Development of Marinesnow Analyzing System by using Digital Camera

数码相机Marinesnow分析系统的开发

• 批准号: 11558065
• 负责人: KOIKE Isao
• 金额: $ 5.38万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11558065/
• 关键词: marine snow; large sinking particles; digital camera; white LED light source; deep sea; food webs; cycling of bioelements; 有機アグリゲート; 沈降粒子; LCDランプ; 外洋; 大型沈降粒子; 白色LED

Marine snow is defined as visible marine aggregates (size range more than 0.5mm in diameter) and has been recognized as an important role in the transfer of organic carbon in the upper ocean into deep sea basin through aggregating numerous small organic debris into large size enough for sinking. At the same time, marine snow supplies organic materials to deep-sea organisms as a basis of the food webs. There have been many attempts to apply video-camera or steal-camera for the study of marine snow in various institutions. Those attempts, however, have been hampered by tedious treatment of obtained huge data of pictures. In this study, by taking the advantage of recent advancement of digital camera and other technologies, we developed compact marine snow camera system, which can use down to 6000m depth. The system is composed of light source, digital camera, and data processing portion and all together are assembled into compact flame together with a buttery case. For the light source, we tried to apply white LED light source at the first time deep sea instruments, since buttery consumption of the LED light source is far less than conventional strobe-light. By compiling more than 1000 of single light sources into a flat panel, enough amount of light intensity for photograph of marine snow was obtained. The light panel was arranged to be 90 degree for the camera to get parallel light source. The instrument can accommodate some 250 pictures at the one trip, which is enough to picture 1-5m interval depths at the major thermocline depth (200-800m layers). This system uses the wire-winch on board of research vessel, and collected the data in the memory within the system. After recovery the system on board, the picture data is transferred into data processing system within 30 minutes. In future, real time transfer of data from the system through an armored cable during deploy of the system is possible.

海雪被定义为可见的海洋聚集体（尺寸范围直径超过0.5毫米），并被认为通过将大量小型有机碎片聚集成足以下沉的大尺寸，在上层海洋中的有机碳转移到深海盆地中发挥着重要作用。与此同时，海洋雪为深海生物提供有机物质，作为食物网的基础。各个机构已经多次尝试应用摄像机或偷拍相机来研究海洋雪。然而，这些尝试因对获得的大量图片数据进行繁琐的处理而受到阻碍。在这项研究中，利用数码相机和其他技术的最新进展，我们开发了紧凑型海洋雪地摄像机系统，可使用深度达6000米。该系统由光源、数码相机和数据处理部分组成，并与黄油盒一起组装成紧凑型火焰。光源方面，我们在深海仪器上首次尝试采用白色LED光源，因为LED光源的电池消耗远低于传统的频闪灯。通过将 1000 多个单一光源编译成平板，获得了足够的光强度来拍摄海雪。灯板布置成90度，以便相机获得平行光源。该仪器一次可容纳约250张图片，足以在主要温跃层深度（200-800m层）拍摄1-5m间隔的深度。该系统使用科考船上的绞盘，并将数据采集到系统内存中。船上系统恢复后，图像数据在30分钟内传输至数据处理系统。将来，在系统部署期间通过铠装电缆实时传输系统数据是可能的。