Article
Engineering, Marine
Inmaculada Ortigosa, Raul Bardaji, Albert Carbonell, Oriol Carrasco, Marcella Castells-Sanabra, Rafel Figuerola, Nina Hoareau, Jordi Mateu, Jaume Piera, Joan Puigdefabregas, Joaquin Salvador, Carine Simon, Ignasi Valles-Casanova, Josep L. Pelegri
Summary: This study presents a scientific approach using sailing boats for ocean monitoring, replacing expensive conventional oceanographic instruments. By installing low-cost sensors and instruments on sailing boats, water properties can be effectively measured, and the seasonal evolution of urban coastal waters can be explored.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Ziting Lin, Riqing Lv, Yong Zhao, Jian Zhao, Xuguang Hu, Ruijie Liu
Summary: In this article, a simple integrated interferometer with an open cavity is analyzed and verified for salinity and temperature measurement. The interferometer consists of a sensing probe and maintains high sensitivity in salinity measurement. It can also obtain simultaneous spectrums of two interferometers, solving the problem of cross-sensitivity. The proposed sensing probe has advantages in size, sensitivity, and multiparameter sensing.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Materials Science, Multidisciplinary
Zhenisbek Tagay, Fahad Mahmood, Anaelle Legros, Tarapada Sarkar, Richard L. Greene, N. P. Armitage
Summary: This study used time-domain terahertz spectroscopy to measure the low-energy electro-dynamic response of La2-xCexCuO4 thin films, revealing that the superconducting properties in these electron-doped cuprates can be well described in terms of a disordered BCS d-wave formalism consistent with dirty limit BCS-like d-wave superconductors.
Article
Marine & Freshwater Biology
Rodrigo Herico Rodrigues de Melo Soares, Felipe de Oliveira Fernandes, Ciro Anizio de Assuncao, Henrique D. S. Borburema, Marcella Araujo do Amaral Carneiro, Eliane Marinho-Soriano
Summary: This study investigated the spatial distribution of macroalgae in a saltwork and analyzed the environmental factors that influenced their distribution. The results showed that macroalgae distribution in the saltwork varies with changes in salinity, depth, and temperature. A total of 31 macroalgal taxa were recorded, with the highest number of species found in the sector closest to the sea. Increasing salinity, temperature, nitrite, and nitrate had negative effects on macroalgae occurrence, while pH and depth had positive effects on certain macroalgal species.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Optics
Yu Wang, Rui-jie Tong, Kai -jun Zhao, Bin Xing, Xiang Li, Sheng Hu, Yong Zhao
Summary: In this manuscript, a sensor for simultaneous measurement of seawater salinity and temperature based on surface Plasmon resonance (SPR) and Mach-Zehnder interference (MZI) is proposed. The sensor forms MZI by fusing multimode fiber at both ends of hollow core fiber, and SPR is formed by gold plating on one side of the hollow core fiber, and then MZI and SPR are coupled in a sensing structure. The experimental results show that the sensitivities of seawater temperature and salinity are -316.72 pm/℃ and 429.72 pm/parts per thousand, respectively. The proposed sensor overcomes the measurement error caused by the spatial position difference of cascade sensors and provides a new idea for double parameter detection. Moreover, the sensor has the advantages of small volume, simple fabrication and excellent performance.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Rui Huang, Qinghe Zhang, Wei Zhang, Guoliang Zou
Summary: A set of salinity measuring instrument and a set of fibre optic sediment concentration measuring instrument are designed and developed in the paper to study the mutual influences between synchronous measurement of salinity and sediment concentration. The experimental results show that the presence of sediment decreases the measured value of salinity, and the presence of salinity decreases the measured value of sediment concentration. The proposed method improves synchronous measurement accuracy of salinity and sediment concentration, which is significant for accurate measurement in estuarine coastal waters.
Article
Thermodynamics
S. Wilhelmy, A. Zimare, Q. Zhang, M. Rettenmayr, S. Lippmann
Summary: The method presents a rapid and accurate way to determine the Curie temperature T_C based on the variations in thermal conductivity and thermal diffusivity, by measuring temperature profiles of samples under a temperature gradient.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Electrical & Electronic
Yong Zhao, Jian Zhao, Yun Peng, Rui-Jie Tong, Lu Cai
Summary: This article proposes and demonstrates a simultaneous seawater salinity and temperature measurement sensor using a Fabry-Perot interferometer and Mach-Zehnder interferometer composite fiber-optic structure. The experimental results show that the sensor has good measurement performance and potential.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Electrical & Electronic
Renan C. Lazaro, Carlos Marques, Carlos E. S. Castellani, Arnaldo Leal-Junior
Summary: This paper presents the development of a thermal measurement system for density, specific heat capacity and thermal conductivity in fluids, using Fiber Bragg Gratings (FBGs) for sensor development. The diaphragm system and temperature sensor were employed to estimate density, specific heat and thermal conductivity, with successful implementation of a method to estimate specific heat and thermal conductivity using the heat equation. The proposed system allows for simultaneous measurements of density, specific heat and thermal conductivity with the same structure.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Hong-Kun Zheng, Yong Zhao, Ri-Qing Lv, Zi-Ting Lin, Xi-Xin Wang, Yi-Fan Zhou, Shi-Zhe Chen
Summary: A reflective optical fiber sensor composed of two Fabry Perot cavities is proposed for temperature and salinity measurement in this study. By applying frequency division multiplexing (FDM) technique and cavity length demodulation technology, the sensor can achieve salinity measurement in the full measurement range, with a sensitivity of better than 50 nm/parts per thousand for salinity and 6.85 nm/degrees C for temperature. The sensor shows promise for salinity measurement application due to its low cost, easy fabrication, and long sensing distance.
IEEE SENSORS JOURNAL
(2021)
Article
Thermodynamics
Inseok Yang, Daeho Kim
Summary: This study assessed the measurement uncertainty in thermal conductivity of insulation materials at high temperatures using a guarded hot plate apparatus. By employing calibrated thermocouples and proper auxiliary set temperatures, the effect of stray heat flow on the measurements was reduced.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Chemistry, Analytical
Shiyu Xiao, Mingliang Zhang, Changhua Liu, Chongwen Jiang, Xiaodong Wang, Fuhua Yang
Summary: Over 70% of the earth's surface is covered by oceans, which provide a significant source of wealth for humans. CTD sensors, including those based on electrics, optics, acoustics, and radio waves, have been developed for the study and utilization of oceans. The latest progress and potential development directions of CTD sensors for ocean investigation are discussed, including principles, structures, materials, properties, and commercial availability.
Article
Engineering, Multidisciplinary
Yipeng Liao, Kaiming Yang, Xin Shi
Summary: In this paper, dual fiber interferometers combined with a novel nonlinear decoupling algorithm are studied for simultaneous measurement of seawater temperature and salinity. The correlation analysis shows that there is a quadratic relationship between the position of interference dips and temperature, as well as interaction between temperature and salinity. A quadratic polynomial surface-based nonlinear decoupling algorithm is developed, and its deviation is smaller than that of the commonly used linear decoupling algorithm. This work may provide useful reference for developing practical optical fiber seawater temperature and salinity sensors and establishing decoupling algorithms for other dual-parameter fiber-optic sensors.
Article
Physics, Applied
Sorren Warkander, Junqiao Wu
Summary: This study explores the dominant techniques in laser-based thermal measurement and presents a method for measuring semiconductor samples without the need for a metal transducer. The feasibility and accuracy of this method are demonstrated through experimental data.
JOURNAL OF APPLIED PHYSICS
(2022)
Review
Chemistry, Analytical
Honglin Liang, Jing Wang, Lihui Zhang, Jichao Liu, Shanshan Wang
Summary: This paper reviews the most recently developed sensors for single parameter and multi-parameter TSP sensing and measurement based on different optical fiber sensors (OFSs). It also addresses the encapsulation methods to protect the fibers and maintain the normal operation of OFSs in seawater, as well as the response time of the OFS. Finally, the prospects and challenges of using OFSs in marine environments are discussed, along with providing some clues for future work.
Article
Oceanography
Eitarou Oka, Shota Katsura, Hiroyuki Inoue, Atsushi Kojima, Moeko Kitamoto, Toshiya Nakano, Toshio Suga
JOURNAL OF OCEANOGRAPHY
(2017)
Article
Environmental Sciences
Shusaku Sugimoto, Kimio Hanawa, Tomowo Watanabe, Toshio Suga, Shang-Ping Xie
NATURE CLIMATE CHANGE
(2017)
Review
Oceanography
Eitarou Oka, Masao Ishii, Toshiya Nakano, Toshio Suga, Shinya Kouketsu, Masatoshi Miyamoto, Hideyuki Nakano, Bo Qiu, Shusaku Sugimoto, Yusuke Takatani
JOURNAL OF OCEANOGRAPHY
(2018)
Article
Meteorology & Atmospheric Sciences
Ryohei Yamaguchi, Toshio Suga, Kelvin J. Richards, Bo Qiu
Article
Oceanography
Ryohei Yamaguchi, Toshio Suga
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2019)
Article
Oceanography
Yoshimi Kawai, Shigeki Hosoda, Kazuyuki Uehara, Toshio Suga
Summary: This study evaluated the heat and salinity transport between the mixed layer and the permanent pycnocline by calculating obduction and subduction rates with Argo dataset. The results show that the entrained permanent pycnocline water impacts the ML temperature and salinity, especially in specific regions like the Circumpolar Current and tropical oceans. Additionally, changes in obduction and subduction related to a marine heatwave in the northeastern North Pacific around 2014 were examined.
JOURNAL OF OCEANOGRAPHY
(2021)
Article
Meteorology & Atmospheric Sciences
Mizuki Iida, Shusaku Sugimoto, Toshio Suga
JOURNAL OF CLIMATE
(2020)
Article
Environmental Sciences
Annie P. S. Wong, Susan E. Wijffels, Stephen C. Riser, Sylvie Pouliquen, Shigeki Hosoda, Dean Roemmich, John Gilson, Gregory C. Johnson, Kim Martini, David J. Murphy, Megan Scanderbeg, T. V. S. Udaya Bhaskar, Justin J. H. Buck, Frederic Merceur, Thierry Carval, Guillaume Maze, Cecile Cabanes, Xavier Andre, Noe Poffa, Igor Yashayaev, Paul M. Barker, Stephanie Guinehut, Mathieu Belbeoch, Mark Ignaszewski, Molly O'Neil Baringer, Claudia Schmid, John M. Lyman, Kristene E. McTaggart, Sarah G. Purkey, Nathalie Zilberman, Matthew B. Alkire, Dana Swift, W. Brechner Owens, Steven R. Jayne, Cora Hersh, Pelle Robbins, Deb West-Mack, Frank Bahr, Sachiko Yoshida, Philip J. H. Sutton, Romain Cancouet, Christine Coatanoan, Delphine Dobbler, Andrea Garcia Juan, Jerome Gourrion, Nicolas Kolodziejczyk, Vincent Bernard, Bernard Bourles, Herve Claustre, Fabrizio D'Ortenzio, Serge Le Reste, Pierre-Yve Le Traon, Jean-Philippe Rannou, Carole Saout-Grit, Sabrina Speich, Virginie Thierry, Nathalie Verbrugge, Ingrid M. Angel-Benavides, Birgit Klein, Giulio Notarstefano, Pierre-Marie Poulain, Pedro Velez-Belchi, Toshio Suga, Kentaro Ando, Naoto Iwasaska, Taiyo Kobayashi, Shuhei Masuda, Eitarou Oka, Kanako Sato, Tomoaki Nakamura, Katsunari Sato, Yasushi Takatsuki, Takashi Yoshida, Rebecca Cowley, Jenny L. Lovell, Peter R. Oke, Esmee M. van Wijk, Fiona Carse, Matthew Donnelly, W. John Gould, Katie Gowers, Brian A. King, Stephen G. Loch, Mary Mowat, Jon Turton, E. Pattabhi Rama Rao, M. Ravichandran, Howard J. Freeland, Isabelle Gaboury, Denis Gilbert, Blair J. W. Greenan, Mathieu Ouellet, Tetjana Ross, Anh Tran, Mingmei Dong, Zenghong Liu, Jianping Xu, KiRyong Kang, HyeongJun Jo, Sung-Dae Kim, Hyuk-Min Park
FRONTIERS IN MARINE SCIENCE
(2020)
Review
Geochemistry & Geophysics
Gregory C. Johnson, Shigeki Hosoda, Steven R. Jayne, Peter R. Oke, Stephen C. Riser, Dean Roemmich, Tohsio Suga, Virginie Thierry, Susan E. Wijffels, Jianping Xu
Summary: Argo, an international network of nearly 4,000 autonomous robotic profiling floats, has revolutionized physical oceanography. After two decades, Argo data have supported thousands of scientific publications and improved real-time forecasts and projections.
ANNUAL REVIEW OF MARINE SCIENCE
(2022)
Article
Oceanography
Daiki Ito, Toshio Suga, Shinya Kouketsu, Eitarou Oka, Yoshimi Kawai
Summary: The study conducted five high-resolution hydrographic sections at the periphery of an anticyclonic mesoscale eddy north of the Kuroshio Extension to explore the evolution of submesoscale structure associated with mesoscale eddies. The results showed that submesoscale filaments, composed of cold and fresh water originating from the subarctic region, contribute to rapid water mass transport and effective mixing, influenced by strain fields, convergence, geostrophic forcing, and vertical shear of horizontal velocity. These findings suggest the important role of submesoscale filaments in water mass transport and transformation around mesoscale eddies in the Kuroshio Extension region.
JOURNAL OF OCEANOGRAPHY
(2021)
Editorial Material
Oceanography
Dean Roemmich, Lynne Talley, Nathalie Zilberman, Emily Osborne, Kenneth Johnson, Leticia Barbero, Henry Bittig, Nathan Briggs, Andrea Fassbender, Gregory Johnson, Brian King, Elaine McDonagh, Sarah Purkey, Stephen Riser, Toshio Suga, Yui Takeshita, Virginie Thierry, Susan Wijffels
Article
Oceanography
Fumika Sambe, Toshio Suga
Summary: In the mid-latitude northwest Pacific Ocean, the meeting and mixing of subtropical and subarctic waters give rise to unique oceanographic structures. This study uses unsupervised clustering to analyze temperature and salinity profiles from Argo float in this region and compares the results to previous knowledge. The findings show that this method can accurately capture the distribution and features of different oceanographic structures, with the relative abundance of each structure quantified on a grid. Additionally, it is discovered that the flow path of the Kuroshio Extension affects the distribution of some structures.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Engineering, Ocean
W. Brechner Owens, Nathalie Zilberman, Ken S. Johnson, Herve Claustre, Megan Scanderbeg, Susan Wijffels, Toshio Suga
Summary: OneArgo is an expansion of the Argo program that aims to provide comprehensive global ocean data by extending the coverage and measurements of physical and biogeochemical variables. Large-scale regional pilots are currently being conducted to refine the technology and infrastructure necessary for collecting research-quality data for a fully global OneArgo.
MARINE TECHNOLOGY SOCIETY JOURNAL
(2022)
Review
Environmental Sciences
Dean Roemmich, Matthew H. Alford, Herve Claustre, Kenneth Johnson, Brian King, James Moum, Peter Oke, W. Brechner Owens, Sylvie Pouliquen, Sarah Purkey, Megan Scanderbeg, Toshio Suga, Susan Wijffels, Nathalie Zilberman, Dorothee Bakker, Molly Baringer, Mathieu Belbeoch, Henry C. Bittig, Emmanuel Boss, Paulo Calil, Fiona Carse, Thierry Carval, Fei Chai, Diarmuid O. Conchubhair, Fabrizio d'Ortenzio, Giorgio Dall'Olmo, Damien Desbruyeres, Katja Fennel, Ilker Fer, Raffaele Ferrari, Gael Forget, Howard Freeland, Tetsuichi Fujiki, Marion Gehlen, Blair Greenan, Robert Hallberg, Toshiyuki Hibiya, Shigeki Hosoda, Steven Jayne, Markus Jochum, Gregory C. Johnson, KiRyong Kang, Nicolas Kolodziejczyk, Arne Kortzinger, Pierre-Yves Le Traon, Yueng-Djern Lenn, Guillaume Maze, Kjell Arne Mork, Tamaryn Morris, Takeyoshi Nagai, Jonathan Nash, Alberto Naveira Garabato, Are Olsen, Rama Rao Pattabhi, Satya Prakash, Stephen Riser, Catherine Schmechtig, Claudia Schmid, Emily Shroyer, Andreas Sterl, Philip Sutton, Lynne Talley, Toste Tanhua, Virginie Thierry, Sandy Thomalla, John Toole, Ariel Troisi, Thomas W. Trull, Jon Turton, Pedro Joaquin Velez-Belchi, Waldemar Walczowski, Haili Wang, Rik Wanninkhof, Amy F. Waterhouse, Stephanie Waterman, Andrew Watson, Cara Wilson, Annie P. S. Wong, Jianping Xu, Ichiro Yasuda
FRONTIERS IN MARINE SCIENCE
(2019)
Article
Environmental Sciences
Takamasa Tsubouchi, Toshio Suga, Kimio Hanawa
FRONTIERS IN MARINE SCIENCE
(2016)
