Established as the Water Quality Science Research Facility, Faculty of Science, Nagoya University
The Institute for Hydrospheric Sciences, Nagoya University
The Institute for Hydrospheric-Atmospheric Sciences (IHAS), Nagoya University
Hydrospheric Atmospheric Research Center (HyARC), Nagoya University
Water is essential for life. It circulates on earth, and even small fluctuations
of the water cycle may cause serious problems on human life. The fluctuation,
viz. temporal and spatial distributional variation of water, results from
multiple factors at different time and spatial scales. These include natural
factors as well from human induced changes on the earth system. The complex
nature of the multi-scale temporal and spatial variability of the water
cycles makes its understanding and prediction difficult. It is therfore
desirable, to overcome this difficulty, to conduct integrated studies of
various aspects, such as physics, biology and chemistry and/or air, land
and oceans, on the structure and variability of the multi-scale water cycles
as parts of a whole water cycle system in the earth system.
The Institute for Hydrospheric-Atmospheric Sciences (IHAS) has been established 1 April 1993
to conduct integrated studies on the structure and dynamics of the hydrosphere and atmosphere aiming
at undestanding the relationship of processes in water and material cycles in a changing earth environment.
IHAS had been appreciated by its important contribution in the coordination of national and
international joint research projects on earth enbironmental studies.
During the 8-years history of IHAS the global warming and connected environmental changes became an urgent societal issue,
and hense serious discussion on the future research strategy has been made in the IHAS.
The conclusion was to bifurcate activities of IHAS. First to concentrate on the intensive integarated research
of the water cycle which is to be conducted by a nation-wide collaborative Hydrospheric Atmospheric Research Center, HyARC.
Second to disseminate achievements of the Science of Hydrosphere and Atmosphere acquired at IHAS.
Third to conduct multidisciplinary studies on "Environmentology" in collaboration with
researchers with broad background of scienc, technology and humanities.
The conclusion was materialized with the joint efforts of many people in Nagoya University,
the Government of Japan and the Scientific Societies who supported the idea.
HyARC designed to be a national core research center to facilitate national and
international interdisciplinary cooperative studies on the global water cycles in order to reveal the
multi-scale structures of the water cycle and understand its variability.
HyARC comprises of two research divisions according to the time and spatial scales of the water cycles of interest.
The division for Regional-Scale Water Cycle Processes conducts observational research fot the variousprocesses in the
water cycles as well as development of numerical models.
The division for Global-Scale Water Cycle Variations conducts analysis of time-series data on vatiability of water
cycle systems to develop numerical models.
The target time scale ranges from seasonal to decades, and spatial scale from an observational site to ASia-West Pcific regions.
HyARC puts emphasis on biological activities on land and in the oceans.
The biological activities, maintained by water cycles, are invariably associated with material exchange between the cells abd environments,
and this is why the biota is situating at the crossover point of the water and material cycles.
Biology is considered to play key roles in large scale and long-term variability of the water cycle systems,
but little is yet known. This would be one of the challenges of the HyARC.