Researcher Information

HONDA Takumi

Specially Appointed Assistant Professor

Exploring future numerical weather prediction

Department of Earth and Planetary Sciences, Research Field of Hokkaido Weather Forecast and Technology Development


Development of an advanced data-assimilation method for numerical weather prediction and understanding the predictability of weather phenomena

FieldData assimilation, Meteorology
KeywordData assimilation, Numerical weather prediction, Meteorological satellite, Weather radar, Predictability

Introduction of Research

To improve the accuracy of numerical weather prediction (NWP), it is essential to obtain accurate initial conditions assimilating available observations. Recently, new observations and larger computing resources become available. To take full advantage of these innovations, I am exploring an advanced data-assimilation method, which could be beneficial for future NWP. My research interest also includes atmospheric dynamics such as predictability.

Representative Achievements

Advantage of 30-s-updating numerical weather prediction with a phased-array weather radar over operational nowcast for a convective precipitation system,
Honda, T., Amemiya, A., Otsuka, S., Taylor, J., Maejima, Y., Nishizawa, S., Yamaura, T., Sueki, K., Tomita, H., and Miyoshi, T., 2022, Geophys. Res. Let.
Potential impacts of lightning flash observations on numerical weather prediction with explicit lightning processes,
Honda, T., Sato, Y., and Miyoshi, T., 2022, J. Geophys. Res. Atmos., 126, e2021JD034611.
Assimilation of Himawari-8 all-sky radiances every 10 minutes: Impact on precipitation and flood risk prediction,
Honda, T., Kotsuki, S., Lien, G.-Y., Maejima, Y., Okamoto, K., and Miyoshi, T., 2018, J. Geophys. Res. Atmos., 123, 965–976.
Assimilating all-sky Himawari-8 satellite infrared radiances: A case of Typhoon Soudelor (2015),
Honda, T., Miyoshi, T., Lien, G.-Y., Nishizawa, S., Yoshida, R., Adachi, S. A., Terasaki, K., Okamoto, K., Tomita, H., and Bessho, K., 2018, Mon. Wea. Rev., 146, 213–229.
A possible mechanism of tornadogenesis associated with the interaction between a supercell and an outflow Boundary without horizontal shear,
Honda, T. and Kawano, T., 2016, J. Atmos. Sci., 73, 1273–1292.
Self Introduction

I was born in Nagasaki. As a graduate student, I investigated tornadogenesis at Kyushu University, Fukuoka, Japan. After finishing the Ph.D. course, I moved to Kobe and started investigating data assimilation for regional-scale weather prediction.

Academic background2010 B. S., School of Science, Kyushu University
2012 M. S., Graduate School of Science, Kyushu University
2015 Ph.D., Graduate School of Science, Kyushu University
2015 Postdoctoral Researcher, RIKEN Center for Computational Science
2020 Special Postdoctoral Researcher, RIKEN Center for Computational Science
2022- Assistant Professor Faculty of Science, Hokkaido University
Affiliated academic societyJapan Meteorological Society, Japan Geoscience Union
Room addressScience Building 8, 8-313