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Usability of water surface reflectance for the determination of riverine dissolved methane during extreme flooding in northeastern Siberia
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Title: | Usability of water surface reflectance for the determination of riverine dissolved methane during extreme flooding in northeastern Siberia |
Authors: | Morozumi, Tomoki Browse this author →KAKEN DB | Shingubara, Ryo Browse this author | Murase, Jun Browse this author →KAKEN DB | Nagai, Shin Browse this author →KAKEN DB | Kobayashi, Hideki Browse this author →KAKEN DB | Takano, Shinya Browse this author | Tei, Shunsuke Browse this author →KAKEN DB | Fan, Rong Browse this author | Maximov, Trofim C. Browse this author | Sugimoto, Atsuko Browse this author →KAKEN DB |
Keywords: | Flooding | Dissolved methane concentration | Arctic | Landsat 8 |
Issue Date: | Sep-2019 |
Publisher: | Elsevier |
Journal Title: | Polar Science |
Volume: | 21 |
Start Page: | 186 |
End Page: | 194 |
Publisher DOI: | 10.1016/j.polar.2019.01.005 |
Abstract: | An extreme flooding event occurred from June to July 2017 in the Indigirka River lowland of northeastern Siberia. We used Landsat 8 satellite surface reflectance data to detect the flood inundation area and extract water color for delineating different water sources. We also took direct samples of dissolved methane concentrations in the river water. Relatively high concentrations of dissolved methane (0.7–1.1 μmol l−1, or μM) were observed in four tributary areas in 2017 during the flood's recession, while the values remained low in the main channel (0.2–0.3 μM). In contrast, the concentrations of dissolved methane were low in both the main channel and tributaries during the non-flood period of 2016 (0.1–0.2 μM). We then used 2017 satellite reflectance data with an empirical model to estimate the spatial differences of dissolved methane concentration for water sources contributing to the methane-poor main channel and methane-rich tributaries and applied the results to the calculation of riverine methane in the study region (approx. 200 × 300 km). This approach to estimating dissolved methane concentrations using satellite reflectance can provide a new tool for environmental monitoring of flood events in remote areas. |
Rights: | © 2019, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | https://creativecommons.org/licenses/by-nc-sa/4.0/ |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/82596 |
Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 両角 友喜
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