Dynamics of the Carbonate System in a Large Continental Shelf System Under the Influence of Both a River Plume and Coastal Upwelling
We examined the dynamics of the carbonate system in a complex mixing scheme with enhanced biological consumption modulated by both a river plume and summer coastal upwelling in a large shelf system, the northern South China Sea (NSCS) shelf. The plume waters originated from a large flooding upstream...
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ftunivsthongkong:oai:repository.ust.hk:1783.1-34805 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
The Hong Kong University of Science and Technology: HKUST Institutional Repository |
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ftunivsthongkong |
language |
English |
description |
We examined the dynamics of the carbonate system in a complex mixing scheme with enhanced biological consumption modulated by both a river plume and summer coastal upwelling in a large shelf system, the northern South China Sea (NSCS) shelf. The plume waters originated from a large flooding upstream the Pearl River, and extended from the mouth of the Pearl River estuary to the middle shelf and were characterized by low dissolved inorganic carbon (DIC) and total alkalinity (TAlk), and a high aragonite saturation state (Omega(arag)). In contrast, the upwelled water occupying the nearshore area was distinguished by high DIC and TAlk and a low Omega(arag). While the dynamics of the carbonate system were largely shaped by physical mixing through plume and upwelling processes between the plume water, the offshore subsurface water and the offshore surface water, biological consumption of DIC was observable in both the river plume and the coastal upwelling areas and contributed to the elevated Omega(arag) during their pathway. Correlations between salinity normalized TAlk and DIC indicated that organic carbon production rather than biocalcification exclusively induced the DIC removal. By using a three end-member mixing model, we estimated the net community productivity in the plume water and the upwelled water to be 36 +/- 19 mmol C m(-2) d(-1) and 23 +/- 26 mmol C m(-2) d(-1), respectively. With the combination of stoichiometric relationship analysis of the carbonate system and applying the three end-member mixing model, we successfully differentiated semiquantitatively the biologically mediated DIC variations from its overall mixing control. We also attempted to link this natural process to the carbonate saturation on the NSCS shelf, contending that at present natural factors associated with the river plume and the coastal upwelling largely modulate the dynamics of the carbonate system on the NSCS shelf, whereas anthropogenic stressors such as ocean acidification currently play a relatively minor role. |
format |
Article in Journal/Newspaper |
author |
Cao, Zhimian Dai, Minhan Zheng, Nan Wang, Deli Li, Qian Zhai, Weidong Meng, Feifei Gan, Jianping |
spellingShingle |
Cao, Zhimian Dai, Minhan Zheng, Nan Wang, Deli Li, Qian Zhai, Weidong Meng, Feifei Gan, Jianping Dynamics of the Carbonate System in a Large Continental Shelf System Under the Influence of Both a River Plume and Coastal Upwelling |
author_facet |
Cao, Zhimian Dai, Minhan Zheng, Nan Wang, Deli Li, Qian Zhai, Weidong Meng, Feifei Gan, Jianping |
author_sort |
Cao, Zhimian |
title |
Dynamics of the Carbonate System in a Large Continental Shelf System Under the Influence of Both a River Plume and Coastal Upwelling |
title_short |
Dynamics of the Carbonate System in a Large Continental Shelf System Under the Influence of Both a River Plume and Coastal Upwelling |
title_full |
Dynamics of the Carbonate System in a Large Continental Shelf System Under the Influence of Both a River Plume and Coastal Upwelling |
title_fullStr |
Dynamics of the Carbonate System in a Large Continental Shelf System Under the Influence of Both a River Plume and Coastal Upwelling |
title_full_unstemmed |
Dynamics of the Carbonate System in a Large Continental Shelf System Under the Influence of Both a River Plume and Coastal Upwelling |
title_sort |
dynamics of the carbonate system in a large continental shelf system under the influence of both a river plume and coastal upwelling |
publishDate |
2011 |
url |
http://repository.ust.hk/ir/Record/1783.1-34805 https://doi.org/10.1029/2010JG001596 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=0148-0227&rft.volume=116&rft.issue=2&rft.date=2011&rft.spage=&rft.aulast=Cao&rft.aufirst=Zhimian%7C&rft.atitle=Dynamics%20of%20the%20carbonate%20system%20in%20a%20large%20continental%20shelf%20system%20under%20the%20influence%20of%20both%20a%20river%20plume%20and%20coastal%20upwelling&rft.title=Journal%20of%20Geophysical%20Research%3A%20Biogeosciences http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000290621200001 http://www.scopus.com/record/display.url?eid=2-s2.0-79957526172&origin=inward |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://repository.ust.hk/ir/Record/1783.1-34805 Journal of Geophysical Research: Biogeosciences, v. 116, (2), June 2011, article number G02010 2169-8953 https://doi.org/10.1029/2010JG001596 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=0148-0227&rft.volume=116&rft.issue=2&rft.date=2011&rft.spage=&rft.aulast=Cao&rft.aufirst=Zhimian%7C&rft.atitle=Dynamics%20of%20the%20carbonate%20system%20in%20a%20large%20continental%20shelf%20system%20under%20the%20influence%20of%20both%20a%20river%20plume%20and%20coastal%20upwelling&rft.title=Journal%20of%20Geophysical%20Research%3A%20Biogeosciences http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000290621200001 http://www.scopus.com/record/display.url?eid=2-s2.0-79957526172&origin=inward |
op_doi |
https://doi.org/10.1029/2010JG001596 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
G2 |
_version_ |
1766159356646129664 |
spelling |
ftunivsthongkong:oai:repository.ust.hk:1783.1-34805 2023-05-15T17:52:02+02:00 Dynamics of the Carbonate System in a Large Continental Shelf System Under the Influence of Both a River Plume and Coastal Upwelling Cao, Zhimian Dai, Minhan Zheng, Nan Wang, Deli Li, Qian Zhai, Weidong Meng, Feifei Gan, Jianping 2011 http://repository.ust.hk/ir/Record/1783.1-34805 https://doi.org/10.1029/2010JG001596 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=0148-0227&rft.volume=116&rft.issue=2&rft.date=2011&rft.spage=&rft.aulast=Cao&rft.aufirst=Zhimian%7C&rft.atitle=Dynamics%20of%20the%20carbonate%20system%20in%20a%20large%20continental%20shelf%20system%20under%20the%20influence%20of%20both%20a%20river%20plume%20and%20coastal%20upwelling&rft.title=Journal%20of%20Geophysical%20Research%3A%20Biogeosciences http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000290621200001 http://www.scopus.com/record/display.url?eid=2-s2.0-79957526172&origin=inward English eng http://repository.ust.hk/ir/Record/1783.1-34805 Journal of Geophysical Research: Biogeosciences, v. 116, (2), June 2011, article number G02010 2169-8953 https://doi.org/10.1029/2010JG001596 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=0148-0227&rft.volume=116&rft.issue=2&rft.date=2011&rft.spage=&rft.aulast=Cao&rft.aufirst=Zhimian%7C&rft.atitle=Dynamics%20of%20the%20carbonate%20system%20in%20a%20large%20continental%20shelf%20system%20under%20the%20influence%20of%20both%20a%20river%20plume%20and%20coastal%20upwelling&rft.title=Journal%20of%20Geophysical%20Research%3A%20Biogeosciences http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000290621200001 http://www.scopus.com/record/display.url?eid=2-s2.0-79957526172&origin=inward Article 2011 ftunivsthongkong https://doi.org/10.1029/2010JG001596 2020-11-13T01:00:41Z We examined the dynamics of the carbonate system in a complex mixing scheme with enhanced biological consumption modulated by both a river plume and summer coastal upwelling in a large shelf system, the northern South China Sea (NSCS) shelf. The plume waters originated from a large flooding upstream the Pearl River, and extended from the mouth of the Pearl River estuary to the middle shelf and were characterized by low dissolved inorganic carbon (DIC) and total alkalinity (TAlk), and a high aragonite saturation state (Omega(arag)). In contrast, the upwelled water occupying the nearshore area was distinguished by high DIC and TAlk and a low Omega(arag). While the dynamics of the carbonate system were largely shaped by physical mixing through plume and upwelling processes between the plume water, the offshore subsurface water and the offshore surface water, biological consumption of DIC was observable in both the river plume and the coastal upwelling areas and contributed to the elevated Omega(arag) during their pathway. Correlations between salinity normalized TAlk and DIC indicated that organic carbon production rather than biocalcification exclusively induced the DIC removal. By using a three end-member mixing model, we estimated the net community productivity in the plume water and the upwelled water to be 36 +/- 19 mmol C m(-2) d(-1) and 23 +/- 26 mmol C m(-2) d(-1), respectively. With the combination of stoichiometric relationship analysis of the carbonate system and applying the three end-member mixing model, we successfully differentiated semiquantitatively the biologically mediated DIC variations from its overall mixing control. We also attempted to link this natural process to the carbonate saturation on the NSCS shelf, contending that at present natural factors associated with the river plume and the coastal upwelling largely modulate the dynamics of the carbonate system on the NSCS shelf, whereas anthropogenic stressors such as ocean acidification currently play a relatively minor role. Article in Journal/Newspaper Ocean acidification The Hong Kong University of Science and Technology: HKUST Institutional Repository Journal of Geophysical Research 116 G2 |