YAMAUCHI Hiroshi

[日本語]

Job title	Head/The 3rd lab./Department of Typhoon and Severe Weather Research
E-mail	hiyamauchihiros
Personal
Expertise	Radar Meteorology
Degree
Publications	Umehara, A., S. Yoshida, S. Hayashi, S. Shimizu, N. Sakurai, H. Yamauchi, H. Inoue, N. Nagumo, Y. Shusse, 2025: Three-dimensional microphysical structure of the lower positive charge region in a thunderstorm: A case study for a supercell observed using dual-polarization radars. Atmos. Res., 319, 108006, doi.org/10.1016/j.atmosres.2025.108006. Unuma, T., H. Yamauchi, T. Kato, A. Umehara, A. Hashimoto, A. Adachi, and N. Nagumo, 2025: Characteristics of raindrop size distribution using 10-year disdrometer data in eastern Japan. Journal of the Meteorological Society of Japan, 103, 219–232. Unuma, T., H. Yamauchi, A. Umehara, and T. Kato, 2023: An Equilibrium Raindrop Size Distribution Associated with a Heavy-Rain-Producing Convective System in Japan. Science Online Letters on the Atmosphere, the Meteorological Society of Japan, 19, 150–156. Umehara, A., T. Adachi, W. Mashiko, and H.Yamauchi, 2021: Analysis of the tornadic debris signatures of the Ichihara tornado in a typhoon environment using two operational C-band dual-polarization weather radars. SOLA, 17, 196?201, doi:10.2151/sola.2021-034. Nagumo, N., A. Adachi, and H. Yamauchi, 2019: Geometrical properties of hydrometeors during the refreezing process and their effects on dual-polarized radar signals. Mon. Wea. Rev., 147, 1753–1768. Kawabata, T., T. Schwitalla, A. Adachi, H. Bauer, V. Wulfmeyer, N. Nagumo, and H. Yamauchi, 2018: Observational operators for dual polarimetric radars in variational data assimilation systems (PolRad VAR v1.0). Geosci. Model Dev., 11, 2493–2501. Yokota, S., H. Seko, M. Kunii, H. Yamauchi, and E. Sato, 2018: Improving short-term rainfall forecasts by assimilating weather radar reflectivity using additive ensemble perturbations. J. Geophys. Res. Atmos., 123, 9047–9062. Yokota, S., H. Niino, H. Seko, M. Kunii, and H. Yamauchi, 2018: Important factors for tornadogenesis as revealed by high-resolution ensemble forecasts of the Tsukuba supercell tornado of 6 May 2012 in Japan. Mon. Wea. Rev., 146, 1109–1132. Yokota, S., H. Seko, M. Kunii, H. Yamauchi, and H. Niino, 2016: The tornadic supercell on the Kanto Plain on 6 May 2012: Polarimetric radar and surface data assimilation with EnKF and ensemble-based sensitivity analysis. Mon. Wea. Rev., 144, 3133–3157. Shoji, Y., W. Mashiko, H. Yamauchi and E. Sato, 2015: Estimation of Local-Scale Precipitable Water Vapor Distribution Around Each GNSS Station Using Slant Path Delay: Evaluation of a Severe Tornado Case Using High-Resolution NHM. SOLA, 11, 31-35. Adachi, A., T. Kobayashi, and H. Yamauchi, 2015: Estimation of raindrop size distribution and rainfall rate from polarimetric radar measurements at attenuating frequency based on the self-consistency principle. J. Meteor. Soc. Japan, 93, 359-388. Shoji Y., H. Yamauchi, W. Mashiko, and E. Sato, 2014: Estimation of Local-scale Precipitable Water Vapor Distribution Around Each GNSS Station Using Slant Path Delay. SOLA, 10, 29-33. Adachi, A., Kobayashi, T., Yamauchi, H., and Onogi, S., 2013: Detection of potentially hazardous convective clouds with a dual-polarized C-band radar. Atmos. Meas. Tech., 6, 2741-2760. Adachi, A., Kobayashi, T., Yamauchi, H., and Onogi, S., 2011: Detection of convective cells with a potential to produce local heavy rainfalls by a C-band polarimetric radar. Proc. 8177, Remote Sensing of Clouds and the Atmosphere XVI, 81770P. Kobayashi, T., K. Masuda, Yamauchi, H., and A. Adachi, 2011: Physically-based simulator for measurements of precipitation with polarimetric and space-borne radars. Proc. 8177, Remote Sensing of Clouds and the Atmosphere XVI, 817710. Seko, H., H. Yamauchi, O. Suzuki and K. Saito, 2009: Estimation of Temporal Variation of Refractive Index Using C-band Doppler Radar Equipped with Magnetron Transmitter. SOLA, 5, 145-148. Yamauchi, H., O. Suzuki, and K. Akaeda, 2006: A Hybrid Multi-PRI Method to Dealias Doppler Velocities. SOLA, 2, 92-95.
Project	Research on Mechanism Elucidation of Typhoons and Severe Weather Phenomena and Development of Monitoring and Forecasting Technologies