Ocean Science
Ocean Science
OS
Articles | Volume 17, issue 1
Articles | Volume 17, issue 1
https://doi.org/10.5194/os-17-249-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-17-249-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 1
Research article
 | 
10 Feb 2021
Research article |  | 10 Feb 2021

High-resolution distributions of O2 / Ar on the northern slope of the South China Sea and estimates of net community production

Chuan Qin, Guiling Zhang, Wenjing Zheng, Yu Han, and Sumei Liu

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Cited articles

Bi, Q., Du, J., Wu, Y., Zhou, J., and Zhang, J.: Particulate organic carbon export flux by 234Th∕238U disequilibrium in the continental slope of the East China Sea, Acta Oceanol. Sin., 32, 67–73, https://doi.org/10.1007/s13131-013-0303-7, 2013.
Cai, P., Zhao, D., Wang, L., Huang, B., and Dai, M.: Role of particle stock and phytoplankton community structure in regulating particulate organic carbon export in a large marginal sea, J. Geophys. Res.-Oceans, 120, 2063–2095, https://doi.org/10.1002/2014JC010432, 2015.
Cai, W.: Estuarine and Coastal Ocean Carbon Paradox: CO2 Sinks or Sites of Terrestrial Carbon Incineration?, Ann. Rev. Mar. Sci., 3, 123–145, https://doi.org/10.1146/annurev-marine-120709-142723, 2011.
Cassar, N., DiFiore, P. J., Barnett, B. A., Bender, M. L., Bowie, A. R., Tilbrook, B., Petrou, K., Westwood, K. J., Wright, S. W., and Lefevre, D.: The influence of iron and light on net community production in the Subantarctic and Polar Frontal Zones, Biogeosciences, 8, 227–237, https://doi.org/10.5194/bg-8-227-2011, 2011.
Cassar, N., Nevison, C. D., and Manizza, M.: Correcting oceanic O2∕Ar-net community production estimates for vertical mixing using N2O observations, Geophys. Res. Lett., 41, 8961–8970, https://doi.org/10.1002/2014GL062040, 2014.
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We conducted an underway measurement of dissolved O2 / Ar using membrane inlet mass spectrometry and estimated net community production (NCP) in the South China Sea (SCS) in both summer and autumn. We found that nutrient content, especially nitrogen, is the dominant factor affecting primary production in the SCS. In the summer, we observed a rapid response of the ecosystem to episodic nutrient supply induced by eddies. This is the first report on NCP estimation based on O2 / Ar data in the SCS.
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