Newsletter No.2 April-1998@

Introduction of the International Pacific Research Center (Hawaii)


There are seven researchers employed for the center as of April 1, 1998.
Their names and fields are as follows:

(Titles are omitted.)
Fumio MitsuderaOcean dynamnics
Leland JamesonCalculation schemes of models, Signal processing
Takuji WasedaAir-sea interaction, Wind wave
Tomohiko TomitaClimate variability
Toru MiyamaOcean dynamics
Amy SolomonOcean-Atmospheric dynamics
Soon - Il AnClimate dynamics

Research activites at IPRC are currently conducted by the above seven researchers, Dr. Magaard (Vice Dean of Faculty at SOEST) and Dr. Miyama (Liaison Officer). Other researchers including two from Russia, one from China, and several from the U.S. will join us in near future. The detailed explanation of their fields will be introduced in the comming newsletters.
(Dr. Miyama, Liaison officer)




Tomohiko Tomita

My fields are global climate variations with seasonal to interdecadal time scales. The latest subjects are related with the ENSO (the El Nino / Southern Oscillation) which is considered to be a main cause of the global unusual weather, the Asian and global monsoons, and the relationship of these phenomena. I have proposed an idea of the biennial oscillation in the ENSO / monsoon system for last year, in which idea the northeast winter monsoon plays an important role to maintain the oscillation.
My target of this year is to elucidate the interannual variability of sea surface temperature in the global equatorial oceans. I will propose geographical and periodical divisions for clearer understanding of the interannual variability. It is good time for us to study global climate variations now, since two objective reanalyses, which are across the globe and span over ten years, are available from NCEP / NCAR (National Center for Environmental Prediction/National Center for Atmospheric Research) and ECMWF (European Center for Mid-term Weather Forecast). We can take advantage of high quality satellite data covering the globe and over ten years to examine the global climate variations. Data obtained from TOGA (Tropical Ocean and Global Atmosphere Program) and GAME (GEWEX Asian Monsoon Experiment Program) are also useful for the process study of global climate variations. I will fully utilize the advantages of these data for may future research.





Leland Jameson

Parallel computing offers the greatest possibility for growth in obtaining the most computations per second in scientific computations. Furthermore, very few interesting or challenging physical problems contain physical information which is uniform in scale. Certainly this includes computations of ocean currents, air-sea interaction, etc. In order to obtain the best computational result on a given generation of computers it is necessary to introduce numerical schemes which dynamically adaptive. Given the large variety of scales present, wavelets provide a very natural mechanism to guide this adaptivity. However, adaptive multiscale numerical schemes on parallel computers is a new and very challenging area of science. I am working on such implementations in order to obtain the fastest numerical results on parallel computers. Information obtained through observations must be properly analyzed in order to obtain the maximum amount of physical information present in the data. This observational information might come from buoy data, satellite data or other sources, and the quantity of data can be very large. There are many classical methods for analyzing such data, but wavelets offer a new approach. Wavelets can analyze data in ways which were not possible just a few years ago. I am considering various wavelet applications to analyze observational data. Estimating subsurface ocean activity using only data obtained from satellites is a very challenging scientific problem. I am beginning an investigation into this area.



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