O2/Ar in surface seawater of the East China Sea(ESC)and Yellow Sea(YS)was observed by an underway measurement system using membrane inlet mass spectrometry in June-July 2018,and estimated the NCP in the mixed layer.The NCP characteristics of distribution and its regulating factors were analyzed in combination with hydrographic parameters and satellite data.An overall autotrophic condition was observed in the ECS and YS with an average △(O2/Ar)of(3.3±8.5)％,and an average NCP of(12.9±36.7)mmol C/(m2.d).The average △(O2/Ar)was(4.9±9.8)％and the NCP was(21.0±38.2)mmol C/(m2.d)in the ECS,showing a trend of decreasing offshore,which was affected by the high growth of phytoplankton promoted by the massive nutrient from terrestrial input.The average △(O2/Ar)was(1.6±6.6)％and the NCP was(4.8±33.3)mmol C/(m2·d)in the YS.The distribution of NCP in the YS was mainly influenced by nutrients and Yellow Sea Cold Water,with high values observed in the North Yellow Sea and low values in the South Yellow Sea.The correlation analysis showed that light and nutrients were the main factors controlling the distribution of NCP in the study area.
关键词
O2/Ar/群落净生产力/东海/黄海/生物泵/影响因素
Key words
O2/Ar/net community production/East China Sea/Yellow Sea/biological pump/influencing factors
维普
万方数据