| Biogeochemistry of nitrous oxide in groundwater in a forested ecosystem elucidated by nitrous oxide isotopomer measurements K Koba, K Osaka, Y Tobari, S Toyoda, N Ohte, M Katsuyama, N Suzuki, ... Geochimica et Cosmochimica Acta 73 (11), 3115-3133, 2009 | 105 | 2009 |
| Spatial distribution of nitrate sources of rivers in the Lake Biwa watershed, Japan: controlling factors revealed by nitrogen and oxygen isotope values N Ohte, I Tayasu, A Kohzu, C Yoshimizu, K Osaka, A Makabe, K Koba, ... Water Resources Research 46 (7), 2010 | 79 | 2010 |
| Hydrological influences on spatiotemporal variations of δ15N and δ18O of nitrate in a forested headwater catchment in central Japan: Denitrification plays a … K Osaka, N Ohte, K Koba, C Yoshimizu, M Katsuyama, M Tani, I Tayasu, ... Journal of Geophysical Research: Biogeosciences 115 (G2), 2010 | 62 | 2010 |
| Identification of phosphorus sources in a watershed using a phosphate oxygen isoscape approach T Ishida, Y Uehara, T Iwata, AP Cid-Andres, S Asano, T Ikeya, K Osaka, ... Environmental science & technology 53 (9), 4707-4716, 2019 | 51 | 2019 |
| Hydrologic controls on nitrous oxide production and consumption in a forested headwater catchment in central Japan K Osaka, N Ohte, K Koba, M Katsuyama, T Nakajima Journal of Geophysical Research: Biogeosciences 111 (G1), 2006 | 35 | 2006 |
| Effects of soil water status on the spatial variation of carbon dioxide, methane and nitrous oxide fluxes in tropical rain-forest soils in Peninsular Malaysia M Itoh, Y Kosugi, S Takanashi, S Kanemitsu, K Osaka, Y Hayashi, M Tani, ... Journal of Tropical Ecology 28 (6), 557-570, 2012 | 27 | 2012 |
| Influence of bedrock groundwater on streamflow characteristics in a volcanic catchment M Fujimoto, N Ohte, M Kawasaki, K Osaka, M Itoh, I Ohtsuka, M Itoh Hydrological Processes 30 (4), 558-572, 2016 | 24 | 2016 |
| Nitrogen availability in the taiga forest ecosystem of northeastern Siberia AS Popova, N Tokuchi, N Ohte, MU Ueda, K Osaka, TC Maximov, ... Soil Science and Plant Nutrition 59 (3), 427-441, 2013 | 23 | 2013 |
| Upward diffusion of nitrous oxide produced by denitrification near shallow groundwater table in the summer: a lysimeter experiment K Minamikawa, S Nishimura, Y Nakajima, K Osaka, T Sawamoto, K Yagi Soil Science and Plant Nutrition 57 (5), 719-732, 2011 | 23 | 2011 |
| Non-carcinogenic risk assessment of groundwater in South Gobi, Mongolia K Nakazawa, O Nagafuchi, K Okano, K Osaka, E Hamabata, ... Journal of Water and Health 14 (6), 1009-1018, 2016 | 22 | 2016 |
| Effect of dissolved oxygen on nitrogen and phosphorus fluxes from lake sediments and their thresholds based on incubation using a simple and stable dissolved oxygen control method K Osaka, R Yokoyama, T Ishibashi, N Goto Limnology and Oceanography: Methods 20 (1), 1-14, 2022 | 19 | 2022 |
| Factors characterizing phosphate oxygen isotope ratios in river water: an inter-watershed comparison approach J Ide, T Ishida, AP Cid-Andres, K Osaka, T Iwata, T Hayashi, M Akashi, ... Limnology 21 (3), 365-377, 2020 | 18 | 2020 |
| Nitrogen and oxygen isotope enrichment factors of nitrate at different denitrification rates in an agricultural soil K Osaka, Y Nakajima, K Suzuki, S Eguchi, H Katou Soil Science and Plant Nutrition 64 (5), 558-565, 2018 | 18 | 2018 |
| Evaluation of nutrient loads from a mountain forest including storm runoff loads T Kunimatsu, T Otomori, K Osaka, E Hamabata, Y Komai Water science and technology 53 (2), 79-91, 2006 | 18 | 2006 |
| Atmospheric nitrate leached from small forested watersheds during rainfall events: Processes and quantitative evaluation K Osaka, T Kugo, N Komaki, T Nakamura, K Nishida, O Nagafuchi Journal of Geophysical Research: Biogeosciences 121 (8), 2030-2048, 2016 | 16 | 2016 |
| Spatial and temporal variability of soil respiration rate at a small watershed revegetated with Japanese cypress. T Mitani, Y Kosugi, K Osaka, S Ohkubo, S Takanashi, M Tani | 14 | 2006 |
| Photosynthesis and respiration of managed C3 turfgrass fields under various light conditions 小杉緑子， 尾坂兼一， 伊藤雅之， 高梨聡， 松原隆志 農業気象 66 (3), 163-171, 2010 | 9 | 2010 |
| Separate estimation of N export into baseline N leakage without disturbance and N loss due to insect defoliation in a pine forest watershed in central Japan T Naoko, O Nobuhito, O Ken’ichi, K Masanori Environmental monitoring and assessment 185 (1), 855-863, 2013 | 8 | 2013 |
| Assessing the changes in river water quality across a land-use change (forest to oil palm plantation) in peninsular Malaysia using the stable isotopes of water and nitrate M Itoh, K Osaka, K Iizuka, Y Kosugi, M Lion, S Shiodera Science of the Total Environment 859, 160319, 2023 | 7 | 2023 |
| Nitrogen contamination of shallow groundwater in Katmandu Valley, Nepal T NAKAMURA, KEI NISHIDA, F KAZAMA, KENI OSAKA, SK CHAPAGAIN 日本水文科学会誌 44 (4), 197-206, 2014 | 7 | 2014 |
Nobuhito OhteProfessor of Biosphere Informatics, Kyoto UniversityVerified email at i.kyoto-u.ac.jp
