BER launches Environmental System Science Program. Visit our new website under construction!

U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights


Changes in Northern Alaska’s Land-to-Ocean River Flows
Published: December 18, 2019
Posted: July 08, 2020

Warming and permafrost thaw is impacting the region’s terrestrial hydrological flows.

The Science
Through a synthesis of available measurements and state-of-the-art hydrological modeling, the research points to significant increases in the proportion of subsurface runoff and cold season discharge across the North Slope of Alaska, changes that are consistent with warming and thawing permafrost.

The Impact
The Alaskan North Slope rivers carry carbon and other nutrients to the lagoon environments that are prominent components of the Beaufort Sea coast. The changing terrestrial inflows and other alterations connected with permafrost thaw may be influencing food web structure within the lagoons.

Summary
Scientists from the University of Massachusetts-Amherst investigated the changing character of runoff, river discharge, and other hydrological elements across the watershed draining the North Slope of Alaska over the period 1981–2010. Field measurements of discharge and other hydrological cycle elements in this region are sparse, requiring a modeling approach to quantify the land-ocean flows and their changing character. This synthesis of observations and modeling reveals significant increases in the proportion of subsurface runoff. Cold season discharge increases are 134% of the long-term average for the North Slope and 215% for the Colville River basin. The simulations point to a significant decline in terrestrial water storage, as losses in soil ice outweigh gains in soil liquid water storage. The timing of peak spring discharge shifted earlier by 4.5 days, consistent with earlier snowmelt thaw. These changes are consistent with warming and thawing permafrost and have implications for water, carbon, and nutrient cycling in coastal environments. The changing terrestrial inflows may be impacting biological productivity within the lagoons, upon which local native communities rely for their subsistence lifestyle.

Contacts
BER Program Manager
Daniel Stover
U.S. Department of Energy Office of Science, Office of Biological and Environmental Research
Earth and Environmental Systems Sciences Division (SC-33.1)
Environmental System Science
daniel.stover@science.doe.gov

Principal Investigator
Michael Rawlins
Associate Director, Climate System Research Center
University of Massachusetts-Amherst
Amherst, MA
rawlins@geo.umass.edu

Funding
This research has been supported by the Office of Biological and Environment Research (BER, grant no. DE-SC0019462 to M. Rawlins), within the U.S. Department of Energy (DOE) Office of Science, and the DOE Next-Generation Ecosystem Experiments (NGEE)–Arctic project of BER’s Terrestrial Ecosystem Science program (D. Nicolsky). Support was also provided by the Beaufort Lagoon Ecosystems Long Term Ecological Research program (BLE LTER), under the National Science Foundation (NSF) Division of Polar Programs (grant no. NSF-OPP-1656026) and the National Aeronautics and Space Administration (NASA, grant no. 80NSSC19K0649). The study involved use of the Permafrost Water Balance Model v3.

Publication
Rawlins, M. A., L. Cai, S. L. Stuefer, and D. Nicolsky. “Changing characteristics of runoff and freshwater export from watersheds draining northern Alaska.” The Cryosphere 13(12), 3337–52 (2019). [DOI:10.5194/tc-13-3337-2019].

Related Links

Topic Areas:

  • Research Area: Terrestrial Ecosystem Science
  • Research Area: Next-Generation Ecosystem Experiments (NGEE)

Division: SC-33.1 Earth and Environmental Sciences Division, BER

 

BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER

Recent Highlights

Jan 11, 2022
No Honor Among Copper Thieves
Findings provide a novel means to manipulate methanotrophs for a variety of environmental and in [more...]

Dec 06, 2021
New Genome Editing Tools Can Edit Within Microbial Communities
Two new technologies allow scientists to edit specific species and genes within complex laborato [more...]

Oct 27, 2021
Fungal Recyclers: Fungi Reuse Fire-Altered Organic Matter
Degrading pyrogenic (fire-affected) organic matter is an important ecosystem function of fungi i [more...]

Oct 19, 2021
Microbes Offer a Glimpse into the Future of Climate Change
Scientists identify key features in microbes that predict how warming affects carbon dioxide emi [more...]

Aug 25, 2021
Assessing the Production Cost and Carbon Footprint of a Promising Aviation Biofuel
Biomass-derived DMCO has the potential to serve as a low-carbon, high-performance jet fuel blend [more...]

List all highlights (possible long download time)