2024
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Ikawa, H., Nakai, T., Busey, R.C., Harazono, Y., Ikeda, K., Iwata, H., Nagano, H., Saito, K., Ueyama, M., Kobayashi, H. Interannual variations in spring snowmelt timing of Alaskan black spruce forests using a bulk-surface energy balance approach. Water Resour. Res., 60, e2023WR035984, 2024.
[doi: 10.1029/2023WR035984] Open Access
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Nakai, T., Lai, Y.-J. Micrometeorological estimation of wet canopy evaporation from a cloud forest in central Taiwan. Agric. For. Meteorol., 350, 109997, 2024.
[doi: 10.1016/j.agrformet.2024.109997] Open Access
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Teh, D.C.C., Levia, D.F., Nakai, T. Spatiotemporal variation of bark pH on the bole of a mature Cryptomeria japonica D. Don (Japanese cedar) tree. Trees, 38, 591–605, 2024.
[doi:10.1007/s00468-024-02498-6] [Full-text access to a view-only version]
2023
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Kobayashi, H., Kim, Y., Nakai, T., Ikawa, H., Shin, N., Noguchi, K., Yang, W., Hama, A., Matsumura, S. Ikeda, K., Suzuki, R. Ecosystem aboveground structures of an open-canopy black spruce forest in interior Alaska for ecosystem modeling. Polar Data J., 7, 72–88, 2023.
[doi:10.20575/00000050] Open Access
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Nakai, T., Hiyama, T., Kotani, A., Iijima, Y., Ohta, T., Maximov, T.C. Stochastic representation of spatial variability in thaw depth in permafrost boreal forests. Permafr. Periglac. Process., 34(4), 481–493, 2023.
[doi: 10.1002/ppp.2204] Open Access
*This publication is Open Access with the support of Professor Hiyama at Nagoya University.
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Chou, L.H., Nakai, T., Liang, W.L. Differences between catchment water storage and soil water storage in a forested headwater catchment. Taiwan J. For. Sci., 38, 135–151, 2023. (in Chinese with English abstract)
[Link] Open Access
2021
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Hiyama, T., Ueyama, M., Kotani, A., Iwata, H., Nakai, T., Okamura, M., Ohta, T., Harazono, Y., Petrov, R.E., Maximov, T.C. Lessons learned from more than a decade of greenhouse gas flux measurements at boreal forests in eastern Siberia and interior Alaska. Polar Sci., 27, 100607, 2021.
[doi: 10.1016/j.polar.2020.100607] Open Access
2020
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Pastorello, G., Trotta, C., Canfora, E., et al. (Nakai, T. is the 192nd author among 287) The FLUXNET2015 dataset and the ONEFlux processing pipeline for eddy covariance data. Sci. Data, 7, 225, 2020.
[doi: 10.1038/s41597-020-0534-3] Open Access
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Nakai, T., Hiyama, T., Petrov, R.E., Kotani, A., Ohta, T., Maximov, T.C. Application of an open-path eddy covariance methane flux measurement system to a larch forest in eastern Siberia. Agric. For. Meteorol., 282–283, 107860, 2020.
[doi: 10.1016/j.agrformet.2019.107860]
2018
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Nagai, S., Akitsu, T., Saitoh, T.M., Busey, R.C., Fukuzawa, K., Honda, Y., Ichie, T., Ide, R., Ikawa, H., Iwasaki, A., Iwao, K., Kajiwara, K., Kang, S., Kim, Y., Khoon, K.L, Kononov, A.V., Kosugi, Y., Maeda, T., Mamiya, W., Matsuoka, M., Maximov, T.C., Menzel, A., Miura, T., Mizunuma, T., Morozumi, T., Motohka, T., Muraoka, H., Nagano, H., Nakai, T., Nakaji, T., Oguma, H., Ohta, T., Ono, K., Pungga, R.A.S., Petrov, R.E., Sakai, R., Schunk, C., Sekikawa, S., Shakhmatov, R., Son, Y., Sugimoto, A., Suzuki, R., Takagi, K., Takanashi, S., Tei, S., Tsuchida, S., Yamamoto, H., Yamasaki, E., Yamashita, M., Yoon, T.K., Yoshida, T., Yoshimura, M., Yoshitake, S., Wilkinson, M., Wingate, L., Nasahara, K.N. 8 million phenological and sky images from 29 ecosystems from the Arctic to the tropics: the Phenological Eyes Network. Ecol. Res., 33, 1091–1092, 2018.
[doi: 10.1007/s11284-018-1633-x]
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Toda, M., Nakai, T., Kodama, Y., Hara, T. Using digital cover photography to track the canopy recovery process following a typhoon disturbance in a cool-temperate deciduous forest. Can. J. For. Res., 48, 740–748, 2018.
[doi: 10.1139/cjfr-2018-0005]
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Nagano, H., Ikawa, H., Nakai, T., Matsushima-Yashima, M., Kobayashi, H., Kim, Y., Suzuki, R. Extremely dry environment down-regulates nighttime respiration of a black spruce forest in Interior Alaska. Agric. For. Meteorol., 249, 297–309, 2018.
[doi: 10.1016/j.agrformet.2017.11.001]
2016
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Ueyama, M., Tahara, N., Iwata, H., Euskirchen, E.S., Ikawa, H., Kobayashi, H., Nagano, H., Nakai, T., Harazono, Y. Optimization of a biochemical model with eddy covariance measurements in black spruce forests of Alaska for estimating CO2 fertilization effects. Agric. For. Meteorol., 222, 98–111, 2016.
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Ghannam, K., Nakai, T., Paschalis, A., Oishi, A.C., Kotani, A., Igarashi, Y., Kumagai, T., Katul, G. Persistence and memory timescales in root-zone soil moisture dynamics. Water Resour. Res., 52, 1427–1445, 2016.
[doi: 10.1002/2015WR017983]
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Iida, S., Ohta, T., Matsumoto, K., Nakai, T., Kononov, A.V., Maximov, T.C., van der Molen, M.K., Dolman, A.J., Yabuki, H. Year-to-year differences in evapotranspiration from understory vegetation and whole ecosystem in an eastern Siberian larch forest. J. Jpn. Assoc. Hydrol. Sci., 45(4), 109–121, 2016. (in Japanese with English abstract)
[doi: 10.4145/jahs.45.109] Open Access
2015
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Ikawa, H., Nakai, T., Busey, R.C., Kim, Y., Kobayashi, H., Nagai, S., Ueyama, M., Saito, K., Nagano, H., Suzuki, R., Hinzman, L. Understory CO2, sensible heat, and latent heat fluxes in a black spruce forest in interior Alaska. Agric. For. Meteorol., 214–215, 80–90, 2015.
[doi: 10.1016/j.agrformet.2015.08.247]
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Harazono, Y., Iwata, H., Sakabe, A., Ueyama, M., Takahashi, K., Nagano, H., Nakai, T., Kosugi, Y. Effects of water vapor dilution on trace gas flux, and practical correction methods. J. Agric. Meteorol., 71, 65–76, 2015.
[doi: 10.2480/agrmet.D-14-00003] Open Access
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Kim, W., Miyata, A., Ashraf, A., Maruyama, A., Chidthaisong, A., Jaikaeo, C., Komori, D., Ikoma, E., Sakurai, G., Seoh, H, Son, I., Cho, J., Kim, J., Ono, K., Nusit, K., Moon, K., Mano, M., Yokozawa, M., Baten, M.A., Sanwangsri, M., Toda, M., Chaun, N., Polsan, P., Yonemura, S., Kim, S., Miyazaki, S., Kanae, S., Phonkasi, S., Kammales, S., Takimoto, T., Nakai, T., Iizumi, T., Surapipith, V., Sonklin, W., Lee, Y., Inoue, Y., Kim, Y., Oki, T. FluxPro as a realtime monitoring and surveilling system for eddy covariance flux measurement. J. Agric. Meteorol., 71, 32–50, 2015.
[doi: 10.2480/agrmet.D-14-00034] Open Access
2014
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Nakai, T., Katul, G.G., Kotani, A., Igarashi, Y., Ohta, T., Suzuki, M., Kumagai, T. Radiative and precipitation controls on root zone soil moisture spectra. Geophys. Res. Lett., 41, 7546–7554, 2014.
[doi: 10.1002/2014GL061745]
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Ueyama, M., Ichii, K., Iwata, H., Euskirchen, E.S., Zona, D., Rocha, A.V., Harazono, Y., Iwama, C., Nakai, T., Oechel, W.C. Change in surface energy balance in Alaska due to fire and spring warming, based on upscaling eddy covariance measurements. J. Geophys. Res. Biogeosci., 119, 1947–1969, 2014.
[doi: 10.1002/2014JG002717]
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Nakai, T., Iwata, H., Harazono, Y., Ueyama, M. An inter-comparison between Gill and Campbell sonic anemometers. Agric. For. Meteorol., 195–196, 123–131, 2014.
[doi: 10.1016/j.agrformet.2014.05.005]
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Kobayashi, H., Suzuki, R., Nagai, S., Nakai, T., Kim, Y. Spatial scale and landscape heterogeneity effects on FAPAR in an open-canopy black spruce forest in interior Alaska. IEEE Trans. Geosci. Remote Sens. Lett., 11, 564–568, 2014.
[doi: 10.1109/LGRS.2013.2278426] Open Access
2013
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Ueyama, M., Ichii, K., Iwata, H., Euskirchen, E.S., Zona, D., Rocha, A.V., Harazono, Y., Iwama, C., Nakai, T., Oechel, W.C. Upscaling terrestrial carbon dioxide fluxes in Alaska with satellite remote sensing and support vector regression. J. Geophys. Res. Biogeosci., 118(3), 1266–1281, 2013.
[doi: 10.1002/jgrg.20095]
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Kataoka, R., Miyoshi, Y., Shigematsu, K., Hampton, D., Mori, Y., Kubo, T., Yamashita, A., Tanaka, M., Takahei, T., Nakai, T., Miyahara, H., Shiokawa, K. Stereoscopic determination of all-sky altitude map of aurora using two ground-based Nikon DSLR cameras. Ann. Geophys., 31, 1543–1548, 2013.
[doi: 10.5194/angeo-31-1543-2013] Open Access
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Yamazaki, T., Kato, K., Ito, T., Nakai, T., Matsumoto, K., Miki, N., Park, H., Ohta, T. A common stomatal parameter set used to simulate the energy and water balance over boreal and temperate forests. J. Meteorol. Soc. Jpn., 91, 273–285, 2013.
[doi: 10.2151/jmsj.2013-303] Open Access
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Nakai, T., Kim, Y., Busey, R.C., Suzuki, R., Nagai, S., Kobayashi, H., Park, H., Sugiura, K., Ito, A. Characteristics of evapotranspiration from a permafrost black spruce forest in interior Alaska. Polar Sci., 7, 136–148, 2013.
[doi: 10.1016/j.polar.2013.03.003] Open Access
*This publication is Open Access, thanks to the support of Keith B. Mather Library, Geophysical Institute, UAF.
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Park, H., Walsh, J.E., Kim, Y., Nakai, T., Ohata, T. The role of declining Arctic sea ice in recent decreasing terrestrial Arctic snow depths. Polar Sci., 7, 174–187, 2013.
[doi: 10.1016/j.polar.2012.10.002]
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Nagai, S., Nakai, T., Saitoh, T.M., Busey, R.C., Kobayashi, H., Suzuki, R., Muraoka, H., Kim, Y. Seasonal changes in camera-based indices from an open canopy black spruce forest in Alaska, and comparison with indices from a closed canopy evergreen coniferous forest in Japan. Polar Sci., 7, 125–135, 2013.
[doi: 10.1016/j.polar.2012.12.001]
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Sugiura, K., Nagai, S., Nakai, T., Suzuki, R. Application of time-lapse digital imagery for ground-truth verification of satellite indices in the boreal forests of Alaska. Polar Sci., 7, 149–161, 2013.
[doi: 10.1016/j.polar.2013.02.003]
2012
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Nakai, T. and Shimoyama, K. Ultrasonic anemometer angle of attack errors under turbulent conditions. Agric. For. Meteorol.,162–163, 14–26, 2012.
[doi: 10.1016/j.agrformet.2012.04.004] Open Access
*This publication is Open Access, thanks to the support of Keith B. Mather Library, Geophysical Institute, UAF.
*This correction has been incorporated in the following flux calculation software.
> Flux Calculator (JapanFlux; Ueyama et al.(2012))
> EddyPro (LI-COR)
> Alteddy (Alterra - Wageningen UR)
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Burba, G., Schmidt, A., Scott, R.L., Nakai, T., Kathilankal, J., Fratini, G., Hanson, C., Law, B., McDermitt, D., Eckles, R., Furtaw, M., Velgersdyk, M. Calculating CO2 and H2O eddy covariance fluxes from an enclosed gas analyzer using an instantaneous mixing ratio. Glob. Change Biol., 18, 385–399, 2012.
[doi: 10.1111/j.1365-2486.2011.02536.x] Open Access
2011
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Nakai, T., Iwata, H., Harazono, Y. Importance of mixing ratio for a long-term CO2 flux measurement with a closed-path system. Tellus B, 63, 302–308, 2011.
[doi: 10.1111/j.1600-0889.2011.00538.x] Open Access
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Suzuki, K., Kodama, Y., Nakai, T., Liston, G. E., Yamamoto, K., Ohata, T., Ishii, Y., Sumida, A., Hara, T., Ohta, T. Impact of land-use changes in a forested region with heavy snowfall in Hokkaido, Japan. Hydrol. Sci. J., 56, 443–467, 2011.
[doi: 10.1080/02626667.2011.565008]
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Toda, M., Kolari, P., Nakai, T., Kodama, Y., Shibata, H., Yoshida, T., Uemura, S., Sumida, A., Kato, K., Ono, K., Hara, T. Photosynthetic recovery of foliage after wind disturbance activates ecosystem CO2 uptake in cool-temperate forests of northern Japan. J. Geophys. Res., 116, G02006, doi:10.1029/2010JG001611, 2011.
[doi: 10.1029/2010JG001611]
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Xue, B.-L., Kumagai, T., Iida, S., Nakai, T., Matsumoto, K., Komatsu, H., Otsuki, K., Ohta, T. Influences of canopy structure and physiological traits on flux partitioning between understory and overstory in an eastern Siberian boreal larch forest. Ecol. Mod., 222, 1479–1490, 2011.
[doi: 10.1016/j.ecolmodel.2011.01.021]
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Toda, M., Takata, K., Nishimura, N., Yamada, M., Miki, N., Nakai, T., Kodama, Y., Uemura, S., Watanabe, T., Sumida, A., Hara, T. Simulating seasonal and inter-annual variations in energy and carbon exchanges and forest dynamics using a process-based atmosphere-vegetation dynamics model. Ecol. Res., 26, 105–121, 2011.
[doi: 10.1007/s11284-010-0763-6]
2010
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Nakai, T., Sumida, A., Kodama, Y., Hara, T., Ohta, T. A comparison between various definitions of forest stand height and aerodynamic canopy height. Agric. For. Meteorol., 150, 1225–1233, 2010.
[doi: 10.1016/j.agrformet.2010.05.005]
2009
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Sumida, A., Nakai, T., Yamada, M., Ono, K., Uemura, S., Hara, T. Ground-based estimation of leaf area index and vertical distribution of leaf area density in Betula ermanii forest. Silva Fennica, 43, 799–816, 2009.
[doi: 10.14214/sf.174] Open Access
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Iida, S., Ohta, T., Matsumoto, K,. Nakai, T., Kononov, A.V., Maximov, T.C., van der Molen, M.K., Dolman, H., Tanaka, H., Yabuki, H. Evapotranspiration from understory vegetation in an eastern Siberian boreal larch forest. Agric. For. Meteorol.,149, 1129–1139, 2009.
[doi: 10.1016/j.agrformet.2009.02.003]
2008
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Nakai, T., Sumida, A., Daikoku, K., Matsumoto, K., van der Molen, M.K., Kodama, Y., Kononov, A.V., Maximov, T.C., Dolman, A.J., Yabuki, H., Hara, T., Ohta, T. Parameterisation of aerodynamic roughness over boreal, cool- and warm-temperate forests. Agric. For. Meteorol., 148, 1916–1925, 2008.
[doi: 10.1016/j.agrformet.2008.03.009] [Download a revised personal version of the final text from HUSCAP]
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Matsumoto, K., Ohta, T., Nakai, T., Kuwada, T., Daikoku, K., Iida, S., Yabuki, H., Kononov, A.V., van der Molen, M.K., Kodama, Y., Maximov, T.C., Dolman, A.J., Hattori, S. Responses of surface conductance to forest environments in the Far East. Agric. For. Meteorol., 148, 1926–1940, 2008.
[doi: 10.1016/j.agrformet.2008.09.009]
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Ohta, T., Maximov, T.C., Dolman, A.J., Nakai, T., van der Molen, M.K., Kononov, A.V., Maximov, A.P., Hiyama, T., Iijima, Y., Moors, E.J., Tanaka, H., Toba, T., Yabuki, H. Interannual variation of water balance and summer evapotranspiration in an eastern Siberian larch forest over a 7-year period (1998–2006). Agric. For. Meteorol., 148, 1941–1953, 2008.
[doi: 10.1016/j.agrformet.2008.04.012]
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Matsumoto, K., Ohta, T., Nakai, T., Kuwada, T., Daikoku, K., Iida, S., Yabuki, H., Kononov, A.V., van der Molen, M.K., Kodama, Y., Maximov, T.C., Dolman, A.J., Hattori, S. Energy consumption and evapotranspiration at several boreal and temperate forests in the Far East. Agric. For. Meteorol., 148, 1978–1989, 2008.
[doi: 10.1016/j.agrformet.2008.09.008]
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Nakai, T., Sumida, A., Matsumoto, K., Daikoku, K., Iida, S., Park, H., Miyahara, M., Kodama, Y., Kononov, A.V., Maximov, T.C., Yabuki, H., Hara, T., Ohta, T. Aerodynamic scaling for estimating the mean height of dense canopies. Boundary-Layer Meteorol., 128, 423–443, 2008.
[doi: 10.1007/s10546-008-9299-5] [Download a revised personal version of the final text from HUSCAP]
2006
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Nakai, T., van der Molen, M.K., Gash, J.H.C., Kodama, Y. Correction of sonic anemometer angle of attack errors. Agric. For. Meteorol., 136, 19–30, 2006.
[doi: 10.1016/j.agrformet.2006.01.006] [Download a revised personal version of the final text from HUSCAP]
*This correction has been integrated into the following flux calculation softwares.
> Eddy Covariance Community software (ECO2S) (FLUXNET/CarboEurope)
> EddyPro (LI-COR)
2003
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Nakai, T., Urano, S., Sato, T., Hirano, T. Evaluation of sensible heat advection between canopies with different plant heights. J. Agric. Meteorol., 59, 155–164, 2003. (in Japanese with English abstract)
[doi: 10.2480/agrmet.59.155 ] Open Access
Non-refereed papers
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Sugiura, K., Suzuki, R., Nakai, T., Busey, B., Hinzman, L., Park, H., Kim, Y., Nagai, S., Saito, K., Cherry, J., Ito, A., Ohata, T., Walsh, J. Supersite as a common platform for multi-observations in Alaska for a collaborative framework between JAMSTEC and IARC. JAMSTEC Rep. Res. Dev., 12, 61–69, 2011.
[PDF] Open Access
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Urano, S., Okada, K., Yabe, K., Kawauchi, K., Takahashi, N., Nakai, T., Yazaki, T., Hirano, T., Ishikawa, N., Hinzman, L. Runoff characteristics of north-and south-facing slope in the Caribou Poker Creek Research Watershed, interior Alaska. Tohoku Geophys. J., 36(4), 466–470, 2003.
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Nakai, T., Kuwada, T., Kodama, Y., Ohta, T., Maximov, T.C. Comparison of aerodynamic characteristics among boreal, cool-temperate and warm-temperate forests. J. Agric. Meteorol., 60(5), 689–692, 2005.
[doi: 10.2480/agrmet.689] Open Access
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Machimura, T., Nakai, T., Okada, K., Tanaka, Y., Urano, S., Horiguchi, I. Comparison of evapotranspiration variation among different vegetative canopies using `decoupling' theory. J. Agric. Meteorol., 52(5), 497–500, 1997.
[doi: 10.2480/agrmet.52.497] Open Access
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Tanaka, Y., Machimura, T., Okada, K., Nakai, T. Seasonal variations in the turbulence spectra above and within a deciduous forest. J. Agric. Meteorol., 52(5), 509–512, 1997.
[doi: 10.2480/agrmet.52.509] Open Access