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Sökning: WFRF:(Tank Suzanne E.)

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  • Abbott, Benjamin W., et al. (författare)
  • Biomass offsets little or none of permafrost carbon release from soils, streams, and wildfire : an expert assessment
  • 2016
  • Ingår i: Environmental Research Letters. - : IOP Publishing: Open Access Journals / IOP Publishing. - 1748-9326 .- 1748-9326. ; 11:3
  • Tidskriftsartikel (refereegranskat)abstract
    • As the permafrost region warms, its large organic carbon pool will be increasingly vulnerable to decomposition, combustion, and hydrologic export. Models predict that some portion of this release will be offset by increased production of Arctic and boreal biomass; however, the lack of robust estimates of net carbon balance increases the risk of further overshooting international emissions targets. Precise empirical or model-based assessments of the critical factors driving carbon balance are unlikely in the near future, so to address this gap, we present estimates from 98 permafrost-region experts of the response of biomass, wildfire, and hydrologic carbon flux to climate change. Results suggest that contrary to model projections, total permafrost-region biomass could decrease due to water stress and disturbance, factors that are not adequately incorporated in current models. Assessments indicate that end-of-the-century organic carbon release from Arctic rivers and collapsing coastlines could increase by 75% while carbon loss via burning could increase four-fold. Experts identified water balance, shifts in vegetation community, and permafrost degradation as the key sources of uncertainty in predicting future system response. In combination with previous findings, results suggest the permafrost region will become a carbon source to the atmosphere by 2100 regardless of warming scenario but that 65%-85% of permafrost carbon release can still be avoided if human emissions are actively reduced.
  • Tank, Suzanne E., et al. (författare)
  • Beyond respiration : Controls on lateral carbon fluxes across the terrestrial-aquatic interface
  • 2018
  • Ingår i: Limnology and Oceanography Letters. - : Wiley Online Library. - 2378-2242. ; 3:3, s. 76-88
  • Tidskriftsartikel (refereegranskat)abstract
    • Understanding what controls the lateral flux of organic and inorganic carbon from landscapes to surfacewaters is key to fully understanding terrestrial ecosystem carbon balances, the biogeochemistry of fresh-waters, and how the hydrologically-mediated movement of carbon between these ecosystems may be alteredby global change. In this paper, we synthesize current knowledge and identify major knowledge gaps in ourunderstanding of land-to-water fluxes of dissolved and particulate organic carbon, CO2, and bicarbonate byexploring: (1) how variations in soil carbon stocks affect dissolved and gaseous carbon production in the soilprofile and transport via terrestrial-aquatic flow paths, and (2) the effect of global change on these lateral car-bon fluxes. Our aim is to develop a roadmap to guide future research on terrestrial-aquatic linkages in thecarbon cycle within the context of changes in climate, global biogeochemical cycles, and land use.
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