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- W4376127007 startingPage "064019" @default.
- W4376127007 abstract "Abstract In the Arctic waterbodies are abundant and rapid thaw of permafrost is destabilizing the carbon cycle and changing hydrology. It is particularly important to quantify and accurately scale aquatic carbon emissions in arctic ecosystems. Recently available high-resolution remote sensing datasets capture the physical characteristics of arctic landscapes at unprecedented spatial resolution. We demonstrate how machine learning models can capitalize on these spatial datasets to greatly improve accuracy when scaling waterbody CO 2 and CH 4 fluxes across the YK Delta of south-west AK. We found that waterbody size and contour were strong predictors for aquatic CO 2 emissions, attributing greater than two-thirds of the influence to the scaling model. Small ponds (<0.001 km 2 ) were hotspots of emissions, contributing fluxes several times their relative area, but were less than 5% of the total carbon budget. Small to medium lakes (0.001–0.1 km 2 ) contributed the majority of carbon emissions from waterbodies. Waterbody CH 4 emissions were predicted by a combination of wetland landcover and related drivers, as well as watershed hydrology, and waterbody surface reflectance related to chromophoric dissolved organic matter. When compared to our machine learning approach, traditional scaling methods that did not account for relevant landscape characteristics overestimated waterbody CO 2 and CH 4 emissions by 26%–79% and 8%–53% respectively. This study demonstrates the importance of an integrated terrestrial-aquatic approach to improving estimates and uncertainty when scaling C emissions in the arctic." @default.
- W4376127007 created "2023-05-12" @default.
- W4376127007 creator A5001428193 @default.
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- W4376127007 creator A5065731161 @default.
- W4376127007 creator A5067316986 @default.
- W4376127007 creator A5078568413 @default.
- W4376127007 date "2023-05-19" @default.
- W4376127007 modified "2023-09-30" @default.
- W4376127007 title "Scaling waterbody carbon dioxide and methane fluxes in the arctic using an integrated terrestrial-aquatic approach" @default.
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- W4376127007 doi "https://doi.org/10.1088/1748-9326/acd467" @default.