Research field (3)：
Atmospheric and hydrospheric science
, Environmental dynamics
, Agricultural environmental and information engineering
Research keywords (6)：
Micrometeorology
, Carbon and water cycles
, Atmospheric boundary layer
, Eddy covariance method
, Methane exchange
, Wavelet analysis
Research theme for competitive and other funds (9)：
2025 - 2030 炭素の流れの多角的評価を基にした浅い湖の富栄養化に伴うメタン放出応答の解析
2023 - 2026 Latitudinal differences of methane emission from lakes -from tropical to temperate-
2021 - 2026 How does the seasonal and interannual variations in methane emission respond to the eutrophication in a shallow lake?
2018 - 2021 Development of soil moisture model of extremely thin ground surface which is an indicator and influence for occurrence of wind erosion
2017 - 2021 Evaluation of methane emission from a mid-latitude shallow lake using eddy covariance observations and dissolved methane concentration measurements
2014 - 2017 Observation of methane budget and establish of the regional database for Arctic warming studies
2012 - 2017 Evaluation of the response of gas exchange between tropical rainforests and the atmosphere to the climate change based on the long-term tower observation.
2015 - 2017 Evaluation of heat and gas exchanges at the atmosphere-land interface considering the effect of low-frequency transport
2011 - 2016 Prediction of catchment runoff changes based on characterizing a nested structure consisting of the developments of topography, soil and vegetation
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Papers (64)：
Hiroki Iwata, Shunta Kawagishi, Kenshi Takahashi, Yuichi Miyabara, Hirohiko Nagano, Masayuki Itoh, Kazuki Suzuki, Atsushi Urai. Sub-daily variations in nitrous oxide fluxes from the littoral zone of a temperate eutrophic lake. Inland Waters. 2025. 1-50
Masahito Ueyama, Hiroki Iwata, Hirohiko Nagano, Naoki Kukuu, Yoshinobu Harazono. Anomalous wet summers and rising atmospheric CO 2 concentrations increase the CO 2 sink in a poorly drained forest on permafrost. Proceedings of the National Academy of Sciences. 2024
Helbig, M. Boreal Forest Fire Causes Daytime Surface Warming During Summer to Exceed Surface Cooling During Winter in North America. AGU Advances. 2024
Craig R. See, Anna-Maria Virkkala, Susan M. Natali, Brendan M. Rogers, Marguerite Mauritz, Christina Biasi, Stef Bokhorst, Julia Boike, M. Syndonia Bret-Harte, Gerardo Celis, et al. Decadal increases in carbon uptake offset by respiratory losses across northern permafrost ecosystems. Nature Climate Change. 2024. 14. 8. 853-862
Ken'ichi Osaka, Reina Nagata, Moegi Inoue, Masayuki Itoh, Shoko Hosoi-Tanabe, Hiroki Iwata. A simple, safe method for preserving dissolved methane in freshwater samples using benzalkonium chloride. Limnology and Oceanography: Methods. 2024. 22. 8. 536-547
