Articles | Volume 23, issue 9
https://doi.org/10.5194/hess-23-3571-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-23-3571-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Assessing inter-annual and seasonal patterns of DOC and DOM quality across a complex alpine watershed underlain by discontinuous permafrost in Yukon, Canada
Nadine J. Shatilla
CORRESPONDING AUTHOR
Watershed Hydrology Group, School of Geography and Earth Sciences,
McMaster University, Hamilton, L8S 4L8, Canada
Sean K. Carey
Watershed Hydrology Group, School of Geography and Earth Sciences,
McMaster University, Hamilton, L8S 4L8, Canada
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Arsh Grewal, Erin M. Nicholls, and Sean K. Carey
EGUsphere, https://doi.org/10.5194/egusphere-2024-2645, https://doi.org/10.5194/egusphere-2024-2645, 2024
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Stream chemistry in permafrost watersheds is highly seasonal. This variability can be driven by the seasonal thawing of the active layer (the layer of soil above the permafrost that thaws each year) or by streamflow (streamflow is typically highest during snowmelt). In this paper, we disentangle the influence of active layer thaw and streamflow on the seasonality of stream chemistry. We found that topography and the extent of permafrost are key factors controlling the degree of this seasonality.
Andras Janos Szeitz and Sean K. Carey
EGUsphere, https://doi.org/10.5194/egusphere-2024-1741, https://doi.org/10.5194/egusphere-2024-1741, 2024
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Stream temperature sensitivity in northern regions responds to many of the same environmental controls as in temperate regions, but the presence of annually frozen ground (permafrost) influences catchment hydrology and stream temperature regimes. Permafrost can have positive and negative influences on thermal regimes. The net effect of northern environmental change on stream temperature is complex and uncertain, but permafrost will likely play a role through its control on cold region hydrology.
M. Graham Clark and Sean K. Carey
Geosci. Model Dev., 17, 4911–4922, https://doi.org/10.5194/gmd-17-4911-2024, https://doi.org/10.5194/gmd-17-4911-2024, 2024
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This paper provides validation of the Canadian Small Lakes Model (CSLM) for estimating evaporation rates from reservoirs and a refactoring of the original FORTRAN code into MATLAB and Python, which are now stored in GitHub repositories. Here we provide direct observations of the surface energy exchange obtained with an eddy covariance system to validate the CSLM. There was good agreement between observations and estimations except under specific atmospheric conditions when evaporation is low.
Chris M. DeBeer, Howard S. Wheater, John W. Pomeroy, Alan G. Barr, Jennifer L. Baltzer, Jill F. Johnstone, Merritt R. Turetsky, Ronald E. Stewart, Masaki Hayashi, Garth van der Kamp, Shawn Marshall, Elizabeth Campbell, Philip Marsh, Sean K. Carey, William L. Quinton, Yanping Li, Saman Razavi, Aaron Berg, Jeffrey J. McDonnell, Christopher Spence, Warren D. Helgason, Andrew M. Ireson, T. Andrew Black, Mohamed Elshamy, Fuad Yassin, Bruce Davison, Allan Howard, Julie M. Thériault, Kevin Shook, Michael N. Demuth, and Alain Pietroniro
Hydrol. Earth Syst. Sci., 25, 1849–1882, https://doi.org/10.5194/hess-25-1849-2021, https://doi.org/10.5194/hess-25-1849-2021, 2021
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This article examines future changes in land cover and hydrological cycling across the interior of western Canada under climate conditions projected for the 21st century. Key insights into the mechanisms and interactions of Earth system and hydrological process responses are presented, and this understanding is used together with model application to provide a synthesis of future change. This has allowed more scientifically informed projections than have hitherto been available.
M. Graham Clark, Elyn R. Humphreys, and Sean K. Carey
Biogeosciences, 17, 667–682, https://doi.org/10.5194/bg-17-667-2020, https://doi.org/10.5194/bg-17-667-2020, 2020
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Natural and restored wetlands typically emit methane to the atmosphere. However, we found that a wetland constructed after oil sand mining in boreal Canada using organic soils from local peatlands had negligible emissions of methane in its first 3 years. Methane production was likely suppressed due to an abundance of alternate inorganic electron acceptors. Methane emissions may increase in the future if the alternate electron acceptors continue to decrease.
Thea I. Piovano, Doerthe Tetzlaff, Sean K. Carey, Nadine J. Shatilla, Aaron Smith, and Chris Soulsby
Hydrol. Earth Syst. Sci., 23, 2507–2523, https://doi.org/10.5194/hess-23-2507-2019, https://doi.org/10.5194/hess-23-2507-2019, 2019
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We adapted the spatially distributed, tracer-aided model, STARR, to a permafrost-influenced catchment in the Yukon Territory, Canada, with a time-variable implementation of field capacity to capture thaw layer spatio-temporal dynamics. We applied a multi-criteria calibration with multi-year field data. This study demonstrates the value of the integration of isotope data in a spatially distributed model to quantify catchment water storage and age dynamics in a permafrost-influenced environment.
Kabir Rasouli, John W. Pomeroy, J. Richard Janowicz, Tyler J. Williams, and Sean K. Carey
Earth Syst. Sci. Data, 11, 89–100, https://doi.org/10.5194/essd-11-89-2019, https://doi.org/10.5194/essd-11-89-2019, 2019
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A set of hydrometeorological data including daily precipitation, hourly air temperature, humidity, wind, solar and net radiation, soil temperature, soil moisture, snow depth and snow water equivalent, streamflow and water level in a groundwater well, and geographical information system data are presented in this paper. This dataset was recorded at different elevation bands in Wolf Creek Research Basin, near Whitehorse, Yukon Territory, Canada.
Related subject area
Subject: Biogeochemical processes | Techniques and Approaches: Instruments and observation techniques
CAMELS-Chem: augmenting CAMELS (Catchment Attributes and Meteorology for Large-sample Studies) with atmospheric and stream water chemistry data
Hydrological connectivity controls dissolved organic carbon exports in a peatland-dominated boreal catchment stream
Technical note: Testing the effect of different pumping rates on pore-water sampling for ions, stable isotopes, and gas concentrations in the hyporheic zone
Geophysically based analysis of breakthrough curves and ion exchange processes in soil
Spatio-temporal controls of C–N–P dynamics across headwater catchments of a temperate agricultural region from public data analysis
Pesticide peak concentration reduction in a small vegetated treatment system controlled by chemograph shape
On the role of operational dynamics in biogeochemical efficiency of a soil aquifer treatment system
Hydrological tracers for assessing transport and dissipation processes of pesticides in a model constructed wetland system
A small-volume multiplexed pumping system for automated, high-frequency water chemistry measurements in volume-limited applications
The importance of small artificial water bodies as sources of methane emissions in Queensland, Australia
Nitrogen attenuation, dilution and recycling in the intertidal hyporheic zone of a subtropical estuary
Decoupling of dissolved organic matter patterns between stream and riparian groundwater in a headwater forested catchment
Non-destructive estimates of soil carbonic anhydrase activity and associated soil water oxygen isotope composition
Carbon isotopes of dissolved inorganic carbon reflect utilization of different carbon sources by microbial communities in two limestone aquifer assemblages
The influence of riparian evapotranspiration on stream hydrology and nitrogen retention in a subhumid Mediterranean catchment
Stream restoration and sewers impact sources and fluxes of water, carbon, and nutrients in urban watersheds
Redox controls on methane formation, migration and fate in shallow aquifers
Interacting effects of climate and agriculture on fluvial DOM in temperate and subtropical catchments
Chemical and U–Sr isotopic variations in stream and source waters of the Strengbach watershed (Vosges mountains, France)
Spatiotemporal characterization of dissolved carbon for inland waters in semi-humid/semi-arid region, China
Impacts of tropical cyclones on hydrochemistry of a subtropical forest
Acid-base characteristics of the Grass Pond watershed in the Adirondack Mountains of New York State, USA: interactions among soil, vegetation and surface waters
Catchment features controlling nitrogen dynamics in running waters above the tree line (central Italian Alps)
Dissolved organic carbon characteristics in surface ponds from contrasting wetland ecosystems: a case study in the Sanjiang Plain, Northeast China
Hydrochemical processes in lowland rivers: insights from in situ, high-resolution monitoring
Heterogeneity of soil carbon pools and fluxes in a channelized and a restored floodplain section (Thur River, Switzerland)
Gary Sterle, Julia Perdrial, Dustin W. Kincaid, Kristen L. Underwood, Donna M. Rizzo, Ijaz Ul Haq, Li Li, Byung Suk Lee, Thomas Adler, Hang Wen, Helena Middleton, and Adrian A. Harpold
Hydrol. Earth Syst. Sci., 28, 611–630, https://doi.org/10.5194/hess-28-611-2024, https://doi.org/10.5194/hess-28-611-2024, 2024
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We develop stream water chemistry to pair with the existing CAMELS (Catchment Attributes and Meteorology for Large-sample Studies) dataset. The newly developed dataset, termed CAMELS-Chem, includes common stream water chemistry constituents and wet deposition chemistry in 516 catchments. Examples show the value of CAMELS-Chem to trend and spatial analyses, as well as its limitations in sampling length and consistency.
Antonin Prijac, Laure Gandois, Pierre Taillardat, Marc-André Bourgault, Khawla Riahi, Alex Ponçot, Alain Tremblay, and Michelle Garneau
Hydrol. Earth Syst. Sci., 27, 3935–3955, https://doi.org/10.5194/hess-27-3935-2023, https://doi.org/10.5194/hess-27-3935-2023, 2023
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The peatland dissolved organic carbon (DOC) lost through aquatic exports can offset a significant proportion of the ecosystem carbon balance. Hence, we propose a new approach to better estimate the DOC exports based on the specific contribution of a boreal peatland (Canada) during periods of high flow. In addition, we studied the relations between DOC concentrations and stream discharge in order to better understand the DOC export mechanisms under contrasted hydrometeorological conditions.
Tamara Michaelis, Anja Wunderlich, Thomas Baumann, Juergen Geist, and Florian Einsiedl
Hydrol. Earth Syst. Sci., 27, 3769–3782, https://doi.org/10.5194/hess-27-3769-2023, https://doi.org/10.5194/hess-27-3769-2023, 2023
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Riverbeds are densely populated with microorganisms which catalyze ecologically relevant processes. To study this complex zone, we tested pore-water extraction with microfilter tubes. The method was found to be suitable for the measurement of dissolved solutes but less so for gases. The pumping rate during sample extraction strongly influenced gas analyses in the samples. The combination with an optical oxygen sensor and a temperature monitoring system was found to be highly valuable.
Shany Ben Moshe, Pauline Kessouri, Dana Erlich, and Alex Furman
Hydrol. Earth Syst. Sci., 25, 3041–3052, https://doi.org/10.5194/hess-25-3041-2021, https://doi.org/10.5194/hess-25-3041-2021, 2021
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A non-invasive geophysical method (spectral induced polarization, SIP) was used to characterize and predict solute transport patterns in soil columns. Our results show that SIP-based breakthrough curve (BTC) analysis is superior over conventional outflow-based analysis as it can characterize system heterogeneity and is superior over electrical-conductivity-based analysis as it is capable of distinguishing between the adsorption end-members without the need for sampling.
Stella Guillemot, Ophelie Fovet, Chantal Gascuel-Odoux, Gérard Gruau, Antoine Casquin, Florence Curie, Camille Minaudo, Laurent Strohmenger, and Florentina Moatar
Hydrol. Earth Syst. Sci., 25, 2491–2511, https://doi.org/10.5194/hess-25-2491-2021, https://doi.org/10.5194/hess-25-2491-2021, 2021
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This study investigates the drivers of spatial variations in stream water quality in poorly studied headwater catchments and includes multiple elements involved in major water quality issues, such as eutrophication. We used a regional public dataset of monthly stream water concentrations monitored for 10 years over 185 agricultural catchments. We found a spatial and seasonal opposition between carbon and nitrogen concentrations, while phosphorus concentrations showed another spatial pattern.
Jan Greiwe, Oliver Olsson, Klaus Kümmerer, and Jens Lange
Hydrol. Earth Syst. Sci., 25, 497–509, https://doi.org/10.5194/hess-25-497-2021, https://doi.org/10.5194/hess-25-497-2021, 2021
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We investigated the linkage between contaminant mobilization in catchments and their mitigation in vegetated treatment systems (VTSs). We identified different patterns in chemographs recorded at the inlet of a VTS, indicating distinct mobilization patterns that were associated with similar source areas, transport pathways, and discharge dynamics. Peak concentration reduction in the VTS was strongest for sharp-peaked chemographs, suggesting that dispersion was the principle mitigation process.
Shany Ben Moshe, Noam Weisbrod, Felix Barquero, Jana Sallwey, Ofri Orgad, and Alex Furman
Hydrol. Earth Syst. Sci., 24, 417–426, https://doi.org/10.5194/hess-24-417-2020, https://doi.org/10.5194/hess-24-417-2020, 2020
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In soil aquifer treatment (a soil-based treatment for wastewater), infiltration ponds are operated in flooding and drying cycles, and the reclaimed water may be used for irrigation. We tested the effect of hydraulic operation on the biogeochemical system via long-column experiments. We found that longer drying periods not only were beneficial for the upper area of the profile but also increased the volume of the system that maintained oxidizing conditions.
Elena Fernández-Pascual, Marcus Bork, Birte Hensen, and Jens Lange
Hydrol. Earth Syst. Sci., 24, 41–60, https://doi.org/10.5194/hess-24-41-2020, https://doi.org/10.5194/hess-24-41-2020, 2020
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In this study we explore the use of hydrological tracers coupled with high vertical resolution sampling and monitoring to evaluate temporal and spatial mechanisms that dominate transport and dissipation of pesticides in a laboratory-scale constructed wetland. Our results reveal different transport vectors and dissipation pathways of solutes over time and space that are influenced by the constructional design, the presence of plants and the alternation of different hydrological conditions.
Bryan M. Maxwell, François Birgand, Brad Smith, and Kyle Aveni-Deforge
Hydrol. Earth Syst. Sci., 22, 5615–5628, https://doi.org/10.5194/hess-22-5615-2018, https://doi.org/10.5194/hess-22-5615-2018, 2018
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A multiplexed pumping system (MPS) for obtaining continuous water quality data at multiple locations was previously reported. The existing design was not practical for sampling water in volume-limited applications such as small mesocosms or porewater sampling. This paper discusses the design and performance of a small-volume MPS and illustrates two applications, showing spatial variability in replicate in situ mesocosms and short-circuiting in a woodchip bioreactor using porewater sampling.
Alistair Grinham, Simon Albert, Nathaniel Deering, Matthew Dunbabin, David Bastviken, Bradford Sherman, Catherine E. Lovelock, and Christopher D. Evans
Hydrol. Earth Syst. Sci., 22, 5281–5298, https://doi.org/10.5194/hess-22-5281-2018, https://doi.org/10.5194/hess-22-5281-2018, 2018
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Artificial water bodies are a major source of methane and an important contributor to flooded land greenhouse gas emissions. Past studies focussed on large water supply or hydropower reservoirs with small artificial water bodies (ponds) almost completely ignored. This regional study demonstrated ponds accounted for one-third of flooded land surface area and emitted over 1.6 million t CO2 eq. yr−1 (10 % of land use sector emissions). Ponds should be included in regional GHG inventories.
Sébastien Lamontagne, Frédéric Cosme, Andrew Minard, and Andrew Holloway
Hydrol. Earth Syst. Sci., 22, 4083–4096, https://doi.org/10.5194/hess-22-4083-2018, https://doi.org/10.5194/hess-22-4083-2018, 2018
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The dual nitrate isotope technique is one of the most commonly used approaches to study the origin and fate of N introduced in aquifers. In this study, we first demonstrate a large attenuation of groundwater N at a former industrial site, especially at the interface between surface and groundwater. We also provide evidence for a switch in the oxygen isotopic signature of groundwater due to this extensive N attenuation. This could be used to better quantify N attenuation processes in aquifers.
Susana Bernal, Anna Lupon, Núria Catalán, Sara Castelar, and Eugènia Martí
Hydrol. Earth Syst. Sci., 22, 1897–1910, https://doi.org/10.5194/hess-22-1897-2018, https://doi.org/10.5194/hess-22-1897-2018, 2018
Sam P. Jones, Jérôme Ogée, Joana Sauze, Steven Wohl, Noelia Saavedra, Noelia Fernández-Prado, Juliette Maire, Thomas Launois, Alexandre Bosc, and Lisa Wingate
Hydrol. Earth Syst. Sci., 21, 6363–6377, https://doi.org/10.5194/hess-21-6363-2017, https://doi.org/10.5194/hess-21-6363-2017, 2017
Martin E. Nowak, Valérie F. Schwab, Cassandre S. Lazar, Thomas Behrendt, Bernd Kohlhepp, Kai Uwe Totsche, Kirsten Küsel, and Susan E. Trumbore
Hydrol. Earth Syst. Sci., 21, 4283–4300, https://doi.org/10.5194/hess-21-4283-2017, https://doi.org/10.5194/hess-21-4283-2017, 2017
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In the present study we combined measurements of dissolved inorganic carbon (DIC) isotopes with a set of different geochemical and microbiological methods in order to get a comprehensive view of biogeochemical cycling and groundwater flow in two limestone aquifer assemblages. This allowed us to understand interactions and feedbacks between microbial communities, their carbon sources, and water chemistry.
Anna Lupon, Susana Bernal, Sílvia Poblador, Eugènia Martí, and Francesc Sabater
Hydrol. Earth Syst. Sci., 20, 3831–3842, https://doi.org/10.5194/hess-20-3831-2016, https://doi.org/10.5194/hess-20-3831-2016, 2016
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The influence of riparian evapotranspiration (ET) on stream hydrology and chemistry is poorly understood. We investigated temporal changes in riparian ET, stream discharge and nutrient chemistry along a Mediterranean catchment. Despite being a small component of annual water budgets (4.5 %), our results highlight that riparian ET drives stream and groundwater hydrology in Mediterranean catchments and, further, question the potential of the riparian zone as a natural filter of nitrogen loads.
Michael J. Pennino, Sujay S. Kaushal, Paul M. Mayer, Ryan M. Utz, and Curtis A. Cooper
Hydrol. Earth Syst. Sci., 20, 3419–3439, https://doi.org/10.5194/hess-20-3419-2016, https://doi.org/10.5194/hess-20-3419-2016, 2016
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The goal of this study was to compare how differences in urban stream restoration and sanitary infrastructure affect sources and fluxes of water and nutrients. Stream restoration reduced peak discharge and lowered nutrient export compared to unrestored streams, but was similar to a stream with upland stormwater management. The primary source of nitrate at all sites was leaky sanitary sewers, suggesting that combining stream restoration with sanitary pipe repairs may help reduce nutrient loads.
Pauline Humez, Bernhard Mayer, Michael Nightingale, Veith Becker, Andrew Kingston, Stephen Taylor, Guy Bayegnak, Romain Millot, and Wolfram Kloppmann
Hydrol. Earth Syst. Sci., 20, 2759–2777, https://doi.org/10.5194/hess-20-2759-2016, https://doi.org/10.5194/hess-20-2759-2016, 2016
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Development of unconventional energy resources if often associated with public concerns regarding potential contamination of shallow groundwater due to methane leakage. We combined chemical and isotopic analyses of gas and water samples obtained from shallow aquifers in Alberta (Canada) to assess baseline methane sources and found that > 67 % of the samples contained biogenic methane formed in situ in the aquifers. There was no evidence of deep thermogenic methane migration into shallow aquifers.
D. Graeber, G. Goyenola, M. Meerhoff, E. Zwirnmann, N. B. Ovesen, M. Glendell, J. Gelbrecht, F. Teixeira de Mello, I. González-Bergonzoni, E. Jeppesen, and B. Kronvang
Hydrol. Earth Syst. Sci., 19, 2377–2394, https://doi.org/10.5194/hess-19-2377-2015, https://doi.org/10.5194/hess-19-2377-2015, 2015
M. C. Pierret, P. Stille, J. Prunier, D. Viville, and F. Chabaux
Hydrol. Earth Syst. Sci., 18, 3969–3985, https://doi.org/10.5194/hess-18-3969-2014, https://doi.org/10.5194/hess-18-3969-2014, 2014
K. S. Song, S. Y. Zang, Y. Zhao, L. Li, J. Du, N. N. Zhang, X. D. Wang, T. T. Shao, Y. Guan, and L. Liu
Hydrol. Earth Syst. Sci., 17, 4269–4281, https://doi.org/10.5194/hess-17-4269-2013, https://doi.org/10.5194/hess-17-4269-2013, 2013
C. T. Chang, S. P. Hamburg, J. L. Hwong, N. H. Lin, M. L. Hsueh, M. C. Chen, and T. C. Lin
Hydrol. Earth Syst. Sci., 17, 3815–3826, https://doi.org/10.5194/hess-17-3815-2013, https://doi.org/10.5194/hess-17-3815-2013, 2013
K. M. McEathron, M. J. Mitchell, and L. Zhang
Hydrol. Earth Syst. Sci., 17, 2557–2568, https://doi.org/10.5194/hess-17-2557-2013, https://doi.org/10.5194/hess-17-2557-2013, 2013
R. Balestrini, C. Arese, M. Freppaz, and A. Buffagni
Hydrol. Earth Syst. Sci., 17, 989–1001, https://doi.org/10.5194/hess-17-989-2013, https://doi.org/10.5194/hess-17-989-2013, 2013
L. L. Wang, C. C. Song, and G. S. Yang
Hydrol. Earth Syst. Sci., 17, 371–378, https://doi.org/10.5194/hess-17-371-2013, https://doi.org/10.5194/hess-17-371-2013, 2013
A. J. Wade, E. J. Palmer-Felgate, S. J. Halliday, R. A. Skeffington, M. Loewenthal, H. P. Jarvie, M. J. Bowes, G. M. Greenway, S. J. Haswell, I. M. Bell, E. Joly, A. Fallatah, C. Neal, R. J. Williams, E. Gozzard, and J. R. Newman
Hydrol. Earth Syst. Sci., 16, 4323–4342, https://doi.org/10.5194/hess-16-4323-2012, https://doi.org/10.5194/hess-16-4323-2012, 2012
E. Samaritani, J. Shrestha, B. Fournier, E. Frossard, F. Gillet, C. Guenat, P. A. Niklaus, N. Pasquale, K. Tockner, E. A. D. Mitchell, and J. Luster
Hydrol. Earth Syst. Sci., 15, 1757–1769, https://doi.org/10.5194/hess-15-1757-2011, https://doi.org/10.5194/hess-15-1757-2011, 2011
Cited articles
Abbott, B. W., Jones, J. B., Godsey, S. E., Larouche, J. R., and Bowden, W.
B.: Patterns and persistence of hydrologic carbon and nutrient export from
collapsing upland permafrost, J. Geophys. Res.-Biogeo., 12, 3725–3740, 2015.
Ågren, A., Buffam, I., Jansson, M., and Laudon, H.: Importance of
seasonality and small streams for the landscape regulation of dissolved
organic carbon export. J. Geophys. Res.-Biogeo., 112, G03003, https://doi.org/10.1029/2006JG000381, 2007.
Ågren, A., Haei, M., Kohler, S. J., Bishop, K., and Laudon, H.:
Regulation of stream water dissolved organic carbon (DOC) concentrations
during snowmelt: The role of discharge, winter climate and memory effects,
J. Geophys. Res.-Biogeo., 7, 2901–2913, https://doi.org/10.5194/bg-7-2901-2010, 2010.
Bache, S. M. and Wickham, H.: magrittr: A Forward-Pipe Operator for R. R
package version 1.5, available at: https://CRAN.R-project.org/package=magrittr (last access: 1 February 2019), 2014.
Balcarczyk, K. L., Jones, J. B., Jaffé, R., and Maie, N.: Stream
dissolved organic matter bioavailability and composition in watersheds
underlain with discontinuous permafrost, Biogeochemistry, 94, 255–270,
2009.
Bishop, K., Buffam, I., Erlandsson, M., Fölster, J., Laudon, H.,
Seibert, J., and Temnerud, J.: Aqua Incognita: the unknown headwaters,
Hydrol. Process., 22, 1239–1242, 2008.
Boyer, E. W., Hornberger, G. M., Bencala, K. E., and McKnight, D. M.:
Effects of asynchronous snowmelt on flushing of dissolved organic carbon: a
mixing model approach, Hydrol. Process., 14, 3291–3308, 2000.
Bring, A., Fedorova, I., Dibike, Y., Hinzman, L., Mård, J., Mernild, S.
H., Prowse, T., Semenova, O., and Woo, M. K.: Arctic terrestrial hydrology:
A synthesis of processes, regional effects, and research challenges, J. Geophys. Res.-Biogeo., 121, 621–649, 2016.
Brooks, P. D. and Lemon, M. M.: Spatial variability in dissolved organic
matter and inorganic nitrogen concentrations in a semiarid stream, San Pedro
River, Arizona, J. Geophys. Res.-Biogeo., 112, G03S05, https://doi.org/10.1029/2006JG000262, 2007.
Buffam, I., Laudon, H., Temnerud, J., Mörth, C. M., and Bishop, K.:
Landscape-scale variability of acidity and dissolved organic carbon during
spring flood in a boreal stream network, J. Geophys. Res.-Biogeo., 112,
G01022, https://doi.org/10.1029/2006JG000218, 2007.
Burd, K., Tank, S. E., Dion, N., Quinton, W. L., Spence, C., Tanentzap, A. J., and Olefeldt, D.: Seasonal shifts in export of DOC and nutrients from burned and unburned peatland-rich catchments, Northwest Territories, Canada, Hydrol. Earth Syst. Sci., 22, 4455–4472, https://doi.org/10.5194/hess-22-4455-2018, 2018.
Carey, S. K.: Dissolved organic carbon fluxes in a discontinuous permafrost
subarctic alpine catchment, Permafrost Periglac., 14, 161–171, 2003.
Carey, S. K., Boucher, J. L., and Duarte, C. M.: Inferring groundwater
contributions and pathways to streamflow during snowmelt over multiple years
in a discontinuous permafrost subarctic environment (Yukon, Canada),
Hydrogeol. J., 21, 67–77, 2013a.
Carey, S. K., Tetzlaff, D., Buttle, J., Laudon, H., McDonnell, J., McGuire,
K., Seibert, J., Soulsby, C., and Shanley, J.: Use of color maps and wavelet
coherence to discern seasonal and interannual climate influences on
streamflow variability in northern catchments, Water Resour. Res., 49, 6194–6207, 2013b.
CCRN – Changing Cold Regions Network: Programmes Data, available at: http://ccrnetwork.ca/outputs/data/, last access: 19 January 2019.
Cory, R. M. and McKnight, D. M.: Fluorescence spectroscopy reveals
ubiquitous presence of oxidized and reduced quinones in dissolved organic
matter, Environ. Sci. Technol., 39, 8142–8149, 2005.
Cory, R. M., Ward, C. P., Crump, B. C., and Kling, G. W.: Sunlight controls
water column processing of carbon in arctic fresh waters, Science, 345, 925–928, 2014.
Creed, I. F., McKnight, D. M., Pellerin, B. A., Green, M. B., Bergamaschi,
B. A., Aiken, G. R., Burns, D. A., Findlay, S. E. G., Shanley, J. B.,
Striegl, R. G., Aulenbach, B. T., Clow, D. W., Laudon, H., McGlynn, B. L.,
McGuire, K. J., Smith, R. A., and Stackpoole, S. M.: The river as a
chemostat: fresh perspectives on dissolved organic matter flowing down the
river continuum, Can. J. Fish. Aquat. Sci., 72, 1272–1285, 2015.
Davidson, E. A. and Janssens, I. A.: Temperature sensitivity of soil carbon
decomposition and feedbacks to climate change, Nature, 440, 165–173, 2006.
DeBeer, C. M., Wheater, H. S., Carey, S. K., and Chun, K. P.: Recent climatic, cryospheric, and hydrological changes over the interior of western Canada: a review and synthesis, Hydrol. Earth Syst. Sci., 20, 1573–1598, https://doi.org/10.5194/hess-20-1573-2016, 2016.
Dittmar, T. and Kattner, G.: The biogeochemistry of the river and shelf
ecosystem of the Arctic Ocean: a review, Mar. Chem., 83, 103–120, 2003.
Dixon, R. K., Solomon, A. M., Brown, S., Houghton, R. A., Trexier, M. C.,
and Wisniewski, J.: Carbon pools and flux of global forest ecosystems,
Science, 263, 185–190, 1994.
Fellman, J. B., Hood, E., and Spencer, R. G.: Fluorescence spectroscopy
opens new windows into dissolved organic matter dynamics in freshwater
ecosystems: A review, Limnol. Oceanogr., 55, 2452–2462, 2010.
Finlay, J., Neff, J., Zimov, S., Davydova, A., and Davydov, S.: Snowmelt
dominance of dissolved organic carbon in high-latitude watersheds:
Implications for characterization and flux of river DOC, Geophys. Res.
Lett., 33, 10, 2006.
Finlay, J. C., Hood, J. M., Limm, M. P., Power, M. E., Schade, J. D., and
Welter, J. R.: Light-mediated thresholds in stream-water nutrient
composition in a river network, Ecology, 92, 140–150, https://doi.org/10.1890/09-2243.1, 2011.
Frey, K. E. and Smith, L. C.: Amplified carbon release from vast West
Siberian peatlands by 2100, Geophys. Res. Lett., 32, L09401, https://doi.org/10.1029/2004GL022025, 2005.
Frey, K. E. and McClelland, J. W.: Impacts of permafrost degradation on
arctic river biogeochemistry, Hydrol. Process., 23, 169–182,
https://doi.org/10.1002/hyp.7196, 2009.
Frey, K. E., Sobczak, W. V., Mann, P. J., and Holmes, R. M.: Optical properties and bioavailability of dissolved organic matter along a flow-path continuum from soil pore waters to the Kolyma River mainstem, East Siberia, Biogeosciences, 13, 2279–2290, https://doi.org/10.5194/bg-13-2279-2016, 2016.
Gordeev, V. V., Martin, J. M., Sidorov, I. S., and Sidorova, M. V.: A
reassessment of the Eurasian river input of water, sediment, major elements,
and nutrients to the Arctic Ocean, Am. J. Sci., 296, 664–691, 1996.
Grolemund, G. and Wickham, H.: Dates and Times Made Easy with lubridate, J.
Stat. Soft., 40, 1–25, 2011.
Guo, L., Cai, Y., Belzile, C., and Macdonald, R. W.: Sources and export
fluxes of inorganic and organic carbon and nutrient species from the
seasonally ice-covered Yukon River, Biogeochemistry, 107, 187–206,
https://doi.org/10.1007/s10533-010-9545-z, 2012.
Haei, M., Öquist, M. G., Buffam, I., Ågren, A., Blomkvist, P.,
Bishop, K., Ottosson Löfvenius, M., and Laudon, H.: Cold winter soils
enhance dissolved organic carbon concentrations in soil and stream water,
Geophys. Res. Lett., 37, L08501, https://doi.org/10.1029/2010GL042821, 2010.
Hansen, A. M., Kraus, T. E., Pellerin, B. A., Fleck, J. A., Downing, B. D.,
and Bergamaschi, B. A.: Optical properties of dissolved organic matter
(DOM): Effects of biological and photolytic degradation, Limnol. Oceanogr.,
61, 1015–1032, 2016.
Harms, T. K., Edmonds, J. W., Genet, H., Creed, I. F., Aldred, D., Balser,
A., and Jones, J. B.: Catchment influence on nitrate and dissolved organic
matter in Alaskan streams across a latitudinal gradient, J. Geophys. Res.-Biogeo., 121, 350–369, 2016.
Herod, M. N., Li, T., Pellerin, A., Kieser, W. E., and Clark, I. D.: The
seasonal fluctuations and accumulation of iodine-129 in relation to the
hydrogeochemistry of the Wolf Creek Research Basin, a discontinuous
permafrost watershed, Sci. Total Environ., 569, 1212–1223, 2016.
Holmes, R. M., McClelland, J. W., Raymond, P. A., Frazer, B. B., Peterson,
B. J., and Stieglitz, M.: Lability of DOC transported by Alaskan rivers to
the Arctic Ocean, Geophys. Res. Lett., 35, L03402, https://doi.org/10.1029/2007GL032837, 2008.
Holmes, R. M., McClelland, J. W., Peterson, B. J., Tank, S. E., Bulygina,
E., Eglinton, T. I., Gordeev, V. V., Gurtovaya, T. Y., Raymond, P. A.,
Repeta, D. J., Staples, R., Striegl, R. G., Zhulidov, V., and Zimov, S.
A.: Seasonal and annual fluxes of nutrients and organic matter from large
rivers to the Arctic Ocean and surrounding seas, Estuaries Coasts, 35, 369–382, https://doi.org/10.1007/ s12237-011-9386-6, 2012.
Hudson, N., Baker, A., and Reynolds, D.: Fluorescence analysis of dissolved organic matter in natural, waste and polluted waters – a review, Riv. Res. Appl., 23, 631–649, https://doi.org/10.1002/rra.1005, 2007.
Hugelius, G., Strauss, J., Zubrzycki, S., Harden, J. W., Schuur, E. A. G., Ping, C.-L., Schirrmeister, L., Grosse, G., Michaelson, G. J., Koven, C. D., O'Donnell, J. A., Elberling, B., Mishra, U., Camill, P., Yu, Z., Palmtag, J., and Kuhry, P.: Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps, Biogeosciences, 11, 6573–6593, https://doi.org/10.5194/bg-11-6573-2014, 2014.
Huguet, A., Roux-De Balmann, H., and Parlanti, E.: Fluorescence spectroscopy
applied to the optimisation of a desalting step by electrodialysis for the
characterisation of marine organic matter, J. Membrane Biol., 326, 186–196,
2009.
Jaffé, R., McKnight, D., Maie, N., Cory, R., McDowell, W. H., and
Campbell, J. L.: Spatial and temporal variations in DOM composition in
ecosystems: The importance of long-term monitoring of optical properties, J. Geophys. Res.-Biogeo., 113, G04032, https://doi.org/10.1029/2008JG000683, 2008.
Johnston, S. E., Shorina, N., Bulygina, E., Vorobjeva, T., Chupakova, A.,
Klimov, S. I., Kellerman, A. M., Guillemette, F., Shiklomanov, A.,
Podgorski, D. C., and Spencer, R. G.: Flux and seasonality of dissolved
organic matter from the Northern Dvina (Severnaya Dvina) River, Russia, J. Geophys. Res.-Biogeo., 123, 1041–1056, 2018.
Kaiser, H. F. and Rice, J.: Little jiffy, mark IV, Educ. Psychol. Meas., 34, 111–117, 1974.
Kalbitz, K., Solinger, S., Park, J. H., Michalzik, B., and Mtzner, E.:
Controls on the dynamics of dissolved organic matter in soils: a review,
Soil Sci., 165, 277–304, 2000.
Kassambara, A.: ggpubr: “ggplot2” Based Publication Ready Plots, R
package version 0.1.7, available at: https://CRAN.R-project.org/package=ggpubr (last access: August 2019), 2018.
Kawahigashi, M., Kaiser, K., Kalbitz, K., Rodionov, A., and Guggenberger,
G.: Dissolved organic matter in small streams along a gradient from
discontinuous to continuous permafrost, Global Change Biol., 10, 1576–1586, 2004.
Kawahigashi, M., Kaiser, K., Rodionov, A., and Guggenberger, G.: Sorption of
dissolved organic matter by mineral soils of the Siberian forest tundra,
Global Change Biol., 12, 1868–1877, 2006.
Kellerman, A. M., Guillemette, F., Podgorski, D. C., Aiken, G. R., Butler,
K. D., and Spencer, R. G.: Unifying concepts linking dissolved organic
matter composition to persistence in aquatic ecosystems, Environ. Sci.
Technol., 52, 2538–2548, 2018.
Kicklighter, D. W., Hayes, D. J., McClelland, J. W., Peterson, B. J.,
McGuire, A. D., and Melillo, J. M.: Insights and issues with simulating
terrestrial DOC loading of Arctic river networks, Ecol. Appl., 23, 1817–1836, https://doi.org/10.1890/11-1050.1, 2013.
Koch, J. C., Runkel, R. L., Striegl, R., and McKnight, D. M.: Hydrologic
controls on the transport and cycling of carbon and nitrogen in a boreal
catchment underlain by continuous permafrost, J. Geophys. Res.-Biogeo.,
118, 698–712, 2013.
Larouche, J. R., Abbott, B. W., Bowden, W. B., and Jones, J. B.: The role of
watershed characteristics, permafrost thaw, and wildfire on dissolved
organic carbon biodegradability and water chemistry in Arctic headwater
streams, J. Geophys. Res.-Biogeo., 12, 4221–4233, 2015.
Laudon, H., Buttle, J., Carey, S. K., McDonnell, J., McGuire, K., Seibert,
J., Shanley, J., Soulsby, C., and Tetzlaff, D.: Cross-regional prediction of
long-term trajectory of stream water DOC response to climate change, Geophys. Res. Lett., 39, L18404, https://doi.org/10.1029/2012GL053033, 2012.
Laudon, H., Tetzlaff, D., Soulsby, C., Carey, S., Seibert, J., Buttle, J.,
Shanley, J., McDonnell, J. J., and McGuire, K.: Change in winter climate
will affect dissolved organic carbon and water fluxes in mid-to-high
latitude catchments, Hydrol. Process., 27, 700–709, 2013.
Lewkowicz, A. G. and Ednie, M.: Probability mapping of mountain permafrost
using the BTS method, Wolf Creek, Yukon Territory, Canada, Permafrost Periglac., 15, 67–80, 2004.
Li Yung Lung, J. Y. S., Tank, S. E., Spence, C., Yang, D., Bonsal, B.,
McClelland, J. W., and Holmes, R.: Seasonal and Geographic Variation in
Dissolved Organic Biogeochemistry of Rivers Draining to the Arctic Ocean and
Hudson Bay, J. Geophys. Res.-Biogeo., 123, 3371–3386, 2018.
Littlefair, C. A., Tank, S. E., and Kokelj, S. V.: Retrogressive thaw slumps
temper dissolved organic carbon delivery to streams of the Peel Plateau,
NWT, Canada, J. Geophys. Res.-Biogeo., 14, 5487–5505, 2017.
MacLean, R., Oswood, M. W., Irons, J. G., and McDowell, W. H.: The effect of
permafrost on stream biogeochemistry: a case study of two streams in the
Alaskan (USA) taiga, Biogeochemistry, 47, 239–267, 1999.
Manizza, M., Follows, M. J., Dutkiewicz, S., McClelland, J. W., Menemenlis,
D., Hill, C. N., Townsend-Small, A., and Peterson, B. J.: Modeling transport
and fate of riverine dissolved organic carbon in the Arctic Ocean, Global
Biogeochem. Cy., 23, GB4006, https://doi.org/10.1029/2008GB003396, 2009.
Mann, P. J., Eglinton, T. I., McIntyre, C. P., Zimov, N., Davydova, A., Vonk, J. E., Holmes, R. M., and Spencer, R. G. M.: Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks, Nat. Commun., 6, 7856, https://doi.org/10.1038/ncomms8856, 2015.
McCartney, S. E., Carey, S. K., and Pomeroy, J. W.: Intra-basin variability of snowmelt water balance calculations in a subarctic catchment, Hydrol. Process., 20, 1001–1016, https://doi.org/10.1002/hyp.6125, 2006.
McClelland, J. W., Stieglitz, M., Pan, F., Holmes, R. M., and Peterson, B.
J.: Recent changes in nitrate and dissolved organic carbon export from the
upper Kuparuk River, North Slope, Alaska, J. Geophys. Res.-Biogeo., 112, GB4006, https://doi.org/10.1029/2008GB003396, 2007.
McGuire, A. D., Anderson, L. G., Christensen, T. R., Dallimore, S., Guo, L.,
Hayes, D. J., Heimann, M., Loreenson, T. D., MacDonald, R. W., and Roulet,
N.: Sensitivity of the carbon cycle in the Arctic to climate change, Ecol.
Monogr., 79, 523–555, 2009.
McKnight, D. M., Boyer, E. W., Westerhoff, P. K., Doran, P. T., Kulbe, T.,
and Andersen, D. T.: Spectrofluorometric characterization of dissolved
organic matter for indication of precursor organic material and aromaticity,
Limnol. Oceanogr., 46, 38–48, https://doi.org/10.4319/lo.2001.46.1.0038, 2001.
MSC – Meteorological Service of Canada: National climate data archive of
Canada, Environment Canada, Dorval, QB, 2017.
Mu, C. C., Abbott, B. W., Zhao, Q., Su, H., Wang, S. F., Wu, Q. B., Zhang,
T. J., and Wu, X. D.: Permafrost collapse shifts alpine tundra to a carbon
source but reduces N2O and CH4 release on the northern Qinghai-Tibetan
Plateau, Geophys. Res. Lett., 44, 8945–8952, 2017.
Murphy, K. R., Stedmon, C. A., Graeber, D., and Bro, R.: Fluorescence
spectroscopy and multi-way techniques PARAFAC, Anal. Methods, 5,
6557–6566, 2013.
Mutschlecner, A. E., Guerard, J. J., Jones, J. B., and Harms, T. K.:
Regional and intra-annual stability of dissolved organic matter composition
and biolability in high-latitude Alaskan rivers, Limnol. Oceanogr., 63, 1605–1621, https://doi.org/10.1002/lno.10795, 2018.
Nava, V., Patelli, M., Rotiroti, M., and Leoni, B.: An R package for estimating river compound load using different methods, Environ. Model. Softw., 117, 108, https://doi.org/10.1016/j.envsoft.2019.03.012, 2019.
Neff, J. C., Finlay, J. C., Zimov, S. A., Davydov, S. P., Carrasco, J. J.,
Schuur, E. A. G., and Davydova, A. I.: Seasonal changes in the age and
structure of dissolved organic carbon in Siberian rivers and streams,
Geophys. Res. Lett., 33, L23401, https://doi.org/10.1029/2006GL028222, 2006.
O'Donnell, J. A. and Jones, J. B.: Nitrogen retention in the riparian zone
of catchments underlain by discontinuous permafrost, Freshwater Biol., 51, 854–864, 2006.
O'Donnell, J. A., Aiken, G. R., Kane, E. S., and Jones, J. B.: Source water
controls on the character and origin of dissolved organic matter in streams
of the Yukon River basin, Alaska, J. Geophys. Res.-Biogeo., 115, G03025, https://doi.org/10.1029/2009JG001153, 2010.
Ohno, T.: Fluorescence inner-filtering correction for determining the
humification index of dissolved organic matter, Environ. Sci. Technol., 36, 742–746, 2002.
Olefeldt, D. and Roulet, N. T.: Permafrost conditions in peatlands regulate
magnitude, timing, and chemical composition of catchment dissolved organic
carbon export, Global Change Biol., 20, 3122–3136, 2014.
Olefeldt, D., Roulet, N., Giesler, R., and Persson, A.: Total waterborne
carbon export and DOC composition from ten nested subarctic peatland
catchments–importance of peatland cover, groundwater influence, and
inter-annual variability of precipitation patterns, Hydrol. Process., 27, 2280–2294, 2013.
Opsahl, S., Benner, R., and Amon, R. W.: Major flux of terrigenous dissolved
organic matter through the Artic Ocean, Limnol. Oceanogr., 44, 2017–2023,
1999.
Parlanti, E., Wörz, K., Geoffroy, L., and Lamotte, M.: Dissolved organic
matter fluorescence spectroscopy as a tool to estimate biological activity
in a coastal zone submitted to anthropogenic inputs, Org. Geochem., 31,
1765–1781, 2000.
Peralta-Tapia, A., Sponseller, R. A., Ågren, A., Tetzlaff, D., Soulsby,
C., and Laudon, H.: Scale-dependent groundwater contributions influence
patterns of winter baseflow stream chemistry in boreal catchments, J. Geophys. Res.-Biogeo., 120, 847–858, 2015.
Petrone, K., Buffam, I., and Laudon, H.: Hydrologic and biotic control of
nitrogen export during snowmelt: a combined conservative and reactive tracer
approach, Water Resour. Res., 43, W06420, https://doi.org/10.1029/2006WR005286, 2007.
Petrone, K. C., Jones, J. B., Hinzman, L. D., and Boone, R. D.: Seasonal
export of carbon, nitrogen, and major solutes from Alaskan catchments with
discontinuous permafrost, J. Geophys. Res., 111, G02020,
https://doi.org/10.1029/2005JG000055, 2006.
Pomeroy, J. W., Hedstrom, N., and Parviainen, J.: The snow mass balance of
Wolf Creek, Yukon: effects of snow sublimation and redistribution, Wolf
Creek Research Basin: Hydrology, Ecology, Environment, edited by: Pomeroy,
J. W. and Granger, R. J., National Water Research Institute, 15–30, available at: http://www.ccrnetwork.ca/news-events/news/2017/wolf-creek-25-years.php (last access: August 2019), 1999.
Prokushkin, A. S., Pokrovsky, O. S., Shirokova, L. S., Korets, M. A., Viers,
J., Prokushkin, S. G., Amon, R. M. W., Guggenberger, G., and McDowell, W.
H.: Sources and the flux pattern of dissolved carbon in rivers of the
Yenisey basin draining the Central Siberian Plateau, Environ. Res. Lett., 6, 045212, https://doi.org/10.1088/1748-9326/6/4/045212, 2011.
Quinton, W. L. and Carey, S. K.: Towards an energy-based runoff generation
theory for tundra landscapes, Hydrol. Process., 22, 4649–4653, 2008.
Rasouli, K., Pomeroy, J. W., Janowicz, J. R., Williams, T. J., and Carey, S. K.: A long-term hydrometeorological dataset (1993–2014) of a northern mountain basin: Wolf Creek Research Basin, Yukon Territory, Canada, Earth Syst. Sci. Data, 11, 89–100, https://doi.org/10.5194/essd-11-89-2019, 2019.
Raymond, P. A., McClelland, J. W., Holmes, R. M., Zhulidov, A. V., Mull, K.,
Peterson, B. J., Striegl, R. G., Aiken, G. R., and Gurtovaya, T. Y.: Flux
and age of dissolved organic carbon exported to the Arctic Ocean: A carbon
isotopic study of the five largest arctic rivers, Global Biogeochem. Cy.,
21, GB4011, https://doi.org/10.1029/2007GB002934, 2007.
R Core Team: R: A language and environment for statistical computing, R
Foundation for Statistical Computing, Vienna, Austria, available at: https://www.R-project.org/ (last access: 1 February 2019), 2017.
Schloerke, B., Crowley, J., Cook, D., Briatte, F., Marbach, M., Thoen, E.,
Elberg, A., and Larmarange, J.: GGally: Extension to “ggplot2”, R package
version 1.4.0, available at: https://CRAN.R-project.org/package=GGally (last access: 1 February 2019), 2018.
Schmidt, B. H., Kalbitz, K., Braun, S., Fuß, R., McDowell, W. H., and
Matzner, E.: Microbial immobilization and mineralization of dissolved
organic nitrogen from forest floors, Soil Biol. Biochem., 43, 1742–1745,
2011.
Schuur, E. A. G., McGuire, A. D., Schädel, C., Grosse, G., Harden, J.
W., Hayes, D. J., Hugelius, G., Koven, C. D., Kuhry, P., Lawrence, D. M.,
Natali, S. M., Olefeldt, D., Romanovsky, V. E., Schaefer, K., Turetsky, M.
R., Treat, C. C., and Vonk, J. E.: Climate change and the permafrost carbon
feedback, Nature, 520, 171–179, https://doi.org/10.1038/nature14338, 2015.
Sedell, J. R. and Dahm, C. N.: Spatial and temporal scales of dissolved
organic carbon in streams and rivers, Organic acids in aquatic ecosystems,
edited by: Perdue, E. M. and Gjessing, E. T., John Wiley & Sons Ltd,
Berlin, Germany, 261–279, 1990.
Serreze, M. C. and Francis, J. A.: The Arctic amplification debate, Clim.
Change, 76, 241–264, 2006.
Shiklomanov, I. A.: Appraisal and assessment of world water resources, Water
Int., 25, 11–32, https://doi.org/10.1080/02508060008686794,
2000.
Spence, C. and Rausch, J.: Autumn synoptic conditions and rainfall in the
subarctic Canadian Shield of the Northwest Territories, Canada, Int. J.
Climatol., 25, 1493–1506, 2005.
Spence, C., Kokelj, S. V., Kokelj, S. A., McCluskie, M., and Hedstrom, N.: Evidence of a change in water chemistry in Canada's subarctic associated
with enhanced winter streamflow, J. Geophys. Res.-Biogeo., 120,
113–127, 2015.
Spencer, R. G., Aiken, G. R., Butler, K. D., Dornblaser, M. M., Striegl, R.
G., and Hernes, P. J.: Utilizing chromophoric dissolved organic matter
measurements to derive export and reactivity of dissolved organic carbon
exported to the Arctic Ocean: A case study of the Yukon River, Alaska,
Geophys. Res. Lett., 36, https://doi.org/10.3389/feart.2015.00063, 2009.
Spencer, R. G., Butler, K. D., and Aiken, G. R.: Dissolved organic carbon and
chromophoric dissolved organic matter properties of rivers in the USA, J. Geophys. Res.-Biogeo., 117, G03001, https://doi.org/10.1029/2011JG001928, 2012.
Spencer, R. G. M., Aiken, G. R., Wickland, K. P., Striegl, R. G., and
Hernes, P. J.: Seasonal and spatial variability in dissolved organic matter
quantity and composition from the Yukon River basin, Alaska: Yukon River
basin DOM dynamics, Global Biogeochem. Cy., 22, GB4002, https://doi.org/10.1029/2008GB003231, 2008.
Stedmon, C. A., Amon, R. M. W., Rinehart, A. J., and Walker, S. A.: The
supply and characteristics of colored dissolved organic matter (CDOM) in the
Arctic Ocean: Pan Arctic trends and differences, Mar. Chem., 124,
108–118, 2011.
Striegl, R. G., Aiken, G. R., Dornblaser, M. M., Raymond, P. A., and
Wickland, K. P.: A decrease in discharge-normalized DOC export by the Yukon
River during summer through autumn, Geophys. Res. Lett., 32, L21413, https://doi.org/10.1029/2005GL024413, 2005.
Striegl, R. G., Dornblaser, M. M., Aiken, G. R., Wickland, K. P., and
Raymond, P. A.: Carbon export and cycling by the Yukon, Tanana, and
Porcupine Rivers, Alaska, 2001–2005, Water Resour. Res., 43, W02411,
https://doi.org/10.1029/2006WR005201, 2007.
Tang, Y., Horikoshi, M., and Li, W.: ggfortify: Unified Interface to
Visualize Statistical Result of Popular R Packages, The R Journal 8.2,
478–489, available at: https://CRAN.R-project.org/package=ggfortify (last access: 1 February 2019), 2016.
Tank, S. E., Striegl, R. G., McClelland, J. W., and Kokelj, S. V.:
Multi-decadal increases in dissolved organic carbon and alkalinity flux from
the Mackenzie drainage basin to the Arctic Ocean, Environ. Res. Lett.,
11, 054015, https://doi.org/10.1088/1748-9326/11/5/054015, 2016.
Tarnocai, C., Canadell, J. G., Schuur, E. A. G., Kuhry, P., Mazhitova, G.,
and Zimov, S.: Soil organic carbon pools in the northern circumpolar
permafrost region, Global Biogeochem. Cy., 23, GB2023, https://doi.org/10.1029/2008GB003327, 2009.
Temnerud, J. and Bishop, K.: Spatial variation of streamwater chemistry in
two Swedish boreal catchments: Implications for environmental assessment,
Environ. Sci. Technol., 39, 1463–1469, 2005.
Temnerud, J., Fölster, J., Buffam, I., Laudon, H., Erlandsson, M., and
Bishop, K.: Can the distribution of headwater stream chemistry be predicted
from downstream observations?, Hydrol. Process., 24, 2269–2276, 2010.
Tiwari, T., Laudon, H., Beven, K., and Ågren, A. M.: Downstream changes
in DOC: Inferring contributions in the face of model uncertainties, Water
Resour. Res., 50, 514–525, 2014.
Tiwari, T., Buffam, I., Sponseller, R. A., and Laudon, H.: Inferring
scale-dependent processes influencing stream water biogeochemistry from
headwater to sea, Limnol. Oceanogr., 62, S58–S70, https://doi.org/10.1002/lno.10738, 2017.
Tiwari, T., Sponseller, R. A., and Laudon, H.: Extreme Climate Effects on
Dissolved Organic Carbon Concentrations During Snowmelt, J. Geophys. Res.-Biogeo., 123, 1277–1288, 2018.
Toohey, R. C., Herman-Mercer, N. M., Schuster, P. F., Mutter, E. A., and
Koch, J. C.: Multidecadal increases in the Yukon River Basin of chemical
fluxes as indicators of changing flowpaths, groundwater, and permafrost,
Geophys. Res. Lett., 43, https://doi.org/10.1002/2016GL070817, 2016.
Ussiri, D. A. and Johnson, C. E.: Sorption of organic carbon fractions by
Spodosol mineral horizons, Soil Sci. Soc. Am. J., 68, 253–262, 2004.
Vonk, J. E., Tank, S. E., Bowden, W. B., Laurion, I., Vincent, W. F.,
Alekseychik, P., Amyot, M., Billet, M. F., Canario, J., Cory, R. M.,
Deshpande, B. N., Helbig, M., Jammet, M., Karlsson, J., Larouche, MacMillan,
G., Rautio, M., Walther Anthony, K. M., and Wickland, K. P.: Reviews and
syntheses: Effects of permafrost thaw on Arctic aquatic ecosystems, J. Geophys. Res.-Biogeo., 12, 7129–7167, https://doi.org/10.5194/bg-12-7129-2015,
2015.
Walker, S. A., Amon, R. M., and Stedmon, C. A.: Variations in high-latitude
riverine fluorescent dissolved organic matter: A comparison of large Arctic
rivers, J. Geophys. Res.-Biogeo., 118, 1689–1702, 2013.
Walvoord, M. A. and Striegl, R. G.: Increased groundwater to stream
discharge from permafrost thawing in the Yukon River basin: Potential
impacts on lateral export of carbon and nitrogen, Geophys. Res. Lett., 34, L12402, https://doi.org/10.1029/2007GL030216, 2007.
Ward, C. P. and Cory, R. M.: Complete and partial photo-oxidation of
dissolved organic matter draining permafrost soils, Environ. Sci. Technol.,
50, 3545–3553, 2016.
Weishaar, J. L., Aiken, G. R., Bergamaschi, B. A., Fram, M. S., Fujii, R.,
and Mopper, K.: Evaluation of specific ultraviolet absorbance as an indicator
of the chemical composition and reactivity of dissolved organic carbon,
Environ. Sci. Technol., 37, 4702–4708, https://doi.org/10.1021/es030360x, 2003.
Wickham, H.: ggplot2: Elegant Graphics for Data Analysis, R package version
3.1.0.9000, available at: http://ggplot2.org (last access: 1 February 2019), 2016.
Wickham, H. and Henry, L.: tidyr: Easily Tidy Data with “spread()” and
“gather()” Functions, R package version 0.8.1,
available at: https://CRAN.R-project.org/package=tidyr (last access: 1 February 2019), 2018.
Wickham, H., François, R., Henry, L., and Müller, K.: dplyr: A
Grammar of Data Manipulation, R package version 0.7.6,
available at: https://CRAN.R-project.org/package=dplyr (last access: 1 February 2019), 2018.
Wickland, K. P., Neff, J. C., and Aiken, G. R.: Dissolved organic carbon in
Alaskan boreal forest: sources, chemical characteristics, and
biodegradability, Ecosystems, 10, 1323–1340, https://doi.org/10.1007/s10021-007-9101-4, 2007.
Wickland, K. P., Aiken, G. R., Butler, K., Dornblaser, M. M., Spencer, R. G.
M., and Striegl, R. G.: Biodegradability of dissolved organic carbon in the
Yukon River and its tributaries: Seasonality and importance of inorganic
nitrogen, Global Biogeochem. Cy, 26, GB0E03, https://doi.org/10.1029/2012GB004342, 2012.
Wilson, H. F. and Xenopoulos, M. A.: Effects of agricultural land use on
the composition of fluvial dissolved organic matter, Nat. Geosci., 2,
37–41, 2009.
Wolock, D. M., Fan, J., and Lawrence, G. B.: Effects of basin size on
low-flow stream chemistry and subsurface contact time in the Neversink River
watershed, New York, Hydrol. Process., 11, 1273–1286, 1997.
Wrona, F. J., Johansson, M., Culp, J. M., Jenkins, A., Mård, J.,
Myers-Smith, I. H., Prowse, D. T., Vincent, W. F., and Wookey, P. A.:
Transitions in Arctic ecosystems: Ecological implications of a changing
hydrological regime, J. Geophys. Res.-Biogeo., 121, 650–674, 2016.
Zsolnay, A., Baigar, E., Jimenez, M., Steinweg, B., and Saccomandi, F.:
Differentiating with fluorescence spectroscopy the sources of dissolved
organic matter in soils subjected to drying, Chemosphere, 38, 45–50,
1999.
Short summary
High-latitude permafrost environments are changing rapidly due impacts and feedbacks associated with climate warming. We used streamflow and DOC concentrations as well as export estimates and optical indices to better understand how different surface water bodies transport and process dissolved material over multiple seasons and years. Information on DOM quality provides insight into organic material sources and possible composition changes related to higher summer rainfall in summer/fall.
High-latitude permafrost environments are changing rapidly due impacts and feedbacks associated...