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Seasonal cycle of N:P:TA stoichiometry as a modulator of CO2 buffering in eastern boundary upwelling systems

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dc.contributor.author Gregor, L
dc.contributor.author Monteiro, Pedro MS
dc.date.accessioned 2014-06-17T09:50:27Z
dc.date.available 2014-06-17T09:50:27Z
dc.date.issued 2013-10
dc.identifier.citation Gregor, L and Monteiro, P.M.S. 2013. Seasonal cycle of N:P:TA stoichiometry as a modulator of CO2 buffering in eastern boundary upwelling systems. Geophysical Research Letters, vol. 40(20), pp 5429-5434 en_US
dc.identifier.issn 0094-8276
dc.identifier.uri http://onlinelibrary.wiley.com/doi/10.1002/2013GL058036/abstract
dc.identifier.uri http://hdl.handle.net/10204/7441
dc.description Copyright: 2013 American Geophysical Union (AGU). Published in Geophysical Research Letters, vol. 40(20), pp 5429-5434 en_US
dc.description.abstract In this study we use the southern Benguela upwelling system to investigate the role of nutrient and carbon stoichiometry on carbonate dynamics in eastern boundary upwelling systems. Six months in 2010 were sampled along a cross-shelf transect. Data were classified into summer, autumn, and winter. Nitrate, phosphate, dissolved inorganic carbon, and total alkalinity ratios were used in a stoichiometric reconstruction model to determine the contribution of biogeochemical processes on a parcel of water as it upwelled. Deviations from the Redfield ratio were dominated by denitrification and sulfate reduction in the subsurface waters. The N:P ratio was lowest (7.2) during autumn once anoxic waters had formed. Total alkalinity (TA) generation by anaerobic remineralization decreased pCO(sub2) by 227 µatm. Ventilation during summer and winter resulted in elevated N:P ratios (12.3). We propose that anaerobic production of TA has an important regional effect in mitigating naturally high CO(sub2) and making upwelled waters less corrosive. en_US
dc.language.iso en en_US
dc.publisher American Geophysical Union (AGU) en_US
dc.relation.ispartofseries Workflow;12852
dc.subject N:P:TA stoichiometry en_US
dc.subject Benguela upwelling en_US
dc.subject Southern Benguela en_US
dc.subject Climate research en_US
dc.subject Carbon stoichiometry en_US
dc.subject Stoichiometric reconstruction model en_US
dc.title Seasonal cycle of N:P:TA stoichiometry as a modulator of CO2 buffering in eastern boundary upwelling systems en_US
dc.type Article en_US
dc.identifier.apacitation Gregor, L., & Monteiro, P. M. (2013). Seasonal cycle of N:P:TA stoichiometry as a modulator of CO2 buffering in eastern boundary upwelling systems. http://hdl.handle.net/10204/7441 en_ZA
dc.identifier.chicagocitation Gregor, L, and Pedro MS Monteiro "Seasonal cycle of N:P:TA stoichiometry as a modulator of CO2 buffering in eastern boundary upwelling systems." (2013) http://hdl.handle.net/10204/7441 en_ZA
dc.identifier.vancouvercitation Gregor L, Monteiro PM. Seasonal cycle of N:P:TA stoichiometry as a modulator of CO2 buffering in eastern boundary upwelling systems. 2013; http://hdl.handle.net/10204/7441. en_ZA
dc.identifier.ris TY - Article AU - Gregor, L AU - Monteiro, Pedro MS AB - In this study we use the southern Benguela upwelling system to investigate the role of nutrient and carbon stoichiometry on carbonate dynamics in eastern boundary upwelling systems. Six months in 2010 were sampled along a cross-shelf transect. Data were classified into summer, autumn, and winter. Nitrate, phosphate, dissolved inorganic carbon, and total alkalinity ratios were used in a stoichiometric reconstruction model to determine the contribution of biogeochemical processes on a parcel of water as it upwelled. Deviations from the Redfield ratio were dominated by denitrification and sulfate reduction in the subsurface waters. The N:P ratio was lowest (7.2) during autumn once anoxic waters had formed. Total alkalinity (TA) generation by anaerobic remineralization decreased pCO(sub2) by 227 µatm. Ventilation during summer and winter resulted in elevated N:P ratios (12.3). We propose that anaerobic production of TA has an important regional effect in mitigating naturally high CO(sub2) and making upwelled waters less corrosive. DA - 2013-10 DB - ResearchSpace DP - CSIR KW - N:P:TA stoichiometry KW - Benguela upwelling KW - Southern Benguela KW - Climate research KW - Carbon stoichiometry KW - Stoichiometric reconstruction model LK - https://researchspace.csir.co.za PY - 2013 SM - 0094-8276 T1 - Seasonal cycle of N:P:TA stoichiometry as a modulator of CO2 buffering in eastern boundary upwelling systems TI - Seasonal cycle of N:P:TA stoichiometry as a modulator of CO2 buffering in eastern boundary upwelling systems UR - http://hdl.handle.net/10204/7441 ER - en_ZA


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