Loading…

Contribution of non-carbonate anions to total alkalinity and overestimation of pCO 2 in New England and New Brunswick rivers

Total alkalinity (TAlk) has long been used to evaluate the buffering capacity of aquatic systems. TAlk has also been used, together with measurements of either pH or dissolved inorganic carbon (DIC), to indirectly estimate the partial pressure of carbon dioxide (pCO2) in inland waters, estuaries, an...

Full description

Saved in:
Bibliographic Details
Published in:Biogeosciences 2011-10, Vol.8 (10), p.3069-3076
Main Authors: Hunt, C. W., Salisbury, J. E., Vandemark, D.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c154t-acf410f961a8465a004bba6d4827c5510061ded5ea58b152698ae4a4509a8b533
cites cdi_FETCH-LOGICAL-c154t-acf410f961a8465a004bba6d4827c5510061ded5ea58b152698ae4a4509a8b533
container_end_page 3076
container_issue 10
container_start_page 3069
container_title Biogeosciences
container_volume 8
creator Hunt, C. W.
Salisbury, J. E.
Vandemark, D.
description Total alkalinity (TAlk) has long been used to evaluate the buffering capacity of aquatic systems. TAlk has also been used, together with measurements of either pH or dissolved inorganic carbon (DIC), to indirectly estimate the partial pressure of carbon dioxide (pCO2) in inland waters, estuaries, and marine systems. These estimates typically assume that carbonate and bicarbonate ions comprise nearly all the species contributing to TAlk; however, other inorganic and organic acids have the potential to contribute significant non-carbonate alkalinity. To evaluate the potential for error in using TAlk to estimate pCO2, we measured pH, TAlk, and DIC in samples of river water. Estimates of pCO2 derived from TAlk and pH measurements were higher than pCO2 estimates derived from DIC and pH by 13–66%. We infer that this overestimate is due to the presence of significant non-carbonate alkalinity (NC-Alk). This study also describes the relative proportions of carbonate- and non-carbonate alkalinity measured in 15 river systems located in northern New England (USA) and New Brunswick (Canada). NC-Alk represents a significant buffering component in these river systems (21–∼100% of TAlk), and failure to account for NC-Alk (which cannot directly contribute to pCO2) leads to the overestimation of carbon dioxide release to the atmosphere.
doi_str_mv 10.5194/bg-8-3069-2011
format article
fullrecord <record><control><sourceid>crossref</sourceid><recordid>TN_cdi_crossref_primary_10_5194_bg_8_3069_2011</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>10_5194_bg_8_3069_2011</sourcerecordid><originalsourceid>FETCH-LOGICAL-c154t-acf410f961a8465a004bba6d4827c5510061ded5ea58b152698ae4a4509a8b533</originalsourceid><addsrcrecordid>eNpNkN9LwzAQx4MoOKevPucfyEzaJEsftUwnDPeiz-HSpiWuJiPJHAP_eFtUEO64n9_j-CB0y-hCsIrfmZ4oUlJZkYIydoZmbFlIwpmqzv_ll-gqpXdKS0WVmKGvOvgcnTlkFzwOHfbBkwaiCR6yxeDHdsI5jJZhwDDsYHDe5dM4anH4tNGm7D7gT76vt7jAzuMXe8Qr3w_T2uRT_RAPPh1ds8PRjcp0jS46GJK9-Y1z9Pa4eq3XZLN9eq7vN6RhgmcCTccZ7SrJQHEpgFJuDMiWq2LZCMEolay1rbAglGGikJUCy4ELWoEyoiznaPFzt4khpWg7vY_jz_GkGdUTO216rfTETk_sym8QrmN7</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Contribution of non-carbonate anions to total alkalinity and overestimation of pCO 2 in New England and New Brunswick rivers</title><source>Publicly Available Content Database (Proquest) (PQ_SDU_P3)</source><source>DOAJ Directory of Open Access Journals</source><creator>Hunt, C. W. ; Salisbury, J. E. ; Vandemark, D.</creator><creatorcontrib>Hunt, C. W. ; Salisbury, J. E. ; Vandemark, D.</creatorcontrib><description>Total alkalinity (TAlk) has long been used to evaluate the buffering capacity of aquatic systems. TAlk has also been used, together with measurements of either pH or dissolved inorganic carbon (DIC), to indirectly estimate the partial pressure of carbon dioxide (pCO2) in inland waters, estuaries, and marine systems. These estimates typically assume that carbonate and bicarbonate ions comprise nearly all the species contributing to TAlk; however, other inorganic and organic acids have the potential to contribute significant non-carbonate alkalinity. To evaluate the potential for error in using TAlk to estimate pCO2, we measured pH, TAlk, and DIC in samples of river water. Estimates of pCO2 derived from TAlk and pH measurements were higher than pCO2 estimates derived from DIC and pH by 13–66%. We infer that this overestimate is due to the presence of significant non-carbonate alkalinity (NC-Alk). This study also describes the relative proportions of carbonate- and non-carbonate alkalinity measured in 15 river systems located in northern New England (USA) and New Brunswick (Canada). NC-Alk represents a significant buffering component in these river systems (21–∼100% of TAlk), and failure to account for NC-Alk (which cannot directly contribute to pCO2) leads to the overestimation of carbon dioxide release to the atmosphere.</description><identifier>ISSN: 1726-4189</identifier><identifier>EISSN: 1726-4189</identifier><identifier>DOI: 10.5194/bg-8-3069-2011</identifier><language>eng</language><ispartof>Biogeosciences, 2011-10, Vol.8 (10), p.3069-3076</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c154t-acf410f961a8465a004bba6d4827c5510061ded5ea58b152698ae4a4509a8b533</citedby><cites>FETCH-LOGICAL-c154t-acf410f961a8465a004bba6d4827c5510061ded5ea58b152698ae4a4509a8b533</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,864,27924,27925</link.rule.ids></links><search><creatorcontrib>Hunt, C. W.</creatorcontrib><creatorcontrib>Salisbury, J. E.</creatorcontrib><creatorcontrib>Vandemark, D.</creatorcontrib><title>Contribution of non-carbonate anions to total alkalinity and overestimation of pCO 2 in New England and New Brunswick rivers</title><title>Biogeosciences</title><description>Total alkalinity (TAlk) has long been used to evaluate the buffering capacity of aquatic systems. TAlk has also been used, together with measurements of either pH or dissolved inorganic carbon (DIC), to indirectly estimate the partial pressure of carbon dioxide (pCO2) in inland waters, estuaries, and marine systems. These estimates typically assume that carbonate and bicarbonate ions comprise nearly all the species contributing to TAlk; however, other inorganic and organic acids have the potential to contribute significant non-carbonate alkalinity. To evaluate the potential for error in using TAlk to estimate pCO2, we measured pH, TAlk, and DIC in samples of river water. Estimates of pCO2 derived from TAlk and pH measurements were higher than pCO2 estimates derived from DIC and pH by 13–66%. We infer that this overestimate is due to the presence of significant non-carbonate alkalinity (NC-Alk). This study also describes the relative proportions of carbonate- and non-carbonate alkalinity measured in 15 river systems located in northern New England (USA) and New Brunswick (Canada). NC-Alk represents a significant buffering component in these river systems (21–∼100% of TAlk), and failure to account for NC-Alk (which cannot directly contribute to pCO2) leads to the overestimation of carbon dioxide release to the atmosphere.</description><issn>1726-4189</issn><issn>1726-4189</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNpNkN9LwzAQx4MoOKevPucfyEzaJEsftUwnDPeiz-HSpiWuJiPJHAP_eFtUEO64n9_j-CB0y-hCsIrfmZ4oUlJZkYIydoZmbFlIwpmqzv_ll-gqpXdKS0WVmKGvOvgcnTlkFzwOHfbBkwaiCR6yxeDHdsI5jJZhwDDsYHDe5dM4anH4tNGm7D7gT76vt7jAzuMXe8Qr3w_T2uRT_RAPPh1ds8PRjcp0jS46GJK9-Y1z9Pa4eq3XZLN9eq7vN6RhgmcCTccZ7SrJQHEpgFJuDMiWq2LZCMEolay1rbAglGGikJUCy4ELWoEyoiznaPFzt4khpWg7vY_jz_GkGdUTO216rfTETk_sym8QrmN7</recordid><startdate>20111031</startdate><enddate>20111031</enddate><creator>Hunt, C. W.</creator><creator>Salisbury, J. E.</creator><creator>Vandemark, D.</creator><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20111031</creationdate><title>Contribution of non-carbonate anions to total alkalinity and overestimation of pCO 2 in New England and New Brunswick rivers</title><author>Hunt, C. W. ; Salisbury, J. E. ; Vandemark, D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c154t-acf410f961a8465a004bba6d4827c5510061ded5ea58b152698ae4a4509a8b533</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hunt, C. W.</creatorcontrib><creatorcontrib>Salisbury, J. E.</creatorcontrib><creatorcontrib>Vandemark, D.</creatorcontrib><collection>CrossRef</collection><jtitle>Biogeosciences</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hunt, C. W.</au><au>Salisbury, J. E.</au><au>Vandemark, D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Contribution of non-carbonate anions to total alkalinity and overestimation of pCO 2 in New England and New Brunswick rivers</atitle><jtitle>Biogeosciences</jtitle><date>2011-10-31</date><risdate>2011</risdate><volume>8</volume><issue>10</issue><spage>3069</spage><epage>3076</epage><pages>3069-3076</pages><issn>1726-4189</issn><eissn>1726-4189</eissn><abstract>Total alkalinity (TAlk) has long been used to evaluate the buffering capacity of aquatic systems. TAlk has also been used, together with measurements of either pH or dissolved inorganic carbon (DIC), to indirectly estimate the partial pressure of carbon dioxide (pCO2) in inland waters, estuaries, and marine systems. These estimates typically assume that carbonate and bicarbonate ions comprise nearly all the species contributing to TAlk; however, other inorganic and organic acids have the potential to contribute significant non-carbonate alkalinity. To evaluate the potential for error in using TAlk to estimate pCO2, we measured pH, TAlk, and DIC in samples of river water. Estimates of pCO2 derived from TAlk and pH measurements were higher than pCO2 estimates derived from DIC and pH by 13–66%. We infer that this overestimate is due to the presence of significant non-carbonate alkalinity (NC-Alk). This study also describes the relative proportions of carbonate- and non-carbonate alkalinity measured in 15 river systems located in northern New England (USA) and New Brunswick (Canada). NC-Alk represents a significant buffering component in these river systems (21–∼100% of TAlk), and failure to account for NC-Alk (which cannot directly contribute to pCO2) leads to the overestimation of carbon dioxide release to the atmosphere.</abstract><doi>10.5194/bg-8-3069-2011</doi><tpages>8</tpages></addata></record>
fulltext fulltext
identifier ISSN: 1726-4189
ispartof Biogeosciences, 2011-10, Vol.8 (10), p.3069-3076
issn 1726-4189
1726-4189
language eng
recordid cdi_crossref_primary_10_5194_bg_8_3069_2011
source Publicly Available Content Database (Proquest) (PQ_SDU_P3); DOAJ Directory of Open Access Journals
title Contribution of non-carbonate anions to total alkalinity and overestimation of pCO 2 in New England and New Brunswick rivers
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-28T14%3A41%3A52IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-crossref&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Contribution%20of%20non-carbonate%20anions%20to%20total%20alkalinity%20and%20overestimation%20of%20pCO%202%20in%20New%20England%20and%20New%20Brunswick%20rivers&rft.jtitle=Biogeosciences&rft.au=Hunt,%20C.%20W.&rft.date=2011-10-31&rft.volume=8&rft.issue=10&rft.spage=3069&rft.epage=3076&rft.pages=3069-3076&rft.issn=1726-4189&rft.eissn=1726-4189&rft_id=info:doi/10.5194/bg-8-3069-2011&rft_dat=%3Ccrossref%3E10_5194_bg_8_3069_2011%3C/crossref%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c154t-acf410f961a8465a004bba6d4827c5510061ded5ea58b152698ae4a4509a8b533%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true