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Job title |
Head / The 2nd Lab. / Department of Observation and Data Assimilation Research |
E-mail |
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Personal |
Researchmap ORCID Web of Science
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Expertise |
Lidar (Raman, DIAL and Mie/Rayleigh) for measuring water vapor, aerosol, cloud, and ozone |
Degree |
Doctor of Science, Nagoya University |
Project |
- Development of advanced water vapor observation systems via integration of ground-based remote sensing technology and other techniques
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Publications |
- Yoshida, S., T. Sakai, T. Nagai, Y. Ikuta, T. Kato, K. Shiraishi, R. Kato, and H. Seko, 2024: Water vapor lidar observation and data assimilation for a moist low-level jet triggering a mesoscale convective system. Mon. Wea. Rev., in press.
- Hofer, J., Seifert, P., Liley, J. B., Radenz, M., Uchino, O., Morino, I., Sakai, T., Nagai, T., and Ansmann, A., 2024: Aerosol-related effects on the occurrence of heterogeneous ice formation over Lauder, New Zealand∕Aotearoa, Atmos. Chem. Phys., 24, 1265–1280.
- Sakai, T., Yoshida, S., Nagai, T., Ikuta, Y., Shoji, Y., 2023: Comparison of lower tropospheric water vapor vertical distribution measured with Raman lidar and DIAL and the impact of data assimilation in numerical weather prediction model. In: Sullivan, J.T., et al. Proceedings of the 30th International Laser Radar Conference. ILRC 2022. Springer Atmospheric Sciences.
- T. T. Ngoc Trieu, I. Morino, O. Uchino, Y. Tsutsumi, T. Izumi, T. Sakai, T. Shibata, H. Ohyama, T. Nagahama, 2023: Long-range transport of CO and aerosols from Siberian biomass burning over northern Japan during 18–20 May 2016, Environmental Pollution, 32, 12119.
- Yoshida, S., T. Sakai, T. Nagai, Y. Ikuta, Y. Shoji, H. Seko, and K. Shiraishi, 2022: Lidar observations and data assimilation of low-level moist inflows causing severe local rainfall associated with a mesoscale convective system. Mon. Wea. Rev., 150,1781-1798.
- Khaykin, S., A. Podglajen, F. Ploeger, J. Grooß, F. Tence, S. Bekki, K. Khlopenkov, K. Bedka, L. Rieger, A. Baron, S. Beekmann, B. Legras, P. Sellitto, T. Sakai, J. Barnes, O. Uchino, I. Morino, T. Nagai, R. Wing, G. Baumgarten, M. Gerding, V. Duflot, G. Payen, J. Jumelet, R. Querel, B., A. Bourassa, B. Clouser, A. Feofilov, A. Hauchecorne, and F. Ravetta, 2022: Global perturbation of stratospheric water and aerosol burden by Hunga eruption, Commun Earth Environ,3, 316.
- Tran Thi Ngoc Trieu, I. Morino, O. Uchino, Y. Tsutsumi, T. Sakai, T. Nagai, A. Yamazaki, H. Okumura, K. Arai, K. Shiomi, D. F. Pollard, and B. Liley , 2022: Influences of aerosols and thin cirrus clouds on GOSAT XCO2 and XCH4 using Total Carbon Column Observing Network, sky radiometer, and lidar data. Int. J. Remote Sensing, 43:5, 1770-1799.
- Huang, Y., J. Kok, K. Kandler, H. Lindqvist, T. Nousiainen, T. Sakai, A. Adebiyi, O. Jokinen, 2020: Climate models and remote sensing retrievals neglect substantial desert dust asphericity. Geophys. Res. Lett., 47, e2019GL086592.
- Sakai, T., S. Yoshida, T. Nagai, and Y. Shoji, 2020: Development of water vapor lidar and observational studies for heavy rain prediction. The Review of Laser Engineering, 48, 595-598 (in Japanese).
- Yoshida, S., S. Yokota, H. Seko, T. Sakai, T. Nagai, 2020: Observation System Simulation Experiments of Water Vapor Profiles Observed by Raman Lidar using LETKF System. SOLA, 16, 43-50.
- Sakai, T., Nagai, T., Izumi, T., Yoshida, S., and Shoji, Y., 2019: Automated compact mobile Raman lidar for water vapor measurement: instrument description and validation by comparison with radiosonde, GNSS, and high-resolution objective analysis. Atmos. Meas. Tech., 12, 313-326.
- Bagtasa, G., M. G. Cayetano, C-S. Yuan, O. Uchino, T. Sakai, T. Izumi, I. Morino, T. Nagai, R. C. Macatangay, V. A. Velazco, 2019: ALong-range transport of aerosols from East and Southeast Asia to northern Philippines and its direct radiative forcing effect. Atmos. Environ., 218, 11707.
- Velazco, V.A., I. Morino, O. Uchino, A. Hori, M. Kiel, B. Bukosa, N.M. Deutscher, T. Sakai, T. Nagai, G. Bagtasa, T. Izumi, Y. Yoshida, D.W.T. Griffith, 2017: TCCON Philippines: First measurement results, satellite data and model comparisons in Southeast Asia. Remote Sensing, 9, 1228.
- Uchino, O., Sakai, T., Izumi, T., Nagai, T., Morino, I., Yamazaki, A., Deushi, M., Yumimoto, K., Maki, T., Tanaka, T. Y., Akaho, T., Okumura, H., Arai, K., Nakatsuru, T., Matsunaga, T., and Yokota, T., 2017: Lidar detection of high concentrations of ozone and aerosol transported from northeastern Asia over Saga, Japan. Atmospheric Chemistry and Physics, 17,1865-1879.
- Sakai, T., O. Uchino, T. Nagai, B. Liley, I. Morino, and T. Fujimoto, 2016: Long-term variation of stratospheric aerosols observed with lidars over Tsukuba, Japan, from 1982 and Lauder, New Zealand, from 1992 to 2015. Journal of Geophysical Research-Atmosphere, 121,110283-10293.
- Walker, M., D. Venable, D. N. Whiteman, T. Sakai, 2016: Application of the lamp mapping technique for overlap function for Raman lidar systems. Applied Optics, 55,2551-2558.
- Ohyama, H., S. Kawakami, T. Tanaka, I. Morino, O. Uchino, M. Inoue, T. Sakai, T. Nagai, A. Yamazaki, A. Uchiyama, T. Fukamachi, M. Sakashita, T. Kawasaki, T. Akaho, K. Arai, and H. Okumura, 2015: Observations of XCO2 and XCH4 with ground-based high-resolution FTS at Saga, Japan, and comparisons with GOSAT products. Atmospheric Measurement Techniques, 8, 5263-5276.
- Jin, Y., K. Kai, K. Kawai, T. Nagai, T. Sakai, A. Yamazaki, A. Uchiyama, D. Batdorj, N. Sugimoto, T. Nishizawa, 2015: Ceilometer calibration for retrieval of aerosol optical properties. Journal of Quantitative Spectroscopy and Radiative Transfer, 153, 49-56.
- Sakai, T., O. Uchino, I. Morino, T. Nagai, T. Akaho, T. Kawasakai, H. Okumura, K. Arai, A. Uchiyama, A. Yamazaki, T. Matsunaga, T. Yokota, 2014: Vertical distribution and optical properties of volcanic ash from Mt. Sakurajima detected with lidar and skyradiometer over Saga. Journal of The Remote Sensing Society of Japan, 34, 197-204.
- Ridley, D. A, S. Solomon, J. E. Barnes, V. D. Burlakov, T. Deshler, S. I. Dolgii, A. B. Herber, T. Nagai, R. R. Neely III, A.V. Nevzorov, C. Ritter, T. Sakai, B. D. Santer, M. Sato, A. Schmidt, O. Uchino and J. P. Vernier, 2014: Total volcanic stratospheric aerosol optical depths and implications for global climate change. Geophysical Research Letters, 41, 7763–7769. /doi:doi:10.1002/2014GL061541
- Sakai, T., N. Orikasa, T. Nagai, M. Murakami, T. Tajiri, A. Saito, K. Yamashita, and A. Hashimoto, 2014: Balloon-borne and Raman lidar observations of Asian dust and cirrus cloud properties over Tsukuba, Japan. Journal of the Geophysical Research - Atmosphere, 119, 3295–3308. /doi:doi:10.1002/2013JD020987
- Nakamae, K., O. Uchino, I. Morino, B. Liley, T. Sakai, T. Nagai, and T. Yokota, 2014: Lidar observation of the 2011 Puyehue-Cordón Caulle volcanic aerosols at Lauder, New Zealand. Atmospheric Chemistry and Physics, 14, 12099–12108. /doi:doi:10.5194/acp-14-12099-2014
- Uchino, O., Sakai, T., Nagai, T., Morino, I., Maki, T., Deushi, M., Shibata, K., Kajino, M., Kawasaki, T., Akaho, T., Takubo, S., Okumura, H., Arai, K., Nakazato, M., Matsunaga, T., Yokota, T., Kawakami, S., Kita, K., and Sasano, Y., 2014: DIAL measurement of lower tropospheric ozone over Saga (33.24° N, 130.29° E), Japan, and comparison with a chemistry–climate model. Atmopsheric Measurement Techniques, 7, 1385-1394. /doi:doi:10.5194/amt-7-1385-2014
- Whiteman, David N., D. D. Venable, M. Walker, M. Cadirola, T. Sakai, and I. Veselovskii, 2013: Assessing the temperature dependence of narrow-band Raman water vapor lidar measurements: a practical approach. Applied Optics, 52, 5376-5384. /doi:doi:10.1364/AO.52.005376
- Sakai, T., D. N. Whiteman, F. Russo, D. D. Turner, I. Veselovskii, S. H. Melfi, T. Nagai, and Y. Mano, 2013: Liquid water cloud measurements using the Raman lidar technique: current understanding and future research needs. Journal of Atmospheric and Oceanic Technology, 30, 1337–1353.
- Sakai, T., T. Nagai, Y. Mano, Y. Zaizen, and Y. Inomata, 2012: Aerosol optical and microphysical properties as derived from collocated measurements using polarization lidar and direct sampling. Atmospheric Environment, 60, 419–427.
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Project |
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