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Operational ocean observing system (OOOS) can meet the needs of marine disaster prevention and reduction, safeguard socio-economic development in coastal zones, and promote marine resource exploitation. As a solid foundation for the establishment of the OOOS, operational ocean observing equipment (OOOE) is attached great significance across the world. Three kinds of OOOEs in China are introduced and...
Considerable interests in recent years have been directed towards the study of various mechanical devices to draw up deep ocean water (DOW), particularly the air-lift artificial upwelling devices. However, one of the obstacles which limit their application in open ocean mariculture is the difficulty in estimating the flow rate in the upwelling pipe. Conventionally, the water flow rate in the upwelling...
Turbulence plays a crucial role in ocean dynamics and global biogeochemical cycles through redistributing heat, salt and nutrients across isodensity surfaces. Conventionally, most of microstructure measurements were conducted with vertical freefall profilers. In order to provide both a very high resolution vertical distribution of turbulent quantities and the long term series, a novel instrument MRVP...
Marine survey is one of the most important methods for oceanic research. During the marine survey process, some collected samples will be distributed in-situ to scientists. In order to effectively manage the sample data, corresponding relations of sample type should be established between the actual distributed sample records and the prior sample applications. This matching result can provide the...
The aim of this paper is to analyze the current international regulation of exploration and exploitation of gas and oil in the ocean in order to provide legal recommendations to preserve marine biodiversity and to prevent climate change in oceans. Offshore oil and gas exploration has been increasing worldwide in the last years and is taking place in deeper waters and extreme environments. Impacts...
Wind sea and swell indicating different wave field characteristics generally coexist in both coastal areas and open waters, which results in bimodal or multi-peaked features in directional wave spectrum. Separation and identification of mixed wave conditions into wind sea and swell present a more detailed description of the sea states, and they turn wave parameters such as significant weight height...
China has carried out five massive investigation and selection work on tidal energy and the latest survey results show that China's theoretical potentiality of the tidal energy within 10m depth contour offshore is estimated to be 192.86 GW. 171 potetial sites that have over 500 kW installed capacity add up to 22.83GW in total, with an annual energy output of 62.6 TWh. These potential sites of large...
This paper presents a method to localize underwater gliders in observation networks, and this method is also applicable to other vehicles. Utilizing the travel time of acoustic signals from near-surface acoustic sources, the dead-reckoning positions of underwater gliders can be refined. Specifically, compare two kinds of travel time, one is simulated by an acoustic model for a series of possible positions...
TRLs for marine renewable energy projects provide a valuable metric tool of technology readiness and deliver useful guidance for the development process. This paper discusses a brief overview of the current TRLs research and the importance of TRLs for the assessment of the techno-economic performance, assesses the state of the practice of other TRL users, and discusses the development of TRLs specific...
Coastal area plays various roles for human life as food supplier, recreation area, and biodiversity. Its roles are very important from the environmental, economic, and social aspects. However, most of the coastal area surrounded by big cities is landfilled for industrial use or as a final site our garbage goes to. It provides us economic growth, however, it causes serious problems such as eutrophication,...
Ocean acoustic tomography (OAT) is commonly used to infer the ocean environmental changes from acoustic measurements. Prior information of sound speed, if used judiciously in OAT inversion, can make a significant contribution to the accuracy improvement. In this paper, a sparsity-based OAT approach is proposed to invert sound speed with effective use of the prior information. By learning a compact...
Storm surge is one of the predominant natural threats to coastal communities. It occurs frequently and usually results in the most serious economic loss among all the natural hazards in China. The disaster induced by storm surge depends on various influencing factors such as the intensity, duration, and route of the passing typhoon, and thus a comprehensive understanding of natural coastal hazards...
This work presents an autonomous system for marine integrated physical-chemical and biological monitoring — the MarinEye system. It comprises a set of sensors providing diverse and relevant information for oceanic environment characterization and marine biology studies. It is constituted by a physical-chemical water properties sensor suite, a water filtration and sampling system for DNA collection,...
HF radar wave data are obtained through an iterative inversion procedure that provides an estimate of the directional spectrum, from which waveheight, period and direction parameters can be derived. The critical data quality requirements for the backscatter spectra, in order to generate reliable wave measurements, are the signal-to-noise levels in the second order regions along with a clear separation...
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