The response of Arctic delta morphology and dynamics to permafrost loss and hydrological change ...
River deltas ringing the Arctic Ocean coastline are unique landforms shaped by both highly seasonal cold region hydrology and permafrost features such as thermokarst lakes. These lakes trap, store, and modulate the timing and magnitudes of riverine freshwater, sediment, and nutrients normally routed...
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| Format: | Article in Journal/Newspaper |
| Language: | unknown |
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University of California Office of the President
2024
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| Online Access: | https://dx.doi.org/10.17920/g9vz3r https://rgpogrants.ucop.edu/files/1614305/f480589/index.html |
| Summary: | River deltas ringing the Arctic Ocean coastline are unique landforms shaped by both highly seasonal cold region hydrology and permafrost features such as thermokarst lakes. These lakes trap, store, and modulate the timing and magnitudes of riverine freshwater, sediment, and nutrients normally routed directly to the ocean through a distributary delta channel network (DCN). Future climate warming is expected to thaw permafrost, modifying lake coverage and therefore riverine flux delivery to the Arctic Ocean, as well as release large quantities of previously frozen carbon into the atmosphere. How and where thermokarst lake coverage on deltas will change, and how these changes will impact sediment and nutrient transport to the coast, remains highly uncertain. We propose a two-pronged approach towards building an understanding of delta lake cover response to warming by: (1) performing a data-driven multiscale analysis of lake sizes and lake and channel network spatial patterns on arctic deltas using satellite ... |
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