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Northern Ecohydrology

Northern Ecohydrology. Jessica M. Cable and W. Robert Bolton International Arctic Research Center (Fairbanks) Environment and Natural Resources Institute (Anchorage) University of Alaska. permafrost. J. Cable. Miriam Jones. J. Cable. J. Cable. J. Cable. L. Hinzman. L Hinzman.

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Northern Ecohydrology

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  1. Northern Ecohydrology Jessica M. Cable and W. Robert Bolton International Arctic Research Center (Fairbanks) Environment and Natural Resources Institute (Anchorage) University of Alaska

  2. permafrost J. Cable Miriam Jones J. Cable J. Cable J. Cable L. Hinzman L Hinzman

  3. freshwater systems in Alaska Map by Robert Simmon D. White

  4. freshwater systems in Alaska climate ecology permafrost hydrology

  5. boreal hydrology How does permafrost distribution and active layer dynamics impact streamflow and soil moisture? Discontinuous warm permafrost region with boreal forest Storage dominated watersheds, on the margins Caribou Poker Creek Research Watershed near Fairbanks, Alaska

  6. boreal hydrologystreamflow Permafrost dominated watersheds - higher specific discharge, lower specific base flow, and longer recessions than low permafrost watersheds

  7. boreal hydrologysoil moisture Permafrost free area Area with permafrost 5cm, organic soil 40cm, mineral soil Permafrost free systems – lower soil moisture than systems with permafrost

  8. ecologyecosystem water use evapotranspiration = evaporation + transpiration ET affects soil moisture E → surface moisture (0-15cm) T → surface & deep moisture (> 5cm) How are plants tied into soil moisture? Where in the soil do plants take water? transpiration (vascular plants) physiologically controlled evaporation (moss, soil) physically controlled

  9. water uptake profiles Sedge, blueberry shrub

  10. EcoHydrology Permafrost free area Surface and subsurface soil moisture are disconnected

  11. EcoHydrology “water limited”, less residual soil water Not “water limited”, more residual soil water for other processes How do vegetation water use and permafrost dynamics impact stream flow in the boreal forest discontinuous permafrost zone? Holistic approach by integrating ecological and hydrological processes, including storage, soil moisture, active layer dynamics, and transpiration

  12. EcoHydrology Coniferous CDE Deciduous DDE Likely varies over the growing season coniferous deciduous Soildrainage poor well Permafrost yes no Transpiration low high Changes in permafrost AND vegetation

  13. DDE- Plants leaf out, T increases CDE -Active layer deepens Spring snow melt period Growing season senesce,T decreases Autumn

  14. Integration Plant water use Hydrological variables Field work Data analysis Ti ~ N (mi,t) Bayesian Storage-based model Model integration Pathway and timing of water movement

  15. Acknowledgements Alaska EPSCoR NSF OPP International Arctic Research Center Larry Hinzman Kiona Ogle Bill Cable Miriam Jones Arctic Regions Supercomputing Center

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