The First Workshop on The Asia-Pacific Space Geodynamics Program

Shanghai, P. R. China
May 13 - 17, 1996

    The First Workshop on the Asia-Pacific Space Geodynamics (APSG) Project was held, according to the IAG Resolution #4 of 1995, at the Shanghai Convention Center of Chinese Academy of Sciences, Shanghai, China during May 13-17, 1996. Twenty-nine participants from United States, Germany, Japan, Australia, Russia, South Korea, Indonesia and Hong Kong Region as well as more than 36 participants from different institutions of China took part in this meeting. Interest in the workshop was expressed by groups in North Korea, Pakistan, New Zealand and the Philippines, but they were not able to participate.

  The Program Organizing Committee of the Workshop was composed of Shuhua Ye (Chairman, China), Miriam Baltuck (USA), Masao Ishihara (Japan), John Manning (Australia) and V. N. Strakhov (Russia), and the Local Organizing Committee consisted of Cheng Huang (Chairman), Chenqi Fu, Detong Tan and Fumin Yang from Shanghai Observatory. An agenda of Scientific Program is attached.

   The main function of the APSG Project is to unite forces of the Asia-Pacific area to make cooperative research on crustal plate motion, crustal deformation and sea-level change in this area, and to enrich our understandings of geosciences and environmental sciences in this area. Furthermore, the APSG Project is aiming at the study of serious nature hazards in this area, especially at the prediction of earthquake, volcanic eruption, sea immersion and at reducing their hazards. The First Workshop formally initiated the APSG Project, consulted about organization of research components and communicated current related projects underway and new emerging activities and the newest contributions from individual institutions of the involved countries on the fields of applying space techniques to crustal deformation, variations of sea level, volcanic activities.

   More than forty reports were received during the meeting, and the necessity and possibility of the scientific cooperation between participants was discussed in details. The general research objectives of the APSG Project, the special research groups, the technique working groups and the organization structure were discussed in this meeting. Therefore, A rough project document was drafted according to the primary consideration coming from participants. During the meeting, the Local Organizing Committee invited the participants to visit Sheshan observation station, Shanghai Observatory, introducing the development of space techniques in China.

   All participants recognized the following facts: a) the Asia-Pacific Region is the most active in global plate motion; b) it is in the convergence zone of five plates: Eurasian, North American, Pacific, Philippine and Indo-Australian Plates; c) it possesses complicated geological structures represented by the Qing-Zang Plateau (Tibet and Qinghai region) named the " geological window " for its typical mountain-building movement and the Circum-Pacific island-arc and sea trench system; d) it is in high frequency various severe natural hazard zone: frequent earthquakes, volcanic activity, tropical storm, land slides, flooding and sea-level variation; e) it is of dense population with rapidly developing economy and of rich natural resource. Therefore this area is the most appropriate and the most urgent area for the space geodynamics study.

   The APSG Project will promote scientific exchange and cooperation with international or regional projects, such as the Dynamics Of the Solid Earth (DOSE), WEGENER, WPLTN to raise the scientific research level.

   The Workshop discussed and approved the general objectives of study, which are:

  1. to measure and monitor, using space and advanced terrestrial techniques, the relative deformations at and around the plate tectonic boundaries of the region;
  2. to study the evolution of the crustal motions for the tectonic island-arc system in the Western Pacific boundary zone and the mountain-building zones of the Tibetan Plateau and SE-Asia and their dynamic mechanism;
  3. to measure and monitor sea-level change in the Asia-Pacific area, to study the characteristics and causes of the fluctuations of the global ocean surface as well as the mechanisms leading to its variation;
  4. to investigate the variation of the spatial motion of the solid Earth as a whole and the mass motions of the Earth, ocean, atmosphere system and the associated dynamic relations;
  5. to investigate the occurrence and categories of nature hazards in the region as well as their relation to various Earth motions, and to provide basic scientific information which could lead to the prediction of the occurrence of certain natural hazards.

   The Workshop also discussed organization structure and its function. It was generally agreed by the attendants at the meeting that APSG would be structured into activities based on scientific questions and geographic regions. Dr. Peter Wilson, the former President of WEGENER, recommended the WEGENER's model to APSG. Prof. Ye Shuhua presented a preliminary APSG organization structure. The tentative framework of the structure would be the following.

   The APSG Program Participant Committee, made up of representatives from all participating institutions, is the highest division for policy decision, which includes a APSG Management Board to assess the contents and achievements of available research objects and to establish the plan of development for these objects according to the requirements of science and society. The conclusions reached by the Board will be subject to review and iteration with the participants. The Board consists of representatives from the key participating countries, of which the Chairman is elected from its members. The Board involves a Program Secretariat, a Technical Coordinate Center (TCC) and a Data Processing and Archiving Center (DPAC). The Secretariat will provide the operational interface between the Management Board and the Special Research Groups(SRGs). It will assist in SRG's planning and will facilitate communications and arrangements between the SRGs and the measurement techniques of the TCC. The Secretariat will promote communications with the DPAC and with international bodies, such as the CSTG, the IERS and IGS. A member of the Management Board will head the Secretariat. The TCC will consist of five Technique Working Groups (TWGs), with a Technique Coordinator appointed by the Management Board. The TCC will provide the interface between the designated SRG and the established measurement technique. The TCC is intended as a means of communication and coordination for the APSG and is not intended to supplant functions routinely performed by established international bodies such as the CSTG and the IGS. The DPAC will be made up of Data Center (DC) and Analysis Center (AC)1, AC2, and so on. The responsibilities of DPAC will be to organize and coordinate the DC and AC activities, to synthesize and analyze data documents and information from the DC and each AC. The DC will collect the measurement data from each TWG and will transmit and archive data in internationally accepted formats. Many of the stations participating in the APSG will also be participants in international network activities and will continue to provide their data routinely to the international network. Any group participating in the APSG and with the desire of becoming an AC will be one of the ACs.

   The First Workshop elected the first Management Board composed of the following People:
Ye Shuhua (China)
Miriam Baltuck (US)
Masao Ishihara (Japan)
John Manning (Australia)
V. N. Strakhov (Russia)
Uk Han (South Korea)
S. Sutisna (Indonesia)

Prof. Ye Shuhua was elected as the Chairman of the First Management Board and Shanghai was chosen as the location of the Secretariat.

   As the decision of the meeting, the APSG Project includes the following SRGs:
SRG 1:Crustal Motion and Dynamics of Qing-Zang Plateau
( Convener: Prof. Z. Ma, China );
SRG 2: Crustal Tectonic Motion of the Western Pacific Volcanic-Seismic Belt
( Conveners: Dr. Y. Bock, USA; Dr. K. Tsukahara , Japan );
SRG 3:Sea Level Variation of Asia-Pacific Region
( Convener: Dr. T.S. Murty, Australia ).

   Five TWGs and conveners were tentatively designated during the meeting:
GPS Technique Working Group ( Convener: Dr. R. Neilan, USA )
SLR Technique Working Group ( Convener: Dr. J. Manning, Australia )
VLBI Technique Working Group ( Convener: Dr. T. Yoshino, Japan )
Gravity Technique Working Group ( Convener: Prof. H. Hsu, China )
SAR Technique Working Group ( Convener: Dr. M. Baltuck, USA ).

   The conveners of every SRG and TWG will convey, by October 1, 1996, the detailed working plan to the Program Secretariat to complete the terms of reference of the APSG project, which will be sent to all participants.

The working plan should include:
Objectives - What geophysical questions do we want to answer?
Rationale - Why is it important?
Who else is working on the problem?
Required Measurements - What, Where?
What is already available ? From whom?
What else would be required? - Additional sites, upgrades, etc.
Potential sources for these additional measurements.
Participating Organizations
Timeframe
Project organization
Special data requirements, archiving, analysis, etc.
Sources of support

   The APSG Program will held its annual Workshop organized by participating countries in turn, which aims at examining the progress and achievement of research projects and to improve its plan and terms of reference.