書籍等出版物 Greenhouse gases and energy fluxes at permafrost zone, Arctic Hydrology, Permafrost and Ecosystem Springer 2020(Oct. 01) Author:Ueyama, M., Iwata, H., Kobayashi, H., Euskirchen, E., Merbold, L., Ohta, T., Machimura, T., Zona, D., Oechel, W. C., and Schuur, E. A. G.
論文 Evaluating the Drought Code for lowland taiga of Interior Alaska using eddy covariance measurements International Journal of Wildland Fire,in pres 2023(Jun.) Author:Milller, E. A., Iwata, H., Ueyama, M., Harazono, Y., Kobayashi, H., Ikawa, H., Busey, R., Iwahana, G., and Euskirchen, E. S.
Upscaling wetland methane emissions from the FLUXNET-CH4 eddy covariance network (UpCH4 v1.0): Model development, network assessment, and budget comparison AGU Advances,in pres 2023(May) Author:McNicol, G et al.
Snow disappearance timing associated with elevation and vegetation type determines heterogeneity in spring onset in interior Alaska Polar Science,35:100918 2023(Mar.) Author:Kawashima, S., Ueyama, M., Harazono, Y., Iwata, H., Kobayashi, H.
Methane and carbon dioxide emissions from the forest floor of a black spruce forest on permafrost in interior Alaska Polar Science,35:100921 2023(Mar.) Author:Ueyama, M., Iwata, H., Endo, R., Harazono, Y.
Paddy rice methane emissions across Monsoon Asia Remote Sensing of Environment,284:113335 2023(Jan.) Author:Ouyang, Z., Jackson, R. B., McNicol, G., Fluet-Chouinard, E., Runkle, B. R. K., Papale, D., Knox, S. H., Cooley, S., Delwiche, K. B., Feron, S., Irvin, J. A., Malhotra, A., Muddasir, M., Sabbatini, S., Alberto, M. C. R., Cescatti, A., Chen, C.-L., Dong, J., Fong, B. N., Guo, H., Hao, L., Iwata, H., Jia, Q., Ju, W., Kang, M., Li, H., Kim, J., Reba, M. L., Nayak, A. K., Roberti, D. R., Ryu, Y., Swain, C. K., Tsuang, B., Xiao, X., Yuan, W., Zhang, G., Zhang, Y.
Modeled production, oxidation and transport processes of wetland methane emissions in temperate, boreal, and Arctic regions Global Change Biology,29:2313-2334 2023(Jan.) Author:Ueyama, M., Knox, S. H., Delwiche, K. B., Bansal, S., Riley, W. J., Baldocchi, D., Hirano, T., McNicol, G., Schafer, K., Windham-Myers, L., Poulter, B., Jackson, R. B., Chang, K.-Y., Chen, J., Chu, H., Desai, A. R., Gogo, S., Iwata, H., Kang, M., Mammarella, I., Peichl, M., OSonnentag, O., Tuittila, E.-S., Ryu, Y., Euskirchen, E. S., Göckede, M., Jacotot, A., Nilsson M. B., Sachs, T.
Bulk transfer coefficients estimated from eddy-covariance measurements over lakes and reservoirs Journal of Geophysical Research: Atmosphere,128:e2022JD037219 2023(Jan.) Author:Guseva, S., Armani, F., Desai, A. R., Dias, N. L., Friborg, T., Iwata, H., Jansen, J., Lükő, G., Mammarella, I., Repina, I., Rutgersson, A., Sachs, T., Scholz, K., Spank, U., Stepanenko, V., Torma, P., Vesala, T., Lorke, A.
Vegetation type is an important predictor of the Arctic summer land surface energy budget Nature Communications,13:6379 2022(Oct. 31) Author:Oehri, J., Schaepman-Strub, G., Kim, J.-S., Grysko, R., Kropp, H., Grünberg, I., Zemlianskii, V., Sonnentag, O., Euskirchen, E. S., Chacko, M. R., Muscari, G., Blanken, P. D., Dean, J. F., di Sarra, A., Harding, R. J., Sobota, I., Kutzbach, L., Plekhanova, E., Riihelä, A., Boike, J., Miller, N. B., Beringer, J., López-Blanco, E., Stoy, P. C., Sullivan, R. C., Kejna, M., Parmentier, F.-J. W., Gamon, J. A., Mastepanov, M., Wille, C., Jackowicz-Korczynski, M., Karger, D. N., Quinton, W. L., Putkonen, J., van As, D., Christensen, T. R., Hakuba, M. Z., Stone, R. S., Metzger, S., Vandecrux, B., Frost, G. V., Wild, M., Hansen, B., Meloni, D., Domine, F., te Beest, M., Sachs, T., Kalhori, A., Rocha, A. V., Williamson, S. N., Morris, S., Atchley, A. L., Essery, R., Runkle, B. R. K., Holl, D., Riihimaki, L. D., Iwata, H., Schuur, E. A. G., Cox, C. J., Grachev, A. A., McFadden, J. P., Fausto, R. S., Göckede, M., Ueyama, M., Pirk, N., de Boer, G., Bret-Harte, M. S., Leppäranta, M., Steffen, K., Friborg, T., Ohmura, A., Edgar, C. W., Olofsson, J., and Chambers, S. D.
What explains the year-to-year variation in growing season timing of boreal black spruce forests? Agricultural and Forest Meteorology,324:109113 2022(Aug.) Author:El-Amine, M., Roy, A., Koebsch, F., Baltzer, J. L., Barr, A., Black, A., Ikawa, H., HIwata, H., Kobayashi, H., Ueyama, M., and Sonnentag, O.
Causality guided machine learning model on wetland CH4 emissions across global wetlands Agricultural and Forest Meteorology,324:109115 2022(Aug.) Author:Yuan, K., Zhu, Q., Li, F., Riley, W. J., Torn, M., Chu, H., McNicol, G., Chen, M., Knox, S., Delwiche, K., Wu, H., Baldocchi, D., Ma, H., Desai, A. R., Chen, J., Sachs, T., Ueyama, M., Sonnentag, O., Helbig, M., Tuittila, E.-S., Jurasinski, G., Koebsch, F., Campbell, D., Schmid, H. P., Lohila, A., Goeckede, M., Nilsson, M. B., Friborg, T., Jansen, J., Zona, D., Euskirchen, E., Ward, E. J., Bohrer, G., Jin, Z., Liu, L., Iwata, H., Goodrich, J., Jackson, R.
Origin of Deep Methane from Active Faults along the Itoigawa-Shizuoka Tectonic Line between the Eurasian and North American plates: 13C/12C & 14C/12C Methane Profiles from a Pull-Apart Basin at Lake Suwa ACS Earth and Space Chemistry,6:1689-1697 2022(May) Author:Urai, A., Takano, Y., Matsui, Y., Iwata, H., Miyairi, Y., Yokoyama, Y., Miyabara, Y., Ohkouchi, N., Park, H.-D.
Surface Urban Energy and Water Balance Scheme (v2020a) in vegetated areas: parameter derivation and performance evaluation using FLUXNET2015 dataset Geoscientific Model Development,15:3041-3078 2022(Mar.) Author:Omidvar, H., Sun, T., Grimmond, S., Bilesbach, D., Black, A., Chen, J., Duan, Z., Gao, Z., Iwata, H., McFadden, J. P.
Global maps of soil temperature Global Change Biology,28:3110-3144 2022(Jan.) Author:Lembrechts, J. J., van den Hoogen, J., Aalto, J., Ashcroft, M. B., De Frenne, P., Kemppinen, J., Kopecký, M., Luoto, M., Maclean, I. M. D., Crowther, T. W., Bailey, J. J., Haesen, S., Klinges, D. H., Niittynen, P., Scheffers, B. R., Van Meerbeek, V., Aartsma, P., Abdalaze, O., Abedi, M., Aerts, R.,Ahmadian, N., Ahrends, A., Alatalo, J. M., Alexander, J. M., Allonsius, C. N., Altman, J., Ammann, C., Andres, C., Andrews, C., Ardö, J., Arriga, N., Arzac, A., Aschero, V., Assis, R. L., Assmann, J. J., Bader, M. Y., Bahalkeh, K., Barančok, P., Barrio, I. C., Barros, A., Barthel, M., Basham, E. W., Bauters, M., Bazzichetto, M., Marchesini, L. B., Bell, M. C., Benavides, J. C., Alonso, J. L. B., Berauer, B. J., Bjerke, J. W., Björk, R. G., Björkman, M. P., Björnsdóttir, K., Blonder, B., Boeckx, P., Boike, J., Bokhorst, S., Brum, B. N. S., Brůna, J., Buchmann, N., and co-authors
The ABCflux database: Arctic-Boreal CO2 flux observations and ancillary information aggregated to monthly time steps across terrestrial ecosystems Earth System Science Data,14:179-208 2021(Dec.) Author:Virkkala, A.-M., Natali, S. M., Rogers, B. M., Watts, J. D., Savage, K., Connon, S. J., Mauritz, M., Schuur, E. A. G., Peter, D., Minions, C., Nojeim, J., Commane, R., Emmerton, C. A., Goeckede, M., Helbig, M., Holl, D., Iwata, H., Kobayashi, H., Kolari, P., López-Blanco, E., Marushchak, M. E., Mastepanov, M., Merbold, L., Parmentier, F.-J. W., Peichl, M., Sachs, T., Sonnentag, O., Ueyama, M., Voigt, C., Aurela, M., Boike, J., Celis, G., Chae, N., Christensen, T. R., Bret-Harte, M. S., Dengel, S., Dolman, H., Edgar, C. W., Elberling, B., Euskirchen, E., Grelle, A., Hatakka, J., Humphreys, E., Järveoja, J., Kotani, A., Kutzbach, L., Laurila, T., Lohila, A., Mammarella, I., Matsuura, Y., Meyer, G., Nilsson, M. B., Oberbauer, S. F., Park, S.-J., Petrov, R., Prokushkin, A. S., Schulze, C., St.Louis, V. L., Tuittila, E.-S., Tuovinen, J.-P., Quinton, W., Varlagin, A., Zona, D., and Zyryanov, V. I.
Detection of planktonic coenzyme factor 430 in a freshwater lake: Small-scale analysis for probing archaeal methanogenesis Progress in Earth and Planetary Science,8:62 2021(Oct.) Author:Urai, A., Matsushita, M., Park, H.-D., Imachi, H., Ogawara, M., Iwata, H., Kaneko, M., Ogawa, N. O., Ohkouchi, N., Takano, Y.
Gap-filling eddy covariance methane fluxes: Comparison of machine learning model predictions and uncertainties at FLUXNET-CH4 wetlands Agricultural and Forest Meteorology,308-309:108528 2021(Jul.) Author:Irvin, J., Zhou, S., McNicol, G., Lu, F., Liu, V., Fluet-Chouinard, E., Ouyang, Z., Knox, S. H., Lucas-Moffat, A., Trotta, C., Papale, D., Vitale, D., Mammarella, I., Alekseychik, P., Aurela, M., Avati, A., Baldocchi, D., Bansal, S., Bohrer, G., Campbell, D. I., Chen, J., Chu, H., Dalmagro, H. J., Delwiche, K. B., Desai, A. R., Euskirchen, E., Feron, S., Goeckede, M., Heimann, M., Helbig, M., Helfter, C., Hemes, K. S., Hirano, T., Iwata, H., Jurasinski, G., Kalhori, A., and co-authros
Statistical upscaling of ecosystem CO2 fluxes across the terrestrial tundra and boreal domain: regional patterns and uncertainties Global Change Biology,27:4040-4059 2021(May) Author:Virkkala, A.-M., Aalto, J., Rogers, B. M., Tagesson, T., Treat, C. C., Natali, S. M., Watts, J. D., Potter, S., Lehtonen, A., Mauritz, M., Schuur, E. A. G., Kochendorfer, J., Zona, D., Oechel, W., Kobayashi, H., Humphreys, E., Goeckede, M., Iwata, H., Lafleur, P., Euskirchen, E. S., Bokhorst, S., Marushchak, M., Martikainen, P. J., Elberling, B., Voigt, C., Biasi, C., Sonnentag, O., Parmentier, F.-J. W., Ueyama, M., Celis, G., St.Loius, V. L., Emmerton, C. A., Peichl, M., Chi, J., and co-authors
Spring onsets of a young forest in interior Alaska determined based on time-lapse camera and eddy covariance measurements Journal of Agricultural Meteorology,77(3):190-199 2021(May) Author:Kawashima, S., Ueyama, M., Okamura, M., Harazono, Y., Iwata, H., and Kobayashi, H.
FLUXNET-CH4: A global, multi-ecosystem dataset and analysis of methane seasonality from freshwater wetlands Earth System Science Data,13:3607-3689 2021(May) Author:Delwiche, K. B., Knox, S. H., Malhotra, A., Fluet-Chouinard, E., McNicol, G., Feron, S., Ouyang, Z., Papale, D., Trotta, C., Canfora, E., Cheah, Y.-W., Christianson, D., Alberto, M. C. R., Alekseychik, P., Aurela, M., Baldocchi, D., Bansal, S., Billesbach, D. P., Bohrer, G., Bracho, R., Buchmann, H., Campbell, D. I., Celis, G., Chen, J., Chen, W., Chu, H., Dalmagro, H. J., Dengel, S., Desai, A. R., Detto, M., Dolman, H., Eichelmann, E., Euskirchen, E., Famulari, D., Fuchs, K., and co-authors
Identifying dominant environmental predictors of freshwater wetland methane fluxes across diurnal to seasonal time scales Global Change Biology,27:3582-3604 2021(May) Author:Knox, S. H., Bansal, S., McNicol, G., Schafer, K., Sturtevant, C., Ueyama, M., Valach, A. C., Baldocchi, D., Delwiche, K., Desai, A. R., Euskirchen, E., Liu, J., Lohila, A., Malhotra, A., Melling, L., Riley, W., Runkle, B. R. K., Turner, J., Vargas, R., Zhu, Q., Alto, T., Fluet-Chouinard, E., Goeckede, M., Melton, J. R., Sonnentag, O., Vesala, T., Ward, E., Zhang, Z., Feron, S., Ouyang, Z., Alekseychik, P., Aurela, M., Bohrer, G., Campbell, D. I., Chen, J., Chu, H., and co-authors
Substantial hysteresis in emergent temperature sensitivity of global wetland CH4 emissions Nature Communications,12:2266 2021(Apr.) Author:Chang, K.-Y. , Riley, W., Knox, S., Jackson, R., McNicol, G., Poulter, B., Aurela, M., Baldocchi, D., Bansal, S., Bohrer, G., Campbell, D., Cescatti, A., Chu, H., Delwiche, K., Desai, A., Euskirchen, E., Friborg, T., Gockede, M., Helbig, M., Hemes, K., Hirano, T., Iwata, H., Kang, M., Keenan, T., Krauss, K., Lohila, A., Mammarella, I., Mitra, B., Miyata, A., Nilsson, M. B., Noormets, A., Oechel, W., Papale, D., Peichl, M., Reba, M., Rinne, J., Runkle, B., Ryu, Y., Sachs, T., and co-authors
Lessons learned from more than a decade of greenhouse gas flux measurements at boreal forests in eastern Siberia and interior Alaska Polar Science,27:100607 2021(Mar.) Author:Hiyama, T., Ueyama, M., Kotani, A., Iwata, H., Nakai, T., Okamura, M., Ohta, T., Harazono, Y., Petrov, R. E., and Maximov, T. C.
Representativeness of eddy-covariance flux footprints for areas surrounding AmeriFlux sites Agricultural and Forest Meteorology,301-302:108350 2021(Feb. 14) Author:Chu, H., Luo, X., Ouyang, Z., Chan, W. S., Dengel, S., Biraud, S. C., Torn, M. S., Metzger, S., Kumar, J., Arain, M. A., Arkebauer, T. J., Baldocchi, D., Bernacchi, C., Billesbach, D. and co-authors
Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems Environmental Research Letters,16:015001 2020(Dec. 18) Author:Kropp, H., Loranty, M. M., Natali, S. M., Kholodov, A. L., Rocha, A. V., Myers-Smith, I. H., Abbott, B. W., Abermann, J., Blanc-Betes, D., Blok, D., Blume-Werry, G., Boike, J. and co-authors
Cooling and moistening of the planetary boundary layer in interior Alaska due to a postfire change in surface energy exchange Journal of Geophysical Research - Atmospheres,125:e2020JD032968 2020(Sep. 09) Author:Ueyama, M., Yamamori, T., Iwata, H., and Harazono, Y.
Temporal and spatial variations in methane emissions from the littoral zone of a shallow mid-latitude lake with steady methane bubble emission areas Agricultural and Forest Meteorology,295:108184 2020(Sep. 03) Author:Iwata, H., Nakazawa, K., Sato, H., Itoh, M., Miyabara, Y., Hirata, R., Takahashi, Y., Tokida, T., and Endo, R.
Environmental controls of diffusive and ebullitive methane emissions at a sub-daily time scale in the littoral zone of a mid-latitude shallow lake Journal of Geophysical Research - Biogeosciences,125:e2020JG005753 2020(Aug. 24) Author:Taoka, T., Iwata, H., Hirata, R., Takahashi, Y., Miyabara, Y., and Itoh, M.
The biophysical climate mitigation potential of boreal peatlands during the growing season Environmental Research Letters 2020(Aug. 01) Author:Helbig, M., Waddington, J., Alekseychik, P., Amiro, B., Aurela, M., Barr, A., Black, T., Carey, S., Chen, J., Chi, J., Desai, A., Dunn, A., Euskirchen, E., Flanagan, L., Friborg, T. and co-authors
Comprehensive assessments of carbon dynamics in an intermittently-irrigated rice paddy Agricultural and Forest Meteorology,285-286:107933 2020(May) Author:Hwang, Y., Ryu, Y., Huang, Y., Kim, J., Iwata, H., and Kang, M.
Increasing contribution of peatlands to boreal evapotranspiration in a warming climate Nature Climate Change,10:555-560 2020(May) Author:Helbig, M., Waddington, J. M., Alekseychik, P., Amiro, B. D., Aurela, M., Barr, A. G., Black, T. A., Blanken, P. D., Carey, S. K., Chen, J., Chi, J., Desai, A. R., Dunn, A., and co-authors
FLUXNET-CH4 Synthesis Activity: Objectives, Observations, and Future Directions Bulletin of the American Meteorological Society,100:2607-2632 2019(Dec.) Author:Knox, S. H., Jackson, R. B., Poulter, B, McNicol, G., Fluet-Chouinard, E., Zhang, Z., Hugelius, G., Bousquet, P., Canadell, J. G., Saunois, M., Papale, D., Chu, H., Keenan, T. F., Baldocchi, D., Mammarella, I., Trotta, C., Aurela, M., Bohrer, G., Campbell, D., Cescatti, A., Chamberlain, S., Chen, J., Dengel, S., Desai, A. R., Euskirchen, E., Friborg, T., Goded, I., Goeckede, M., Heimann, M., Helbig, M., Hirano, T., Hollinger, D., Iwata, H., Kang, M., Klatt, J., Krauss, K. W., Kutzbach, L., Lohila, A., Magliulo, V., Mitra, B., Morin, T. H., Nilsson, M. B., Niu, S., Noormets, A., Oechel, W. C., Peichl, M., Peltola, O., Reba, M. L., Richardson, A., Runkle, B. R. K., Ryu, Y., Sachs, T., Schäfer, K. V. R., Schmid, H. P., Shurpali, H., Sonnentag, O., Tang, A. C. I., Torn, M., Ueyama, M., Vargas, R., Vesala, T., Ward, E. J., Windham-Myers, L., Wohlfahrt, G., and Zona, D.
Carbon dioxide balance in early-successional forests after forest fires in interior Alaska Agricultural and Forest Meteorology,275:196-207 2019(May) Author:Ueyama, M., Iwata, H., Nagano, H., Tahara, N., Iwama, C., Harazono, Y.
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.
講演・口頭発表等 Estimation of Methane Emissions from Lake Using Satellite Observation and Machine Learning Method AsiaFlux 2023 Workshop 2023(Nov. 30) Presenter:Oda, M., Yang, W., Yamada, M., Iwata, H.
Seven-year variability in methane release from a shallow eutrophic lake in Japan AsiaFlux 2023 Workshop 2023(Nov. 29) Presenter:Yamada, M., Iwata, H., Miyabara, Y., Park, H.-D., Ito, M., Hirata, R., Takahashi, Y., Sawano, K.
Responses of Methanogenesis in Eutrophic Lake Sediment to Different Autochthonous Organic Matter Additions AsiaFlux 2023 Workshop 2023(Nov. 29) Presenter:Yang, C. J., Iwata, H., Park, H.-D., Miyabara, Y., Urai, A., Itoh, M., Takano, Y.
異なる自生性有機物の添加に対する富栄養湖堆積物中のメタン生成応答の違い 日本農業気象学会関東甲信越支部2022年度例会 2022(Nov. 25) Presenter:Yang Chun Jet、岩田拓記、朴虎東、 宮原裕一、伊藤雅之
Inverse estimation of photosynthetic physiological characteristics of an alpine dwarf pine ecosystem using eddy-covariance fluxes AsiaFlux Workshop 2022 2022(Sep. 20) Presenter:Tanabe, K., Iwata, H., Miyama, T., Murayama, S., Saitoh, T. M.
The effect of land surface change after forest fires on convective rainfall in Alaskan boreal forests AsiaFlux Workshop 2022 2022(Sep. 20) Presenter:Ochiai, Y., Iwata, H., Ueyama, M., Harazono, Y.
Vegetation type is an important predictor of the arctic terrestrial summer surface energy budget EGU 2022 2022(May) Presenter:Oehri, J., Schaepman-Strub, G., Kim, J.-S., Grysko, R., Kropp, H., Grünberg, I., Zemlianskii, V., Sonnentag, O., Euskirchen, E. S., Chacko, M. R., ArcticSEB - Synthesis Team
渦相関法で測定された北方湖からのメタン放出の経路分離とチャンバー・バブルトラップ法との比較 日本農業気象学会2022年全国大会 2022(Mar. 22) Presenter:岩田拓記, Joachim Jansen, Patrick Crill, Thomas Friborg, Erik Sahlee
Factors for local scale spatiotemporal variation of spring onsets of vegetation in interior Alaska PAWCs International Symposium 2022(Mar. 08) Presenter:Kawashima, S., Ueyama, M., Harazono, Y., Iwata, H., Kobayashi, H.
Methane emissions from the forest floor of a black spruce forest on permafrost in interior Alaska PAWCs International Symposium 2022(Mar. 08) Presenter:Ueyama, M., Iwata, H., Endo, R., Harazono, Y.
Factors for geographical distribution of spring onsets of vegetation in interior Alaska iLEAPS-Japan研究集会2021 2021(Dec. 09) Presenter:Kawashima, S., Ueyama, M., Harazono, Y., Iwata, H., and Kobayashi, H.
What explains the year-to-year variation in the start and end of the photosynthetic growing season of boreal black spruce forests? AGU Fall Meeting 2021 2021(Dec.) Presenter:El-Amine, M., Roy, A., Koebsch, F., Baltzer, J. L., Barr, A., Black, T. A., Ikawa, H., Iwata, H., Ueyama, M., and Sonnentag, O.
Scaling up rice methane fluxes in monsoon Asia through data-driven model AGU fall meeting 2020 2020(Dec.) Presenter:Yang, Z., Jackson, R. B., Runkle, B., Papale, D., McNicol, G., Fluet-Chouinard, E., Knox, S., Alberto, M. C. R., Baldocchi, D. D., Cescatti, A., Chen, C.-L., Dong, J., Guo, H., and co-authors
Methane emissions from rice production: a synthesis of 24 eddy covariance sites AGU Fall Meeting 2020 2020(Dec.) Presenter:Runkle, B., Yang, Z., Jackson, R. B., Knox, S., McNicol, G., Papale, D., Cescatti, A., Iwata, H., Ryu, Y., Kang, M., Kim, J., Zhang, Y., Ju, W., Alberto, M. C. R., Baldocchi, D. D., and co-authors
Peatland-dominated boreal ecoregions at risk of drying in a warmer climate AGU Fall Meeting 2019 2019(Dec.) Presenter:Helbig, M., Waddington, J. M., Alekseychik, P., Amiro, B. D., Aurela, M., Barr, A., Black, T. A., Blanken, P., Carey, S. K., Chen, J., Chi, J., Desai, A. R., Dunn, A. L., Euskirchen, E. S., Friborg, T., Flanagan, L. B., Forbrich, I., Grelle, A., Harder, S. R., Heliasz, M., Humphreys, E., Ikawa, H., Iwata, H., Isabelle, P.-E., Jassal, R., Kurbatova, J., Korkiakoski, M., Kutzbach, L., Lindroth, A., Ohta, T., Lofvenius, M. O., Lohila, A., Maximov, T. C., Mammarella, I., Marsh, P., Melton, J., Moore, P., Nadeau, D., Nicholls, E., Nilsson, M. B., Peichl, M., Petrone, R. M., Petrov, R. E., Quinton, W. L., Roulet, N. T., Reed, D. E., Runkle, B., Rutgersson, A., Sahlee, E., Sonnentag, O., Strachan, I. B., Taillardat, P., Tuittila, E.-S., Tuovinen, J.-P., Turner, J., Ueyama, M., Varlagin, A., Wilmking, M. and Wofsy, S. C.
Driving Factors of Changes in Evapotranspiration from a Red Pine Ecosystem AsiaFlux Workshop 2019 2019(Oct.) Presenter:Suzuki, T. Iwata, H., Takanashi, S., Miyama, T., Mizoguchi, Y., Okano, M., Kominami, Y., Yoshifuji, N., and Nakano, T.
The controlling factors of diffusive and ebullitive methane emission on sub-daily time scale at a mid-latitude shallow lake AsiaFlux Workshop 2019 2019(Oct.) Presenter:Taoka, T., Iwata, H., Miyabara, Y., Hirata, R., Takahashi, Y.
Simulation of methane dynamics in a mid-latitude eutrophic lake with constraints using incubation data AsiaFlux Workshop 2019 2019(Oct.) Presenter:Iwata, H., Nakano, S., Stepanenko, V., Kobayashi, D., Taoka, T., Itoh, M., Miyabara, Y., Hirata, R., and Takahashi, Y.
Estimation of greenhouse gas budget over high-latitude ecosystems using a process-based ecosystem model, VISIT AsiaFlux Workshop 2019 2019(Oct.) Presenter:Okamura, M., Ueyama, M., Ito, A., Ichii, K., Iwata, H., Euskirchen, E. S., Goeckede, M., Sonnentag, O., Flanagan, L. B., Harazono, Y., Helbig, M., Hirano, T., Oechel, W. C., and Zona, D.
Estimating northern ecosystems methane flux based on a satellite data driven model, TCF AsiaFlux Workshop 2019 2019(Oct.) Presenter:Luo, J., Ueyama, M., Okamura, M., Watts, J. D., Iwata, H., Euskirchen, E. S., Goeckede, M., Sonnentag, O., Flanagan, L. B., Harazono, Y., Helbig, M., Hirano, T., Oechel, W. C., and Zona, D.
Long term variation of CO2 flux at cool temperate red pine forest in Japan AsiaFlux Workshop 2019 2019(Oct.) Presenter:Kominami, Y., Miyama, T., Yoshifuji, N., Okano, M., Yasuda, Y., Yamanoi, K., Mizoguchi, Y., Takanashi, S., Kitamura, K., Nakano, T., Yasuda, T., Wada, R., Iwata, H., Watanabe, T., Nakai, Y., Ohtani, Y.
Estimating CH4 fluxes across high latitude ecosystems using VISIT model iLEAPS/IGAC-Japan meeting 2019 2019(Sep.) Presenter:Okamura, M., Ueyama, M., Ito, A., Ichii, K., Iwata, H., Euskirchen, E. S., Goeckede, M., Sonnentag, O., Flanagan, L. B., Harazono, Y., Helbig, M., Hirano, T., Oechel, W. C., Zona, D.
Current status of CO2 balance in the Arctic black spruce forest based on the long-term observation and the future progress Korean Society of Agricultural and Forest Meteorology 20th Anniversary Symposium 2019(Aug. 30) Presenter:Harazono, Y., Ueyama, M., Iwata, H., and Hiyama, T.
Search for microbial CH4 production processes in lake sediments and surface water associated with cyanobacterial bloom JpGU-AGU joint meeting 2019 2019(May) Presenter:Matsushita, M., Takano, Y., Imachi, H., Urai, A., Park, H.-D., Iwata, H., Ohkouchi, N.
高緯度生態系に対する生態系モデルVISITのパラメータリゼーション 日本農業気象学会2019年全国大会 2019(Mar.) Presenter:岡村幹太， 植山雅仁，伊藤昭彦，岩田拓記，Goeckede, M., Sonnentag, O., Helbig, M., 原薗芳信，平野高司，Euskirchen, E., Flanagan, L. B., Oechel, W. C., Zona, D.
The influence of vegetation on shallow soil and air temperature coupling: a Pan-Arctic data synthesis 2018 AGU Fall meeting 2018(Dec.) Presenter:Kropp, H., Loranty, M. M., Natali, S., Kholodov, A. L., Abbott, B., Abermann, J., Blanc-Betes, E., Blok, D., Blume-Werry, G., Boike, J., Breen, A. L., Cahoon, S. M. P., Christiansen, C., Douglas, T. A., Elberling, B., Epstein, H. E., Euskirchen, E. S., Frost, G., Goeckede, M., Gough, L., Heijmans, M., Hjort, J., Hoye, T. T., Humphreys, E., Iversen, C. M., Iwata, H., Jones, B. M., Jorgenson, T., Juszak, I., Kim, Y., Lafleur, P., Laundre, J., Lund, M., Mamet, S., Mauritz, M., Michelsen, A., Myers-Smith, I. H., O'Donnell, J., Olefeldt, D., Phoenix, G. K., Rocha, A. V., Romanovsky, V. E., Salmon, V. G., Sannel, B., Schaepman-Strub, G., Smith, S. L., Sonnentag, O., Tape, K. D., Torn, M. S., Vaughn, L. S., Williams, M., Wilson, C. J.
Modeling greenhouse gas budget in the northern ecosystems using a process-based ecosystem model, VIST 2018 AGU Fall meeting 2018(Dec.) Presenter:Okamura, M., Ueyama, M., Ito, A., Iwata, H., Euskirchen, E., Goeckede, M., Sachs, T., Sonnentag, O., Emmerton, C., Flanagan, L., Harazono, Y., Helbig, M., Hirano, T., St. Louis, V., Nadeau, D., Oechel, W., Zona, D.
Constraining methane dynamics modules in ecosystem models using eddy flux measurements at northern ecosystems 2018 AGU Fall meeting 2018(Dec.) Presenter:Ueyama, M., Okamura, M., Ito, A., Iwata, H., Euskirchen, E., Goeckede, M., Sonnentag, O., Emmerton, C., Flanagan, L., Harazono, Y., Helbig, M., Hirano, T., Louis, V. St., Nadeau, D., Oechel, W., Zona, D.
Response of thermal regime of a shallow mid-latitude lake to climate change 2018 AGU Fall meeting 2018(Dec.) Presenter:Kobayashi, D., Iwata, H., Stepanenko, V., and Miyabara, Y.
Eddy covariance and biogeochemical observations of methane dynamics in a shallow mid-latitude lake in Japan OzFlux-AsiaFlux Joint Conference 2018(Aug. 23) Presenter: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) Presenter: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) Presenter: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.) Presenter: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) Presenter: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) Presenter: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) Presenter: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.) Presenter: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.) Presenter: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) Presenter:Iwata, H.
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.) Presenter: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.) Presenter: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.) Presenter: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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