EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/22/2018 | 2:30 PM - 2:45 PM | ARCTIC RIVER ICINGS: SENSORS OF RAPIDLY CHANGING CLIMATE, HYDROLOGY, AND RIVER ECOSYSTEM CONDITIONS? | 410 A
ARCTIC RIVER ICINGS: SENSORS OF RAPIDLY CHANGING CLIMATE, HYDROLOGY, AND RIVER ECOSYSTEM CONDITIONS?
Recent climate change has profoundly impacted Arctic ecosystems, including notable declines in temporal and spatial extents of sea and lake ice. However, river icing has received little attention. These poorly-documented icings, sometimes also called aufeis or naled, are seasonal surficial ice accumulations that can be >10km2 in area and >10m thick. They form when water from a spring, river, or other source flows onto an already frozen surface, where it is exposed to subfreezing temperatures. Given their size and location, icings may have a large impact on the hydrology, geomorphology, and ecology of Arctic river environments. To begin revealing the dynamics and functions of these icings, we examine how icings are changing in response to a warming Arctic. We used daily satellite imagery of northern Alaska from 2000-2015 to evaluate if icings are becoming smaller or disappearing earlier in the summer. From 147 icing features examined, 84 are either becoming smaller or disappearing earlier; none are becoming larger or disappearing later. The declines are remarkably rapid and suggest that river ecosystems with icings are rapidly changing. Thus, river icings are promising sensors of broader changes to Arctic river environments.
- Climate Change
- Hydrology
- Habitat
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Presenters/Authors
Jay Zarnetske
(), Department of Earth and Environmental Sciences, Michigan State University, jpz@msu.edu;
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Tamlin Pavelsky
(), Department of Geological Sciences, University of North Carolina, Chapel Hill, USA, pavelsky@unc.edu;
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