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

作　　者：TIAN Shichao JIN Haiyan GAO Shengquan ZHUANG Yanpei ZHANG Yang WANG Bin CHEN Jianfang 

机构地区：[1]Second Institute of Oceanography, State Oceanic Administration (SOA) [2]Laboratory of Marine Ecosystem and Biogeochemistry, SOA [3]State Key Laboratory of Satellite Ocean Environment Dynamics

出　　处：《Advances in Polar Science》2015年第1期55-62,共8页极地科学进展（英文版）

基　　金：supported by the Chinese Polar Environmental Comprehensive Investigation & Assessment Programs (Grant nos. CHINARE 2014-04-01-07, CHINARE 2014-02-01-05);the National Natural Science Foundation of China (Grant nos. 41276198, 41076135);Chinese Polar Science Strategy Research Foundation (Grant no. 20120104)

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.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 δ13C Great Wall Cove Ardley Cove ANTARCTICA 

分 类 号：P595[天文地球—地球化学] P941.61[天文地球—地质学]