GSTDTAP  > 气候变化
DOI10.1111/gcb.14289
Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scaleA case study from the Mackenzie Delta, Canada
Kohnert, Katrin1; Juhls, Bennet1,8; Muster, Sina2; Antonova, Sofia2,3; Serafimovich, Andrei1; Metzger, Stefan4,5; Hartmann, Joerg6; Sachs, Torsten1,7
2018-09-01
发表期刊GLOBAL CHANGE BIOLOGY
ISSN1354-1013
EISSN1365-2486
出版年2018
卷号24期号:9页码:3976-3989
文章类型Article
语种英语
国家Germany; USA
英文摘要

Waterbodies in the arctic permafrost zone are considered a major source of the greenhouse gas methane (CH4) in addition to CH4 emissions from arctic wetlands. However, the spatio-temporal variability of CH4 fluxes from waterbodies complicates spatial extrapolation of CH4 measurements from single waterbodies. Therefore, their contribution to the CH4 budget of the arctic permafrost zone is not yet well understood. Using the example of two study areas of 1,000km(2) each in the Mackenzie Delta, Canada, we approach this issue (i) by analyzing correlations on the landscape scale between numerous waterbodies and CH4 fluxes and (ii) by analyzing the influence of the spatial resolution of CH4 flux data on the detected relationships. A CH4 flux map with a resolution of 100m was derived from two aircraft eddy-covariance campaigns in the summers of 2012 and 2013. We combined the CH4 flux map with high spatial resolution (2.5m) waterbody maps from the Permafrost Region Pond and Lake Database and classified the waterbody depth based on Sentinel-1 SAR backscatter data. Subsequently, we reduced the resolution of the CH4 flux map to analyze if different spatial resolutions of CH4 flux data affected the detectability of relationships between waterbody coverage, number, depth, or size and the CH4 flux. We did not find consistent correlations between waterbody characteristics and the CH4 flux in the two study areas across the different resolutions. Our results indicate that waterbodies in permafrost landscapes, even if they seem to be emission hot spots on an individual basis or contain zones of above average emissions, do currently not necessarily translate into significant CH4 emission hot spots on a regional scale, but their role might change in a warmer climate.


英文关键词airborne eddy-covariance Arctic CH4 lakes ponds remote sensing Sentinel-1 TerraSAR-X
领域气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000441746900010
WOS关键词NORTHWEST-TERRITORIES ; FLUX MEASUREMENTS ; NORTHERN LAKES ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; BOREAL LAKES ; ARCTIC LAKES ; PONDS ; MODEL ; THAW
WOS类目Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/17341
专题气候变化
资源环境科学
作者单位1.GFZ German Res Ctr Geosci, Potsdam, Germany;
2.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Potsdam, Germany;
3.Heidelberg Univ, Dept Geog, GISci, Heidelberg, Germany;
4.Battelle Mem Inst, Natl Ecol Observ Network, Boulder, CO USA;
5.Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI USA;
6.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Bremerhaven, Germany;
7.TU Braunschweig, Inst Flight Guidance, Braunschweig, Germany;
8.Free Univ Berlin, Inst Space Sci, Dept Earth Sci, Berlin, Germany
推荐引用方式
GB/T 7714
Kohnert, Katrin,Juhls, Bennet,Muster, Sina,et al. Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scaleA case study from the Mackenzie Delta, Canada[J]. GLOBAL CHANGE BIOLOGY,2018,24(9):3976-3989.
APA Kohnert, Katrin.,Juhls, Bennet.,Muster, Sina.,Antonova, Sofia.,Serafimovich, Andrei.,...&Sachs, Torsten.(2018).Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scaleA case study from the Mackenzie Delta, Canada.GLOBAL CHANGE BIOLOGY,24(9),3976-3989.
MLA Kohnert, Katrin,et al."Toward understanding the contribution of waterbodies to the methane emissions of a permafrost landscape on a regional scaleA case study from the Mackenzie Delta, Canada".GLOBAL CHANGE BIOLOGY 24.9(2018):3976-3989.
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