RESEARCHERS FRONTIER Newsletter No.10 Mar.2000 

Introduction of the researchers

Dr. Nobuhiko Endoh
Hydrological Cycle Research Program
I started my new post in the Hydrological Cycle Research Program on October 1 , 1998 .I belong to the large- scale Hydrological Cycle and Processes Group, and I have been working on the analysis of the heat- water cycle in the Tibetan Plateau and its surrounding area.

 It is a well- known fact that the existence of the Tibetan Plateau is important in formulating- maintaining the monsoon circulation,and still today,there remain many matters to resolve about the heat- water cycle on the Tibetan Plateau.From the project observations of CREQ in 1993 and of GAME/TIBET in 1996 ,I have been able to clarify the fact that energy dissipations are made,not only for atmospheric heating by sensible heat flux in the spring,but also for melting frozen soil near the surface.I also made clear that energy is spent on water evaporating from the ground surface during the monsoon season.In addition,we observed perceptible water vapor decreases during daylight hours,and at night,the vapor increases and accumulates in the lower layer of the atmosphere.By analyzing the existing data, the results suggest the possibility that those phenomena are related to water vapor transport by thermal local- circulation.

 Among the great tasks of understanding the seasonal progression of the Asian monsoon,as well as the heat- water cycle within the Tibetan Plateau,I would like to study interactions between the Tibetan Plateau and tropical circulation/mid and high latitude westerly circulation.

Mr. Jun Yoshimura
Global Warming Research Program
I have been participating in the Global Warming Research Program since last April.Before then,I had been studying tropical cyclones (TCs)and El Nino in MRI,using climate models.My present theme,which I have been engaged since I was in MRI,is how frequency and intensity of TCs (including typhoons)would change due to global warming.So far,all results of our greenhouse- warming experiments with high- resolution numerical models have shown significant reduction in global frequency of TCs.But regional TC frequency might increase in some areas,and there is possibility that the maximum intensity or rainfall associated with TCs would increase on a global scale.In the near future we would make numerical experiments with much higher resolution (using the Earth Simulator),and I have much interest in whether we obtain the same,or a different kind result from such experiments.

 In this research field there are many tasks to solve,and I am excited by the expectation that we could understand many more things by making various kinds of numerical experiments (of course observed data are also necessary).

 I would like to contribute to the society through my work.The reason I chose my present research theme is that I intend to urge a great turnabout of today's civilization toward mitigation of the global warming by depicting an image of (even in part)what the earth would become after global warming.Sometimes I also take part in environmental NGO activities as a volunteer.In the distant future,I dream that I will have a research theme depicting an image of a great turnabout of today's civilization from an economic point of view.

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