Greenhouse gas emissions from diverse Arctic Alaskan lakes are dominated by young carbon

  title={Greenhouse gas emissions from diverse Arctic Alaskan lakes are dominated by young carbon},
  author={Clayton D. Elder and Xiaomei Xu and Jennifer C. Walker and Jordan L. Schnell and Kenneth M. Hinkel and Amy Townsend‐Small and Christopher D. Arp and John W. Pohlman and Benjamin V. Gaglioti and Claudia I. Czimczik},
  journal={Nature Climate Change},
Climate-sensitive Arctic lakes have been identified as conduits for ancient permafrost-carbon (C) emissions and as such accelerate warming. However, the environmental factors that control emission pathways and their sources are unclear; this complicates upscaling, forecasting and climate-impact-assessment efforts. Here we show that current whole-lake CH4 and CO2 emissions from widespread lakes in Arctic Alaska primarily originate from organic matter fixed within the past 3–4 millennia (modern… 
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Negligible cycling of terrestrial carbon in many lakes of the arid circumpolar landscape
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Assessing the Potential for Mobilization of Old Soil Carbon After Permafrost Thaw: A Synthesis of 14C Measurements From the Northern Permafrost Region
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Warming thaws permafrost, releasing carbon that can cause more warming. Radiocarbon, soil carbon, and remote sensing data suggest that 0.2–2.5 Pg of carbon has been emitted from permafrost as CO2 and
Arctic lakes are continuous methane sources to the atmosphere under warming conditions
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Modern to millennium-old greenhouse gases emitted from ponds and lakes of the Eastern Canadian Arctic (Bylot Island, Nunavut)
Abstract. Ponds and lakes are widespread across the rapidly changing permafrost environments. Aquatic systems play an important role in global biogeochemical cycles, especially in greenhouse gas
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Methane and Carbon Cioxide Emissions from 40 Lakes Along a North-South Latitudinal Transect in Alaska
We assessed the relationship between CH4 and CO2 emission modes in 40 lakes along a latitudinal transect in Alaska to physicochemical limnology, geographic characteristics and permafrost soil types
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Climate warming may lead to a positive feedback of increased emissions of CH4 from sediments beneath Arctic lakes, but the contribution of these lakes to the global CH4 budget is poorly quantified.
Methane sources in arctic thermokarst lake sediments on the North Slope of Alaska.
Analysis of the integrated data set revealed that there is biological CH4 production in Siqlukaq at moderate levels, while the very low levels of CH4 detected in Sukok had a mixed origin, with little to no biological Ch4 production.
A shift of thermokarst lakes from carbon sources to sinks during the Holocene epoch
The estimate of about 160 petagrams of Holocene organic carbon in deep lake basins of Siberia and Alaska increases the circumpolar peat carbon pool estimate for permafrost regions by over 50 per cent and potentially negating the climate stabilization provided by thermokarst lakes during the late Holocene.
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Methane bubbling from Siberian thaw lakes as a positive feedback to climate warming
It is found that thawing permafrost along lake margins accounts for most of the methane released from the lakes, and it is estimated that an expansion of thaw lakes between 1974 and 2000, which was concurrent with regional warming, increased methane emissions in the study region by 58 per cent.