Permafrost Organic Carbon Mobilization from the Watershed to the Colville River Delta
PUBLICATIONS Geophysical Research Letters RESEARCH LETTER Permafrost Organic Carbon Mobilization From the Watershed 10.1002/2017GL075543 to the Colville River Delta: Evidence From 14C Ramped Key Points: Pyrolysis and Lignin Biomarkers • Deposition of soil material in the river channel appeared to be more derived Xiaowen Zhang1,2 , Thomas S. Bianchi1 , Xingqian Cui1,2 , Brad E. Rosenheim3 , from deep old permafrost than 4 5 6 7 surface soils Chien-Lu Ping , Andrea J. M. Hanna , Mikhail Kanevskiy , Kathryn M. Schreiner , 8 • Deposition of permafrost soils at the and Mead A. Allison coast was affected by hydrodynamic sorting, coastal currents, and 1Department of Geological Sciences, University of Florida, Gainesville, FL, USA, 2Department of Earth, Atmospheric and drifting ice Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA, 3College of Marine Science, University of • Degradation and organo-mineral South Florida, St. Petersburg, FL, USA, 4School of Natural Resources and Extension, University of Alaska Fairbanks, Fairbanks, interactions likely played important 5 6 roles in the depth-dependent thermal AK, USA, Institute of Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, USA, Institute of 7 stability of Arctic soils Northern Engineering, University of Alaska Fairbanks, Fairbanks, AK, USA, Large Lakes Observatory, University of Minnesota, Duluth, Duluth, MN, USA, 8The Water Institute of the Gulf, Baton Rouge, LA, USA Supporting Information: • Supporting Information S1 Abstract The deposition of terrestrial-derived permafrost particulate organic carbon (POC) has been Correspondence to: recorded in major Arctic river deltas. However, associated transport pathways of permafrost POC from X. Zhang, the watershed to the coast have not been well constrained.
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