| Job title | Director |
| Section | Forecast Research Department |
| E-mail |  |
| Personal | |
| Expertise | Variational data assimilation
Application of neural networks
(Both are related with "minimization of non-linear cost function") |
| Degree | Bachelor (Science) |
| Publications |
- Koizumi, K., 1999: An Objective Method to Modify Numerical Model Forecasts with Newly Given Weather Data Using Artificial Neural Network. Weather and Forecasting, 14, 109-118
- Koizumi, K. and Y. Sato, 2004: Impact of GPS and TMI Precipitable Water Data on Mesoscale Numerical Weather Prediction Model Forecasts. J. Meteor. Soc. Japan, 82, 453-457.
- Koizumi, K., Y. Ishikawa and T. Tsuyuki, 2005: Assimilation of Precipitation Data to the JMA Mesoscale Model with a Four-dimensional Variational Method and its Impact on Precipitation Forecasts. SOLA, 1, 45-48
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