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Longtime variation of phytoplankton in the South China Sea from the perspective of carbon fixation
Author(s): Teng Li; Yan Bai; Xiaoyan Chen; Qiankun Zhu; Fang Gong; Difeng Wang
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Paper Abstract

The ocean is a huge carbon pool in the earth, and about half of the anthropogenic emissions of carbon dioxide are absorbed by the ocean each year. By converting inorganic carbon into organic carbon, the photosynthesis process of phytoplankton affords an important way for carbon sequestration in the ocean. According to previous researches, primary production (NPP) and the structure of phytoplankton community are important in regulate the efficiency of biological carbon pump. This study examined the spatiotemporal variability of satellite remote sensing derived chlorophyll a concentration (Chla), phytoplankton carbon biomass (Carbon), composition ratio of micro-, nano- and pico- phytoplankton, NPP and integrated particulate organic carbon (IPOC) during 1998-2007 in the South China Sea (SCS). Micro-, nano-phytoplankton and NPP showed similar seasonal variation with highest values in winter (January) (especially in the western ocean of Luzon Strait) and lowest values in summer (July) in SCS. Chla, phytoplankton carbon biomass, and IPOC showed different seasonal trends with one peak values occurred in winter and lowest in spring. Two sampling areas (A, N:17-21°, E:117.5-120° and B, N:12.5-15°, E:112-119°) in SCS were selected based on spatial distribution of the standard deviation of research parameters mentioned above. Compared to Chla, phytoplankton carbon biomass, NPP and IPOC, the interannual changes of phytoplankton community structure were remarkable in the two areas. The fraction of micro- and nano- phytoplankton in SCS tend to rise when La Nina events occur. Our results contribute to an understanding of the response of phytoplankton to climate change in the marginal sea. To quantify the efficiency of biological carbon pump in this area, more attention should be paid to the development of remote sensing algorithms of export NPP (or POC export flux) as well as the regulate mechanism of export NPP.

Paper Details

Date Published: 13 October 2017
PDF: 11 pages
Proc. SPIE 10422, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017, 1042216 (13 October 2017); doi: 10.1117/12.2278038
Show Author Affiliations
Teng Li, PLA Univ. of Science and Technology (China)
State Key Lab. of Satellite Ocean Environment Dynamics (China)
Yan Bai, State Key Laboratory of Satellite Ocean Environment Dynamics (China)
Xiaoyan Chen, State Key Laboratory of Satellite Ocean Environment Dynamics (China)
Qiankun Zhu, State Key Laboratory of Satellite Ocean Environment Dynamics (China)
Fang Gong, State Key Lab. of Satellite Ocean Environment Dynamics (China)
Difeng Wang, State Key Lab. of Satellite Ocean Environment Dynamics (China)


Published in SPIE Proceedings Vol. 10422:
Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017
Charles R. Bostater; Stelios P. Mertikas; Xavier Neyt; Sergey Babichenko, Editor(s)

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