Product: 8e2d4afc-2d9b-432f-97e5-2d8fb2b602d3

Metadata Format
Product Title
A synthesis of thermokarst lake water balance in high-latitude regions of North America from isotope tracers
Description
A synthesis of hydrological conditions for 376 lakes of mainly thermokarst origin across high-latitude North America.
Project ID
2ce83999-df5e-4f43-83ba-531250f1db10
Project Title
FishCAFE: Response of an Arctic Freshwater Ecosystem to Climate and Land-use Change
Point of Contact(s)
LCC Network Data Steward
LCC Network Data Manager
lccdatasteward@fws.gov
Arctic Landscape Conservation Cooperative
U.S. Fish & Wildlife Service
1011 E. Tudor Rd
Anchorage, Alaska 99503
V: +1 907 7863532
staff@arcticlcc.org
http://arcticlcc.org
Arctic Landscape Conservation Cooperative
U.S. Fish & Wildlife Service
1011 E. Tudor Rd
Anchorage, Alaska 99503
V: +1 907 7863532
staff@arcticlcc.org
http://arcticlcc.org

Product Abstract

Numerous studies utilizing remote sensing imagery and other methods have documented that thermokarst lakes are undergoing varied hydrological transitions in response to recent climate changes, from surface area expansion to drainage and evaporative desiccation. Here, we provide a synthesis of hydrological conditions for 376 lakes of mainly thermokarst origin across high-latitude North America. We assemble surface water isotope compositions measured during the past decade at five lake-rich landscapes including Arctic Coastal Plain (Alaska), Yukon Flats (Alaska), Old Crow Flats (Yukon), northwestern Hudson Bay Lowlands (Manitoba), and Nunavik (Quebec). These landscapes represent the broad range of thermokarst environments by spanning gradients in meteorological, permafrost, and vegetation conditions. An isotope framework was established based on flux-weighted long-term averages of meteorological conditions for each lake to quantify water balance metrics. The isotope composition of source water and evaporation-to-inflow ratio for each lake were determined, and the results demonstrated a substantial array of regional and subregional diversity of lake hydrological conditions. Controls on lake water balance and how these vary among the five landscapes and with differing environmental drivers are assessed. Findings reveal that lakes in the Hudson Bay Lowlands are most vulnerable to evaporative desiccation, whereas those in Nunavik are most resilient. However, we also identify the complexity in predicting hydrological responses of these thermokarst landscapes to future climate change.

Purpose:

Product Links

Product Keywords

  • ISO 19115 Topic Category (isoTopicCategory):
    • environment,
    • inlandWaters
  • Global Change Master Directory (GCMD) Science Keywords (project):
    • PERMAFROST,
    • LAKES,
    • WETLANDS,
    • RIVER ICE,
    • ECOSYSTEM FUNCTIONS,
    • LAKE ICE
  • End User Types - Landscape Conservation Cooperatives (LCC End User Type):
    • Federal resource managers,
    • Academics & scientific researchers

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