Water mass characteristics and sill dynamics in a subpolar cold-water coral reef setting at Stjernsund, northern Norway
Water mass characteristics and sill dynamics in a subpolar cold-water coral reef setting at Stjernsund, northern Norway
复制标题
DOI：
10.1016/j.margeo.2010.05.009
复制
发表时间：
2011-03
期刊：
影响因子：
2.9
通讯作者：
A. Rüggeberg;S. Flögel;W. Dullo;K. Hissmann;A. Freiwald
中科院分区：
文献类型：
--
作者：
A. Rüggeberg;S. Flögel;W. Dullo;K. Hissmann;A. Freiwald
Stjernsund位于挪威北方北纬70.5°的副极地，在冰碛岩上有一个繁荣的冷水珊瑚礁群落。使用载人潜水器JAGO进行潜水，确定了岩床顶部和斜坡上不同的珊瑚礁区和沉积相。水文调查表明，不同的水团分布东部和西部的窗台。冬季模式水和挪威沿海水的变化取决于流入峡湾的径流和淡水。大西洋水动力学几乎完全是潮汐驱动的。高分辨率CTD时间序列覆盖了整个潮汐周期，表明混合过程发生在岩床以东。此外，不同的水深分布的活珊瑚的西部和东部斜坡的窗台描绘依赖于这些潮汐动力学。活珊瑚生长在27.5公斤米-3的等密度线以下，这是挪威沿海水域和大西洋水域的分界线。
The Stjernsund, located in subpolar setting at 70.5°N off northern Norway, hosts a thriving cold-water coral reef community on a morainic sill. Dives with manned submersible JAGO identified the different reef zones and sedimentary facies on top and on the slopes of the sill. Hydrographic investigations indicate different water mass distribution east and west of the sill. Winter Mode Water and Norwegian Coastal Water variability depends on the runoff and freshwater discharge into the fjord. Atlantic Water dynamics are almost entirely tidally driven. High-resolution CTD time series covering a full tidal cycle demonstrate mixing processes occurring east of the sill. Additionally, the different bathymetric distribution of living corals on the western and eastern slope of the sill portrays the dependence on these tidal dynamics. The living corals thrive just below the isopycnal of 27.5kg m−3, which marks the boundary between Norwegian Coastal Water and Atlantic Water.