Isotopic constraints on water balance of tundra lakes and watersheds affected by permafrost degradation, Mackenzie Delta region, Northwest Territories, Canada

Wan, Chengwei; Gibson, J. J.; Peters, Daniel L.

doi:10.1016/j.scitotenv.2020.139176

Cited by 21 publications

(9 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… This dataset enables identification of water sources and distributions in streamflow and can help to resolve spatial and/or temporal variations in potential water sources including precipitaiton (snow, rain, mixed), groundwater, lakes and wetlands [2] , [3] , [4] , [5] . This dataset facilitates the estimation of water balance of catchment areas [6] , [7] , [8] using the spatiotemporal distributions in precipitation [9 , 10] as well as evaporation-transpiration partitioning [11] , [12] , [13] , catchment residence times [14] , and assessment of water-carbon cycle linkages [11 , 15] , and nutrients [16] . Isotope data provide process evaluation targets and diagnostic tools for refining water-cycle modeling capabilities at the local, regional and continental scales [17] , [18] , [19] , [20] .…”

Section: Value Of the Datamentioning

confidence: 99%

“…This dataset facilitates the estimation of water balance of catchment areas [6] , [7] , [8] using the spatiotemporal distributions in precipitation [9 , 10] as well as evaporation-transpiration partitioning [11] , [12] , [13] , catchment residence times [14] , and assessment of water-carbon cycle linkages [11 , 15] , and nutrients [16] .…”

Section: Value Of the Datamentioning

confidence: 99%

See 1 more Smart Citation

Dataset of 18O and 2H in streamflow across Canada: A national resource for tracing water sources, water balance and predictive modelling

Gibson

Eby²,

Stadnyk

et al. 2021

Data in Brief

View full text Add to dashboard Cite

Section: Value Of the Datamentioning

confidence: 99%

Section: Value Of the Datamentioning

confidence: 99%

Dataset of 18O and 2H in streamflow across Canada: A national resource for tracing water sources, water balance and predictive modelling

Gibson

Eby²,

Stadnyk

et al. 2021

Data in Brief

View full text Add to dashboard Cite

“…For some lakes in Alaska and northern Canada, oxygen isotopic compositions are strongly controlled by evaporation 25–27 . For modern lakes on the Yamal Peninsula there is negligible evaporation, and this water fully corresponds to the GMWL 28 .…”

Section: Resultsmentioning

confidence: 99%

Stable oxygen and hydrogen isotope compositions of the Messoyakha and Pestsovoe pingos in northwest Siberia as markers of ice core formation

Vasil'chuk

Chizhova

Budantseva

et al. 2021

Permafrost & Periglacial

View full text Add to dashboard Cite

Pingos are indicators of modern and past conditions of permafrost. In total, 1,620 pingos have been identified on the Yamal and Gydan peninsulas in western Siberia. The main purpose of this study is to consider the distribution of stable isotopes in pingo ice cores formed under conditions of open and closed systems. Two pingos from ice cores of different origin in the continuous permafrost zone of northwest Siberia have been considered: the Messoyaha‐1 pingo (10.5 m in height) and the Pestsovoe pingo (17 m in height). Drilling of the ice core was performed with continuous sampling of an undisturbed frozen core. Ice formation was estimated according to the Rayleigh fractionation in a closed‐system versus an open‐system framework. For the Pestsovoe pingo, a pronounced decrease in δ18O values with corresponding increase in dexc with depth indicates a closed system upon freezing of the lake talik from the top down. For the Messoyakha‐1 pingo, the values of δ18O and δ2Н showed a weak tendency to decrease with depth, with values of dexc varying randomly. Ice that was segregated in the overlying and underlying sediments had similar values of δ18O and δ2Н and a low slope. Isotopically nonequilibrium ice formation was established for ice which had been segregated in a closed system and for ice cores formed in an open to semiclosed system. The vacuum mechanism of water suction from the surrounding lake or lake talik may have played a significant role during the formation of the upper ice core of the Messoyakha‐1 pingo and its additional growth.

show abstract

“…Lakes 4A, 4B, 5A, and 5B are a subset of the 11 paired lake systems, and are among the most intensively studied lakes in the region. 11,26,27,30,[33][34][35][36][37] One of the gaps in the hydrological and ecological knowledge is the need for a better process-based understanding, characterization, and quantification of the sediment dynamics (erosion, transport, deposition) involved within the continuum from the RTSS to receiving lake depositional zones, for which this study aims to address.…”

Section: Study Area and Sampling Sitesmentioning

confidence: 99%

Assessment of the sediment and associated nutrient/contaminant continuum, from permafrost thaw slump scars to tundra lakes in the western Canadian Arctic

Droppo

Cenzo

McFadyen

et al. 2021

Permafrost & Periglacial

View full text Add to dashboard Cite

Within the Canadian Arctic, vast areas of previously frozen sediments and carbon are being released into aquatic ecosystems via the occurrence of permafrost thaw and retrogressive thaw slumps (RTSs). While knowledge of mass wasting RTS processes are more advanced, the significance of exposed retrogressive thaw slump scars (RTSSs) at various phases of stabilization to yield additional large quantities of ecologically relevant sediment to lakes and rivers is not well constrained. Using laboratory simulation (linked rainfall and lake flow dynamics), RTS sediments were investigated to assess the sediment continuum from the terrestrial RTSSs to depositional zones within two Arctic tundra lakes. Using an estimate of 30% of the RTSS areas contributing sediment under hypothetical 20-and 100-year rainfall events, up to 598 and 997 kg hr À1 of RTSS sediment washoff was projected respectively. Eroded particle size, regardless of lake or initial bulk RTSS size distribution, was dominated by individual clay particles (<5 μm) that were winnowed from the RTSS surface sediment. Given this is the most biogeochemical relevant fraction, it has the potential for significant ecological impact on the lakes. This deposited fine sediment was found to be very unstable with a critical shear stress for erosion close to that of the critical shear for deposition (0.05 Pa). As such, wave energy is expected to have an impact on remobilization of fine sediments and associated compounds with concomitant implications for lake-ecosystem health.

show abstract

Isotopic constraints on water balance of tundra lakes and watersheds affected by permafrost degradation, Mackenzie Delta region, Northwest Territories, Canada

Cited by 21 publications

References 64 publications

Dataset of 18O and 2H in streamflow across Canada: A national resource for tracing water sources, water balance and predictive modelling

Dataset of 18O and 2H in streamflow across Canada: A national resource for tracing water sources, water balance and predictive modelling

Stable oxygen and hydrogen isotope compositions of the Messoyakha and Pestsovoe pingos in northwest Siberia as markers of ice core formation

Assessment of the sediment and associated nutrient/contaminant continuum, from permafrost thaw slump scars to tundra lakes in the western Canadian Arctic

Contact Info

Product

Resources

About