Thermocline

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A thermocline (sometimes metalimnion) is a thin but distinct layer in a large body of fluid (e.g. water, such as an ocean or lake, or air, such as an atmosphere), in which temperature changes more rapidly with depth than it does in the layers above or below. (Wikipedia.org)






Conferences related to Thermocline

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Oceans 2020 MTS/IEEE GULF COAST

To promote awareness, understanding, advancement and application of ocean engineering and marine technology. This includes all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water. This includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources.

  • OCEANS 2018 MTS/IEEE Charleston

    Ocean, coastal, and atmospheric science and technology advances and applications

  • OCEANS 2017 - Anchorage

    Papers on ocean technology, exhibits from ocean equipment and service suppliers, student posters and student poster competition, tutorials on ocean technology, workshops and town meetings on policy and governmental process.

  • OCEANS 2016

    The Marine Technology Scociety and the Oceanic Engineering Society of the IEEE cosponor a joint annual conference and exposition on ocean science, engineering, and policy. The OCEANS conference covers four days. One day for tutorials and three for approx. 500 technical papers and 150 -200 exhibits.

  • OCEANS 2015

    The Marine Technology Scociety and the Oceanic Engineering Society of the IEEE cosponor a joint annual conference and exposition on ocean science, engineering, and policy. The OCEANS conference covers four days. One day for tutorials and three for approx. 450 technical papers and 150-200 exhibits.

  • OCEANS 2014

    The OCEANS conference covers four days. One day for tutorials and three for approx. 450 technical papers and 150-200 exhibits.

  • OCEANS 2013

    Three days of 8-10 tracks of technical sessions (400-450 papers) and concurent exhibition (150-250 exhibitors)

  • OCEANS 2012

    Ocean related technology. Tutorials and three days of technical sessions and exhibits. 8-12 parallel technical tracks.

  • OCEANS 2011

    The Marine Technology Society and the Oceanic Engineering Scociety of the IEEE cosponsor a joint annual conference and exposition on ocean science engineering, and policy.

  • OCEANS 2010

    The Marine Technology Society and the Oceanic Engineering Scociety of the IEEE cosponsor a joint annual conference and exposition on ocean science engineering, and policy.

  • OCEANS 2009

  • OCEANS 2008

    The Marine Technology Society (MTS) and the Oceanic Engineering Society (OES) of the Institute of Electrical and Electronic Engineers (IEEE) cosponsor a joint conference and exposition on ocean science, engineering, education, and policy. Held annually in the fall, it has become a focal point for the ocean and marine community to meet, learn, and exhibit products and services. The conference includes technical sessions, workshops, student poster sessions, job fairs, tutorials and a large exhibit.

  • OCEANS 2007

  • OCEANS 2006

  • OCEANS 2005

  • OCEANS 2004

  • OCEANS 2003

  • OCEANS 2002

  • OCEANS 2001

  • OCEANS 2000

  • OCEANS '99

  • OCEANS '98

  • OCEANS '97

  • OCEANS '96


2019 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)

International Geosicence and Remote Sensing Symposium (IGARSS) is the annual conference sponsored by the IEEE Geoscience and Remote Sensing Society (IEEE GRSS), which is also the flagship event of the society. The topics of IGARSS cover a wide variety of the research on the theory, techniques, and applications of remote sensing in geoscience, which includes: the fundamentals of the interactions electromagnetic waves with environment and target to be observed; the techniques and implementation of remote sensing for imaging and sounding; the analysis, processing and information technology of remote sensing data; the applications of remote sensing in different aspects of earth science; the missions and projects of earth observation satellites and airborne and ground based campaigns. The theme of IGARSS 2019 is “Enviroment and Disasters”, and some emphases will be given on related special topics.


OCEANS 2019 - Marseille

Research, Development, and Operations pertaining to the Oceans

  • OCEANS 2020 - SINGAPORE

    An OCEANS conference is a major forum for scientists, engineers, and end-users throughout the world to present and discuss the latest research results, ideas, developments, and applications in all areas of oceanic science and engineering. Each conference has a specific theme chosen by the conference technical program committee. All papers presented at the conference are subsequently archived in the IEEE Xplore online database. The OCEANS conference comprises a scientific program with oral and poster presentations, and a state of the art exhibition in the field of ocean engineering and marine technology. In addition, each conference can have tutorials, workshops, panel discussions, technical tours, awards ceremonies, receptions, and other professional and social activities.

  • 2018 OCEANS - MTS/IEEE Kobe Techno-Ocean (OTO)

    The conference scope is to provide a thematic umbrella for researchers working in OCEAN engineering and related fields across the world to discuss the problems and potential long term solutions that concernnot only the oceans in Asian pacific region, but the world ocean in general.

  • OCEANS 2017 - Aberdeen

    Papers on ocean technology, exhibits from ocean equipment and service suppliers, student posters and student poster competition, tutorials on ocean technology, workshops and town hall meetings on policy and governmental process.

  • OCEANS 2016 - Shanghai

    Papers on ocean technology, exhibits from ocean equipment and service suppliers, student posters and student poster competition, tutorial on ocean technology, workshops and town hall meetings on policy and governmental process.

  • OCEANS 2015 - Genova

    The Marine Technology Society and the Oceanic Engineering Society of IEEE cosponsor a joint annual conference and exposition on ocean science, engineering and policy. The OCEANS conference covers four days. One day for tutorials and three for approx. 450 technical papers and 50-200 exhibits.

  • OCEANS 2014 - TAIPEI

    The OCEANS conference covers all aspects of ocean engineering from physics aspects through development and operation of undersea vehicles and equipment.

  • OCEANS 2013 - NORWAY

    Ocean related technologies. Program includes tutorials, three days of technical papers and a concurrent exhibition. Student poster competition.

  • OCEANS 2012 - YEOSU

    The OCEANS conferences covers four days with tutorials, exhibits and three days of parallel tracks that address all aspects of oceanic engineering.

  • OCEANS 2011 - SPAIN

    All Oceans related technologies.

  • OCEANS 2010 IEEE - Sydney

  • OCEANS 2009 - EUROPE

  • OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean

  • OCEANS 2007 - EUROPE

    The theme 'Marine Challenges: Coastline to Deep Sea' focuses on the significant challenges, from the shallowest waters around our coasts to the deepest subsea trenches, that face marine, subsea and oceanic engineers in their drive to understand the complexities of the world's oceans.

  • OCEANS 2006 - ASIA PACIFIC

  • OCEANS 2005 - EUROPE


2018 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

This highly-regarded conference sponsored by IEEE’s Power & Energy Society aims to provide a premier platform for electrical engineers and scientists in universities, research centers and industry to present their works and to share experiences and ideas in the area of power and energy engineering. Attendees are provided with an unparalleled opportunity to interface with experts from all related fields including, but not limited to, power generation, power system management, power transmission and distribution, and smart grid technologies


2018 IEEE/OES Autonomous Underwater Vehicle Workshop (AUV)

Autonomous Marine Systems Research, Design and Applications


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Periodicals related to Thermocline

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Geoscience and Remote Sensing Letters, IEEE

It is expected that GRS Letters will apply to a wide range of remote sensing activities looking to publish shorter, high-impact papers. Topics covered will remain within the IEEE Geoscience and Remote Sensing Societys field of interest: the theory, concepts, and techniques of science and engineering as they apply to the sensing of the earth, oceans, atmosphere, and space; and ...


Geoscience and Remote Sensing, IEEE Transactions on

Theory, concepts, and techniques of science and engineering as applied to sensing the earth, oceans, atmosphere, and space; and the processing, interpretation, and dissemination of this information.


Oceanic Engineering, IEEE Journal of

Bayes procedures; buried-object detection; dielectric measurements; Doppler measurements; geomagnetism; sea floor; sea ice; sea measurements; sea surface electromagnetic scattering; seismology; sonar; acoustic tomography; underwater acoustics; and underwater radio communication.



Most published Xplore authors for Thermocline

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Xplore Articles related to Thermocline

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On the Relationship Between Wind, SST, and the Thermocline in the Seychelles–Chagos Thermocline Ridge

IEEE Geoscience and Remote Sensing Letters, 2017

This letter investigates the relationship between wind, sea surface temperature (SST), and thermocline in the Seychelles-Chagos Thermocline Ridge (SCTR, 5°S-10°S, 50°E-80°E) using a combination of satellite data and a reanalysis version of the HYbrid Coordinate Ocean Model from 1993 to 2012. The asymmetry of this relationship during positive and negative Indian Ocean Dipole (IOD) events and the impacts on the ...


Thermocline tracking using a portable autonomous underwater vehicle based on adaptive threshold

OCEANS 2016 - Shanghai, 2016

Thermocline has a significant impact on marine fishery, navy submarine activity, ocean circulation and internal wave. In consideration of long range, low cost, and high maneuverability, the AUV (Autonomous Underwater Vehicle) is an ideal platform for ocean local precisely thermocline tracking. Combining with the advantage of the AUV yo-yo movement, this paper presents a simple and effective thermocline tracking method. ...


Thermocline tracking based on peak-gradient detection by an autonomous underwater vehicle

OCEANS 2010 MTS/IEEE SEATTLE, 2010

Thermoclines play a key role in ocean circulation, marine ecology, and underwater acoustics. In oceanographic surveys, it is often desirable to detect the thermocline and track its spatio-temporal variation. Mobility of an autonomous underwater vehicle (AUV) makes it an efficient platform for thermocline tracking. In this paper, we present a fully autonomous algorithm for detecting and tracking the thermocline by ...


Analysis of Three-Dimensional Thermocline Based on Argo Data

2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO), 2018

The thermocline in the ocean is an important phenomenon in marine scientific research. Its distribution affects not only the delineation of vertical boundaries of water masses, but also the activities of underwater vehicles, the use of underwater acoustic instruments and the development of marine fisheries. Therefore, it is significant to determine the boundary of thermocline accurately. This paper adopts the ...


Using an Autonomous Underwater Vehicle to Track the Thermocline Based on Peak-Gradient Detection

IEEE Journal of Oceanic Engineering, 2012

The thermocline plays a key role in underwater acoustics and marine ecology. In oceanographic surveys, it is often desirable to detect the thermocline and track its spatio-temporal variation. Mobility of an autonomous underwater vehicle (AUV) makes it an efficient platform for thermocline tracking. In this paper, we present an autonomous algorithm for detecting and tracking the thermocline by an AUV. ...


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Educational Resources on Thermocline

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IEEE.tv Videos

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IEEE-USA E-Books

  • On the Relationship Between Wind, SST, and the Thermocline in the Seychelles–Chagos Thermocline Ridge

    This letter investigates the relationship between wind, sea surface temperature (SST), and thermocline in the Seychelles-Chagos Thermocline Ridge (SCTR, 5°S-10°S, 50°E-80°E) using a combination of satellite data and a reanalysis version of the HYbrid Coordinate Ocean Model from 1993 to 2012. The asymmetry of this relationship during positive and negative Indian Ocean Dipole (IOD) events and the impacts on the SST-thermocline depth (represented by the 20 °C isotherm depth, D20) relationship-are examined. On interannual timescales, an asymmetric relation between SST and zonal wind stress causes a strengthening of easterlies that enhances anticyclonic wind stress curl and local Ekman downwelling, which in turn deepens the D20 and increases the heat content during positive IOD (PIOD) events. In contrast, during negative IOD (NIOD) events, the winds reverse to be westerlies and cause a three times greater impact on remotely generated upwelling Rossby waves. Subsequently, these asymmetric relations cause an asymmetric D20-SST feedback in the SCTR such that a shoaling D20 is ~2.5 times more effective at lowering SST during NIOD events than a deepening D20 is at raising the SST during PIOD events. The changes to D20 are observed to extend into the year following IOD events, persisting into the end of the year following a PIOD event (due to stronger asymmetric reinforcing effects of warm SST anomalies on zonal wind anomalies) but only to May-June of the year following NIOD events.

  • Thermocline tracking using a portable autonomous underwater vehicle based on adaptive threshold

    Thermocline has a significant impact on marine fishery, navy submarine activity, ocean circulation and internal wave. In consideration of long range, low cost, and high maneuverability, the AUV (Autonomous Underwater Vehicle) is an ideal platform for ocean local precisely thermocline tracking. Combining with the advantage of the AUV yo-yo movement, this paper presents a simple and effective thermocline tracking method. According to the definition of the thermocline, we set a threshold, and in the real detect area, the threshold can change adaptively, thus we can draw the outline of the thermocline. Meanwhile, we present a method to determine bin size in order to solve the abruptness of robust and method's resolution. The simulation analysis was carried out using previous data of field test in the South China Sea.

  • Thermocline tracking based on peak-gradient detection by an autonomous underwater vehicle

    Thermoclines play a key role in ocean circulation, marine ecology, and underwater acoustics. In oceanographic surveys, it is often desirable to detect the thermocline and track its spatio-temporal variation. Mobility of an autonomous underwater vehicle (AUV) makes it an efficient platform for thermocline tracking. In this paper, we present a fully autonomous algorithm for detecting and tracking the thermocline by an AUV. The key is detection of the peak gradient of temperature. We have tested the algorithm by post- processing data from a previous Dorado AUV survey over the northern Monterey Bay shelf. We are in preparation for field tests of the algorithm on the newly developed long-range AUV Tethys.

  • Analysis of Three-Dimensional Thermocline Based on Argo Data

    The thermocline in the ocean is an important phenomenon in marine scientific research. Its distribution affects not only the delineation of vertical boundaries of water masses, but also the activities of underwater vehicles, the use of underwater acoustic instruments and the development of marine fisheries. Therefore, it is significant to determine the boundary of thermocline accurately. This paper adopts the K-means clustering method in machine learning to analyze the Argo data of the sea area (10.5°~25.5°S, 55.5°~80.5°S), and the distribution stereogram of this sea area data is obtained to determine the highly possible area of thermocline. Then the traditional thermocline determination method is combined with the information entropy method in machine learning to determine the thermocline and its boundary in this area. Finally, the occurrence area and boundary position of thermocline are obtained. In the future, this method can be applied to determine the thermocline in different areas, and then merge the regional thermoclines together to eventually realize the determination of the three- dimensional thermocline in the global sea area.

  • Using an Autonomous Underwater Vehicle to Track the Thermocline Based on Peak-Gradient Detection

    The thermocline plays a key role in underwater acoustics and marine ecology. In oceanographic surveys, it is often desirable to detect the thermocline and track its spatio-temporal variation. Mobility of an autonomous underwater vehicle (AUV) makes it an efficient platform for thermocline tracking. In this paper, we present an autonomous algorithm for detecting and tracking the thermocline by an AUV. The key is detection and close tracking of the maximum vertical gradient of temperature. On August 31 and September 1, 2010, the Tethys AUV ran the algorithm to closely track the thermocline across a sharp temperature front in Monterey Bay, CA.

  • Estimation of thermocline depths from SAR imagery and a two layer density model

    Imagery from the ERS-1 synthetic aperture radar (SAR) collected on July 18, 1992 was used to estimate the depth of the seasonal thermocline in the New York Bight. It was assumed that the internal wave packets observed in the SAR imagery were tidally generated at the shelf break and that the temporal spacing between the packets was 12.42 hours i.e. one M/sub 2/ tidal cycle. The wave speed of a packet was estimated by measuring the distance from the leading crest in one packet to the leading crest in the previous one and dividing by the tidal period. For each packet pair, nine separate measurements, evenly spaced along the wave crest, were used to obtain a mean separation between the packets. The mean of the observed internal wave speeds far the southern packet was 0.79 m/s with a deviation about the mean of 11%. The depth of the thermocline was computed from the wave speed derived from a simple two-layer fluid model for these internal wave dynamics. The densities were obtained from a joint Russian-United States internal wave experiment that was concurrent with the SAR overpass. The computed mean depth of the seasonal thermocline is 22 m. The average depth of the seasonal thermocline observed during the summer season from historical data was on the order of 20 m, which agrees with the estimated thermocline depth from the SAR imagery.

  • Experimental Study of Effects of Thermocline on the Performance of Underwater Glider's Thermal Engine

    The underwater glider's thermal engine utilizes ocean thermal energy to change the buoyancy of the glider, which enables it to ascend and descend. A phase change material as the working fluid inside the thermal engine tubes is sensitive to the surrounding seawater temperature, whose effects are different with various thermoclines. To obtain the detailed studies of the effects of the thermocline's depth, upper thickness, lower thickness and intensity on the performance of the thermal engine, a series of experimental investigations were carried out. The experimental results show that the solidification and melting time of the phase change material depend strongly on the thermocline's thickness and intensity. For the normal work of the thermal engine, there exist the threshold values of the thermocline's depth and upper thickness.

  • Passive ranging technique using waveguide invariant in shallow water with thermocline

    Waveguide invariant is widely used in underwater target passive ranging. In shallow water with uniform sound speed profile, the value of waveguide invariant is approximately a constant, while in shallow water with thermocline, it varies in a wide range. The waveguide invariant distributions and striations in these two conditions are analyzed respectively. On the basis of wavenumber difference between reflected modes and refracted modes, a wavenumber-frequency domain filtering technique is proposed to separate the two groups of modes. The required relationship between array element space, total array length and target azimuth for effective application is discussed. Finally, the simulation results indicate that in shallow water with a thermocline, refracted modes can be effectively filtered out using the wavenumber-frequency domain filtering technique and the target's range is estimated accurately.

  • Underwater Broadband Signal Waveform Fast Prediction Method in Shallow Water with a Thermocline

    For the case of transmission characteristic in shallow water channel, broadband acoustic model have to be considered. A rapid numerical prediction theory of underwater broadband signal waveform is studied in this paper. During building broadband acoustic model in shallow water with a thermocline, based on beam-displacement ray-mode theory (BDRM), approximate expansion of broadband acoustic model with respect to frequency and model parallelization will be used for rapid and accurate broadband signal waveform prediction. According to compare result, it offers a satisfactory degree of accuracy and the calculating speed has been improved comparing with conventional mode method.

  • Satellite microwave SST: accuracy, comparisons to AVHRR and Reynolds SST, and measurement of diurnal thermocline variability

    A global understanding. of the spatial/temporal variability of the diurnal thermocline is necessary for accurate parameterization of skin-bulk differences. Satellite microwave radiometers offer vital observations pertinent to this research, as they are capable of global, daily, coincident retrievals of skin sea surface temperature (SST),. wind-stress, cloud cover, and rain rate. These variables can be compared with a bulk SST, such as the Reynolds optimum interpolated SST, to examine skin-bulk relationships.



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