极地研究

极地研究

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Sources and distribution of particulate organic carbon in Great Wall Cove and Ardley Cove, King George Island, West Antarctica

TIAN Shichao1,2, JIN Haiyan1,2,3*, GAO Shengquan1,2, ZHUANG Yanpei1,2, ZHANG Yang1, WANG Bin1,2 & CHEN Jianfang1,2,3   

  1. 1 Second Institute of Oceanography, State Oceanic Administration (SOA), Hangzhou 310012, China;
    2 Laboratory of Marine Ecosystem and Biogeochemistry, SOA, Hangzhou 310012, China;
    3 State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou 310012, China
  • 出版日期:1965-03-30 发布日期:1965-03-30
  • 通讯作者: JIN Haiyan

Sources and distribution of particulate organic carbon in Great Wall Cove and Ardley Cove, King George Island, West Antarctica

TIAN Shichao1,2, JIN Haiyan1,2,3*, GAO Shengquan1,2, ZHUANG Yanpei1,2, ZHANG Yang1, WANG Bin1,2 & CHEN Jianfang1,2,3   

  1. 1 Second Institute of Oceanography, State Oceanic Administration (SOA), Hangzhou 310012, China;
    2 Laboratory of Marine Ecosystem and Biogeochemistry, SOA, Hangzhou 310012, China;
    3 State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou 310012, China
  • Online:1965-03-30 Published:1965-03-30
  • Contact: JIN Haiyan

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摘要： Concentrations of chlorophyll-a (Chl-a), particulate organic carbon (POC) and its stable carbon isotope composition (δ13C) were analyzed to investigate the biogeochemical characteristics and sources of POC in Great Wall Cove (GWC) and Ardley Cove (AC) during the austral summer. POC concentrations ranged from 50.51 to 115.41 μg·L−1 (mean±1 standard deviation: 77.69±17.27 μg·L−1) in GWC and from 63.42 to 101.79 μg·L−1 (82.67±11.83 μg·L−1) in AC. The POC δ13C ranged from −30.83‰ to −26.12‰ (−27.40‰±0.96‰) in GWC and from −28.21‰ to −26.65‰ (−27.45‰±0.47‰) in AC. The temperature and salinity results showed distinct runoff signals in both GWC and AC, although the δ13C data and POC distribution indicate a negligible influence of land sources upon POC. The δ13C values suggest that POC is of predominantly marine origin. The POC/Chl-a ratio and the relationship between POC and Chl-a indicate that phytoplankton, organic detritus and heterotrophic organisms are significant contributors to POC in GWC and AC.

关键词: POC, Chl-a, &delta, 13C, Great Wall Cove, Ardley Cove, Antarctica

Abstract: Concentrations of chlorophyll-a (Chl-a), particulate organic carbon (POC) and its stable carbon isotope composition (δ13C) were analyzed to investigate the biogeochemical characteristics and sources of POC in Great Wall Cove (GWC) and Ardley Cove (AC) during the austral summer. POC concentrations ranged from 50.51 to 115.41 μg·L−1 (mean±1 standard deviation: 77.69±17.27 μg·L−1) in GWC and from 63.42 to 101.79 μg·L−1 (82.67±11.83 μg·L−1) in AC. The POC δ13C ranged from −30.83‰ to −26.12‰ (−27.40‰±0.96‰) in GWC and from −28.21‰ to −26.65‰ (−27.45‰±0.47‰) in AC. The temperature and salinity results showed distinct runoff signals in both GWC and AC, although the δ13C data and POC distribution indicate a negligible influence of land sources upon POC. The δ13C values suggest that POC is of predominantly marine origin. The POC/Chl-a ratio and the relationship between POC and Chl-a indicate that phytoplankton, organic detritus and heterotrophic organisms are significant contributors to POC in GWC and AC.

Key words: POC, Chl-a, δ13C, Great Wall Cove, Ardley Cove, Antarctica