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Monday, April 20, 2020 | History

1 edition of Subduction experiment found in the catalog.

Subduction experiment

Subduction experiment

Cruise report RRS Charles Darwin : cruise number 73 : subduction 3 mooring deployment and recovery cruise, 30 September-26 October 1992

by

  • 284 Want to read
  • 8 Currently reading

Published by Woods Hole Oceanographic Institution in Woods Hole, Mass .
Written in English

    Subjects:
  • Deep-sea moorings.,
  • Oceanography -- Research.,
  • Marine meteorology -- Observations.,
  • Ocean-atmosphere interaction.

  • About the Edition

    Subduction is the mechanism by which water masses formed in the mixed layer and near the surface of the ocean find their way into the upper thermocline. The subduction process and its underlying mechanisms were studied through a combination of Eulerian and Langrangian measurements of velocity, measurements of tracer distrbutions and hydrographic properties and modeling. An array of five surface moorings carrying meteorological and oceanographic instrumentation were deployed for a period of two years beginning in June 1991 as part of an Office of Naval Research (ONR) funded Subduction experiment. Three eight month deployments were planned. The moorings were deployed at 18N 34W, 18N 22W, 25.5N 29W, 33N 22W and 33N 34W. A Vector Averaging Wind Recorder (VAWR) and an Improved Meteorological Recorder (IMET) collected wind speed and wind direction, sea surface temperature, air temperature, short wave radiation, barometric pressure and relative humidity. The IMET also measured precipitation. The moorings were heavily instrumented below the surface with Vector Measuring Current Meters (VMCM), and single point temperature recorders. Expendable bathythermograph (XBT) data were collected and meteorological observations were made while transitting between mooring locations. In addition a series of 59 cm stations were made and water samples taken to be analyzed for tritium levels, salinity and dissolved oxygen content. This report describes the work that took place during RRS Charles Darwin cruise number 73 which was the third scheduled Subduction mooring cruise. During this cruise the second setting of the moorings were recovered and redeployed for a third eight month period. This report includes a description of the instrumentation that was deployed and recovered, has information about the underway measurements (XBT and meteorological observations) that were made including plots of the data, includes a description of the work conducted in conjunction with the tracer/hydrography program and presents a chronology of the cruise events.

    Edition Notes

    Other titlesCruise report RRS Charles Darwin: cruise number 73., RRS Charles Darwin: cruise number 73.
    Statementby Richard P. Trask ... [et al.].
    SeriesUOP report -- 93-3., WHOI -- 93-18., WHOI (Series) -- 93-18.
    ContributionsTrask, Richard P., Charles Darwin (Ship)., Woods Hole Oceanographic Institution., Woods Hole Oceanographic Institution. Upper Ocean Processes Group.
    The Physical Object
    Pagination98 p. :
    Number of Pages98
    ID Numbers
    Open LibraryOL15199388M


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Subduction experiment Download PDF EPUB FB2

This book is devoted to the quantitative physical modeling of subduction and subduction-related processes. It presents a coherent description of the modeling method (including similarity criteria, and a novel applied experimental technique), results from model experiments, theoretical analysis of results on the basis of continuum mechanics, and their geodynamic interpretation.

The tectonic framework of the central Java subduction zone is presented in this study. Three marine wide-angle seismic profiles are analyzed by combined forward- and inverse modeling of first and later arrival traveltimes and are integrated together with marine gravity : Andreas Wittwer.

About this book. Subduction dynamics has been actively studied through seismology, mineral physics, and laboratory and numerical experiments.

Understanding the dynamics of the subducting slab is critical to a better understanding of the primary societally relevant natural hazards emerging from our planetary interior. The Subduction Experiment Cruise Report R/V Subduction experiment book Cruise Number Leg XV Subduction 3 Mooring Recovery Cruise 13 - Subduction experiment book June by Richard P.

Subduction is the tectonic process at convergent margins by which slabs of oceanic lithosphere descend into the mantle. Previous article in issue: Present-day strain accumulation and slip rates associated with southern San Andreas and eastern California shear zone faults.

Previous article in issue. A Sociology Experiment is designed for instructors teaching Introduction to Sociology (or related courses) who want to assign a uniquely engaging set of chapters written by a diverse group of the best writers and teachers in every area of Sociology.

It is for those who want to integrate supplemental readings, videos, Subduction experiment book, and data from the web. Subducting slabs provide the main driving force for plate motion and flow in the Earth’s mantle1,2,3,4, and geodynamic, seismic and geochemical studies offer insight into slab dynamics and Cited by: The Subduction Experiment Cruise Report RI Oceanus Cruise Number Leg 3 Subduction 1 Mooring Deployment Cruise 17 June - 5 July by Richard P.

Trask Nancy J. Subduction experiment book Brink DOCUMENT: LIBRARY Woods Hoie Oceanographic. Such settings have resulted in systematic accretionary prism formation from the early Miocene in the Boso-Miura peninsular area to the present in the Sagami Trough area.

We modeled the tectonics by a simple sandbox experiment. Systematic fault and fracture patterns of the oblique subduction type are predicted to occur during arc-arc collision.

The Meso-American Subduction Experiment (MASE) and the Cocos Plate Subduction Zone Jean Ball-Meza Works Cited: Ferrari, Luca, Teresa Orozco-Esquivel, Vlad Manea, and Marina Manea.

"The Dynamic History of the Trans-Mexican Volcanic Belt and the Mexico Subduction Zone.". Earthquake Research Institute, The University of Tokyo, TokyoJapan, and Research and Development Center for Ocean Drilling Science, Japan Agency for Marine-Earth Science and Technology, Yokohama, KanagawaJapan.

(A temperature hot enough to melt lithosphere is about a thousand degrees!). This process is called "subduction". Melted crust rises back towards the surface where it helps make volcanoes and islands. Thus the formation of some volcanoes, mountains, and islands is connected to the process of subduction and continental drift.

The second experiment shows the effects of an active basement thrust slice as it enters a subduction zone. This process may have happened in the eastern Nankai accretionary wedge.

Subduction dynamics has been actively studied through seismology, mineral physics, and laboratory and numerical experiments. Understanding the dynamics of the subducting slab is critical to a better understanding of the primary societally relevant natural hazards emerging from our planetary interior, the megathrust earthquakes and consequent tsunamis.

The subject of experimental tectonics is the study of geodynamic processes by means of laboratory scale models.

The first roughly scaled experiments were performed by Sir James Hall about two centuries ago, in the intellectual atmosphere generated by the appearance of Hutton's Theory of the Earth (Hutton, J., Theory of the Earth, with Proofs and Illustrations, by:   Lecture 24/11/ tectonica sperimentale.

[1] Three‐dimensional laboratory models of upper mantle subduction are presented investigating the effect of the trench velocity (v t) and the slab to upper mantle viscosity ratio (η SP /η UM) on trench curvature and slab set of experiments varies η SP /η UM from 66 to Another set of experiments modifies v t through applying different velocities at the trailing by:   This file contains Supplementary Movie 2 illustrating the progressive evolution of an intermediate-width-slab subduction experiment (W = km) from a three-dimensional perspective.

Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle.

Regions where this process occurs are known as subduction zones. Rates of subduction are typically measured in centimeters per year, with the average rate of convergence being approximately.

At low plate thickness (experiment 1, h′ = ; experiment 2, h′ = ; Figure 4b), the subduction velocity is slowed down in a more significant way.

The first phase ends after a dimensionless time of while the subduction attains the steady state behavior only after a dimensionless time of MASE - Meso-America Subduction Experiment. This array consisted of bradband sensors deployed along a km line that runs from Acapulco on the Pacific to near Tampico on the Gulf of Mexico, passing through Mexico City.

The stations al had Guralp 3T broadband sensors ( sec to 50 Hz) and were deployed from /01 to / LAB: EARTHQUAKE DEPTHS AT SUBDUCTION ZONES by Charles Burrows BACKGROUND: A convergent boundary is a boundary between two plates that are moving toward each other, or converging.

Two broad classifications for convergent boundaries are subduction boundaries and collision Size: KB. Subduction dynamics has been actively studied through seismology, mineral physics, and laboratory and numerical experiments. Understanding the dynamics of the subducting slab is critical to a better understanding of the primary societally relevant natural hazards emerging from our planetary interior, the megathrust earthquakes and consequent : Gabriele Morra.

- Subduction zone: the place where two lithospheric plates come together, one riding over the other - Density: mass per unit volume - Earthquake: the result of a sudden release of energy in the Earth's crust that creates seismic waves.

Where two tectonic plates converge, if one or both of the plates is an oceanic lithosphere, a subduction zone will form. When crust is formed at a mid-ocean ridge, it is hot and buoyant meaning it has a low density.

As it spreads away from the ridge and cools and contracts, or becomes denser. A three-dimensional ocean general circulation model, forced by idealized zonal winds, is used to investigate the effect of an abrupt intensification of westerly winds on the subduction process. Four experiments are carried out: 1) a control experiment with standard wind stress forcing, 2) an intensified winds experiment with wind stress that is Cited by: a standard of comparison for checking or verifying the results of an experiment where all variables must be held constant convection the transfer of thermal energy by movement of a liquid or gas subduction zone the region where two plates collide and one plate sinks below the other.

The mooring component of the Subduction Experiment took place in the eastern subtropical North Atlanticbetween June and June (Brink et al. ).A large-scale, five-buoy array was maintained across the eastern flank of the Azores high over two annual by:   In early s the author was also stimulated by Kuno’s work and participated in the studies of magma genesis in island arcs by conducting high-pressure experiments.

In this brief article, studies on the origin of subduction zone magmas are briefly reviewed, with special reference to the author’s relevant experimental by: During the to Office of Naval Research-funded Subduction Experiment, designed to examine the descent of near surface water as it moves south in the eastern portion of the subtropical gyre, we tried an approach that appears to provide a first.

Other articles where Subduction is discussed: Africa: General considerations: the present Nile River, by subduction processes identical to those observed today.

(Subduction involves the descent of the edge of one lithospheric plate beneath that of another where two such plates collide.).

Major features of the Cascadia Subduction Zone USGS. Last great Earthquake. Great earthquake on Janu The last great Cascadia earthquake happened over years ago. Records of the event were not written down but researchers have discovered through evidence in peat bogs, tree rings and Japanese tide records of a tsunami when the event occured and the time based on the speed of.

Subduction is when two tectonic plates meet. One of the plates is pushed under the other into the Earth's tion causes the most powerful earthquakes in the world. Earthquakes caused by subduction can lead to tsunamis. Areas where subduction occurs are called subduction zones.

Subduction zones are all around the world in places like Indonesia, Seattle, Washington and in the. Subduction Boundary Lab Introduction: The vast majority of earthquakes occur at plate boundaries. The deepest earthquakes occur at subduction boundaries where lithosphere is plunging down into the mantle.

Deep focus earthquakes are defined as those with foci (plural of File Size: KB. Chapter 1 Plate Tectonics. Chapter 1 focuses on Plate Tectonics, looking at the Earth's layers, Earth's evolution, and plate movement.

Lessons included in this chapter: #1 The Earth's Layers #2 Pangea to Present #3 How Earth's Plates Move. Resources for Teachers can be found under the Chapter #1 Copymaster. Select from the options on the right. Start studying Science chapter 8- plate tectonics. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

at subduction zones where two plates get stuck together for centuries, then suddenly let go. c) Simulate a transform plate boundary by sliding the two cookie pieces laterally past one another, over the creamy filling.

You can feel and hear that the “plates” do not slide smoothly past one another, but rather stick then let go, stick then let Size: 2MB. Subduction zones are some of the most seismically active areas on earth.

Earthquakes in these spots that occur close to the surface can be devastating, like the one that struck Japan in. Subduction dynamics has been actively studied through seismology, mineral physics, and laboratory and numerical experiments.

Understanding the dynamics of the subducting slab is critical to a better understanding of the primary societally relevant natural hazards emerging from our planetary interior, the megathrust earthquakes and consequent by: 4.