Division of Global Environmental Science


Hiroyuki Kusaka: Professor

Prof. Kusaka graduated from the University of Tsukuba. He assumed his present position after a Researcher at the Central Research Institute of Electric Power Industry, long-term visiting scientist at NCAR, and as a Lecturer and Associate Professor at the Center for Computational Sciences, University of Tsukuba.
He is an expert of the micro-scale and meso-scale meteorology and climatology. Urban heat island effect, foehn pehomenon, downslope windstorms, LES modeling, and climate downscaling in Japan and Vietnam are the main themes. Cap and rotor clouds around the Mt. Fuji is also one of the research themes.

 > Member

About our group

In the Group of the Global Environmental Science, there are three faculties of Prof. Hiroshi L. Tanaka, Prof. Hiroyuki Kusaka and Asst. Prof. Mio Matsueda. There is one collaborative staff of Prof. Hiroyuki Ueda (Dept. of Life and Geoenvironmental Science) and three Researchers of Dr. Akio Yamagami, Dr. Doan Quang Van. We study global-, synoptic-, and local-scale weather and climate, using a general circulation model NICAM and a regional model WRF. Advanced technology of the super computer is used to enhance the accuracy of the prediction.

Research topics

NICAM (Non-hydrostatic ICosahedral Atmospheric Model):NICAM is the most promising  cloud resolving general circulation model, originally developed by CCSR, the University of Tokyo and by FRCGC in JAMSTEC, and recently installed at the T2K-Tsukuba and Coma systems in CCS. Using NICAM, we start investigating tropical cyclones, extra-tropical cyclones, arctic cyclones, and predicting blocking anticyclones, stratospheric sudden warming, and the Arctic Oscillation in the global atmosphere.

Fig.1 Numerical simulation of general circulation by 7km-resolution NICAM. Typhoon Sinlak and Hurricane Ike are predicted nicely in NICAM

WRF (Weather Research and Forecasting):WRF model, which is a compressible, non-hydrostatic regional model, is developed by collaboration among NCAR, NCEP, NOAA and AFWA in the USA, and is installed at the PACS-CS and T2K-Tsukuba systems in CCS. Using WRF, we start investigating heavy rain and strong wind of the meso-cyclones, urban heat island and record heat wave at Kumagaya and Tajimi. The urban climate prediction associated with global warming is the main research subject with WRF.

Fig.2 Regional climate projection by 3km-resolution WRF. Total numbers of hot summer nights are compared for 2000’ s and 2070’ s, respectively.

Web sites

General Circulation Laboratory (Japanese)

Meteorology and Climatology Laboratory