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2008-11-11

Commission 3 - Earth Rotation and Geodynamics (2007-2011)

URL: http://www.earthsciences.osu.edu/IAG-C3

posted by
Sz. Rózsa
President: Michael Bevis (USA)
Vice President: Richard Gross (USA)

Terms of Reference

Geodynamics in the broader and most traditional sense addresses the forces that act on the earth, whether they derive from outside or inside of our planet, and the way in which the earth moves and deforms in response to these forces. This includes the entire range of phenomena associated with earth rotation and earth orientation such as polar motion, length of day variation, precession and nutation, the observation and understanding of which are critical to the transformation between terrestrial and celestial reference frames. It also includes tidal processes such as solid earth tides and ocean loading tides.

During the last few decades many geophysicists have come to use geodynamics in a more restricted sense to address processes such as plate tectonics and postglacial rebound that are dominantly endogenic processes. Because the earth as a mechanical system responds to both endogenic and exogenic forces, and these responses are sometimes coupled, Commission 3 studies the entire range of physical processes associated with the motion and the deformation of the solid earth. The purpose of Commission 3 is to promote, disseminate, and, where appropriate, to help coordinate research in this broad arena.

Sub-commission 3.1 (Earth Rotation and Earth Tides) addresses the entire range earth rotation phenomena in-cluding tidal deformation.
Sub-commission 3.2 (Tectonic Deformation) addresses the entire range of tectonic phenomena including plate tectonics, intraplate deformation, the earthquake deformation cycle, a-seismic phenomena such as episodic tremor and slip, and volcanic deformation. Sub-commission 3.3 (Geophysical Fluids) addresses the space-time variation of atmospheric pressure, seafloor pressure and the surface loads associated with the hydrological cycle, and earth's (mainly elastic) responses to these mass redistributions. Sub-commission 3.4 (Cryospheric Change and Earth Deformation) addresses the earth's instantaneous and delayed responses to ice mass changes, including seasonal (cyclical) mass changes and progressive changes associated with climate change. This group will study postglacial rebound at all spatial scales, and also the elastic deformation taking place in the near-field of existing ice sheets and glaciers.

The areas addressed by the various sub-commissions sometimes overlap. Commission 3 also has overlapping interests with other entities within the IAG, and with Commissions in other Associations such as the Inter-national Astronomical Union (IAU). The recent space mission GRACE has expanded our common interests with IAG Commission 2 (Gravity) since temporal changes in gravity are associated with both with the drivers of earth deformation (e.g. changing ice and loads) and with earth's response to these and other forcing.

Objectives

To develop cooperation and collaboration the theory, modelling and observation of Earth rotation and geo-dynamics, and to ensure development of research in these areas by organizing meetings, symposia, and general assemblies, by creating working groups on specific topics, and by encouraging exchange of ideas and data, comparisons of methods and results improving the accuracies, content, methods, theories, and under-standing of Earth rotation and geodynamics. To serve the geophysical community by linking them to the official organization providing the International Refer-ence Systems/Frames and Earth orientation parameters (IERS and related bodies), and organizations providing all the other data on which geodynamics and Earth rotation studies can be performed.

Structure

Sub-Commissions
  • SC 3.1: Earth Rotation and Earth Tides
    President: Gerhard Jentzsch (Germany)
  • SC 3.2: Tectonic Deformation
    President: Markku Poutanen (Finland)

  • SC 3.3: Geophysical Fluids
    President: Aleksander Brzezinski (Poland)

  • SC 3.4: Cryospheric Change and Earth Deformation
    President: James Davis (USA)


Inter-Commission Project
  • IC-P3.1: Global Geodynamics Project (GGP) (Joint with Commission 2)
    Chair: David Crossley (USA)
  • IC-P3.2: Working Group of European Geoscientists for the Establishment of Networks for Earth science Research (WEGENER) (Joint with Commission 1)
    Chair: Susanna Zerbini (Italy)


Inter-Commission Study Groups
  • IC-SG6: InSAR for Tectonophysics
    Chair: Masato Furuya (Japan)
  • IC-SG7: Temporal Variations of Deformation and Gravity
    Chair: Detlef Wolf (Germany)


Program of Activities

Commission 3 fosters and encourages research in the areas of its sub-entities by facilitating the exchange of information and organizing Symposia, either independ-ently or at major conferences in geodesy or geophysics. Some events will be focused narrowly on the interests of the sub-commissions and other entities listed above, and others will have a broader commission-wide focus. Our activities will be announced on our main website www.earthsciences.osu.edu/IAG-C3.

Steering Committee
  • President: Michael Bevis (USA)
  • Vice President: Richard Gross (USA)
  • President SC3.1: Gerhard Jentzsch (Germany)
  • President SC3.2: Markku Poutanen (Finland)
  • President SC3.3: Aleksander Brzezinski (Poland)
  • President SC3.4: James Davis (USA)
  • President IC-P3: David Crossley (USA)
  • President IC-SG7: Detlef Wolf (Germany)
  • Representative of IGFS: Srinivas Bettadpur (USA)



Sub-Commissions


SC 3.1 Earth Rotation and Earth Tides
President: Gerhard Jentzsch (Germany)
http://www.geo.uni-jena.de/geophysik/etc/

Terms of Reference

Sub-commission 3.1 (Earth Rotation and Earth Tides) addresses the entire range of earth rotation phenomena including tidal deformation, both on the experimental as well as on the theoretical level.

Earth tides and Earth rotation observations have a very long tradition. These observations led to the discovery of the Earth’s elastic properties which cause tidal deforma-tion and variations in Earth orientation and rotation parameters. The phenomena responsible for these variations include the full range of periodic and non-periodic phenomena like Earth tides and ocean tidal loading, atmospheric dynamics as well as plate tectonics and intraplate deformation. The periods range from seismic normal modes over Earth tides until the Chandler Wobble and beyond. Thus, the time scales range from seconds to years and for the spatial scales from millimetres to continental dimension.

As tidal friction is affecting Earth rotation, all the geo-physical properties of the Earth contribute to the explanation of this phenomenon. Therefore, the research on tidal deformation due to tidal potential and ocean loading are a prerequisite to answer such questions.

Further, Earth tides and loading tides are affecting the position of fiducial sites and have to be corrected for pro-viding stable references. Such references are needed for the observation and monitoring of changes at the Earth’s surface at global, regional and local scales. Therefore, there is a considerable contribution to global geo-dynamics as well as to climate changes by supplying primary constraints for the correction of other observa-tions, and also for modelling processes of the planet as a whole as well as for understanding geophysical phenom-ena occurring at smaller scales.

Tidal gravimetry has helped to improve the knowledge about Earth’s dynamics, as well as about Earth’s global structure. It is a powerful tool providing information to global terrestrial gravity field and its temporal variations. Especially superconducting gravimeters allow continuous monitoring of the gravity signal at a given site with a pre-cision of better than 10-10. These geophysical observation together with other geodetic observations and geological sources of information provide the means to understand-ing the structure, dynamics and evolution of the Earth system.

Last but not least SC3.1 is also responsible for the Inter-national Centre of Earth Tides (ICET), which is to be moved from the Royal Observatory of Brussels, Belgium, to the French University of Polynesia, Tahiti.

Objectives

General objectives of the Sub-Commission 3.1 include:
  • to study new observation techniques;
  • to study the relation between Earth tides and ocean tides;
  • to study the effects of meteorologic parameters on the observations;
  • to study the dynamics of the Earth at tidal and non-tidal frequencies;
  • to study the interplay of tides and Earth rotation;
  • to study tides on the planets;
  • to study the effects of ocean loading and global water distribution;
  • to organize working groups on specific topics;
  • to promote, develop and coordinate international con-ferences and programs related to observations, analysis and data interpretation for the fields mentioned above;
  • to contribute reference frame related work in order to better understand deformations and improve global, regional and local reference frames and their dynami-cal modelling;
  • to promote the development of appropriate models;
  • to advice the International Centre of Earth Tides (ICET).


The sub-commission is aware that the objectives of the IAG Global Geodetic Observing System (GGOS) includ-ing e.g.
  • the integral effect on Earth rotation of all angular momentum exchange inside the Earth, between land, ice, hydrosphere and atmosphere, and between the Earth, Sun, Moon, and planets,
  • the geometric shape of the Earth's surface (solid earth, ice and oceans), globally or regionally, and its tempo-ral variations, whether they are horizontal or vertical, secular, periodical or sudden, and
  • by adding the Earth's gravity field-stationary and time-variable-mass balance, fluxes and circulation

are in close relation to our objectives. Therefore, SC3.1 also touches the topic ‘Tidal effects in the framework of GGOS’.

Structure and Forms of Activities

The Sub-Commission 3.1 on Earth rotation and Earth tides has a President and a Vice-President. National representatives are involved into preparations of confer-ences as well as into the considerations concerning the award of the Earth Tide Medal.
Further, SC3.1 comprises working groups to work for different sub-topic s like:
  • Earth Tides in Geodetic Space Techniques, co-chaired by H. Schuh and Wu Bin;
  • Analysis of Environmental Data for the Interpretation of Gravity Measurements, co-chaired by C. Kroner and G. Jentzsch, and
  • Gravitational Physics, chaired by L. Mansinha, as well as
  • Precise Tidal Prediction, chaired by Y. Tamura.


Beside the organization of special sessions at inter-national meetings, the SC3.1 will continue to organize a symposium every four years (next in Jena in September, 2008: www.ets2008.de). In between these symposia, a comprehensive working group meeting together with the GGP-project was and will be organized again. We will continue to publish the outcome of these meetings in pro-ceedings, either separate ones or as special issues of scientific journals.

Related Working Groups

First, SC3.1 is linked to the sub-commissions SC3.2 and SC3.3, and the next Earth Tide Symposium will be orga-nized as a joint meeting covering a broader range of topics.

The inter-commission project GGP (Global Geodynamics Project) was promoted by the previous sub-commission, and future cooperation is one main focus. Other inter-commission study groups can be included if possible.

SC3.1 will also cooperate with GGOS, as mentioned above.


SC 3.2 Tectonic Deformation
President: Markku Poutanen (Finland)
Vice President: Jeffrey Freymueller (USA)
http://iagsc32.fgi.fi/

Terms of Reference

There are many geodetic signals that can be observed and are representative of the deformation mechanisms of the Earth's crust at different spatial and temporal scales. This include the entire range of tectonic phenom-ena including plate tectonics, intraplate deformation, the earthquake deformation cycle, a-seismic phenomena such as episodic tremor and slip, and volcanic deforma-tion. The time scales range from seconds to years and from millimetres to continental dimension for the spatial scales.

Space geodetic measurements provide nowadays the means to observe deformation and movements of the Earth's crust at global, regional and local scales. This is a considerable contribution to global geodynamics by sup-plying primary constraints for modelling the planet as a whole, but also for understanding geophysical phenom-ena occurring at smaller scales.

Gravimetry, absolute, relative and nowadays also space-borne, is a powerful tool providing information to the global terrestrial gravity field and its temporal variations. Superconducting gravimeters allow a continuous acquisi-tion of the gravity signal at a given site with a precision of 10-10. This is important in order to be able to detect and model environmental perturbing effects as well as the weak gravity signals associated with vertical crustal movements of the order of mm/yr. These geodetic obser-vations together with other geophysical and geological sources of information provide the means to understand-ing the structure, dynamics and evolution of the Earth system.

One of the key issues nowadays is the definition and sta-bility of global and regional reference frames. Tectonic deformations in all time and spatial scales as well as mass transfer will affect reference frames. The work done in SC3.2 will deal in information essential to the reference frames.

Objectives

General objectives of the Sub-commission 3.2 will include:
  • to study tectonic motions, including plate deforma-tion;
  • to study local crustal movements, some of which could be potentially hazardous
  • to contribute reference frame related work in order to better understand deformations and improve global, regional and local reference frames and their dynami-cal modelling;
  • to study sea-level fluctuations and changes in relation to vertical tectonics along many parts of the coastlines and in relation to environmental fluctuations/changes affecting the geodetic observations;
  • to co-operate with SC3.4 in studies of postglacial rebound;
  • to promote, develop and coordinate international pro-grams related to observations, analysis and data inter-pretation for the fields of investigation mentioned above;
  • to promote the development of appropriate models.
    One should also notice that the objectives of the IAG Global Geodetic Observing System (GGOS) include e.g.
  • the integral effect on Earth rotation of all angular momentum exchange inside the Earth, between land, ice, hydrosphere and atmosphere, and between the Earth, Sun, Moon, and planets,
  • the geometric shape of the Earth's surface (solid earth, ice and oceans), globally or regionally, and its tempo-ral variations, whether they are horizontal or vertical, secular, periodical or sudden, and
  • by adding the Earth's gravity field-stationary and time-variable-mass balance, fluxes and circulation.


According to these objectives, SC3.2 should have close contacts to the GGOS activities, because many of the items are shared in the plans of GGOS and SC3.2. Focus on SC3.2 will be on understanding and modelling tectonic motions so that their effect on reference frames can be better applied.

Structure and Forms of Activities

The Sub-Commission 3.2 on Tectonic Deformation com-prises sub-entities or working groups corresponding either to different geographical regions or different important and actual topics involved in the field of the Sub-Commission studies. These sub-entities are dealing with main scientific objectives having common general aspects and, in parallel to these objectives, follow the development of technology and measurement tech-niques capable to best fulfil the scientific objectives.

The SC3.2 will promote itself, but also encourage its working groups and other related groups or institutions to organize meetings or larger scientific conferences for selected scientific or technological subjects. Outcome of these meetings will be published in Proceedings, either separate one or as special issues of scientific journals.

Our meetings will be announced at http://iagsc32.fgi.fi/ and http://www.earthsciences.osu.edu/IAG-C3.

Links
  • SC 3.4 Cryospheric Change and Earth Deformation: James Davis (USA)
  • Asia-Pacific Space Geosynamics (APSG): Kosuke Heki (Japan)
  • Central Europe Regional Geodynamics Project (CERGOP): Janusz Sledzinski (Poland)
  • IC-P3.2: Working Group of European Geoscientists for the Establishment of Networks for Earth science Research (WEGENER): Susanna Zerbini (Italy)


The list will be updated later with representatives of respective fields. The SC is open to everyone interested in the tectonic deformation and related topics. An e-mail list will be updated continuously.

Related Working Groups

During the period 2003-2007, there existed a sub-group Geodynamics of the Central Europe, chaired by Janusz Sledzinski (Poland). Co-operation with this group will be continued.

Close contacts with the “Working group of European Geoscientists for the Establishment of Networks for Earth science Research” (WEGENER) will be continued.

An ILP (International Lithosphere Program) Regional Co-ordination Committee CC 1/5 DynaQlim (Upper Mantle Dynamics and Quaternary Climate in Cratonic Areas, chaired by Markku Poutanen) established in 2007 will link SC3.2 geodetic studies in other disciplines like geology, geophysics and seismology. The ILP is charged with promoting multidisciplinary research projects of interest to both the geological (IUGS) and geophysical (IUGG) communities.


SC 3.3 Geophysical Fluids
President: Aleksander Brzezinski (Poland)

Terms of Reference

Mass transport in the atmosphere-ocean-cryosphere-mantle-core system, or the 'global geophysical fluids', cause observable geodynamic effects on broad time scales. Although relatively small, these global geo-dynamic effects have been measured by space geodetic techniques to increasing, unprecedented accuracy, open-ing up important new avenues of research that will lead to a better understanding of global mass transport processes and of the Earth’s dynamic response. Angular momenta and the related torques, gravitational field coefficients, and geocentre shift for all geophysical fluids are the relevant quantities. They are studied theoretically and are observed using global-scale measurements and/or products from state-of-the-art models, some of which assimilate such measurements.

Objectives

The objective of the Sub-Commission is to serve the scientific community by supporting research and data analysis in areas related to variations in Earth rotation, gravitational field and geocentre caused by mass trans-port in the geophysical fluids, which include the atmos-phere, ocean, continental water, mantle, and core along with geophysical processes associated with ocean tides and the hydrological cycle.

The Sub-Commission is aware that its objectives overlap with the objectives of the IAG Global Geodetic Observing System with its central theme "Global deformation and mass exchange processes in the Earth system" and the following areas of activities
  • deformation due to the mass transfer between solid Earth, atmosphere, and hydrosphere including ice;
  • quantification of angular momentum exchange and mass transfer.


Program of Activities

Sub-Commission 3.3 follows the Program of Activities defined by Commission 3. In addition, SC 3.3 interacts with the sister organizations and services, particularly with the IERS Global Geophysical Fluids Centre and its eight Special Bureaus: for the Atmosphere, Oceans, Tides, Hydrology, Mantle, Core, Gravity/Geocentre, Loading. Due to the overlapping of the tasks, SC 3.3 should also have close contacts to the GGOS activities. Our meetings will be announced at http://www.earthsciences.osu.edu/IAG-C3.

Structure
  • Atmosphere (David Salstein)
  • Oceans (Rui Ponte)
  • Tides (Jim Ray)
  • Hydrology (Ben Chao)
  • Mantle (Richard Peltier)
  • Core (Tim Van Hoolst)
  • Gravity/Geocentre (Erricos Pavlis)
  • Loading (Pascal Gegout)



SC 3.4 Cryospheric Change and Earth Deformation
President: James Davis (USA)
Vice-President : Detlef Wolf (Germany)

Terms of Reference

Past and present changes in the mass balance of the earth's glaciers and ice complexes induce present-day deformation of the solid earth on a range of spatial scales, from the very local to global. The earth's defor-mational response to cryospheric change is complex due to a number of factors, including: complexities in the viscoelastic structure of the earth; the spatial and temporal variability of the mass changes; and the inter-action between the cryosphere and the ocean, which lead to a redistribution of cryospheric mass in a highly dynamic system. These complexities pose both observa-tional and modelling challenges. The purpose of Sub-commission 3.4 is to promote, and where appropriate, to help coordinate research involving geodetic observation and modelling of earth deformation due to past and ongoing cryospheric changes, with emphasis on present-day deformation taking place in the near field of existing ice sheets and glaciers and the extent to which this de-formation is a response to climate change.

Program of Activities

Our meetings will be announced at http://www.earthsciences.osu.edu/IAG-C3.


Inter-Commission Projects


IC-P 3.1 Global Geodynamics Project (GGP) (Joint with Commission 2)
Chair: David Crossley (USA)

Terms of Reference

The purpose of the Global Geodynamics Project (GGP) is to maintain a network of superconducting gravimeters (SG) to monitor all changes in the Earth's gravity field at periods of seconds and longer. GGP started on July 1, 1997, and since then 1 minute data has been archived in the GGP database at the International Centre of Earth Tides (ICET, Commission 3). Due to the strong overlap between Earth Rotation, Earth Tides, and The Gravity Field, GGP became an IAG Inter-Commission Project in 2003, and reports to both Commissions 2 and 3.

The SG is currently the most sensitive and stable instru-ment for the measurement of the vertical component of the Earth's gravity field, with a time domain error of <0.1 microgal and a frequency domain accuracy of 1 nGal. When combined with absolute gravimetry at the same station, the instruments together are able to measure long term changes in gravity with an error of 1-2 microgal per year. Each SG is the focus of a national effort to provide a continuous gravity record for geodetic and geophysical research. The GGP is an opportunity for the various SG groups to participate in a global campaign to monitor the gravity field and to exchange the raw data. GGP does not have a mandate to establish or fund new stations.

Objectives

The objective of GGP is to maintain standards for the collection of SG data, and provide an accessible data-base for global use. Precise measurements of the Earth's gravity field are essential to answer a number of impor-tant questions in geodesy and geophysics: (a) the gravity effect of the global atmospheric loading and mass re-distribution on the solid Earth, (b) the use of precise tidal analysis to refine estimates of the nearly diurnal free wobble of the Earth and models of oceanic loading, (c) observation of changes in gravity associated with slow and silent earthquakes, tectonic motions, sea-level changes and post-glacial rebound, (d) monitoring the rotation pole of the Earth on a time scale of minutes, (e) accurate observations of seismic normal modes, espe-cially in the long-period band below 1 mHz and to deter-mine precise amplitudes, (f) monitor gravity changes associated with hydrology (soil moisture and ground-water) at fiducial sites, (g) provide ground truth for gravity satellite missions where a sufficient density of SGs are located on the surface, and (h) provide data and information on gravity effects associated with motions of the inner core and in the outer fluid core.

Program of Activities

GGP meets at least once a year, either at a national con-ference to hold business meetings, or to hold a GGP Workshop where scientific papers are presented. A GGP Newsletter is circulated at about 6 month intervals, and we maintain a webpage for general information.
SG groups send data to ICET once a month, and the data is archived through an arrangement with ISDC/GFZ in Potsdam. Within 1 year of collection, the data is released to the scientific community.

Membership
  • Secretary: J. Hinderer
  • Representative to GGOS: J. Hinderer
  • SG group leaders:
  • Y. Fukuda (Kyoto U., Japan)
  • J. Hinderer (IPG Strasbourg, France)
  • C. Hwang (National CTU Taiwan)
  • Y. Imanishi (Tokyo U., Japan)
  • J.-W. Kim (Sejong U., S. Korea)
  • J. Liard (GSC Ottawa, Canada)
  • B. Meurers (U. Vienna, Austria)
  • J. Neumeyer (GFZ, Potsdam)
  • K. Shibuya (NIPR, Tokyo, Japan)
  • H.-P. Sun (IGG, Wuhan, China)
  • Y. Tamura (NAO Mizusawa, Japan)
  • M. van Camp (ROB, Brussels)
  • H. Virtanen (FGI, Masala, Finland)
  • H. Wilmes (BKG, Germany)


The GGP mailing list comprises about 100 names.


IC-P 3.2 Working Group of European Geoscientists for the Establishment of Networks for Earth Science Research (WEGENER )
(joint with Commission 1)

Chair: Susanna Zerbini (Italy)

Terms of Reference

The evolution of geodetic techniques in the past decade, with unprecedented achievements in the precise detection and monitoring of 3D movements at the millimetre level has opened new prospects for the study of Earth kinematics and hence dynamics. However, those achievements also raised new issues that have to be properly taken into account in the processing and analysis of the data, demanding a careful inter-disciplinary approach.

Areas in Europe, primarily in the broad collision zone between Europe, Africa and Arabia, provide natural laboratories to study crucial and poorly understood geo-dynamic processes. These have been systematically monitored in the last decade by different research groups using a variety of space geodetic and other techniques.

However, in general data analysis has been done from the perspective of one discipline and processing procedures have not always followed a standard approach.

The existence of these data (geodata) never completely explored, justifies a new insight by using a really inte-grated approach that combines data from different observational techniques and input from other disciplines in the Earth Sciences. This should lead to the development of interdisciplinary work in the integration of space and terrestrial techniques for the study of the Eurasian/African/Arabian plate boundary deformation zone (and adjacent areas), and contribute to the estab-lishment of a European Velocity Field.

With that purpose it is important to promote stronger international cooperation between Earth-Scientists inter-ested in the that plate boundary zone. Towards that goal the WEGENER project aims to:
  • Actively encourage the cooperation of all geoscientists studying the Eurasian/African/Arabian plate boundary deformation zone, by promoting the exploitation of synergies;
  • Be a reference group for the integration of the most advanced geodetic and geophysical techniques by developing the adequate methodologies for a correct data integration and interpretation;
  • Act as a forum for discussion and scientific support for geoscientists from all over the world interested in unraveling the kinematics and mechanics of the Eurasian/African/Arabian plate boundary deformation zone;
  • Promote the use of standard procedures for geodetic data, in particular GPS data, quality evaluation and processing.


The need to involve different research areas demands for collaboration with different IAG Commissions and in particular Commission 1 and Commission 3. Commis-sion 1 is responsible for regional and global reference frames, for the coordination of space techniques and for satellite dynamics. WEGENER can contribute signifi-cantly to each one of these areas and, in particular, to regional and global reference frames by making avail-able, in its study area, quality-tested regional data sets acquired with different space and terrestrial techniques, as well as relevant quality-tested solutions. Additionally WEGENER can contribute by carrying out studies, already being developed by WEGENER member groups, on the definition of effective integrated observational strategies.

Objectives

The primary goals of the WEGENER project are:
  • Continue as a framework for geodetic/geophysical/geological cooperation in the study of the Eurasian/African/Arabian plate boundary zone;
  • Foster the use of space-borne, airborne and terrestrial hybrid techniques for earth observation;
  • Define effective integrated observational strategies for these techniques to reliably identify and monitor crustal movements and gravity field variations over all time-scales;
  • Facilitate and stimulate the integrated exploitation of data from different techniques in the analysis and interpretation of geo-processes;
  • Organize periodic meetings with special emphasis on interdisciplinary research and interpretation and modelling issues;
  • Reinforce cooperation with African and Arabian countries and colleagues, which can both contribute to understanding the kinematics and dynamics of the Eurasian/African/Arabian plate boundary zone and promote the growth of such research in these coun-tries.


Planned Activities
  • Build up a web-portal and an associated geo-data-base that enables access to metadata, for the WEGENER geographical area, with results and when possible historical data from episodic campaigns, including geodetic, geophysical and geological data, and results for strain rates, velocity fields, focal mechanisms, etc.;
  • Define standards for GNSS network establishment, data acquisition and guidelines for data processing and reliability checks.
  • Define strategies for a full exploitation of different geodata (GNSS, gravimetry, InSAR, seismic, etc.);
  • Establish a GPS analysis centre specially dedicated to process permanent and episodic campaign data, not analyzed by other GPS centres, which will contribute to the development of a joint velocity field (EURO-VEL) that can support kinematic and geodynamic modelling in the WEGENER area of interest;
  • Organize bi-annual conferences to serve as high-level international forum, in which scientists from all over the world can look at a multidisciplinary interpretation of geodynamics, and strengthen the collaboration between countries (North-South collaboration);


Link to Services

The WEGENER Inter-Commission project will establish links to different relevant services, such as:
  • EUREF;
  • International Earth Rotation and Reference Systems Service (IERS);
  • International GNSS and Reference Frame Service (IGS);
  • International Laser Ranging Service (ILRS);
  • International VLBI Service for Geodesy and Astro-metry (IVS);
  • International DORIS Service (IDS);
  • Regional Reference Frame Northern Africa (AFREF);
  • Global Geodetic Observing System (GGOS).


Membership
  • Chair: Susanna Zerbini (Italy)
  • Board Members
    • Boudewijn Ambrosius, The Netherlands, B.A.C. Ambrosius@lr.tudelft.nl
    • Luisa Bastos, Portugal, lcbastos@fc.up.pt
    • Matthias Becker, Germany, becker@ipg.tu-darmstadt.de
    • Richard Bingley, United Kingdom, richard. bingley@nottingham.ac.uk
    • Carine Bruyninx, Belgium, carine.bruyninx@oma. be
    • Alessandro Caporali, Italy, alessandro.caporali@unipd.it
    • Ludwig Combrink, South Africa, ludwig@hartrao. ac.za
    • Josč Martin Davila, Spain, mdavila@roa.es
    • John LaBrecque, USA, John.LaBrecque@nasa.gov
    • Taoufik Mourabit, Morocco, tmourabit@menarama
    • Jean Mathieu Nocquet, France, jean-mathieu.nocquet@geoazur.unice.fr
    • Michael Pearlman, USA, mpearlman@cfa.harvard. edu
    • Robert Reilinger, USA, reilinge@erl.mit.edu
    • Fabio Rocca, Italy, rocca@elet.polimi.it
    • Wim Spakman, The Netherlands wims@geo.uu.nl
    • Seth Stein, USA, seth@earth.northwestern. edu
    • Surija Tatevian, Russia, statev@inasan.ru
    • Tonie van Dam, Luxembourg, tonie.vandam@uni. lu
    • Karim Yelles, Algeria, kyelles@yahoo.fr
    • Salah M. Mahmoud, Egypt, alahm@nriag.sci.eg
    • Abdullah ArRajehi, Saudi Arabia, arrajehi@kacst. edu.sa
    • Representative of Commission 1: A. Caporali
    • Representative of Commission 3: T. van Dam