A field observation on hydrodynamic and thermal environments of a fringing reef at Ishigaki Island under typhoon and normal atmospheric conditions
A field observation on hydrodynamic and thermal environments of a fringing reef at Ishigaki Island under typhoon and normal atmospheric conditions
复制标题
台风和正常大气条件下石垣岛岸礁水动力和热环境的实地观测
DOI：
10.1007/s00338-001-0188-3
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发表时间：
2001
期刊：
影响因子：
3.5
通讯作者：
Kensui Wakaki
中科院分区：
文献类型：
--
作者：
K. Nadaoka;Y. Nihei;Ryoko Kumano;T. Yokobori;T. Omija;Kensui Wakaki
为了研究内陆和近海可能影响下的边缘珊瑚礁的水动力和热环境，我们在日本冲绳石垣岛的白穗礁进行了实地调查，在礁内外部署了16个系泊浮标，在浮标上安装了各种传感器，用于连续测量水温、盐度和浊度浓度。还部署了若干海底海流计和波浪计。结果表明，台风期间海水温度会突然下降和上升，其结果温度比台风前低1度左右。文中还探讨了这种突变的主要原因以及生物礁内外对大气扰动热响应的差异。在正常的大气条件下，珊瑚礁中的电流的整体特性被发现是由潮汐，波浪和风的影响之间的动态平衡。还探讨了河口附近盐度和浑浊度的变化及其原因。热平衡分析表明，生物礁的热环境受大气条件和生物礁内外温差的共同影响。
To investigate the hydrodynamic and thermal environments of a fringing coral reef under possible influences from both inland and offshore, we have conducted a field survey at Shiraho reef on Ishigaki Island, Okinawa, Japan, by deploying 16 moored buoys inside and outside the reef, on which various sensors for continuous measurements of water temperature, salinity, and turbidity concentration were installed. Several bottom-mounted current meters and wave gauges were also deployed. The results show the abrupt decrease and increase of the water temperature during a typhoon, with the resultant temperature being about 1 degree lower than before. The main cause of this abrupt change and the difference between inside and outside the reef in the thermal response to the atmospheric agitation are investigated. For normal atmospheric conditions, the overall characteristics of currents in the coral reef are found to be governed by the dynamic balance among tide, waves, and wind effects. The salinity and turbidity variations near the river mouth and their cause are also investigated. Thermal environment in the reef is examined by a heat-budget analysis, indicating that it is influenced by both the atmospheric conditions and the temperature difference between inside and outside the reef.