Usability of water surface reflectance for the determination of riverine dissolved methane during extreme flooding in northeastern Siberia

被引：9

作者：

Morozumi, Tomoki ^{[1
,2
]}

Shingubara, Ryo ^{[1
,10
]}

Murase, Jun ^{[3
]}

Nagai, Shin ^{[4
,5
]}

Kobayashi, Hideki ^{[4
,5
]}

Takano, Shinya ^{[1
]}

Tei, Shunsuke ^{[2
,6
]}

Fan, Rong ^{[1
,2
]}

Maximov, Trofim C. ^{[7
,8
]}

Sugimoto, Atsuko ^{[2
,6
,9
]}

机构：

[1] Hokkaido Univ, Grad Sch Environm Sci, N10W5, Sapporo, Hokkaido 0600810, Japan

[2] Hokkaido Univ, Arctic Res Ctr, N21W11, Sapporo, Hokkaido 0010021, Japan

[3] Nagoya Univ, Grad Sch Bioagr Sci, Chikusa Ku, Nagoya, Aichi 4648601, Japan

[4] Japan Agcy Marine Earth Sci & Technol, Res & Dev Ctr Global Change, Kanazawa Ku, 3173-25 Showa Machi, Yokohama, Kanagawa 2360001, Japan

[5] Japan Agcy Marine Earth Sci & Technol, Inst Arctic Climate & Environm Res, Kanazawa Ku, 3173-25 Showa Machi, Yokohama, Kanagawa 2360001, Japan

[6] Hokkaido Univ, Fac Environm Earth Sci, N10W5, Sapporo, Hokkaido 0600810, Japan

[7] Russian Acad Sci, Siberian Branch, Inst Biol Problems Cryolithozone, 41 Lenin Ave, Yakutsk 677980, Russia

[8] North Eastern Fed Univ, Yakutsk 677000, Russia

[9] Hokkaido Univ, Global Inst Collaborat Res & Educ, Global Stn Arctic Res, N21W11, Sapporo, Hokkaido 0010021, Japan

[10] Nagoya Univ, Grad Sch Environm Studies, Chikusa Ku, Nagoya, Aichi 4648601, Japan

来源：

POLAR SCIENCE | 2019年 / 21卷

关键词：

Flooding; Dissolved methane concentration; Arctic; Landsat; 8; LENA RIVER; CH4; TUNDRA; CO2; EMISSION; CARBON; PERMAFROST; LANDSCAPE; TRANSPORT; FLUXES;

D O I：

10.1016/j.polar.2019.01.005

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

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 mu mol l(-1), or mu M) 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 mu M). 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 mu M). 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 x 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.

引用

页码：186 / 194

页数：9

共 42 条

[1]

[Anonymous], 2011, Baseline Meteorological Data in Siberia (BMDS) Version 5.0

[2] Riverine coupling of biogeochemical cycles between land, oceans, and atmosphere [J].