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| Type: | Resource | |
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| Created: | May 30, 2025 at 4:32 p.m. (UTC) | |
| Last updated: | Jun 18, 2025 at 3:47 p.m. (UTC) | |
| Citation: | See how to cite this resource | |
| Content types: | CSV Content |
| Sharing Status: | Public |
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Abstract
The Arctic is rapidly becoming warmer and wetter due to climate change. In response to these changes, hydrologic features such as water tracks – ubiquitous, unchannelized Arctic flow features – are potentially shifting towards a more channelized drainage network due to permafrost thaw and degradation. However, the impact that channelization has on hillslope hydrology in the upland Arctic is poorly understood. In this study, we aim to better constrain how channelization impacts runoff and hillslope-based storm responses in variably channelized hillslope hydrologic features (hereafter called TGCs). To do this, we instrumented three TGCs in northern Alaska, USA, with 15 hillslope wells and measured discharge at two of the three sites during the 2023 and 2024 thaw season. We used this field data to delineate storm events, calculated standardized storm response parameters, and compared responses with those at four nearby water tracks and one valley bottom stream. Results suggest that TGCs behave similarly to valley bottom streams with more rapid runoff responses than nearby water tracks. Furthermore, we found that gully presence steepens hydraulic gradients, lowering the water table in the adjacent hillslopes, leading to delayed initial storm responses on those hillslopes. Together, these patterns suggest that there is a spatiotemporally variable zone of saturation surrounding these TGCs that contributes to their rapid initial storm responses. These results suggest that increasingly channelized Arctic hillslope flow networks may be both more likely to cause landscape drying and delayed initial runoff responses, but changes in summer rainfall and connectivity across scales may moderate those impacts.
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Credits
Funding Agencies
This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
|---|---|---|
| National Science Foundation | None | EAR-2102338 |
| National Science Foundation | None | EAR-2235308 |
| National Science Foundation | None | EAR-2102342 |
| National Science Foundation | None | EAR-1653998 |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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