摘要
2006年8—10月极星号ANT／XXIII-7航次，对南极威德尔海西北海域浮冰区进行海冰综合考察，采用海冰物理学、海冰化学和海冰生态学等多学科现场同步观测取样与分析研究新方法。结果显示，测区21个冰站不同冰龄和不同结构类型的海冰冰芯，叶绿素a含量总平均值为16．56μg／dm^3，范围为2．10～84．40μg／dm^3，叶绿素a相对总量的R值均值为0．79～0．83。冰体叶绿素a含量与分布取决于海冰冰晶物理结构及其所处冰层部位，并和海冰生成环境、冰体发育和成冰过程密切相关。研究结果证实南极冬季海冰叶绿素a含量普遍处于较高水平，海冰冰藻具有较强活性，由此表明从整体上南极冬季海冰具有较高初级生产能力。这对正确分析估算冬季南极海洋生物生产，重新评估南大洋碳通量及其在全球气候变化中的贡献，具有重要科学意义。
The investigation on sea-ice research in combination with physics, chemistry and ecology was carried out in North--Western of Weddell Sea, Antarctica, during the cruise of ANT/XXIII-7 on board POLARSTERN in the austral winter （Aug--Oct） 2006. Textural analyses of sea ice cores were carried out and the results related to the distribution of chlorophyll a in ice cores. The mean concentrations of chlorophyll a in the sea ice varied considerably with ice texture. The concentration of chlorophyll per core a ranged from 2.10～84. 40μg/dm^3 with a mean of 16.56 μg/dm^3. The value of R （chlorophyll a / gorse of chlorophyll） ranged from 0. 79～0.83. These high winter chlorophyll values indicate that primary production was considerable and confirm that there is significant primary production in Antarctic sea ice during winter and thus probably constitutes a major proportion of Southern Ocean primary production and carbon flux before the sea ice retreats.
出处
《海洋学报》
CAS
CSCD
北大核心
2008年第4期104-113,共10页
基金
德国AWI极地与海洋研究所所长基金
浙江万里学院南极专项基金资助
关键词
海冰结构
叶绿素A
南极
冬季
winter sea-ice
physical structure
chlorophyll a
Antarctica
