |
author_sort |
Jiang, Zong-Pei |
title |
Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean |
title_short |
Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean |
title_full |
Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean |
title_fullStr |
Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean |
title_full_unstemmed |
Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean |
title_sort |
variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean |
publishDate |
2014 |
url |
http://nora.nerc.ac.uk/id/eprint/507861/ https://nora.nerc.ac.uk/id/eprint/507861/1/gbc20177.pdf https://doi.org/10.1002/2013GB004678 |
long_lat |
ENVELOPE(-112.453,-112.453,57.591,57.591) |
geographic |
Pacific Indian The ''Y'' |
geographic_facet |
Pacific Indian The ''Y'' |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/507861/1/gbc20177.pdf Jiang, Zong-Pei; Tyrrell, Toby; Hydes, David J.; Dai, Minhan; Hartman, Susan E. orcid:0000-0002-6363-1331 . 2014 Variability of alkalinity and the alkalinity-salinity relationship in the tropical and subtropical surface ocean. Global Biogeochemical Cycles, 28 (7). 729-742. https://doi.org/10.1002/2013GB004678 <https://doi.org/10.1002/2013GB004678> |
op_doi |
https://doi.org/10.1002/2013GB004678 |
container_title |
Global Biogeochemical Cycles |
container_volume |
28 |
container_issue |
7 |
container_start_page |
729 |
op_container_end_page |
742 |
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1766133815958306816 |