6.5
(Invited Talk) Toward forecasting and understanding the mechanisms of extremes in urban areas
Keiko Takahashi, JAMSTEC, Kanazawa-ku, Yokohama, Japan; and M. Ohdaira, R. Onishi, and T. Sugimura
Weather and climate in coastal-urban areas are influenced by complex
interactions among the ocean, atmosphere and the thermal environment in
urban areas. Extreme weather in urban areas such as local heavy rain in
summer season seems to be influenced by heat content in urban areas.
However, it is still unclear whether urban heat content is one of the
main reasons for extremes in cities.
The Multi-Scale Simulator for the Geoenvironment (MSSG), which is a
coupled non-hydrostatic atmosphere-ocean model, has been developed at
the Earth Simulator Center. MSSG can resolve the building scale and
compute three dimensional flow along an urban building canyon. MSSG-A,
which is an atmospheric component of MSSG, is characterized as a
non-hydrostatic model and introduces LES for the turbulence model.
In this presentation, as a first step to understanding the mechanisms of
local extremes in urban areas, especially the Tokyo region, preliminary
results from high resolution simulations on the Earth Simulator will be
demonstrated and near future research plans will be introduced.
.Session 6, Coastal ocean and atmosphere forecasting systems—II
Wednesday, 12 September 2007, 1:30 PM-3:00 PM, Boardroom
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