日本財団 図書館


PACON 2002
The Ocean Century
 
Technical Program Committee
Dr. Narendra Saxena (USA): Chair
Prof. Mitsuo Takezawa (Japan): Co-Chair
Dr. H. T. Huh (Korea)
Prof. Susumu Ishii (Japan)
Dr. J. T. Juang (Taiwan)
Dr. Young C. Kim (USA)
Prof. H. D. Knauth (Germany)
Prof. Kouichi Masuda (Japan)
Dr. Koji Mitsuhashi (Japan)
Prof. Takamasa Miyazaki (Japan)
Prof. Hitoshi Murakami (Japan)
Prof. Makoto Nakamura (Japan)
Prof. Takuji Sakai (Japan)
Prof. Toshitsugu Sakou (Japan)
Prof. Toshihiko Teramoto (Japan)
Prof. Ying Wang (China)
Prof. Koichiro Yoshida (Japan)
 
GENERAL LECTURES
CLIMATE CHANGE AND GLOBAL MARINE HAZARDS
Tad Murty
 
W.F. Baird and Associates Coastal Engineers Ltd.
Ottawa, Ontario, CANADA
tmurty@baird.com
 
Even though climate change and global warming appear to be synonymous this is not the case. Climate change occurs due to natural processes of the earth's land, atmosphere and ocean components and their interactions and astronomical factors. Climate change has been occurring continuously since the atmosphere has evolved in its present form some hundreds of millions years ago, and will continue to occur for the next several billion years. If there is any human enhanced green house warming, it will simply be a part of the over all climate change phenomenon. There is a general perception that natural hazards and extreme weather events are increasing in a monotonic manner, due to human induced green house effect. There is no observational evidence to support this contention, except to suggest that global marine hazards and extreme weather events appear to increase and decrease at various times in semi-periodic and irregular cycles. The economic impact of natural disasters has increased substantially in recent times, due to increasing population, movement of people closer to the world's coast lines, increased coastal infra structure and to inflation.
 
In the popular media, climate change is always presented in terms of a global temperature increase by a degree or two in one hundred years and also followed by a millimeter or so increase in the global mean sea level per year. Indeed, climate change is very much broader than this ultra-simplistic picture and the implications of climate change from a practical engineering point of view are discussed.
 
CHALLENGE FOR THE UNKNOWN IN THE OCEAN
Hitoshi Hotta
 
Japan Marine Science and Technology Center
Yokosuka, Kanagawa, JAPAN
hottat@jamstec.go.jp
 
Structure and Movement of the Earth under the Ocean
Ocean bottom moves steady and slowly by the circulation of energy and material inside of the earth, and it causes natural hazards such as earthquake, eruption of volcanoes, tsunami. The movement of the ocean plates and its driving mechanism are very important to understand the structure and dynamic of the earth, and to predict such phenomena. However, it has not been conducted at all. In order to simulate such natural phenomena for the prediction, we should promote following activities.
a) Survey the inside of the earth up to the core using the method for detection of the artificial vibration.
b) Pick the sample of the strata by ocean bottom drilling as deep as possible.
c) Deploy many sensors in the holes drilled in the ocean plates, and connect those sensors by the cable network for the monitoring of the ocean plate movements and circulation of the energy in the earth.
 
Structure and Movement of Seawater
Since the seawater is the large reservoir of the thermal energy and the currents and circulations transport it, the balance of global environment and climate has been kept. So, for the understanding, elucidating and prediction of the global environmental change, we need to know precise and accurate, 3-dimensional time-series data on the structure and structure and movement of seawater all over the world. The trial to conquer this goal has just started. Furthermore, we need to promote following effort hereafter, because the opportunities for ocean observation and monitoring are still quite few.
a) Deployment of the mooring buoy and the subsurface floats "ARGO" in the ocean all over the world.
b) Archiving the 4-dimensional data set using the data assimilation method and the "virtual data exchange system" between institutions in the world.
c) Estimation and prediction by the high-resolution accurate simulation using adequate model and high performance computer.
 
Marine Bio Resources
Even human beings love to eat many kinds of marine bio resources from ancient period, its kinds, volume and its altemate behavior quantitatively are not elucidated yet at all. In order to prepare to against to "population explosion", we should promote following efforts.
a) Understanding of the marine eco-system quantitatively, and development accurate model of it.
b) Survey of the existence and functions of every marine living resources from sea-surface up to the bottom and in the sediment under the ocean floor.
c) Challenge to the feasibility to understand the origin of lives on the earth.
d) Understanding of an evolution process based on the bio-diversity in the ocean.
 
PROGRESS AND CHALLENGES OF COASTAL ENGINEERING
Young C. Kim
 
Department of Civil Engineering
California State University, Los Angeles
Los Angeles, California, USA
ykim@calstatela.edu
 
The term "coastal engineering" was first used in print in October 1950, at the Institute of Coastal Engineering, held in Long Beach, California, planned by Morrough P. O' Brien and Joe W. Johnson, and organized by the University of California Extension program. The development and evolution of coastal engineering in the U.S. was explained and summarized.
 
The worldwide development of coastal engineering in the last fifty years was categorized in the following three areas:
 
・ Significant Coastal Engineering Projects
・ People and Places
・ Coastal Engineering Laboratories
 
Examples of major coastal engineering projects, such as the Delta Project in the Netherlands and Kansai Offshore Airport in Japan, were highlighted. Other topics include the improved design, construction, and maintenance of breakwaters as well as the recent development of coastal structures. Shore response to coastal structure, sand bypassing at the Santa Barbara Harbor, and beach nourishment projects were identified. A few eminent international coastal engineers were cited and the development of coastal engineering laboratories in U.S.A., Europe, and Asia were discussed.
 
Future challenges of coastal engineering are in the areas of coastal disasters from coastal storms, seismic events, climate change, and shoreline change. Ocean energy extraction and conversion from the coastal water will be the predominant focus of the 21st Century. Finally, coastal zone management; balancing economic, social, and technical interests; and hazard mitigation planning and implementation, are explored.
 
GLOBAL OCEAN OBSERVATIONS FOR CLIMATE SERVICES
Sidney W. Thurston
 
NOAA Office of Global Programs
Silver Spring, Maryland, USA
Sidney.Thurston@noaa.gov
 
Central to describing, understanding, and predicting the earth's climate system is observation. The mission of the observational element of NOAA's climate services is to build and sustain a global climate observing system that will respond to the long-term requirements of the operational forecast centers, international research programs, and major scientific assessments. NOAA's climate observation program is built on the recognition that national and international partnerships are essential to success. A global observing system by definition crosses international boundaries and the potential exists for both benefits and burdens to be shared by many nations.
 
The climate observation program supports both ocean and atmospheric components, but the ocean has received the most attention to date because climate research has left ocean observing system legacies that must be transitioned to an operational framework. Today NOAA laboratories, university partners, and volunteer observing ships operate about 60% of the fledgling in-situ ocean observing system for climate. This international effort is about 25% of what will be needed over the long term.
 
Now NOAA is embarking on a comprehensive implementation plan to work with national and international partners to complete the needed global system. It will take ten years. The plan is based on the concept of extending the building blocks that have been put in place by the research programs, and on the international plan drafted by over 300 scientists from 26 nations that met in Saint Raphael, France, October 1999, at the OCEANOBS 99 Conference.
 
Recognizing that the climate observing system will evolve as knowledge increases, NOAA has defined an initial set of objectives and milestones to guide a phased implementation over the next ten years. The system is a composite of complementary networks, both in-situ and space-based, all internationally coordinated. Each network brings its unique strengths and limitations; together they build the whole. The initial milestones provide realistic targets while at the same time providing flexibility for evolution of the design as technology improves and the patterns of climate variability become clearer.







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