論文 Partitioning eddy-covariance methane fluxes from a shallow lake into diffusive and ebullitive fluxes Boundary-Layer Meteorology,169:413-428 2018(Jun.) Author:Iwata, H., Hirata, R., Takahashi, Y., Miyabara, Y., Itoh, M., and Iizuka, K.
Leaf- and ecosystem-scale photosynthetic parameters for the overstory and understory
of boreal forests in interior Alaska Journal of Agricultural Meteorology,74(2):79-86 2018(Apr.) Author:Ueyama, M., Tahara, N., Nagano, H., Makita, N., Iwata, H., and Harazono, Y.
Exploring sub-daily to seasonal variations in methane exchange in a single-crop rice paddy in central Japan Atmospheric Environment,179:156-165 2018(Feb.) Author:Iwata, H., Mano, M., Ono, K., Tokida, T., Kawazoe, T., Kosugi, Y., Sakabe, A., Takahashi, K., and Miyata, A.
Evaluating the relationship between wildfire extent and nitrogen dry deposition in a boreal forest in interior Alaska Polar Science,11:96-104 2017(Mar.) Author:Nagano, H. and Iwata, H.
A multi-scale comparison of modeled and observed seasonal methane emissions in northern wetlands Biogeosciences,13:5043-5056 2016(Aug.) Author:Xu, X., Riley, W. J., Koven, C. D., Billesbach, D. P., Chang, R. Y.-W., Commane, R., Euskirchen, E. S., Hartery, S., Harazono, Y., Iwata, H., McDonald, K. C., Miller, C. E., Oechel, W. C., Poulter, B., Raz-Yaseef, N., Sweeney, C., Torn, M., Wofsy, S. C., Zhang, Z., and Zona D.
Optimization of a biochemical model with eddy covariance measurements in black spruce forests of Alaska for estimating CO2 fertilization effects Agricultural and Forest Meteorology,222:98-111 2016(Mar.) Author:Ueyama, M., Tahara, T., Iwata, H., Euskirchen, E. S., Ikawa, H., Kobayashi, H., Nagano, H., Nakai, T., Harazono, Y.
Latitudinal gradient of spruce forest understory and tundra phenology in Alaska as observed from satellite and ground-based data Remote Sensing of Environment,177:160-170 2016(Feb.) Author:Kobayashi, H., Yunus, A. P., Nagai, S., Sugiura, K., Kim, Y., Van Dam, B., Nagano, H., Zona, D., Harazono, Y., Bret-Harte, M. S., Ichii, K., Ikawa, H., Iwata, H., Oechel, W. C., Ueyama, M., Suzuki, R.
Methane exchange in a poorly-drained black spruce forest over permafrost observed using the eddy covariance technique Agricultural and Forest Meteorology,214-215:157-168 2015(Aug.) Author:Iwata, H., Harazono, Y., Ueyama, M., Sakabe, A., Nagano, H., Kosugi, Y., Takahashi, K., Kim, Y.
Temperature regimes and turbulent heat fluxes across a heterogeneous canopy in an Alaskan boreal forest Journal of Geophysical Research - Atmospheres,120(4):1348-1360 2015 Author:Starkenburg, D., Fochesatto, G. J., Cristobal, J., Prakash, A., Gens, R., Alfieri, J., Nagano, H., Harazono, Y., Iwata, H., and Kane, D. L.
Effects of water vapor dilution on trace gas flux, and practical correction methods Journal of Agricultural Meteorology,71(2):65-76 2015 Author:Harazono, Y., Iwata, H., Sakabe, A., Ueyama, M., Takahashi, K., Nagano, H., Nakai, T., and Kosugi, Y.
Change in surface energy balance in Alaska due to fire and spring warming, based on upscaling eddy covariance measurements Journal of Geophysical Research - Biogeosciences,119:1947-1969 2014 Author:Ueyama, M., Ichii, K., Iwata, H., Euskirchen, E. S., Zona, D., Rocha, A. V., Harazono, Y., Iwama, C., Nakai, T., and Oechel, W. C.
An inter-comparison between Gill and Campbell sonic anemometers Agricultural and Forest Meteorology,195-196:123-131 2014 Author:Nakai, T., Iwata, H., Harazono, Y., and Ueyama, M.
Permafrost thaw affects boreal deciduous plant transpiration throught increased soil water, deeper thaw, and warmer soils Ecohydrology,7:982-997 2014 Author:Cable, J. M., Ogle, K., Bolton, W. R., Bentley, L. P., Romanovsky, V., Iwata, H., Harazono, Y., and Welker, J.
Cross-validation of open-path and closed-path eddy-covariance techniques for observing methane fluxes Boundary-Layer Meteorology,151:95-118 2014 Author:Iwata, H., Kosugi, Y., Ono, K., Mano, M., Sakabe, A., Miyata, A., and Takahashi, K.
Autumn warming reduces the CO2 sink of a black spruce forest in interior Alaska based on a nine-year eddy covariance measurement Global Change Biology,20:1161-1173 2014 Author:Ueyama, M., Iwata, H., and Harazono, Y.
Upacaling terrestrial carbon dioxide fluxes in Alaska with satellite remote sensing and support vector regression Journal of Geophysical Research: Biogeosciences,118:1266-1281 2013 Author:Ueyama, M., Ichii, K., Iwata, H., Euskirchen, E. S., Zona, D., Rocha, A. V., Harazono, Y., Iwama, C., Nakai, T., and Oechel, W.
Growing season and spatial variations of carbon fluxes of Arctic and boreal ecosystems in Alaska Ecological Applications,23:1798-1816 2013 Author:Ueyama, M., Iwata, H., Harazono, Y., Euskirchen, E. S., Oechel, W. C., and Zona, D.
A variation in the fraction of absorbed photosynthetically active radiation and a comparison with MODIS data in burned black spruce forests of interior Alaska Polar Science,7:113-124 2013 Author:Iwata, H., Ueyama, M., Iwama, C., and Harazono, Y.
Sensitivity and offset changes of a fast-response open-path gas analyzer during long-term observations in an Arctic environment Journal of Agricultural Meteorology,68:175-181 2012 Author:Iwata, H., Harazono, Y., and Ueyama, M.
Climatic physical snowpack properties for large-scale modeling examined by observations and a physical model Polar Science,6:79-95 2012 Author:Saito, K., Yamaguchi, S., Iwata, H., Harazono, Y., Kosugi, K., Lehning, M., and Shulski, M.
Seasonal and interannual variation in net ecosystem production of an evergreen needleleaf forest Journal of Forest Research,17:283-295 2012 Author:Mizoguchi, Y., Ohtani, Y., Takanashi, S., Iwata, H., Yasuda, Y., and Nakai, Y.
The role of permafrost in water exchange of a black spruce forest in Interior Alaska Agricultural and Forest Meteorology,161:107-115 2012 Author:Iwata, H., Harazono, Y., and Ueyama, M.
Calculating downward longwave radiation under clear and cloudy conditions over a tropical lowland forest site: an evaluation of model schemes for hourly data Theoretical and Applied Climatology,107:461-477 2012 Author:Marthews, T., Malhi, Y., and Iwata, H.
Quick recovery of carbon dioxide exchanges in a burned black spruce forest in Interior Alaska SOLA,7:105-108 2011 Author:Iwata, H., Ueyama, M., Harazono, Y., Tsuyuzaki, S., Kondo, M., and Uchida, M.
Importance of mixing ratio for a long-term CO2 flux measurement with a closed-path system Tellus,63B:302-308 2011 Author:Nakai, T., Iwata, H., and Harazono, Y.
Climatic characteristics of the Fujiyoshida forest meteorology research site Mount Fuji Research,5:1-6 2011 Author:Mizoguchi, Y., Ohtani, Y., Nakai, Y., Iwata, H., Takanashi, S., Yasuda, Y., Nakano, T., Yasuda, T., Watanabe, T.
Influence of source/sink distributions on flux-gradient relationships in the roughness sublayer over an open forest canopy under unstable conditions Boundary-Layer Meteorology,136:391-405 2010 Author:Iwata, H., Harazono, Y. and Ueyama, M.
Vertical length scale of transporting eddies for sensible heat in the unstable roughness sublayer over a forest canopy Journal of Agricultural Meteorology,65:1-9 2009 Author:Iwata, H., Asanuma, J., Ohtani, Y., Mizoguchi, Y. and Yasuda, Y.
Gap-filling measurements of carbon dioxide storage in tropical rainforest canopy airspace Agricultural and Forest Meteorology,132:305-314 2005 Author:Iwata, H., Malhi, Y. and von Randow, C.
Eddy covariance and biogeochemical observations of methane dynamics in a shallow mid-latitude lake in Japan OzFlux-AsiaFlux Joint Conference 2018(Aug. 23) Author:Iwata, H., Hirata, R., Takahashi, Y., Itoh, M., Miyabara, Y., and Kobayashi, D.
Driving factors of the change in evapotranspiration from a red pine ecosystem OzFlux-AsiaFlux Joint Conference 2018(Aug. 23) Author:Suzuki, T., Iwata, H., Takanashi, S., Miyama, T., Mizoguchi, Y., Okano, M., Kominami, Y., and Yoshifuji, N.
Long-term monitoring carbon balance at a black spruce forest in interior Alaska Fifth International Symposium on Arctic Research 2018(Jan. 16) Author:Ueyama, M., Iwata, H., Nagano, H., and Harazono, Y.
Methane production potential and microbial community structure for different forest soils AGU Fall Meeting 2017 2017(Dec.) Author:Matsumoto, Y., Ueyama, M., Kominami, Y., Endo, R., Tokumoto, H., Hirano, T., Takagi, K., Takahashi, Y., Iwata, H., and Harazono, Y.
Evaluation of methane emission from a mid-latitude lake with the eddy covariance technique Physical Processes in Natural Waters 2017(Aug. 22) Author:Iwata, H., Hirata, R., Takahashi, Y., Itoh, M., Iizuka, K., Miyabara, Y., Kobayashi, D., and Tokida, T.
Simulation of heat exchange and water temperature profile in a shallow mid-latitude lake AsiaFlux Workshop 2017 2017(Aug. 17) Author:Kobayashi, D., Iwata, H., Miyabara, Y., and Stepanenko, V.
Evaluation of methane emission from a mid-latitude lake with the eddy covariance technique AsiaFlux Workshop 2017 2017(Aug. 17) Author:Iwata, H., Hirata, R., Takahashi, Y., Itoh, M., Iizuka, K., Miyabara, Y., Nakazawa, K., Satoh, H., Kobayashi, D., and Tokida, T.
Response of methane emission from a poorly-drained black spruce forest over permafrost in an interior Alaska The 2nd Asian Conference on Permafrost 2017(Jul.) Author:Igarashi, Y., Iwata, H., Ueyama, M., Hiyama, T., Futakuchi, Y., Matsumoto, Y., and Harazono, Y.
Response of methane emission from a poorly-drained black spruce forest over permafrost in an Interior Alaska The Seventh Symposium on Polar Science 2016(Dec.) Author:Igarashi, Y., Iwata, H., Ueyama, M., Hiyama, T., Futakuchi, Y., Matsumoto, Y., and Harazono, Y.
Carbon and water exchange studies of black spruce forests in Interior Alaska International Russian-Japanese conference of young polar scientists 2016(Oct. 11) Author:Iwata, H.
Greenhouse gas fluxes at boreal and arctic wetland in Alaska 15th International Peat Congress 2016 2016(Aug.) Author:Ueyama, M., Iwata, H., Nagano, H., Ichii, K., and Harazono, Y.
Satellite and ground-based monitoring of terrestrial ecosystem structure and phenology in Arctic and sub-Arctic region Arctic Science Summit Week 2016 2016(Mar.) Author:Kobayashi, H., Yang, W., Yunus, A., Nagai, S., Ono, Y., Sugiura, K., Nasahara, K., Kim, Y., Van Dam, B., Nagano, H., Zona, D., Harazono, Y., Bret-Harte, M. S., Ichii, K., Ikawa, H., Iwata, H., Oechel, W., Ueyama, M., and Suzuki, R.
北方林における森林火災からの遷移に伴う植物生理特性の変動 日本農業気象学会2016年全国大会 2016(Mar.) Author:田原成美，植山雅仁，岩田拓記，永野博彦，原薗芳信，市井和仁，伊川浩樹，Euskirchen, E. S.
Successional change in photosynthetic capacities after wildfires across the North American boreal forests American Geophysical Union Fall Meeting 2015(Dec.) Author:Tahara, N., Ueyama, M., Iwata, H., Nagano, H., Harazono, Y., and Ichii, K.
Empirically constrained estimates of Alaskan regional net ecosystem exchange of CO2, 2012-2014 AGU Fall meeting 2015(Dec.) Author:Commane, R., Lindaas, J., Benmergui, J. S., Luus, K. A., Chan, R. Y. –W., Miller, S. M., Henderson, J., Karion, A., Miller, J. B., Sweeney, C., Miller, C. E., Lin, J. C., Oechel, W. C., Zona, D., Euskirchen, E. S, Iwata, H., Ueyama, M., Harazono, Y., Veraverbeke, S., Randerson, J. T., Daube, B. C., Pittman, J. V., and Wofsy, S. C.
Regional CO2 uptake estimation applying the light use efficiency model with MODIS and field data to examine wildfire effects in Alaskan boreal forest Arctic Science Summit Week 2015 2015(Apr.) Author:Otsuki, M., Iwata, H., Iwata, T., Nagano, H., Harazono, Y., Iwama, C., and Ueyma, M.
Methane exchange in a poorly-drained black spruce forest over permafrost observed with the eddy covariance technique Arctic Science Summit Week 2015 2015(Apr.) Author:Iwata, H., Harazono, Y., Ueyama, M., Sakabe, A., Nagano, H., Kosugi, Y., Takahashi, K., and Kim, Y.
Methane exchange in a poorly-drained black spruce forest over permafrost observed with the eddy covariance technique Arctic Change 2014 2014(Dec.) Author:Iwata, H., Harazono, Y., Ueyama, M., Sakabe, A., Nagano, H., Kosugi, Y., Takahashi, K., Kim, Y.
AsiaFlux Workshop 2015 -Challenges and Significance of Ecosystem Research in Asia to Better Understand Climate Change- 参加報告 生物と気象 , 16:D1-5 2016(Feb.) Author:岩田拓記，沖元洋介，佐伯田鶴，和田龍一，平田竜一
A year-round flux observation at an area burned by wildfire in Interior Alaska AsiaFlux Newsletter , 32:13-18 2011 Author:Iwata, H., Ueyama, M., and Harazono, Y.
Comparison of the characteristics of five quantum sensors Bulletin of FFPRI , 9:113-120 2010 Author:Mizoguchi, Y., Ohtani, Y., Aoshima, T., Hirakata, A., Yuta, S., Takanashi, S., Iwata, H., and Nakai, Y.
Development of portable CO2 flux observation system using a closed-path gas analyzer for intercomparison Bulletin of FFPRI , 9:31-36 2010 Author:Ohtani, Y., Mizoguchi, Y., Takanashi, S., Yasuda, Y., Iwata, H., Nakai, Y., Yuta, S., and Yamanoi, K.
Continuous methane flux observation, and validation of carbon, water and energy exchanges during forest recovery from fire in black spruce forests in Alaska IJIS Newsletter , 9:2-3 2009 Author:Iwata, H.
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