摘要
１９９２年３－５月极星号ＡＮＴ／Ｘ３秋季航次，对南极威德尔海东北海域浮冰区形成期新冰生态结构进行考察研究。结果表明，海冰物理结构特征与海冰生成环境及其形成过程有很大关系。冰体结构以颗粒冰、柱状冰以及混合冰为主，以颗粒冰为主结构的海冰较多地聚集浮游生物细胞，消耗部分冰中营养盐，柱状冰较少聚集生物细胞，其营养盐波动较小。同时，新形成期海冰中，叶绿素含量普遍低于一年冰，而营养盐含量则较高，基本处于初始状态，由此表明，海冰中生命活动随海冰冰龄增加而不断增强。
Textural composition, chlorophyll a and nutrients (phosphate, nitrate and silicate) of newly formed sea ice of the Weddell Sea, Antarctica, were analyzed during the period of austral autumn in 1992. Frazil ice, congelation ice and mixture of frazil/congelation ice were main textural composition types, which were formed in related conditions at the sea. The mean concentrations of chlorophyll a and nutrients in the sea ice varied considerably with ice texture. The higher concentration of chlorophyll a occurred mostly in ice floe consisting predominantly or mainly of frazil ice. The concentration of nutrients showed an inverse relationship with frazil ice, being significantly lower than that in the congelation ice. This is due to subsequent microalgae growth using the available nutrients in the sea ice. The data by analysis of the one year old sea ice with higher chlorophyll a correlated to lower nutrients supports the extrapolation as above.
出处
《极地研究》
CAS
CSCD
1997年第1期9-17,共9页
Chinese Journal of Polar Research
