Variations in the advection of Calanus finmarchicus onto the Faroe Shelf
Variations in the advection of Calanus finmarchicus onto the Faroe Shelf
复制标题
芬马奇库斯平流到法罗陆架的变化
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
B. Hansen
中科院分区：
文献类型：
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作者：
E. Gaard;B. Hansen
桡足类Calanus finmarchicus是法罗高原海洋生态系统的主导因素，但其丰度变化很大。春季和夏季陆架上观察到哲水蚤丰度存在约一个数量级的年际差异。冬季，法罗高原上几乎找不到 C. finmarchicus，但在春季和夏季，它通过平流从近海输入。 4 月份在大陆架上进口的越冬 C. finmarchicus 数量的变化远大于为该地区提供食物的近海水域，流入速率的变化可能是主要的解释。对陆架水冲刷率的独立估计显示出与陆架上 C. finmarchicus 生物量的年际变化类似数量级的变化。长期的风应力，尤其是来自西南方向的风应力，会增加冲刷速率，并且有一些观测证据表明陆架上的 C. finmarchicus 丰度与流入水量之间存在关系。
The copepod Calanus finmarchicus is a dominant factor in the marine ecosystem on the Faroe Plateau, but its abundance is highly variable. Interannual differences of about one order of magnitude in Calanus abundance were observed on the shelf in spring and summer. In winter, C. finmarchicus is scarcely found on the Faroe Plateau, but during spring and summer it is imported from offshore by advection. Variations in the numbers of imported overwintered C. finmarchicus on the shelf in April are much larger than in the offshore waters feeding the area, and variability in inflow rates is likely the major explanation. Independent estimates of flushing rates for the shelf water exhibit variations of a similar order of magnitude as the interannual variations in the biomass of C. finmarchicus on the shelf. Prolonged windstress, especially from the southwest, increases the flushing rate, and there is some observational evidence of a relationship between C. finmarchicus abundance on the shelf and water inflow.