Computational Climate Science Research Team

Out team provides a basic library for climate studies, which is highly tuned on K computer. It is well known that difference of numerical method in each of climate models leads difference of model results. This uncertainty is caused not only by the used numerical methods themselves but also by the combination of numerical schemes of each component. The construction of the basic library that covers major numerical schemes used generally in the climate simulation makes the intercomparison of numerical methods very easy. By using it, we can investigate what mechanism dose cause such uncertainties and where the main error does come from. For this purpose, our team cooperates with the computer science teams in AICS and the product of this research and development contributes the other science fields, especially, many fields which use computational fluid dynamics.

Research Subjects

• Research of the methodology for simulations in the computational meteorology and climate science

Publications

1. Niwa,Y., Tomita,H., Satoh,M., Imasu,R.:
   "A Three-Dimensional Icosahedral Grid Advection Scheme Preserving monotonicity and Consistency with Continuity for Atmospheric Tracer Transport. "
   J. Meteor. Soc. Japan, 89, 255-268 (2011)
2. Yamada, Y., K. Oouchi, M. Satoh, H. Tomita and W. Yanase:
   "Projection of changes in tropical cyclone activity and cloud height due to greenhouse warming: global cloud-system-resolving approach."
   Geophys. Res. Lett., 37, L07709, doi:10.1029/2010GL042518. (2010)
3. Tomita, H.:
   "Analysis of spurious surface temperature at the atmosphere-land interface and a new method to solve the surface energy balance equation."
   J. Hydrometeorol, 10, 833-844 (2009)
4. Tomita, H.:
   "A stretched grid on a sphere by new grid transformation."
   J. Meteorol.Soc.Japan, 86A, 107-119 (2008)
5. Tomita, H, K.Goto, and M .Satoh:
   "A new approach of atmospheric general circulation model --- Global cloud resolving model NICAM and its computational performance ---"
   SIAM J. Sci. Comput. 30, 2755-2776 (2008)
6. Miura, H., M. Satoh, H. Tomita, A. T. Noda, T. Nasuno, and S .Iga:
   "A short-duration global cloud-resolving simulation under a realistic land and sea distribution"
   Geophys. Res. Lett., 34, L02804, doi:10.1029/2006GL027448 (2007)
7. Tomita, H, H. Miura, S. Iga, T. Nasuno, and M. Satoh:
   "A global cloud-resolving simulation: Preliminary results from an aqua planet experiment."
   Geophys. Res. Lett., 32, L08805, doi:10.1029/2005GL022459 (2005)
8. Tomita, H and M. Satoh:
   "A New Dynamical Framework of Nonhydrostatic Global Model Using the Icosahedral Grid."
   Fluid Dyn. Res., 34, 357-400, (2004)
9. Tomita, H, M. Tsugawa, M. Satoh, and K. Goto:
   "Shallow Water Model on a Modified Icosahedral Geodesic Grid by Using Spring Dynamics"
   .J. Comput. Phys., 174, 579-613 (2001)
10. Tomita, H and K. Abe:
    "Numerical simulation of pattern formation in the Benard Marangoni convection."
    Phys. Fluids, 12, 1389-1400 (2000)