Water renewal time for classification of atoll lagoons in the Tuamotu Archipelago (French Polynesia)
Water renewal time for classification of atoll lagoons in the Tuamotu Archipelago (French Polynesia)
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DOI：
10.1007/s00338-001-0190-9
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发表时间：
2001-12-01
期刊：
影响因子：
3.5
通讯作者：
Tartinville, B
中科院分区：
文献类型：
--
作者：
Andréfouët, S;Pagès, J;Tartinville, B
使用水动力更新时间的环礁泻湖分类的基础上的可行性进行测试的土阿莫土群岛，法属波利尼西亚的环礁。更新时间取决于海洋水通过环礁边缘的流入，在每天的时间尺度上，由于波浪的强迫。更新时间是根据有效波高（卫星测高数据）、形态测量指标（高分辨率卫星图像）和现场流量测量结果计算的，适用于一大批形态各异的环礁。更新时间相对于波高提出了各种环礁。更新时间从非常开放和浅的环礁不到一天，到半开放和中等深度的环礁几十天，到封闭或非常大和深的环礁几年不等。通过比较植物营养生物量（叶绿素总量在0.1至1 μ l（-1）范围内）和更新时间（0.1至130天），可以确定两组环礁。我们得到一个显着的生物量和更新时间之间的关系，但只有环礁泻湖表面积大于25公里（2）。
The feasibility of using hydrodynamic renewal time as the basis for a classification of atoll lagoons is tested for atolls of the Tuamotu Archipelago, French Polynesia. Renewal time depends on the inflow of oceanic water through the rim of the atoll, on a daily time scale, due to wave forcing. Renewal time is computed for a large set of morphologically diverse atolls, according to significant wave height (satellite altimetry data), morphometric indicators (high-resolution satellite images), and in-situ flow measurements. Renewal times with respect to wave height are presented for a variety of atolls. Renewal times range from less than 1 day for very open and shallow atolls, to several tens of days for semi-open moderately deep atolls, and to several years for closed or very large and deep atolls. Comparisons between phytoplanktonic biomass (in the range 0.1 to 1 mug l(-1) for total chlorophyll) and renewal time (0.1 to 130 days) leads to the identification of two groups of atolls. We obtain a significant relationship between biomass and renewal time, but only for atolls with lagoon surface areas greater than 25 km(2).