Based on the data obtained in the offshore area (60°~63°S) of the Antarctic Peninsula during the 30th Chinese Antarctic Research Expedition,the distribution characteristics of dissolved organic carbon (DOC),total nitrogen (TN) and total phosphorus (TP) in the study area are analyzed and the control factors such as topography and water mass are discussed.The results show that in the summer of 2014,the concentration of DOC in the water mass of the study area varied from 40.47 to 78.08 μmol/L,with an average of 66.33 μmol/L;the concentration of TN varied from 4.24 to 29.54 μmol/L,with an average of 14.88 μmol/L;and the concentration of TP ranged from 0.80 to 2.85 μmol/L,with an average of 2.00 μmol/L.The concentration of DOC in the surface layer was higher along Section D1 in the northwest and Section D5 in the southeast and lower in the middle of the study sea.The concentrations of TN and TP in the surface layer were higher to the north and south of Section D1 and lower in the middle and eastern parts of the study area.The vertical distributions of DOC,TN and TP concentrations are considered to be closely related to the seabed topography and the water masses.The impediment of seabed topography to the water masses may cause the biochemical elements to redistribute vertically.The spatial distributions of DOC,TN and TP reflect the complex biochemical cycles in the offshore area of the Antarctic Peninsula.This study will provide scientific basis for the resources development and utilization and the environmental impact assessment in the Antarctic pole.%基于中国第30次南极科学考察在南极半岛(60°~63°S)近岸海域获取的调查资料,分析了该海域生物化学要素中溶解有机碳(DOC)、总氮(TN)和总磷(TP)分布特征并讨论地形和水团对其的影响.结果表明:2014年夏季南极半岛近岸海域水体DOC浓度变化范围为40.5~78.1 μmol/L,平均浓度为66.3 μmol/L;TN浓度变化范围为4.2~29.5 μmol/L,平均浓度为14.9 μmol/L;TP浓度变化范围为0.8~2.9 μmol/L,平均浓度为2.0 μmol/L.表层DOC呈现研究海域西北部D1断面和东南部D5断面浓度较高,中部DOC浓度较低;表层TN与TP浓度高值区出现在研究海域西部D1断面北部以及南部,中部和东部浓度较低;DOC,TN和TP浓度的垂直分布与海底地形和水团交汇密切相关,水团运动受阻于地形致使生物化学要素在垂直方向再分布.DOC,TN和TP空间分布反映了南极半岛近岸海域生物化学要素复杂的流通,将为合理开发和利用南极资源及环境影响评价提供科学依据.
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