@article{bdb61415cd574d9eb33246eb67cfb460,
title = "Modelling suspended sediment discharge in a glaciated Arctic catchment–Lake Peters, Northeast Brooks Range, Alaska",
abstract = "Seasonal suspended sediment transfer in glaciated catchments is responsive to meteorological, geomorphological, and glacio-fluvial conditions, and thus is a useful indicator of environmental system dynamics. Knowledge of multifaceted fluvial sediment-transfer processes is limited in the Alaskan Arctic – a region sensitive to contemporary environmental change. For two glaciated sub-catchments at Lake Peters, northeast Brooks Range, Alaska, we conducted a two-year endeavour to monitor the hydrology and meteorology, and used the data to derive multiple-regression models of suspended sediment load. Statistical selection of the best models shows that incorporating meteorological or temporal explanatory variables improves performances of turbidity- and discharge-based sediment models. The resulting modelled specific suspended sediment yields to Lake Peters are: 33 (20–60) t km−2 yr−1 in 2015, and 79 (50–140) t km−2 yr−1 in 2016 (95% confidence band estimates). In contrast to previous studies in Arctic Alaska, fluvial suspended sediment transfer to Lake Peters was primarily influenced by rainfall, and secondarily influenced by temperature-driven melt processes associated with clockwise diurnal hysteresis. Despite different sub-catchment glacier coverage, specific yields were the same order of magnitude from the two primary inflows to Lake Peters, which are Carnivore Creek (128 km2; 10% glacier coverage) and Chamberlin Creek (8 km2; 23% glacier coverage). Seasonal to longer-term sediment exhaustion and/or contrasting glacier dynamics may explain the lower than expected relative specific sediment yield from the more heavily glacierized Chamberlin Creek catchment. Absolute suspended sediment yield (t yr−1) from Carnivore Creek to Lake Peters was 27 times greater than from Chamberlin Creek, which we attribute to catchment size and sediment supply differences. Our results provide a foundational understanding of the current sediment transfer regime and are useful for predicting changes in fluvial sediment transport in glaciated Alaskan Arctic catchments.",
keywords = "Arctic, fluvial, glacier, sediment exhaustion, sediment model, sediment yield, suspended sediment, turbidity",
author = "Thurston, {Lorna Louise} and Erik Schiefer and McKay, {Nicholas P.} and Kaufman, {Darrell S.}",
note = "Funding Information: The authors are grateful for the support from the National Science Foundation, Arctic System Science Program, which provided collaborative grant funding (award # 1418000) for the umbrella project “.” The authors also acknowledge additional support from the Environmental Professionals of Arizona (EPAZ) Environmental Scholarship Program (2016–2017) and Stillwater Sciences. Permits to undertake this research in the Arctic National Wildlife Refuge were granted by the U.S. Department of the Interior − Fish and Wildlife Service, and we are thankful for the opportunity to access this remote part of Alaska. This research benefited from the efforts of many individuals who participated in field and laboratory work as part of the Arctic Glacial Lakes Project ( http://www2.nau.edu/arcss-p/ ) and we are thankful for their valuable input. CH2M HILL Polar Services and Coyote Air Service provided logistical support. Developing a system model of arctic glacial‐lacustrine sedimentation for investigating past and future climate change Funding Information: The authors are grateful for the support from the National Science Foundation, Arctic System Science Program, which provided collaborative grant funding (award # 1418000) for the umbrella project ?Developing a system model of arctic glacial-lacustrine sedimentation for investigating past and future climate change.? The authors also acknowledge additional support from the Environmental Professionals of Arizona (EPAZ) Environmental Scholarship Program (2016?2017) and Stillwater Sciences. Permits to undertake this research in the Arctic National Wildlife Refuge were granted by the U.S. Department of the Interior ? Fish and Wildlife Service, and we are thankful for the opportunity to access this remote part of Alaska. This research benefited from the efforts of many individuals who participated in field and laboratory work as part of the Arctic Glacial Lakes Project (http://www2.nau.edu/arcss-p/) and we are thankful for their valuable input. CH2M HILL Polar Services and Coyote Air Service provided logistical support. Funding Information: National Science Foundation, Grant/Award Number: 1418000 Funding information Publisher Copyright: {\textcopyright} 2020 John Wiley & Sons Ltd",
year = "2020",
month = sep,
day = "15",
doi = "10.1002/hyp.13846",
language = "English (US)",
volume = "34",
pages = "3910--3927",
journal = "Hydrological Processes",
issn = "0885-6087",
publisher = "John Wiley and Sons Ltd",
number = "19",
}