Research Institute for Humanity and Nature

Staff Profile

NameHIYAMA Tetsuya
AffiliationResearch Institute for Humanity and Nature
PositionAssociate Professor
Arrival day2010
Leaving the office day 
Year of Birth1967
Academic Career1986-1990: College of Natural Sciences, University of Tsukuba
1990-1995: Graduate School of Geoscience, University of Tsukuba
Professional Career1995-1995: JSPS Research Fellow, Institute of Geoscience, University of Tsukuba
1995-2001: Assist. Prof., Institute for Hydrospheric-Atmospheric Sciences, Nagoya Univ.
2001-2001: Assist. Prof., Hydrospheric Atmospheric Research Center, Nagoya Univ.
2002-2010: Assoc. Prof., Hydrospheric Atmospheric Research Center, Nagoya Univ.
2010- : Assoc. Prof., Research Institute for Humanity and Nature
Higher DegreesPh.D.(Science), University of Tsukuba, 1995
Fields of SpecializationEcohydrology, Hydrometeorology
AppealMy research interests are as follows:
1) Global Warming and the Human–Nature Dimension in Siberia
2) Changes in Forest–Permafrost–Groundwater Dynamics due to Global Warming
3) Soil – Vegetation – Climate Interactions

 

Books

【Chapters/Sections】

Hiyama, T. 2006,11 Canopy-Scale Fluxes of Heat, Water Vapor, and Carbon Dioxide in Various Terrestrial Ecosystems. Hiyama, T. (ed.) Water and Carbon Cycles in Terrestrial Ecosystems. The Textbook for Fifteenth IHP Training Course in 2005. UNESCO, IHP, Paris, France, pp.1-26.

Editing

【Editing / Co-editing】

Ohta, T., Ueno, K., Hiyama, T., Tanaka, K., Tanaka, K., and Kuraji, K. (ed.) 2007,07 Special Issue: GEWEX Asian Monsoon Experiment - Hydrological Aspects. Hydrological Processes, Vol.21, No.15. John Wiley & Sons, Chichester, West Sussex, UK, 99pp.

Hiyama, T. (ed.) 2006,11 Water and Carbon Cycles in Terrestrial Ecosystems. UNESCO, IHP, Paris, France, 238pp.

Papers

【Original Articles】

Hiyama, T., Suzuki, T., Hanamura, M., Mizuochi, H., Kambatuku, J.R., Niipele, J.N., Fujioka, Y., Ohta, T. and Iijima, M. 2014,06 Evaluation of surface water dynamics for water-food security in seasonal wetlands, north-central Namibia. IAHS Publication (in press). (reviewed).

Lu, P., Liu, Y. and Hiyama, T. 2014,01 Linking surface temperature based approaches for estimating soil heat flux with error propagation. Atmospheric and Climate Sciences 4(1):29-41. DOI:10.4236/acs.2014.41004 (reviewed).

Kurita, N., Fujiyoshi, Y., Wada, R., Nakayama, T., Matsumi, Y., Hiyama, T. and Muramoto, K. 2013,12 Isotopic variations associated with north-south displacement of the Baiu front. SOLA (Scientific Online Letters on the Atmosphere) 9:187-190. DOI:10.2151/sola.2013-042 (reviewed).

Hiyama, T., Asai, K., Kolesnikov, A.B., Gagarin, L.A. and Shepelev, V.V. 2013,09 Estimation of residence time of permafrost groundwater in the middle of the Lena River basin, eastern Siberia. Environmental Research Letters 8:035040. DOI:10.1088/1748-9326/8/3/035040 (reviewed).

Suzuki, T., Ohta, T., Hiyama, T., Izumi, Y., Mwandemele, O. and Iijima, M. 2013,08 Effects of the introduction of rice on evapotranspiration in seasonal wetlands. Hydrological Processes (accepted). DOI:10.1002/hyp.9970 (reviewed).

Hiyama, T., Ohta, T., Sugimoto, A., Yamazaki, T., Oshima, K., Yonenobu, H., Yamamoto, K., Kotani, A., Park, H., Kodama, Y., Hatta, S., Fedorov, A.N. and Maximov, T.C. 2013,07 Changes in eco-hydrological systems under recent climate change in eastern Siberia. IAHS Publication 360:155-160. (reviewed).

Fedorov, A.N., Gavriliev, P.P., Konstantinov, P.Y., Hiyama, T., Iijima, Y. and Iwahana, G. 2013,04 Estimating the water balance of a thermokarst lake in the middle of the Lena River basin, eastern Siberia. Ecohydrology. DOI:10.1002/eco.1378 (reviewed).

Yoshida, R., Sawada, M., Yamazaki, T., Ohta, T. and Hiyama, T. 2013,02 Influence of land cover change on regional water cycles in Eastern Siberia. Journal of Applied Meteorology and Climatology 52:484-497. DOI:10.1175/JAMC-D-12-043.1 (reviewed).

Li, W., Hiyama, T. and Kobayashi, N. 2013,01 Seasonal variations of the surface fluxes and surface parameters over the Loess Plateau in China. Atmospheric and Climate Sciences 3:111-120. DOI:10.4236/acs.2013.31013 (reviewed).

Brutsaert, W. and Hiyama, T. 2012,11 The determination of permafrost thawing trends from long-term streamflow measurements with an application in eastern Siberia. Journal of Geophysical Research 117(D22110). DOI:10.1029/2012JD018344 (reviewed).

Hossen, M.S., Mano, M., Miyata, A., Baten, A. and Hiyama, T. 2012,04 Surface energy partitioning and evapotranspiration over a double-cropping paddy field in Bangladesh.. Hydrological Processes 26:1311-1320. DOI:10.1002/hyp.8232 (reviewed).

Liu, Y., Hiyama, T., Yasunari, T. and Tanaka, H. 2012,02 A nonparametric approach to estimating terrestrial evaporation: Validation in eddy covariance sites. Agricultural and Forest Meteorology 157:49-59. (reviewed).

Suzuki, R., Kobayashi, H., Delbart, N., Asanuma, J. and Hiyama, T. 2011,11 NDVI responses to the forest canopy and floor from spring to summer observed by airborne spectrometer in eastern Siberia. Remote Sensing of Environment 115:3615-3624. (reviewed).

Hossen, M.S., Mano, M., Miyata, A., Baten, A. and Hiyama, T. 2011,08 Seasonality of ecosystem respiration in a double-cropping paddy field in Bangladesh. Biogeosciences Discussion 8:8693-8721. (reviewed).

Kobayashi, N. and Hiyama, T. 2011,03 Stability dependence of canopy flows over a flat larch forest. Boundary-Layer Meteorology 139:97-120. (reviewed).

Wada, R., Pearce, J.K., Nakayama, T., Matsumi, Y., Hiyama, T., Inoue, G. and Shibata, T. 2011,02 Observation of carbon and oxygen isotopic compositions of CO2 at an urban site in Nagoya using Mid-IR laser absorption spectroscopy. Atmospheric Environment 45:1168-1174. (reviewed).

Zhao, X., Liu, Y., Tanaka, H. and Hiyama, T. 2010,09 A comparison of flux variance and surface renewal methods with eddy covariance. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 3(3):345-350. (reviewed).

Awal, M.A., Ohta, T., Matsumoto, K., Toba, T., Daikoku, K., Hattori, S., Hiyama, T. and Park, H. 2010,04 Comparing the carbon sequestration capacity of temperate deciduous forests between urban and rural landscapes in central Japan. Urban Forestry & Urban Greening 9:261-270. (reviewed).

Hossen, M.S., Hiyama, T. and Tanaka, T. 2010,02 Estimation of nighttime ecosystem respiration over a paddy field in China. Biogeosciences Discussion 7:1201-1232. (reviewed).

Shinoda, T., Higuchi, A., Tsuboki, K., Hiyama, T., Tanaka, H., Endo, S., Minda, H., Uyeda, H. and Nakamura, K. 2009,12 Structure of convective circulation in the atmospheric boundary layer over the northwestern Pacific Ocean under a subtropical high. Journal of the Meteorological Society of Japan 87:979-996. (reviewed).

Abe, O., Agata, S., Morimoto, M., Abe, M., Yoshimura, K., Hiyama, T. and Yoshida, N. 2009,09 A 6.5-year continuous record of sea surface salinity and seawater isotopic composition at Harbor of Ishigaki island, southwest Japan. Isotopes in Environmental and Health Studies 45:247-258. (reviewed).

Nishikawa, M., Hiyama, T., Tsuboki, K. and Fukushima, Y. 2009,04 Numerical simulations of local circulation and cumulus generation over the Loess Plateau, China. Journal of Applied Meteorology and Climatology 48:849-862. (reviewed).

Tanaka, H., Hiyama, T., Kobayashi, N., Yabuki, H., Ishii, Y., Desyatkin, R.V., Maximov, T.C. and Ohta, T. 2008,12 Energy balance and its closure over a young larch forest in eastern Siberia. Agricultural and Forest Meteorology 148:1954-1967. (reviewed).

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. and Yabuki, H. 2008,12 Interannual variation of water balance and summer evapotranspiration in an eastern Siberian larch forest over a 7-year period (1998-2006). Agricultural and Forest Meteorology 148:1941-1953. (reviewed).

Endo, S., Shinoda, T., Tanaka, H., Hiyama, T., Tsuboki, K., Uyeda, H. and Nakamura, K. 2008 Characteristics of vertical circulation in the convective boundary layer over the Huaihe River Basin in China in the early summer of 2004. Journal of Applied Meteorology and Climatology 47:2911-2928. (reviewed).

Tanaka, H., Hiyama, T. and Nakamura, K. 2008 Turbulent flux observations at the tip of a narrow cape on Miyako Island in Japan's Southwestern Islands. Journal of the Meteorological Society of Japan 86:649-667. (reviewed).

Eguchi, K., Abe, O. and Hiyama, T. 2008 Weight loss and isotopic shifts for water drops frozen on a liquid nitrogen surface. Rapid Communications in Mass Spectrometry 22:3233-3237. (reviewed).

Takahashi, A., Hiyama, T., Nishikawa, M., Fujinami, H., Higuchi, A., Li, W., Liu, W. and Fukushima, Y. 2008 Diurnal variation of water vapor mixing between the atmospheric boundary layer and free atmosphere over Changwu, the Loess Plateau in China. SOLA (Scientific Online Letters on the Atmosphere) 4:33-36. (reviewed).

Hiyama, T., Strunin, M.A., Tanaka, H. and Ohta, T. 2007 The development of local circulations around the Lena River and their effect on tower-observed energy imbalance. Hydrological Processes 21:2038-2048. (reviewed).

Tanaka, H., Hiyama, T., Yamamoto, K., Fujinami, H., Shinoda, T., Higuchi, A., Endo, S., Ikeda, S., Li, W. and Nakamura, K. 2007 Surface flux and atmospheric boundary layer observations from the LAPS project over the middle stream of the Huaihe River basin in China. Hydrological Processes 21:1997-2008. (reviewed).

Liu, Y. and Hiyama, T. 2007 Detectability of day-to-day variability in the evaporative flux ratio: A field examination in the Loess Plateau of China. Water Resources Research 43:W08503. DOI:10.1029/2006WR005726 (reviewed).

Liu, Y. and Hiyama, T. 2007 Detectability of day-to-day variability in the evaporative flux ratio: A field examination in the Loess Plateau of China. Water Resources Research 43:W08503. DOI:10.1029/2006WR005726 (reviewed).

Li, W., Hiyama, T. and Kobayashi, N. 2007 Turbulence spectra in the near-neutral surface layer over the Loess Plateau in China. Boundary-Layer Meteorology 124:449-463. (reviewed).

Kobayashi, N., Hiyama, T., Fukushima, Y., Lopez, M.L., Hirano, T. and Fujinuma, Y. 2007 Nighttime transpiration observed over a larch forest in Hokkaido, Japan. Water Resources Research 43:W03407. DOI:10.1029/2006WR005556 (reviewed).

Higuchi, A., Hiyama, T., Fukuta, Y., Suzuki, R. and Fukushima, Y. 2007 The behaviour of a surface temperature / vegetation index (TVX) matrix derived from 10-day composite AVHRR images over monsoon Asia. Hydrological Processes 21:1157-1166. (reviewed).

Sasai, T., Okamoto, K., Hiyama, T. and Yamaguchi, Y. 2007 Comparing terrestrial carbon fluxes from the scale of a flux tower to the global scale. Ecological Modelling 208:135-144. (reviewed).

Babiker, I.S., Mohamed, A.A.M. and Hiyama, T. 2007 Assessing groundwater quality using GIS. Water Resources Management 21:699-715. (reviewed).

Liu, Y., Hiyama, T. and Yamaguchi, Y. 2006 Scaling of land surface temperature using satellite data: A case examination on ASTER and MODIS products over a heterogeneous terrain area. Remote Sensing of Environment 105:115-128. (reviewed).

Liu, Y., Hiyama, T., Kimura, R. and Yamaguchi, Y. 2006 Temporal influences on Landsat-5 Thematic Mapper image in visible band. International Journal of Remote Sensing 27:3183-3201. (reviewed).

Hiyama, T., Kochi, K., Kobayashi, N. and Sirisampan, S. 2005 Seasonal variation in stomatal conductance and physiological factors observed in a secondary warm-temperate forest. Ecological Research 20:333-346. (reviewed).

Strunin, M.A. and Hiyama, T. 2005 Spectral structure of small-scale turbulent and mesoscale fluxes in the atmospheric boundary layer over a thermally inhomogeneous land surface. Boundary-Layer Meteorology 117:479-510. (reviewed).

Babiker, I.S., Mohamed, A.A.M., Hiyama, T. and Kato, K. 2005 A GIS-based DRASTIC model for assessing aquifer vulnerability in Kakamigahara Heights, Gifu Prefecture, central Japan. Science of the Total Environment 345:127-140. (reviewed).

Takahashi, A., Hiyama, T., Takahashi, H.A. and Fukushima, Y. 2004 Analytical estimation of the vertical distribution of CO2 production within soil: application to a Japanese temperate forest. Agricultural and Forest Meteorology 126:223-235. (reviewed).

Strunin, M.A. and Hiyama, T. 2004 Response properties of atmospheric turbulence measurement instruments using Russian research aircraft. Hydrological Processes 18:3099-3117. (reviewed).

Strunin, M.A. and Hiyama, T. 2004 Applying wavelet transforms to analyse aircraft-measured turbulence and turbulent fluxes in the atmospheric boundary layer over eastern Siberia. Hydrological Processes 18:3081-3098. (reviewed).

Takahashi, A. and Hiyama, T. 2004 A momentum exchange model for the surface layer over bare-soil and canopy-covered surfaces. Journal of Applied Meteorology 43(10):1460-1476. (reviewed).

Suzuki, R., Hiyama, T., Asanuma, J. and Ohata, T. 2004 Land surface identification near Yakutsk in eastern Siberia using video images taken from a hedgehopping aircraft. International Journal of Remote Sensing 25(19):4015-4028. (reviewed).

Strunin, M.A., Hiyama, T., Asanuma, J. and Ohata, T. 2004 Aircraft observations of the development of thermal internal boundary layers and scaling of the convective boundary layer over non-homogeneous land surfaces. Boundary-Layer Meteorology 111(3):491-522. (reviewed).

Shimoyama, K., Hiyama, T., Fukushima, Y. and Inoue, G. 2004 Controls on evapotranspiration in a west Siberian bog. Journal of Geophysical Research 109(D08):D08111. DOI:10.1029/2003JD004114 (reviewed).

Hamada, S., Ohta, T., Hiyama, T., Kuwada, T., Takahashi, A. and Maximov, T.C. 2004 Hydrometeorological behaviour of pine and larch forests in eastern Siberia. Hydrological Processes 18:23-39. (reviewed).

Hiyama, T., Strunin, M.A., Suzuki, R., Asanuma, J., Mezrin, M.Y., Bezrukova, N.A. and Ohata, T. 2003 Aircraft observations of the atmospheric boundary layer over a heterogeneous surface in Eastern Siberia. Hydrological Processes 17:2885-2911. (reviewed).

Shimoyama, K., Hiyama, T., Fukushima, Y. and Inoue, G. 2003 Seasonal and interannual variation in water vapor and heat fluxes in a West Siberian continental bog. Journal of Geophysical Research 108(D20):4648. DOI:10.1029/2003JD003485 (reviewed).

Takahashi, H.A., Konohira, E., Hiyama, T., Minami, M., Nakamura, T. and Yoshida, N. 2002 Diurnal variation of CO2 concentration, D14C and d13C in an urban forest: Estimate of the anthropogenic and biogenic CO2 contributions. Tellus 54B:97-109. (reviewed).

Takahashi, H.A., Hiyama, T., Konohira, E., Takahashi, A., Yoshida, N. and Nakamura, T. 2001 Balance and behavior of carbon dioxide at an urban forest inferred from the isotopic and meteorological approaches. Radiocarbon 43(2B):659-669. (reviewed).

Ohta, T., Hiyama, T., Tanaka, H., Kuwada, T., Maximov, T.C., Ohata, T. and Fukushima, Y. 2001 Seasonal variation in the energy and water exchanges above and below a larch forest in eastern Siberia. Hydrological Processes 15:1459-1476. (reviewed).

Ma, X., Fukushima, Y., Hiyama, T., Hashimoto, T. and Ohata, T. 2000 A macro-scale hydrological analysis of the Lena River basin. Hydrological Processes 14:639-651. (reviewed).

Hiyama, T., Sugita, M., Bergstrom, H. and Molder, M. 1999 Wind speed measurements in upper and lower boundary layer to determine regional momentum fluxes. Agricultural and Forest Meteorology 98-99:145-158. (reviewed).

Sugita, M., Endo, N. and Hiyama, T. 1999 Regional surface momentum flux derived from atmospheric boundary layer bulk similarity approach. Journal of Geophysical Research 104(D14):16965-16972. (reviewed).

Ma, X., Fukushima, Y., Hashimoto, T., Hiyama, T. and Nakashima, T. 1999 Application of a simple SVAT model in a mountain catchment under temperate humid climate. Journal of Japan Society of Hydrology & Water Resources 12:285-294. (reviewed).

Liu, J., Fukushima, Y. and Hiyama, T. 1999 Hydrological response of meltwater from glacier covered mountain basins to climate change in northwest China. IAHS Publications(256):193-207. (reviewed).

Molder, M., Sugita, M., Hiyama, T. and Bergstrom, H. 1998 Regional sensible heat flux and thermal roughness length of an inhomogeneous landscape. Hydrological Processes 12:2115-2131. (reviewed).

Ma, X., Hiyama, T., Fukushima, Y. and Hashimoto, T. 1998 A numerical model of the heat transfer for permafrost regions. Journal of Japan Society of Hydrology & Water Resources 11:346-359. (reviewed).

Sugita, M., Hiyama, T. and Kayane, I. 1997 How regional are the regional fluxes obtained from lower atmospheric boundary layer data?. Water Resources Research 33:1437-1445. (reviewed).

Hiyama, T., Sugita, M. and Kotoda, K. 1996 Regional roughness parameters and momentum fluxes over a complex area. Journal of Applied Meteorology 35:2179-2190. (reviewed).

Sugita, M., Hiyama, T. and Ikukawa, T. 1996 Determination of canopy emissivity: how reliable is it?. Agricultural and Forest Meteorology 81:229-239. (reviewed).

Sugita, M., Hiyama, T., Endo, N. and Tian, Shao-Fen. 1995 Flux determination over a smooth surface under strongly unstable conditions. Boundary-Layer Meteorology 73:145-158. (reviewed).

Hiyama, T., Sugita, M. and Kayane, I. 1995 Variability of surface fluxes within a complex area observed during TABLE 92. Agricultural and Forest Meteorology 73:189-207. (reviewed).

Sugita, M., Kayane, I. and Hiyama, T. 1993 IGBP/BAHC field experiment to address scale problems in land-surface parameterization. IAHS Publications(212):389-396. (reviewed).

Research Presentations

【Oral Presentation】

Tetsuya Hiyama, Toru Sakai, Shamil Maksyutov, Heonsook Kim, Takahiro Sasai, Yasushi Yamaguchi, Atsuko Sugimoto, Shunsuke Tei, Takeshi Ohta, Ayumi Kotani, Kazukiyo Yamamoto, Takeshi Yamazaki, Kazuhiro Oshima, Hotaek Park, Trofim C. Maximov, Alexander N. Fedorov Global warming and changes in Siberian terrestrial environments. 2nd International Conference on "Global Warming and the Human-Nature Dimension in Siberia: Social Adaptation to the Changes of the Terrestrial Ecosystem, with an Emphasis on Water Environments", 2013.10.08-2013.10.11, Lecture Hall, National Academy of Republic of Sakha (Yakutia), Yakutsk, Russia.

Takakura, H., Yoshikawa, Y., Watanabe, M., Sakai, T. and Hiyama, T. Ice movement in the Lena river and the typology of spring flood: An interpretation of local sources integrated with satellite imagery using a multidisciplinary approach. Third International Symposium on the Arctic Research (ISAR-3), 2013.01.14-2013.01.17, Tokyo.

Yoshihiro Tachibana, Kazuhiro Oshima, Tetsuya Hiyama Climatological features of atmospheric and terrestrial water cycles in the three great Siberian rivers and their interannual variations. 2nd International Conference on "Global Warming and the Human-Nature Dimension in Siberia: Social Adaptation to the Changes of the Terrestrial Ecosystem, with an Emphasis on Water Environments", 2013.10.08-2013.10.11, Conference Hall of Institute for Biological Problems of Cryolithozone, Yakutsk, Russia.

Saigusa, N., Suzuki, R., Hiyama, T. and Hayashi, K. Cross-disciplinary research collaboration for early detection of biological feedbacks. Third International Symposium on the Arctic Research (ISAR-3), 2013.01.14-2013.01.17, Tokyo.

Ryuhei Yoshida, Masahiro Sawada, Takeshi Yamazaki, Takeshi Ohta, Tetsuya Hiyama Estimation of regional water cycle changes by various land-cover-change scenarios in eastern Siberia. 2nd International Conference on "Global Warming and the Human-Nature Dimension in Siberia: Social Adaptation to the Changes of the Terrestrial Ecosystem, with an Emphasis on Water Environments", 2013.10.08-2013.10.11, Conference Hall of Institute for Biological Problems of Cryolithozone, Yakutsk, Russia.

Hiyama, T. Waterlogging risk in Eastern Siberia: A case study in the permafrost region. World Congress on Risk 2012: Risk and Development in a Changing World, 2012.07.17-2012.07.20, Sydney Convention and Exhibition Centre, Sydney, Australia.

Hiyama, T., T. Ohta, A. Sugimoto, T. Yamazaki, K. Oshima, H. Yonenobu, K. Yamamoto, A. Kotani, H. Park, Y. Kodama, S. Hatta, A.N. Fedorov, T.C. Maximov Changes in eco-hydrological systems under recent climate change in eastern Siberia. IAHS-IAPSO-IASPEI Joint Assembly "Knowledge for the Future", Session H02 "Cold and mountain region hydrological systems under climate change: towards improved projections", 2013.07.22-2013.07.26, Gothenburg, Sweden.

Oshima, K. and Hiyama, T. Seasonal and interannual variations of the Lena River discharge and their relationships to atmospheric water cycle. 日本地球惑星科学連合2012年大会, 2012.05.20-2012.05.25, 千葉・幕張.

Jack Ratjindua Kambatuku, Tetsuya Hiyama, Miho Hanamura, Tetsuji Suzuki, Yuichiro Fujioka, Takeshi Ohta, Morio Iijima Regional Precipitation Patterns and their Implication for Drought-Adapted Mixed Cropping Systems in the Cuvelai Drainage Basin, North-Central Namibia. International Symposium of SATREPS Rice-Mahangu Project "Agricultural Use of Seasonal Wetland Formed in Semiarid Region of Africa", 2013.07.13, Noyori Conference Hall, Nagoya University, Nagoya.

Sakai, T., Hiyama, T., Fujiwara, J., Gotovtsev, S., Gagarin, L. and Yamaguchi, Y. Monitoring permafrost degradation in Siberia using microwave remote sensing sensor. 日本地球惑星科学連合2012年大会, 2012.05.20-2012.05.25, 千葉・幕張.

Tetsuya Hiyama, Shamil Maksyutov, Heonsook Kim, Takahiro Sasai, Yasushi Yamaguchi, Atsuko Sugimoto, Hitoshi Yonenobu, Takeshi Ohta, Ayumi Kotani, Kazukiyo Yamamoto, Takeshi Yamazaki, Kazuhiro Oshima, Hotaek Park Global warming and changes in Siberian terrestrial environments. 日本地球惑星科学連合2013年大会, 2013.05.19-2013.05.24, 千葉市(幕張メッセ).

Hiyama, T., Asai, K., Kolesnikov, A., Gagarin, L. and Shepelev, V. Age estimation of permafrost groundwater in Eastern Siberia. 日本地球惑星科学連合2012年大会, 2012.05.20-2012.05.25, 千葉・幕張.

Kazuhiro Oshima, Yoshihiro Tachibana, Tetsuya Hiyama Climatological features of atmospheric and terrestrial water cycles in the three great Siberian rivers. 日本地球惑星科学連合2013年大会, 2013.05.19-2013.05.24, 千葉市(幕張メッセ).

Sakai, T., Hiyama, T., Fujiwara, J., Gotovtsev, S. and Gagarin, L. Flood disaster caused by permafrost degradation in the far north of Siberia. 1st International Conference on "Global Warming and the Human-Nature Dimension in Siberia: Social Adaptation to the Changes of the Terrestrial Ecosystem, with an Emphasis on Water Environments", 2012.03.07-2012.03.09, Lecture Hall, Research Institute for Humanity and Nature (RIHN), Kyoto.

Hiyama, T., Asai, K., Kolesnikov, A., Gagarin, L. and Shepelev, V. Residence time estimation of permafrost groundwater at Yakutsk region, eastern Siberia. 1st International Conference on "Global Warming and the Human-Nature Dimension in Siberia: Social Adaptation to the Changes of the Terrestrial Ecosystem, with an Emphasis on Water Environments", 2012.03.07-2012.03.09, Lecture Hall, Research Institute for Humanity and Nature (RIHN), Kyoto.

Oshima, K. and Hiyama, T. Seasonal and interannual variations of the Lena River discharge and those relationships with atmospheric water cycle. 1st International Conference on "Global Warming and the Human-Nature Dimension in Siberia: Social Adaptation to the Changes of the Terrestrial Ecosystem, with an Emphasis on Water Environments", 2012.03.07-2012.03.09, Lecture Hall, Research Institute for Humanity and Nature (RIHN), Kyoto.

Wada, R., Takemura, M., Ouchi, M., Nakayama, T., Matsumi, Y., Takanashi, S., Nakai, Y., Kitamura, K., Kurita, N., Fujiyoshi, Y., Muramoto, K., Hiyama, T., Inoue, G., Kodama, N. and Nakano, T. Real-time, continuous measurements of CO2 and H2O isotopic compositions in the forest site at the foot of Mt. Fuji using laser absorption spectrometers. Symposium on the use of new techniques to understand gas exchange and carbon dynamics in the forest ecosystem, 2010.11.01, Kyoto University, Kyoto.

Wada, R., Takemura, M., Ouchi, M., Nakayama, T., Matsumi, Y., Takanashi, S., Nakai, Y., Kitamura, K., Kurita, N., Fujiyoshi, Y., Muramoto, K., Hiyama, T., Inoue, G., Kodama, N. and Nakano, T. Real-time, continuous measurements of CO2 and H2O isotopic compositions in the forest site at the foot of Mt. Fuji using laser absorption spectrometers. International Symposium on Environmental Monitoring in East Asia, 2010.09.27-2010.09.28, Kanazawa University, Kanazawa, Ishikawa.

Hiyama, T. and Asai, K. Residence time estimation for vulnerability assessment of supra-permafrost and intra-permafrost groundwater in central Yakutia. Forum for Young Permafrost Scientists -The past, present and future of geocryology-, 2010.08.02-2010.08.04, Melnikov Permafrost Institute, Yakutsk, Russia.

【Poster Presentation】

Hiyama, T., Asai, K., Gagarin, L. and Kolesnikov, A. Age estimation of supra-permafrost and intra-permafrost groundwater in Yakutsk region, Eastern Siberia. Third International Symposium on the Arctic Research (ISAR-3), 2013.01.14-2013.01.17, Tokyo.

Sakai, T., Hiyama, T., Fujiwara, J., Gotovtsev, S., Gagarin, L. and Yamaguchi, Y. Permafrost degradation and flood occurrence in the Far North of Siberia. Third International Symposium on the Arctic Research (ISAR-3), 2013.01.14-2013.01.17, Tokyo.

Oshima, K., Iijima, Y., Hori, M. E., Inoue, J. and Hiyama, T. Changes in the Lena river discharge and net precipitation over the basin during 2005-2008. Third International Symposium on the Arctic Research (ISAR-3), 2013.01.14-2013.01.17, Tokyo.

Hiyama, T., Asai, K., Kolesnikov, A., Gagarin, L. and Shepelev, V. Estimation of residence time of permafrost groundwater in the Yakutsk region, eastern Siberia. 3rd International Conference on Forest and Water in a changing environment, 2012.09.18-2012.09.20, FIT Hall, Fukuoka, Japan.

Sakai, T,. Hatta, S., Okumura, M., Takeuchi, W., Hiyama, T. and Inoue, G. The special-temporal variation of flood disasters at Lena river using satellite time-series data. 5th International Workshop on C/H2O/Energy balance and climate over boreal and arctic region with special emphasis on eastern Siberia, 2010.11.11-2010.11.13, Wageningen, The Netherlands.

Sakai, T., Hatta, S., Okumura, M., Takeuchi, W., Hiyama, T. and Inoue, G. A time-series analysis of flood disaster around Lena river using Landsat TM/ETM+. European Geosciences Union (EGU) General Assembly 2010, 2010.05.02-2010.05.07, Vienna, Austria.

【Invited Lecture / Honorary Lecture / Panelist】

Hiyama, T. Global Warming and the Human-Nature Dimension in Siberia - Social Adaptation to the Changes of the Terrestrial Ecosystem, with an Emphasis on Water Environments -. Reflections on Russian "Center-Periphery" Relationships, Institute of Russia-CIS Studies, Korea University, Humanities Korea (HK) Project, "Studies on Russia: Time and Space of Risks and Opportunities", 2011.05.28, Conference Room 6, Inchon Memorial Hall, Korea University, Seoul, Korea.