南极冬季威德尔海海冰物理结构与叶绿素a垂直分布特征

戴芳芳; 王自磐; 李志军; E.ALLHUSEN; G.DIECKMANN

南极冬季威德尔海海冰物理结构与叶绿素a垂直分布特征

1.
浙江万里学院生物与环境学院, 浙江宁波, 315100
2.
浙江万里学院生物与环境学院, 浙江宁波, 315100;国家海洋局海洋生态与生物地球化学过程重点实验室, 浙江杭州, 310012
3.
大连理工大学海岸和近海工程国家重点实验室, 辽宁,大连, 116024
4.
Alfred-Wegener极地与海洋研究所, Bremerhaven 27570

基金项目: 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

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出版历程
- 收稿日期: 2007-06-05
- 修回日期: 2008-03-25

Physical structure and vertical distribution of chlorophyll a in winter sea-ice from Weddlle Sea, Antarctica

1.
Zhejiang Wanli University, Ningbo 315100, China
2.
Zhejiang Wanli University, Ningbo 315100, China;Second Institute of Oceanography, Hangzhou 310012, China
3.
Dalian University of Technology, Dalian 116024, China
4.
Alfred Wegener Institute for Marine and Polar Research, Bremerhaven 27570, Germany

摘要

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/dm³,范围为2.10~84.40μg/dm³,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。
- 海冰结构 /
- 叶绿素a /
- 南极 /
- 冬季
Abstract: 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 seaice 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 2.10~84.40 μg/dm³ with a mean of 16.56 μg/dm³.The value of R (chlorophyll a/gorse of chlorophyll) ranged from 0.179~0.183.These high winter chlorophyll values indicate that primary produc-tion 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 rereats.
- winter sea-ice /
- physical structure /
- chloro phylla /
- Antarctica

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