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Underwater Raman microscopy—a novel in situ tool for deep-sea microscale target studies

微尺度化学 遥控车辆 海床 遥控水下航行器 遥感 水下 深海 底栖区 海底扩张 原位 地质学 海洋学 计算机科学 人工智能 物理 机器人 数学教育 气象学 数学 移动机器人
作者
Qingsheng Liu,Jinjia Guo,Lu Yuan,Zihao Wei,Shuang Liu,Lulu Wu,Wangquan Ye,Ronger Zheng,Xilin Zhang
出处
期刊:Frontiers in Marine Science [Frontiers Media]
卷期号:9 被引量:7
标识
DOI:10.3389/fmars.2022.1018042
摘要

Microscale processes and interactions in the ocean are pervasive. They play a fundamental role in global biogeochemical cycles and have a significant impact on benthic marine ecosystems. However, our understanding of microscale processes and interactions that appeared in the benthic environment is still very limited, particularly for the deep ocean, due to a lack of appropriate in situ observation and detection methods. To address this challenge, we have developed an in situ observation and detection system for microscopic targets suitable for the deep sea and have successfully deployed the instrument on a remotely operated vehicle (ROV) to achieve in situ microscopic Raman detection of targets on the seabed over a depth of 770 m. This is a combined system that integrated microscopic imaging and Raman detection techniques for in situ observation and analysis of underwater microscale targets. The complete system consists of an electronics chamber, a detection probe, and a precision external positioning device. Power supply and real-time data transmission are achieved via ROV tethers. This allows researchers to operate the instrument in real time to perform microscopic imaging capture and Raman spectroscopy acquisition of interesting targets on the seafloor. The first sea trial of the system was conducted in the South China Sea in 2020, and during the cruise, microscopic image acquisition and in situ compositional analysis of shell fragments, seabed rock samples, and live sea stars were successively performed. The system has solved the key technical challenges of deep-sea microscopic imaging, demonstrated the feasibility of deep-sea microscopic imaging, and illustrated the great potential of combining Raman spectroscopy and microscopic imaging in marine research. In this paper, we present the unique design of the instrument and the deep-sea results. With further optimization, the system promises to be a versatile instrument providing a unique perspective for deep-sea geochemical and biochemical studies.
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