Use of the Underwater Video Profiler for the study of aggregate dynamics in the North Mediterranean
Use of the Underwater Video Profiler for the study of aggregate dynamics in the North Mediterranean
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DOI：
10.1006/ecss.1999.0539
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发表时间：
2000-01-01
影响因子：
2.8
通讯作者：
Stemmann, L
中科院分区：
文献类型：
--
作者：
Gorsky, G;Picheral, M;Stemmann, L
水下视频剖面仪是一种垂直部署的测量系统，设计用于量化0-1000米水柱中大于280微米的颗粒和大型浮游动物。由未受干扰的目标物体反射的光形成暗场图像，其以25 Hz频率记录。记录的图像被自动数字化和分析。结果表示为丰度或粒度分布，它们可以转换为体积或质量单位。该系统可配置为多仪器阵列，并可同时采集生物和物理数据。从1994年5月至1995年4月，每月调查进行了整个锋面结构与北利古里亚地转流。1995年冬、春两季的锋面和粒子的离岸扩散极限都位于海岸附近。相反，在1994年秋季，它的位置是公海，陆地物质分散在远离海岸的地方。沿着大陆坡连续存在中间云状层，这表明不同的过程可能提供颗粒物质并将其输送到更深层，从那里颗粒物质可扩散到海盆。(C)北京大学出版社.
The Underwater Video Profiler is a vertically deployed survey system designed for the quantification of particles >280 mu m and of large zooplankton in the 0-1000 m water column. Light reflected by undisturbed target objects forms a dark-field image, which is recorded at 25 Hz frequency. The recorded images are automatically digitized and analysed. The results are expressed as abundance or size distributions and they can be converted to volume or mass units. The system can be configured as a multi-instrument array and can simultaneously acquire biological and physical data. From May 1994 to April 1995 a monthly survey was performed across a frontal structure associated to the North Ligurian geostrophic current. In winter and spring 1995 the front, as well as the offshore dispersion limit of particles, were located near to the coast. In contrast, during autumn 1994, its position was open sea and the terrestrial matter was dispersed far from the coast. The continuous presence of intermediate nepheloid layers along the continental slope indicates that different processes may supply and transport the particulate matter to deeper layers, from where it can be diffused into the basin. (C) 2000 Academic Press.