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Microseismic observations reveal that internal waves intensify seabed methane release

Science China Earth Sciences 2024年第10期67卷 3186-3203页

作者： Zhaoyang TIAN yonggang jia Junjiang ZHU Tian CHEN Hui WANG Chunsheng JI Chengyu LIU Longyu LU Manchao HE Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of ChinaQingdao 266100China Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Lab of Submarine Geosciences and Prospecting TechniquesMOE and College of Marine GeosciencesOcean University of ChinaQingdao 266100China Guangzhou Marine Geological Survey China Geological SurveyGuangzhou 511458China Shandong Earthquake Agency Jinan 250014China State Key Laboratory for Tunnel Engineering China University of Mining and Technology(Beijing)Beijing 100083China

Internal waves transport material and energy from the upper water column to the deep ocean, disturbing seabed sediments and resulting in phenomena such as seabed erosion and changes in topography. On the northern slope of the South China Sea and in many coastal margins worldwide, the zones with internal wave action closely overlap with areas where natural gas hydrates are present. However, due to significant differences in the spatial and temporal scales, understanding the influence of internal waves on methane releases from deep seabeds is challenging. In this study, in situ observations of seabed microseismicity and internal waves are conducted at water depths of 655 meters and 1450 meters in the Pearl River Canyon of the South China Sea. The microseismicity caused by internal waves and seabed methane releases is identified, and a method to establish the correlation between internal waves and seabed methane releases through the use of microseismic recordings is proposed, aiming to obtain direct observational evidence of internal waves intensifying seabed methane releases. The results show that internal waves and seabed methane releases generate significant microseismic signals, indicating the continuous influence of internal waves on the deep seabed of the northern slope of the South China Sea and revealing active methane release phenomena on the seabed. At both long and short time scales, internal waves increase the frequency of seabed methane releases by 4.2 times and 2.4 times, respectively, while also enhancing the intensity of these releases. These changes are influenced by the alterations in seabed flow velocity, pressure, and temperature that are induced by internal wave activities. This study emphasizes that microseismic signals are effective carriers of information for multiscale geological processes on seabeds and suggests that internal waves exacerbate marine geological hazards and contribute to global climate change by intensifying seabed methane relea

关键词： Internal waves Seabed methane release Microseismic observation Ocean bottom seismometer Northern slope of the South China Sea

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多分量力的测试与校准技术

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今日自动化 2024年第3期 128-130页

作者：贾永刚辽宁省计量科学研究院辽宁沈阳110004

文章介绍了多分量力的测试与校准技术研究现状,重点分析了二分量力传感器、三分量力传感器和六分量力传感器的基本原理和结构特点。阐述了当下多分量力测量仪器的校准工作中参考的标准方法,并说明了多分量力校准仪器的基本原理和结构特... 详细信息

文章介绍了多分量力的测试与校准技术研究现状,重点分析了二分量力传感器、三分量力传感器和六分量力传感器的基本原理和结构特点。阐述了当下多分量力测量仪器的校准工作中参考的标准方法,并说明了多分量力校准仪器的基本原理和结构特点。最后介绍了挠性连接件的结构功能特点,指出其在校准装置中的应用和作用机理,旨在为工程技术人员提供一种详细、全面、可靠的多分量力测试与校准解决方案。

关键词：多分量力二分量力传感器三分量力传感器六分量力传感器校准装置挠性连接件

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天然海水环境下离子浓度对MICP反应的影响

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土木与环境工程学报（中英文） 2024年第5期46卷 47-56页

作者：滕秀英王子玉贾永刚陈文婧中国海洋大学三亚海洋研究院海南三亚572000 海南热带海洋学院海洋科学技术学院海南三亚572022 海南热带海洋学院生态环境学院海南三亚572022 海南热带海洋学院崖州湾创新研究院海南三亚572025 中国海洋大学山东省海洋环境地质工程重点实验室山东青岛266100

微生物岩土技术通过生物矿化过程改善基础材料的力学性质,使其更适用于建筑或解决多学科领域的环境问题。微生物矿化过程中产生的碳酸钙是改善基础材料力学性质的主要成分,但其生成量及形态等受多种因素的影响。通过离子计、pH计、SEM、... 详细信息

微生物岩土技术通过生物矿化过程改善基础材料的力学性质,使其更适用于建筑或解决多学科领域的环境问题。微生物矿化过程中产生的碳酸钙是改善基础材料力学性质的主要成分,但其生成量及形态等受多种因素的影响。通过离子计、pH计、SEM、EDS和XRD等手段探究天然海水和去离子水环境在矿化过程中氯化钙和尿素浓度、比例及菌液和胶结液(氯化钙、尿素)体积比等因素对沉淀物质形貌及晶体组成的影响。结果表明:钙离子和尿素浓度及比例低时,碳酸钙的产率较高,但当初始钙离子、尿素浓度超过1.0 mol/L时,离子浓度增大对细菌产脲酶有抑制作用,浓度越高对脲酶的抑制作用越明显,沉淀物产率也随之减小,海水环境总体沉淀量与沉淀效率均高于去离子水环境。菌胶结液体积比去离子水中为1∶4、海水中不高于1∶10时,碳酸钙生成量较高,去离子水环境晶型以方解石为主,海水环境晶型以球霰石为主且沉淀中含有镁盐。

关键词：微生物诱导碳酸钙沉淀水环境离子浓度碳酸钙沉淀效率

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铁路运输技术规章问题闭环管理流程研究

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铁道技术监督 2024年第5期52卷 9-14页

作者：陈琦晁阳贾永刚中国铁道科学研究院集团有限公司运输及经济研究所北京100081

分析铁路局集团公司运输技术规章问题的反馈机制和有效的管理流程,能够提高铁路运输技术规章的制修订质量和实施效果。在调研其他行业问题反馈机制现状的基础上,总结相关经验。分析闭环管理模式在铁路运输技术规章问题管理流程中的应用... 详细信息

分析铁路局集团公司运输技术规章问题的反馈机制和有效的管理流程,能够提高铁路运输技术规章的制修订质量和实施效果。在调研其他行业问题反馈机制现状的基础上,总结相关经验。分析闭环管理模式在铁路运输技术规章问题管理流程中的应用及其关键要素,构建出包含4个层级的铁路运输技术规章问题管理流程。

关键词：铁路运输技术规章闭环管理问题管理流程

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The profile of sound speed and dissolved oxygen in the polymetallic nodules depositional area in the Western Pacific

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Journal of Oceanology and Limnology 2023年第6期41卷 2090-2100页

作者： Bowen LI yonggang jia Zhihan FAN Kai LI College of Oceanography and Space Information China University of PetroleumQingdao 266580China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of ChinaQingdao 266100China

With the consumption of terrestrial metal resources,the exploitation of deep-sea polymetallic nodule minerals has been widely concerned around the ***,the environmental impact of deep-sea polymetallic nodule mining cannot be ***,duo to the lacks in stable and safe deep-sea(the depth>1000 m)vertical profile observation systems and consequently in long-term in-situ observation data,the sound speed and dissolved oxygen and the other water environment factors in the deposition areas of polymetallic nodules remains poorly *** this study,a deep-sea in-situ observation system was designed and deployed,and the water environment data of the polymetallic nodule deposition area were collected and *** shows that the dissolved oxygen in the depth of 0–600 m was mainly affected by biological factors,while that in the area deeper than 600 m was affected by physical *** sound speed in the water body was mainly affected by temperature and *** depths below 840 m,the sound speed is mainly controlled by temperature,and at depths between 840 m and 5700 m,the sound speed is mainly controlled by *** correlations of sound speed *** and *** were regressed into *** resuspension of sediments rich in various metals may result in the reduction of dissolved oxygen and the improvement of redox *** environmental impact caused by a single sediment resuspension could last for 24 h or *** findings enrich the understanding of the background value of the water environment in the polymetallic nodule deposition area.

关键词： deep sea dissolved oxygen redox potential sound speed conductivity

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Marine Geohazards： Review and Future Perspective

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Acta Geologica Sinica(English Edition) 2016年第4期90卷 1455-1470页

作者： jia yonggang ZHU Chaoqi LIU Liping WANG Dong Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (Ocean University of China) Qingdao Shandong 266100 China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology Qingdao Shandong 266061 China Key Laboratory of Marine Environment and Ecology Ministry of Education Ocean University of China Qingdao Shandong 266100 China

With offshore resource exploration moving to the deep water, marine geohazards have been attracting attention from the academic and industry. Research achievements of marine geohazards were reviewed in this paper. We analyzed and discussed typical issues among marine geohazards, including coastal erosion, submarine slope failure, turbidity current and special hazards induced by gas hydrate dissociation, in terms of their definition, distribution, characteristics and case studies. Major international projects on marine geohazards headed by the United States, Europe, Japan and other international organizations are introduced as well. Three marine geohazard survey methods, including geophysical survey, geotechnical exploration and in-situ observation, were summarized with a brief description of each approach, respectively. Especially, the history of marine geohazard researches in China is briefly reviewed, showing the disparity between China and developed countries in the study of marine geohazards narrows gradually. The potential research tendency in future was suggested.

关键词： marine geohazards submarine landslide gas hydrate coastal erosion in-situ observation

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In-situ Observations of Engineering Geological Environment during Hydrate Production Tests in Deepwater

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Acta Geologica Sinica(English Edition) 2017年第S1期91卷 193-194页

作者： ZHU Chaoqi jia yonggang Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (Ocean University of China) Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology

Gas hydrates are ice-like combinations of methane and *** global inventory of gas hydrates appears to be very *** estimates of the total amount of methane contained in the world’s gas hydrates range

关键词： estimates contained inventory methane hydrate mankind recovered fossil resistivity Siberia

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Wave flume experiments on dynamics of the bottom boundary layer in silty seabed

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Acta Oceanologica Sinica 2020年第5期39卷 96-104页

作者： Mingzheng Wen yonggang jia Zhenhao Wang Shaotong Zhang Hongxian Shan Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of ChinaQingdao 266100China Tianjin Center China Geological SurveyTianjin 300170China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266061China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China

The objectives of this study are carried out a series of controlled large wave flume experiments using fine-grained sediment from the Huanghe River Delta,exploring the complete sequence of sediment behavior in the bottom boundary layer(BBL)during wave-induced *** results show that:(1)The BBL in silty seabed is exposed to a progressive wave,goes through a number of different stages including compaction before liquefaction,sediment liquefaction,and compaction after liquefaction,which determines the range and thickness of BBL.(2)With the introduction of waves,first,the sediment surface has settled by an amount S(S=1–2 cm)in the course of wave loadings with an insufficient accumulation of pore water *** a thin high concentration layer formed the near-bed bottom.(3)Once the liquefaction sets in,the liquefied sediment with an‘orbital motion’and the sub-liquefied sediment form a two-layer-sediment *** range of BBL extends downwards and stopped at a certain depth,subsequently,develops upwards with the compaction ***,resuspended sediments diffuse to the upper water column.(4)During the dynamics process of the BBL beneath progressive waves,the re-suspended sediment increment ranked as sediment liquefaction>erosion before liquefaction>compaction after liquefaction.

关键词： bottom boundary layer suspended sediment concentration liquefaction compaction Yellow River Delta

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Submarine Trenches and Wave-Wave Interactions Enhance the Sediment Resuspension Induced by Internal Solitary Waves

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Journal of Ocean University of China 2023年第4期22卷 983-992页

作者： TIAN Zhuangcai LIU Chao jia yonggang SONG Lei ZHANG Mingwei State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering Ocean University of ChinaQingdao 266100China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China Key Laboratory of Coastal Science and Integrated Management Ministry of Natural ResourcesQingdao266061China

Internal solitary waves(ISWs)are nonlinear fluctuations in nature that could cause significant interactions between seawater and the *** have been proven to be an adequate cause of sediment resuspension in shallow and deep-sea *** the South China Sea,ISWs have the largest amplitude globally and directly interact with the seabed near the Dongsha slope in the northern South China *** analyzed the water profile and high-resolution multibeam bathymetric data near the Dongsha slope and revealed that submarine trenches have a significant impact on the sediment resuspension by ***,ISWs in the zone of the wave-wave interaction enhanced sediment mixing and *** concentration of the suspended particulate matter inside submarine trenches was significantly higher than that outside *** concentration of the suspended particulate matter near the bottoms of trenches could be double that outside them and formed a vast bottom nepheloid *** could increase the concentration of the suspended particulate matter in the entire water column,and a water column with a high concentration of the suspended particulate matter was formed above the *** in the wave-wave interaction zone near Dongsha could induce twice the concentration of the bottom nepheloid layer than those in other *** sediment resuspension caused by ISWs is a widespread occurrence all around the *** findings of this study can offer new insights into the influence of submarine trench and wave-wave interaction on sediment resuspension and help in geohazard assessment.

关键词： sediment resuspension internal solitary waves trench wave-wave interaction

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Tidal flat erosion of the Huanghe River Delta due to local changes in hydrodynamic conditions

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Acta Oceanologica Sinica 2014年第7期33卷 116-124页

作者： jia yonggang ZHENG Jiewen YUE Zhongqi LIU Xiaolei SHAN Hongxian Key Laboratory of Marine Environment and Ecology Ministry of Education Ocean University of China First Institute of Oceanology State Oceanic Administration Key Laboratory of State Oceanic Administration for Marine Sedimentology and Environmental Geology First Institute of Oceanography State Oceanic Administration Department of Civil Engineering University of Hong Kong

An ideal nature system for the study of post-depositional submarine mass changing under wave loading was selected in the intertidal platform of the subaqueous Huanghe River Delta, a delta formed during period from 1964 to 1976 as the Huanghe River discharged into the Bohai Gulf by Diaokou distributary. A road embankment constructed for petroleum recovery on the inter-tidal platform in 1995 induced the essential varieties of hydrodynamic conditions on the both sides of the road. With both sides sharing similarities in （1） initial sedimentary environment, （2） energetic wave loading, （3） differential hydrodynamic conditions in later stages, （4） enough long-range action, and （5） extreme shallow water inter-tidal platforms; the study is representative and feasible as well. Two study sites were selected on each side of the road, and a series of measurements, samplings, laboratory experiments have been carried out, including morphometry, hydrodynamic conditions, sediment properties, granularity composition, and fractal dimension calculation of the topography in the two adjacent areas. It was observed that in the outer zone, where wave loading with high magnitude prevailed, the tidal flat was bumpy and exhibited a high erosion rate and high fractal dimension. Further, the fractal dimension diminished quickly, keeping with the enlarging of calculative square size. However in the inner zone, where the hydrodynamic condition was weak, the tidal fiat was fiat and exhibited a low erosion rate and low fractal dimensions; the fractal dimension diminished with the enlarging of calcu- lative square size. The fractal dimensions in the different hydrodynamic areas equalized increasingly as the calculative square size accreted to threshold, indicating that the hydrodynamic condition plays a significant role in topography construction and submarine delta erosion process. Additionally, the later differentiation of sediment properties, granularity composition, microstructure characteristi

关键词： hydrodynamic conditions coastal erosion sea-bed topography in-situ measurement fractal calculation

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