2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2019 | 2:45 PM - 3:00 PM | USING HIGH-FREQUENCY SENSORS TO QUANTIFY RIVERINE CARBON AND NUTRIENT BUDGETS ACROSS ARCTIC LANDSCAPES | 250 AB
USING HIGH-FREQUENCY SENSORS TO QUANTIFY RIVERINE CARBON AND NUTRIENT BUDGETS ACROSS ARCTIC LANDSCAPES
The observed and projected hydrologic intensification across the Arctic region, coupled with pronounced degradation of permafrost, highlights the need to quantify changes in riverine carbon and nutrients budgets as material is increasingly released from the landscape. To this end, using sensors deployed from June-September 2017, we collected high-frequency discharge, nitrate (NO3-) and dissolved organic carbon (DOC) concentrations in three watersheds associated with the Long-Term Ecological Research (LTER) site at Toolik Field Station: the Kuparuk (low-gradient tundra), Oksrukuyik (lake-dominated tundra), and Trevor Creek (high-gradient alpine). We estimated daily and seasonal export as flux (mass/time) and yield (mass/area/time). Generally, DOC and NO3-exports were highest during an unseasonably wet late season (mid-July to August), a result counter to the current paradigm of early-season exports dominating Arctic riverine budgets. Our study revealed that high-frequency water chemistry data provides critical insights that challenge current conventions on the timing and magnitude of nutrient and carbon losses from permafrost-underlain Arctic landscapes. As hydrologic patterns intensify in the Arctic, riverine export of DOC and NO3- during wetter seasons could exacerbate nutrient imbalances in freshwater ecosystems, underscoring the need for continued high-frequency monitoring at high latitudes.
- Biogeochemistry
- Nutrients
- Disturbance
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Presenters/Authors
Arial Shogren
(), Department of Earth and Environmental Sciences, Michigan State University, shogrena@msu.edu;
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Jay Zarnetske
(), Department of Earth and Environmental Sciences, Michigan State University, jpz@msu.edu;
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Benjamin Abbott
(), Brigham Young University, Department of Plant and Wildlife Sciences, benabbott@byu.edu;
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Frances Iannucci
(), University of Alaska Fairbanks, fiannucci@alaska.edu;
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William Breck Bowden
(), University of Vermont, breck.bowden@uvm.edu;
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