Initial Quantification of Suspended Sediment Loads for Three Alaska North Slope Rivers

Lamb, E.; Toniolo, Horacio

doi:10.3390/w8100419

Cited by 10 publications

(9 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As well as snowfall, streams could see increased disturbance due to increased summer rain events. In summer, rain events in the Arctic are known to have large influences on streams by increasing sediment load, inundating floodplains and causing rapid mass movements (Cogley & McCann, 1976;Lamb & Toniolo, 2016;Lewis, Braun, Hardy, Francus, & Bradley, 2005).…”

Section: Variation In Environmental Habitat Conditionsmentioning

confidence: 99%

Spatio‐temporal dynamics of macroinvertebrate communities in northeast Greenlandic snowmelt streams

et al. 2018

View full text Add to dashboard Cite

Future climate change throughout the Arctic is expected to increase channel stability in glacially influenced streams through reduced contributions from glacial meltwater and increases in groundwater. In contrast, predictions for northeast Greenland of increased precipitation for the next 100 years-including winter snowfall-which with warmer air temperature, is expected to increase the size of spring floods in snowmelt streams. Coupled with increased disturbance through frequent summer rainfall events, nivation processes and permafrost degradation will reduce resistance of channel sediments to erosion and thereby decrease channel stability. Decreased channel stability will impact macroinvertebrate abundance and diversity. Five streams sourced by snowpacks of varying extent were studied over 3 summer seasons (2013)(2014)(2015) to investigate the potential effect of shift in snowmelt regime on macroinvertebrate communities.Total abundance and taxa richness were significantly higher in streams with small snowpacks, where the chironomid genus Hydrobaenus was the most abundant taxon.Streams with large snowpacks were dominated by the chironomid genus Diamesa.Multivariate ordination models and correlation indicated that macroinvertebrate communities were significantly influenced by channel stability and bed sediment size.Macroinvertebrate abundance was significantly higher in 2013, following low winter snowfall and associated low meltwater inputs to streams, highlighting interannual variability in macroinvertebrate communities.A shift towards less stable habitats in snowmelt streams will potentially lead to reduced macroinvertebrate abundance and taxa richness, and local extinction of specialized taxa. Thus, snowmelt-fed streams in northeast Greenland may respond very differently to changing climate compared with streams in parts of the Arctic dominated by glacial meltwater. KEYWORDSArctic, channel stability, Chironomidae, climate change, freshwater, hydroecology, meltwater, snowThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Section: Variation In Environmental Habitat Conditionsmentioning

confidence: 99%

Spatio‐temporal dynamics of macroinvertebrate communities in northeast Greenlandic snowmelt streams

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In Arctic Canada, automated sampling has enabled continuous measurement of SSC fluctuations and estimation of sediment yields using spline curves (Cockburn & Lamoureux, 2008;Favaro & Lamoureux, 2014;Lewis et al, 2012); however, such intensive sampling throughout the full length of the open-channel season is not always feasible. More typically in the Arctic, statistical models comprise simple sediment rating curves using discharge as the single predictor of SSC (Bogen & Bonses, 2003;Fenn et al, 1985;Hodson et al, 1998;Horowitz, 2003;Lamb & Toniolo, 2016;Lewkowicz & Wolfe, 1994;McLaren, 1981;Rasch, Elberling, Jakobsen, & Hasholt 2000). In glaciated non-Arctic catchments, turbidity has also been used to predict SSC (e.g.…”

Section: Introductionmentioning

confidence: 99%

Modelling suspended sediment discharge in a glaciated Arctic catchment–Lake Peters, Northeast Brooks Range, Alaska

Thurston

Schiefer

McKay

et al. 2020

Hydrological Processes

View full text Add to dashboard Cite

show abstract

“…Hysteresis patterns for calcium and potassium are clockwise across catchments with varying permafrost coverage (Petrone et al 2007). The majority of SS is transported during the snowmelt season (Braun et al 2000;Forbes and Lamoureux 2005;Cockburn and Lamoureux 2008;Lamb and Toniolo 2016;Lamoureux and Lafrenière 2017), although high amounts of sediment may also be mobilized during summer rainfall events (Lewis et al 2005;Dugan et al 2012;Lamb and Toniolo 2016). Clockwise suspended sediment discharge hysteresis behaviour suggests a limitation and therefore rapid exhaustion of sediment that can be mobilized during rainfall (Dugan et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Summer rainfall dissolved organic carbon, solute, and sediment fluxes in a small Arctic coastal catchment on Herschel Island (Yukon Territory, Canada)

et al. 2018

View full text Add to dashboard Cite

Coastal ecosystems in the Arctic are affected by climate change. As summer rainfall frequency and intensity are projected to increase in the future, more organic matter, nutrients and sediment could be mobilized and transported into the coastal nearshore zones. However, knowledge of current processes and future changes is limited. We investigated streamflow dynamics and the impacts of summer rainfall on lateral fluxes in a small coastal catchment on Herschel Island in the western Canadian Arctic. For the summer monitoring periods of 2014-2016, mean dissolved organic matter flux over 17 days amounted to 82.7 ± 30.7 kg km −2 and mean total dissolved solids flux to 5252 ± 1224 kg km −2 . Flux of suspended sediment was 7245 kg km −2 in 2015, and 369 kg km −2 in 2016. We found that 2.0% of suspended sediment was composed of particulate organic carbon. Data and hysteresis analysis suggest a limited supply of sediments; their interannual variability is most likely caused by short-lived localized disturbances. In contrast, our results imply that dissolved organic carbon is widely available throughout the catchment and exhibits positive linear relationship with runoff. We hypothesize that increased projected rainfall in the future will result in a similar increase of dissolved organic carbon fluxes.Key words: permafrost, hydrology, lateral fluxes, hysteresis, climate change.Résumé : Les écosystèmes côtiers dans l'Arctique sont touchés par le changement climatique. Comme la fréquence et l'intensité des pluies d'été sont censées augmenter à l'avenir, plus de matière organique, de substances nutritives et de sédiments pourraient être mobilisés et transportés dans les zones proches des côtes. Par contre, la connaissance quant aux processus actuels et quant aux changements futurs est limitée. Nous avons examiné la dynamique de débit d'eau et les impacts des pluies d'été sur les flux latéraux dans un petit

show abstract

Initial Quantification of Suspended Sediment Loads for Three Alaska North Slope Rivers

Cited by 10 publications

References 27 publications

Spatio‐temporal dynamics of macroinvertebrate communities in northeast Greenlandic snowmelt streams

Spatio‐temporal dynamics of macroinvertebrate communities in northeast Greenlandic snowmelt streams

Modelling suspended sediment discharge in a glaciated Arctic catchment–Lake Peters, Northeast Brooks Range, Alaska

Summer rainfall dissolved organic carbon, solute, and sediment fluxes in a small Arctic coastal catchment on Herschel Island (Yukon Territory, Canada)

Contact Info

Product

Resources

About