Articles | Volume 15, issue 11
https://doi.org/10.5194/tc-15-5151-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-15-5151-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| Highlight paper
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19 Nov 2021
Research article | Highlight paper |
| 19 Nov 2021
| 19 Nov 2021
Accumulation of legacy fallout radionuclides in cryoconite on Isfallsglaciären (Arctic Sweden) and their downstream spatial distribution
Caroline C. Clason
CORRESPONDING AUTHOR
School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth, PL4 8AA, UK
Will H. Blake
School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth, PL4 8AA, UK
Nick Selmes
Plymouth Marine Laboratory, Plymouth, PL1 3DH, UK
Alex Taylor
School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth, PL4 8AA, UK
Pascal Boeckx
Isotope Bioscience Laboratory – ISOFYS, Ghent University, Ghent,
Belgium
Jessica Kitch
School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth, PL4 8AA, UK
Stephanie C. Mills
School of Earth, Atmospheric and Life Sciences, University of
Wollongong, Wollongong, NSW 2522, Australia
Giovanni Baccolo
Department of Environmental and Earth Sciences, University
of Milano-Bicocca, Milan, Italy
Geoffrey E. Millward
School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth, PL4 8AA, UK
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Niccolò Maffezzoli, Eliza Cook, Willem G. M. van der Bilt, Eivind N. Støren, Daniela Festi, Florian Muthreich, Alistair W. R. Seddon, François Burgay, Giovanni Baccolo, Amalie R. F. Mygind, Troels Petersen, Andrea Spolaor, Sebastiano Vascon, Marcello Pelillo, Patrizia Ferretti, Rafael S. dos Reis, Jefferson C. Simões, Yuval Ronen, Barbara Delmonte, Marco Viccaro, Jørgen Peder Steffensen, Dorthe Dahl-Jensen, Kerim H. Nisancioglu, and Carlo Barbante
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Multiple lines of research in ice core science are limited by manually intensive and time-consuming optical microscopy investigations for the detection of insoluble particles, from pollen grains to volcanic shards. To help overcome these limitations and support researchers, we present a novel methodology for the identification and autonomous classification of ice core insoluble particles based on flow image microscopy and neural networks.
Flossie Brown, Gerd A. Folberth, Stephen Sitch, Susanne Bauer, Marijn Bauters, Pascal Boeckx, Alexander W. Cheesman, Makoto Deushi, Inês Dos Santos Vieira, Corinne Galy-Lacaux, James Haywood, James Keeble, Lina M. Mercado, Fiona M. O'Connor, Naga Oshima, Kostas Tsigaridis, and Hans Verbeeck
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Surface ozone can decrease plant productivity and impair human health. In this study, we evaluate the change in surface ozone due to climate change over South America and Africa using Earth system models. We find that if the climate were to change according to the worst-case scenario used here, models predict that forested areas in biomass burning locations and urban populations will be at increasing risk of ozone exposure, but other areas will experience a climate benefit.
Laura Summerauer, Philipp Baumann, Leonardo Ramirez-Lopez, Matti Barthel, Marijn Bauters, Benjamin Bukombe, Mario Reichenbach, Pascal Boeckx, Elizabeth Kearsley, Kristof Van Oost, Bernard Vanlauwe, Dieudonné Chiragaga, Aimé Bisimwa Heri-Kazi, Pieter Moonen, Andrew Sila, Keith Shepherd, Basile Bazirake Mujinya, Eric Van Ranst, Geert Baert, Sebastian Doetterl, and Johan Six
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We present a soil mid-infrared library with over 1800 samples from central Africa in order to facilitate soil analyses of this highly understudied yet critical area. Together with an existing continental library, we demonstrate a regional analysis and geographical extrapolation to predict total carbon and nitrogen. Our results show accurate predictions and highlight the value that the data contribute to existing libraries. Our library is openly available for public use and for expansion.
Giovanni Baccolo, Barbara Delmonte, Elena Di Stefano, Giannantonio Cibin, Ilaria Crotti, Massimo Frezzotti, Dariush Hampai, Yoshinori Iizuka, Augusto Marcelli, and Valter Maggi
The Cryosphere, 15, 4807–4822, https://doi.org/10.5194/tc-15-4807-2021, https://doi.org/10.5194/tc-15-4807-2021, 2021
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As scientists are pushing efforts to recover deep ice cores to extend paleoclimatic reconstructions, it is now essential to explore deep ice. The latter was considered a relatively stable environment, but this view is changing. This study shows that the conditions of deep ice promote the interaction between soluble and insoluble impurities, favoring complex geochemical reactions that lead to the englacial dissolution and precipitation of specific minerals present in atmospheric mineral dust.
Heleen Deroo, Masuda Akter, Samuel Bodé, Orly Mendoza, Haichao Li, Pascal Boeckx, and Steven Sleutel
Biogeosciences, 18, 5035–5051, https://doi.org/10.5194/bg-18-5035-2021, https://doi.org/10.5194/bg-18-5035-2021, 2021
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We assessed if and how incorporation of exogenous organic carbon (OC) such as straw could affect decomposition of native soil organic carbon (SOC) under different irrigation regimes. Addition of exogenous OC promoted dissolution of native SOC, partly because of increased Fe reduction, leading to more net release of Fe-bound SOC. Yet, there was no proportionate priming of SOC-derived DOC mineralisation. Water-saving irrigation can retard both priming of SOC dissolution and mineralisation.
Sebastian Doetterl, Rodrigue K. Asifiwe, Geert Baert, Fernando Bamba, Marijn Bauters, Pascal Boeckx, Benjamin Bukombe, Georg Cadisch, Matthew Cooper, Landry N. Cizungu, Alison Hoyt, Clovis Kabaseke, Karsten Kalbitz, Laurent Kidinda, Annina Maier, Moritz Mainka, Julia Mayrock, Daniel Muhindo, Basile B. Mujinya, Serge M. Mukotanyi, Leon Nabahungu, Mario Reichenbach, Boris Rewald, Johan Six, Anna Stegmann, Laura Summerauer, Robin Unseld, Bernard Vanlauwe, Kristof Van Oost, Kris Verheyen, Cordula Vogel, Florian Wilken, and Peter Fiener
Earth Syst. Sci. Data, 13, 4133–4153, https://doi.org/10.5194/essd-13-4133-2021, https://doi.org/10.5194/essd-13-4133-2021, 2021
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The African Tropics are hotspots of modern-day land use change and are of great relevance for the global carbon cycle. Here, we present data collected as part of the DFG-funded project TropSOC along topographic, land use, and geochemical gradients in the eastern Congo Basin and the Albertine Rift. Our database contains spatial and temporal data on soil, vegetation, environmental properties, and land management collected from 136 pristine tropical forest and cropland plots between 2017 and 2020.
Simon Baumgartner, Marijn Bauters, Matti Barthel, Travis W. Drake, Landry C. Ntaboba, Basile M. Bazirake, Johan Six, Pascal Boeckx, and Kristof Van Oost
SOIL, 7, 83–94, https://doi.org/10.5194/soil-7-83-2021, https://doi.org/10.5194/soil-7-83-2021, 2021
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We compared stable isotope signatures of soil profiles in different forest ecosystems within the Congo Basin to assess ecosystem-level differences in N cycling, and we examined the local effect of topography on the isotopic signature of soil N. Soil δ15N profiles indicated that the N cycling in in the montane forest is more closed, whereas the lowland forest and Miombo woodland experienced a more open N cycle. Topography only alters soil δ15N values in forests with high erosional forces.
Filipe G. L. Lindau, Jefferson C. Simões, Barbara Delmonte, Patrick Ginot, Giovanni Baccolo, Chiara I. Paleari, Elena Di Stefano, Elena Korotkikh, Douglas S. Introne, Valter Maggi, Eduardo Garzanti, and Sergio Andò
The Cryosphere, 15, 1383–1397, https://doi.org/10.5194/tc-15-1383-2021, https://doi.org/10.5194/tc-15-1383-2021, 2021
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Information about the past climate variability in tropical South America is stored in the snow layers of the tropical Andean glaciers. Here we show evidence that the presence of very large aeolian mineral dust particles at Nevado Illimani (Bolivia) is strictly controlled by the occurrence of summer storms in the Bolivian Altiplano. Therefore, based on the snow dust content and its composition of stable water isotopes, we propose a new proxy for information on previous summer storms.
Paula Alejandra Lamprea Pineda, Marijn Bauters, Hans Verbeeck, Selene Baez, Matti Barthel, Samuel Bodé, and Pascal Boeckx
Biogeosciences, 18, 413–421, https://doi.org/10.5194/bg-18-413-2021, https://doi.org/10.5194/bg-18-413-2021, 2021
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Tropical forest soils are an important source and sink of greenhouse gases (GHGs) with tropical montane forests having been poorly studied. In this pilot study, we explored soil fluxes of CO2, CH4, and N2O in an Ecuadorian neotropical montane forest, where a net consumption of N2O at higher altitudes was observed. Our results highlight the importance of short-term variations in N2O and provide arguments and insights for future, more detailed studies on GHG fluxes from montane forest soils.
Simon Baumgartner, Matti Barthel, Travis William Drake, Marijn Bauters, Isaac Ahanamungu Makelele, John Kalume Mugula, Laura Summerauer, Nora Gallarotti, Landry Cizungu Ntaboba, Kristof Van Oost, Pascal Boeckx, Sebastian Doetterl, Roland Anton Werner, and Johan Six
Biogeosciences, 17, 6207–6218, https://doi.org/10.5194/bg-17-6207-2020, https://doi.org/10.5194/bg-17-6207-2020, 2020
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Soil respiration is an important carbon flux and key process determining the net ecosystem production of terrestrial ecosystems. The Congo Basin lacks studies quantifying carbon fluxes. We measured soil CO2 fluxes from different forest types in the Congo Basin and were able to show that, even though soil CO2 fluxes are similarly high in lowland and montane forests, the drivers were different: soil moisture in montane forests and C availability in the lowland forests.
Filipe Gaudie Ley Lindau, Jefferson Cardia Simões, Rafael da Rocha Ribeiro, Patrick Ginot, Barbara Delmonte, Giovanni Baccolo, Stanislav Kutuzov, Valter Maggi, and Edson Ramirez
Clim. Past Discuss., https://doi.org/10.5194/cp-2020-129, https://doi.org/10.5194/cp-2020-129, 2020
Manuscript not accepted for further review
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Glaciers are important freshwater sources in the Tropical Andes. Their retreat has been accelerating since the 1980s. This exposes fresh glacial sediments and facilitates the transport of coarse dust particles to the Nevado Illimani summit. Both the glacial area of Illimani and its ice core record of coarse dust particles respond to warmer conditions across the southern tropical Andes, and drier conditions over the Amazon basin.
Hannes P. T. De Deurwaerder, Marco D. Visser, Matteo Detto, Pascal Boeckx, Félicien Meunier, Kathrin Kuehnhammer, Ruth-Kristina Magh, John D. Marshall, Lixin Wang, Liangju Zhao, and Hans Verbeeck
Biogeosciences, 17, 4853–4870, https://doi.org/10.5194/bg-17-4853-2020, https://doi.org/10.5194/bg-17-4853-2020, 2020
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The depths at which plants take up water is challenging to observe directly. To do so, scientists have relied on measuring the isotopic composition of xylem water as this provides information on the water’s source. Our work shows that this isotopic composition changes throughout the day, which complicates the interpretation of the water’s source and has been currently overlooked. We build a model to help understand the origin of these composition changes and their consequences for science.
Cited articles
Åhman, B. and Åhman, G.: Radiocesium in Swedish reindeer after the
Chernobyl fallout: Seasonal variations and long-term decline, Health Phys.,
66, 503–512, https://doi.org/10.1097/00004032-199405000-00002, 1994.
Åhman, B., Wright, S. M., and Howard, B. J.: Effect of origin of
radiocaesium on the transfer from fallout to reindeer meat, Sci. Total Environ., 278, 171–181, https://doi.org/10.1016/S0048-9697(01)00646-5, 2001.
Aldahan, A., Possnert, G., and Vintersved, I.: Atmospheric interactions at
northern high latitudes from weekly Be-isotopes in surface air, Appl. Radiat. Isot., 54, 345–353, https://doi.org/10.1016/S0969-8043(00)00163-9, 2001.
Appleby, P. G.: Chronostratigraphic Techniques in Recent Sediments, in:
Tracking Environmental Change Using Lake Sediments, Developments in Paleoenvironmental Research, vol. 1, edited by: Smol, J. P. and Last, W. M.,
Springer, Dordrecht, 2002.
Baccolo, G., Di Mauro, B., Massabò, D., Clemenza, M., Nastasi, M.,
Delmonte, B., Prata, M., Prati, P., Previtali, E., and Maggi, V.: Cryoconite
as a temporary sink for anthropogenic species stored in glaciers, Sci. Rep.,
7, 9623, https://doi.org/10.1038/s41598-017-10220-5, 2017.
Baccolo, G., Łokas, E., Gaca, P., Massabò, D., Ambrosini, R., Azzoni,
R.S., Clason, C., Di Mauro, B., Franzetti, A., Nastasi, M., Prata, M., Prati, P., Previtali, E., Delmonte, B., and Maggi, V.: Cryoconite: an efficient accumulator of radioactive fallout in glacial environments, The Cryosphere, 14, 657–672, https://doi.org/10.5194/tc-14-657-2020, 2020a.
Baccolo, G., Nastasi, M., Massabo, D., Clason, C., Di Mauro, B., Di Stefano,
E., Lokas, E., Prati, P., Previtali, E., Takeuchi, N., Delmonte, B., and Maggi, V.: Artificial and natural radionuclides in cryoconite as tracers of
supraglacial dynamics: Insights from the Morteratsch glacier (Swiss Alps),
Catena, 191, 104577, https://doi.org/10.1016/j.catena.2020.104577, 2020b.
Bagshaw, E. A., Tranter, M., Fountain, A. G., Welch, K., Basagic, H. J., and
Lyons, W. B.: Do cryoconite holes have the potential to be significant
sources of C, N, and P to downstream depauperate ecosystems of Taylor Valley, Antarctica?, Arct. Antarct. Alp. Res., 45, 440–457, https://doi.org/10.1657/1938-4246-45.4.440, 2013.
Baird, G. B.: On the Bedrock Geology of the Tarfala Valley: Preliminary Results of 2003 and 2004 Fieldwork, edited by: Jonsson, C., Tarfala Research
Station Annual Report 2003–2004, 04B1, Stockholm University, Stockholm, 2010.
Bizzotto, E. C., Villa, S., Vaj, C., and Vighi, M.: Comparison of glacial and
non-glacial-fed streams to evaluate the loading of persistent organic
pollutants through seasonal snow/ice melt, Chemosphere, 74, 924–930,
https://doi.org/10.1016/j.chemosphere.2008.10.013, 2009.
Bogdal, C., Schmid, P., Zennegg, M., Anselmetti, F. S., Scheringer, M., and
Hungerbühler, K.: Blast from the past: Melting glaciers as a relevant
source for persistent organic pollutants, Environ. Sci. Technol., 43, 8173–8177, https://doi.org/10.1021/es901628x, 2009.
Box, J. E., Fettweis, X., Stroeve, J. C., Tedesco, M., Hall, D. K., and Steffen, K.: Greenland ice sheet albedo feedback: Thermodynamics and
atmospheric drivers, The Cryosphere, 6, 821–839, https://doi.org/10.5194/tc-6-821-2012, 2012.
Buda, J., Łokas, E., Pietryka, M., Richter, D., Magowski, W., Iakovenko,
N. S., Porazinski, D. L., Budzik, T., Grabiec, M., Grzesiak, J., Klimaszyk, P., Gaca, P., and Zawierucha, K.: Biotope and biocenosis of cryoconite hole
ecosystems on Ecology Glacier in the maritime Antarctic, Sci. Total
Environ., 724, 138122, https://doi.org/10.1016/j.scitotenv.2020.138112, 2020.
Bunzl, K., Kracke, W., Schimmack, W., and Auerswald, K.: Migration of fallout
239+240Pu, 241Am and 137Cs in the various horizons of a forest soil under pine, J. Environ. Radioact., 28, 17–34, https://doi.org/10.1016/0265-931X(94)00066-6, 1995.
CCME – Canadian Council of Ministers of the Environment: Canadian sediment
quality guidelines for the protection of aquatic life, CCME EPC-8E, Summary
Tables, Environment Canada, Winnipeg, Canada, 1–5, 1995.
Clason, C: Geochemical analyses of cryoconite and proglacial sediments collected from Isfallsglaciaren, Arctic Sweden, in 2017, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.935336, 2021.
Cook, J., Edwards, A., Takeuchi, N., and Irvine-Fynn, T.: Cryoconite: The
dark biological secret of the cryosphere, Prog. Phys. Geogr., 40, 66–111,
https://doi.org/10.1177/0309133315616574, 2016.
Dahlke, H. and Lyon, S.: Early melt season snowpack isotopic evolution in the Tarfala valley, northern Sweden, Ann. Glaciol., 54, 149–156, https://doi.org/10.3189/2013AoG62A232, 2013.
Duncan, B. N. and Bey, I.: A modeling study of the export pathways of pollution from Europe: Seasonal and interannual variations (1987–1997), J.
Geophys. Res.-Atmos., 109, D0830, https://doi.org/10.1029/2003JD004079, 2004.
Ely, J. C., Graham, C., Barr, I. D., Rea, B. R., Spagnolo, M., and Evans, J.:
Using UAV acquired photography and structure from motion techniques for
studying glacier landforms: application to the glacial flutes at Isfallsglaciären, Earth Surf. Proc. Land., 42, 877–888,
https://doi.org/10.1002/esp.4044, 2017.
Feely, H. W., Larsen, R. J., and Sanderson, C. G.: Factors that cause seasonal variations in Beryllium-7 concentrations in surface air, J. Environ. Radioact., 9, 223–249, https://doi.org/10.1016/0265-931X(89)90046-5, 1989.
Franz, T. P. and Eisenreich, S. J.: Snow scavenging of polychlorinated biphenyls and polycyclic aromatic hydrocarbons in Minnesota, Environ. Sci.
Technol., 32, 1771–1778, https://doi.org/10.1021/es970601z, 1998.
Gäggeler, H. W., Tobler, L., Schwikowski, M., and Jenk, T. M.: Application of the radionuclide 210Pb in glaciology – an overview, J. Glaciol., 66, 447–456, https://doi.org/10.1017/jog.2020.19, 2020.
Grannas, A. M., Bogdal, C., Hageman, K. J., Halsall, C., Harner, T., Hung, H., Kallenborn, R., Klán, P., Klánová, J., MacDonald, R. W., Meyer, T., and Wania, F.: The role of the global cryosphere in the fate of
organic contaminants, Atmos. Chem. Phys., 13, 3271–3305,
https://doi.org/10.5194/acp-13-3271-2013, 2013.
Harrison, J. D., Naylor, G. P. L., and Stather, J. W.: The gastrointestinal
absorption of plutonium and americium in rats and guinea pigs after ingestion of dusts from the former nuclear weapons site at Maralinga: implications for human exposure, Sci. Total Environ., 143, 211–220,
https://doi.org/10.1016/0048-9697(94)90458-8, 1994.
Heinrich, G.: Uptake and transfer factors of 137Cs by mushrooms,
Radiat. Environ. Biophys., 31, 39–49, https://doi.org/10.1007/BF01211511, 1992.
Herbert, B. M. J., Villa, S., and Halsall, C. J.: Chemical interactions with
snow: Understanding the behavior and fate of semi-volatile organic compounds
in snow, Ecotoxicology and Environmental Safety, 63, 3–16, 2006.
Karlén, W.: Holocene Glacier and Climatic Variations, Kebnekaise Mountains, Swedish Lapland, Geogr. Ann. A, 55, 29–63,
https://doi.org/10.1080/04353676.1973.11879879, 1973.
Keegan, K. M., Albert, M. R., McConnell, J. R., and Baker, I.: Climate change
and forest fires synergistically drive widespread melt events of the Greenland Ice Sheet, Proc. Natl. Acad. Sci. USA, 111, 7964–7967,
https://doi.org/10.1073/pnas.1405397111, 2014.
Kirchner, G. and Daillant, O.: The potential of lichens as long-term biomonitors of natural and artificial radionuclides, Environ. Pollut., 120, 145–150, 2002.
Kovacheva, P., Todorov, B., and Djingova, R.: Geochemical fractionation and
bioavailability of 241Am, 60Co and 137Cs in fluvisol soil after sharp temperature variation before the growing season, Cent. Eur. Geol., 57, 153–163, https://doi.org/10.1556/CEuGeol.57.2014.2.3, 2014.
Kristersson, M., Ankarberg, E. H., Rosengren, Å., Lantz, C., and
Fogelberg, C. L.: Cesium-137 i livsmedel, Livsmedelsverket
riskhanteringsrapport 19, part 1, available at: https://www.livsmedelsverket.se/globalassets/publikationsdatabas/rapporter/2017/2017-nr-19-del-1-cesium-i-livsmedel-riskhanteringsrapport.pdf (last access: 17 November 2021), 2017.
Kulan, A., Aldahan, A., Possnert, G., and Vintersved, I.: Distribution of
7Be in surface air of Europe, Atmos. Environ., 40, 3855–3868,
https://doi.org/10.1016/j.atmosenv.2006.02.030, 2006.
Li, Z., Liang, D., Peng, Q., Cui, Z., Huang, J., and Lin, Z.: Interaction
between selenium and soil organic matter and its impact on soil selenium
bioavailability: A review, Geoderma, 295, 69–79,
https://doi.org/10.1016/j.geoderma.2017.02.019, 2017.
Lindblom, G.: Fallout gamma-emitting radionuclides in air, precipitation,
and the human body up to spring 1967, Tellus, 21, 127–135,
https://doi.org/10.3402/tellusa.v21i1.10063, 1969.
Łokas, E., Bartmiński, P., Wachniew, P., Mietelski, J. W., Kawiak, T.,
and Środoń, J.: Sources and pathways of artificial radionuclides to
soils at a High Arctic site, Environ. Sci. Pollut. Res., 21, 12479–12493, https://doi.org/10.1007/s11356-014-3163-6, 2014.
Łokas, E., Zaborska, A., Kolicka, M., Różycki, M., and Zawierucha,
K.: Accumulation of atmospheric radionuclides and heavy metals in cryoconite
holes on an Arctic glacier, Chemosphere, 160, 162–172,
https://doi.org/10.1016/j.chemosphere.2016.06.051, 2016.
Łokas, E., Wachniew, P., Jodłowski, P., and Gąsiorek, M.: Airborne
radionuclides in the proglacial environment as indicators of sources and
transfers of soil material, J. Environ. Radioact., 178, 193–202,
https://doi.org/10.1016/j.jenvrad.2017.08.018, 2017.
Łokas, E., Zawierucha, K., Cwanek, A., Szufa, K., Gaca, P., Mietelski, J.
W., and Tomankiewicz, E.: The sources of high airborne radioactivity in
cryoconite holes from the Caucasus (Georgia), Sci. Rep., 8, 10802, https://doi.org/10.1038/s41598-018-29076-4, 2018.
Łokas, E., Zaborska, A., Sobota, I., Gaca, P., Milton, J. A., Kocurek, P.,
and Cwanek, A: Airborne radionuclides and heavy metals in high Arctic
terrestrial environment as the indicators of sources and transfers of
contamination, The Cryosphere, 13, 2075–2086, https://doi.org/10.5194/tc-13-2075-2019,
2019.
Macdonald, C. R., Elkin, B. T., and Tracy, B. L.: Radiocesium in caribou and
reindeer in northern Canada, Alaska and Greenland from 1958 to 2000, J.
Environ. Radioact., 93, 1–25, https://doi.org/10.1016/j.jenvrad.2006.11.003, 2007.
Macdonald, R. W., Harner, T., and Fyfe, J.: Recent climate change in the Arctic and its impact on contaminant pathways and interpretation of temporal
trend data, Sci. Total Environ., 342, 5–86, https://doi.org/10.1016/j.scitotenv.2004.12.059, 2005.
Malvern: A basic guide to particle characterization, Malvern Instruments
Limited, Worcestershire, UK, 24 pp., 2015.
Miner, K. R., Campbell, S., Gerbi, C., Liljedahl, A., Anderson, T., Perkins,
L. B., Bernsen, S., Gatesman, T., and Kreutz, K. J.: Organochlorine pollutants within a polythermal glacier in the interior Eastern Alaska Range, Water, 10, 1157, https://doi.org/10.3390/w10091157, 2018.
Olszewski, G., Andersson, P., Lindahl, P., and Eriksson, M.: On the distribution and inventories of radionuclides in dated sediments around the
Swedish coast, J. Environ. Radioact., 186, 142–151,
https://doi.org/10.1016/j.jenvrad.2017.09.025, 2018.
Owens, P. N., Blake, W. H., and Millward, G. E.: Extreme levels of fallout
radionuclides and other contaminants in glacial sediment (cryoconite) and
implications for downstream aquatic ecosystems, Sci. Rep., 9, 12531, https://doi.org/10.1038/s41598-019-48873-z, 2019.
Paatero, J., Jaakkola, T., and Kulmala, S.: Lichen (sp. Cladonia) as a
deposition indicator for transuranium elements investigated with the Chernobyl fallout, J. Environ. Radioact., 38, 223–247, https://doi.org/10.1016/S0265-931X(97)00024-6, 1998.
Ryken, N., Al-Barri, B., Taylor, A., Blake, W., Maenhout, P., Sleutel, S., Tack, F. M. G., Dierick, M., Bodé, S., Boeckx, P., and Verdoodt, A.:
Quantifying the spatial variation of 7Be depth distributions towards improved erosion rate estimations, Geoderma, 269, 10–18,
https://doi.org/10.1016/j.geoderma.2016.01.032, 2016.
Skuterud, L., Pedersen, Ø., Staaland, H., Røed, K. H., Salbu, B.,
Liken, A., and Hove, K.: Absorption, retention and tissue distribution of
radiocaesium in reindeer: effects of diet and radiocaesium source, Radiat.
Environ. Biophys., 43, 293–301, https://doi.org/10.1007/s00411-004-0257-4, 2004.
Skuterud, L., Ytre-Eide, M. A., Hevrøy, T. H., and Thørring, H.:
Caesium-137 in Norwegian reindeer and Sámi herders – 50 years of
studies, in: II International Conference on Radioecological Concentration
Processes: II International Conference 50 years later, Seville, Spain, p. 752, 2016.
Smith, H. G., Blake, W. H., and Taylor, A.: Modelling particle residence times in agricultural river basins using a sediment budget model and fallout
radionuclide tracers, Earth Surf. Proc. Land., 39, 1944–1959,
https://doi.org/10.1002/esp.3589, 2014.
Steinlin, C., Bogdal, C., Pavlova, P. A., Schwikowski, M., Lüthi, M. P.,
Scheringer, M., Schmid, P., and Hungerbühler, K.: Polychlorinated Biphenyls in a Temperate Alpine Glacier: 2. Model Results of Chemical Fate
Processes, Environ. Sci. Technol., 49, 14092–14100, https://doi.org/10.1021/acs.est.5b03304, 2015.
Steinnes, E. and Njåstad, O.: Use of mosses and lichens for regional
mapping of 137Cs fallout from the Chernobyl accident, J. Environ. Radioact., 21, 65–73, https://doi.org/10.1016/0265-931X(93)90026-4, 1993.
Stohl, A.: Characteristics of atmospheric transport into the Arctic troposphere, J. Geophys. Res.-Atmos., 111, D1130, https://doi.org/10.1029/2005JD006888, 2006.
Strålsäkerhetsmyndigheten: Cesium-137 i vildsvinskött, available
at:
https://www.stralsakerhetsmyndigheten.se/omraden/miljoovervakning/radioaktiva-amnen/kostnadsfri-matning-av-cesium-137-i-vildsvinskott/,
last access: 29 May 2020.
Sumerling, T. J.: The use of mosses as indicators of airborne radionuclides
near a major nuclear installation, Sci. Total Environ., 35, 251–265,
https://doi.org/10.1016/0048-9697(84)90007-X, 1984.
Takeuchi, N., Kohshima, S., and Seko, K.: Structure, formation, and darkening
process of albedo-reducing material (cryoconite) on a Himalayan glacier: A
granular algal mat growing on the glacier, Arct. Antarct. Alp. Res., 33, 115–122, https://doi.org/10.2307/1552211, 2001.
Taylor, A., Blake, W. H., Couldrick, L., and Keith-Roach, M. J.: Sorption
behaviour of beryllium-7 and implications for its use as a sediment tracer,
Geoderma, 187–188, 16–23, https://doi.org/10.1016/j.geoderma.2012.04.013, 2012.
Taylor, A., Keith-Roach, M. J., Iurian, A. R., Mabit, L., and Blake, W. H.:
Temporal variability of beryllium-7 fallout in southwest UK, J. Environ.
Radioact., 160, 80–86, https://doi.org/10.1016/j.jenvrad.2016.04.025, 2016.
Taylor, A., Blake, W. H., Iurian, A. R., Millward, G. E., and Mabit, L.: The
use of Be-7 as a soil and sediment tracer, in: Assessing Recent Soil Erosion
Rates through the Use of Beryllium-7 (Be-7), edited by: Mabit, W. H. and
Blake, L., Springer Nature, Switzerland, 1–12, 2019.
Tedstone, A. J., Bamber, J. L., Cook, J. M., Williamson, C. J., Fettweis, X., Hodson, A. J., and Tranter, M.: Dark ice dynamics of the south-west Greenland Ice Sheet, The Cryosphere, 11, 2491–2506, https://doi.org/10.5194/tc-11-2491-2017, 2017.
Terzi, L., Wotawa, G., Schoeppner, M., Kalinowski, M., Saey, P. R. J., Steinmann, P., Luan, L., and Staten, P. W.: Radioisotopes demonstrate changes
in global atmospheric circulation possibly caused by global warming, Sci. Rep., 10, 10695, https://doi.org/10.1038/s41598-020-66541-5, 2020.
Tieber, A., Lettner, H., Bossew, P., Hubmer, A., Sattler, B., and Hofmann, W.: Accumulation of anthropogenic radionuclides in cryoconites on Alpine
glaciers, J. Environ. Radioact., 100, 590–598, https://doi.org/10.1016/j.jenvrad.2009.04.008, 2009.
Van Oostdam, J., Gilman, A., Dewailly, E., Usher, P., Wheatley, B., Kuhnlein, H., Neve, S., Walker, J., Tracy, B., Feeley, M., and Kwavnick, B.: Human health implications of environmental contaminants in Arctic Canada: a review, Sci. Total Environ., 230, 1–82, https://doi.org/10.1016/S0048-9697(99)00036-4, 1999.
Vorkamp, K. and Rigét, F. F.: A review of new and current-use contaminants in the Arctic environment: Evidence of long-range transport and
indications of bioaccumulation, Chemosphere, 111, 379–395,
https://doi.org/10.1016/j.chemosphere.2014.04.019, 2014.
Wania, F. and Mackay, D.: A global distribution model for persistent organic
chemicals, Sci. Total Environ., 160–161, 211–232,
https://doi.org/10.1016/0048-9697(95)04358-8, 1995.
Wedepohl, K., H.: The composition of the continental crust, Geochim. Cosmochim. Ac., 59, 1217–1232, https://doi.org/10.1016/0016-7037(95)00038-2, 1995.
Weiland-Bräuer, N., Fischer, M. A., Schramm, K. W., and Schmitz, R. A.:
Polychlorinated biphenyl (PCB)-degrading potential of microbes present in a
cryoconite of Jamtalferner glacier, Front. Microbiol., 8, 1105,
https://doi.org/10.3389/fmicb.2017.01105, 2017.
Wilflinger, T., Lettner, H., Hubmer, A., Bossew, P., Sattler, B., and
Slupetzky, H.: Cryoconites from Alpine glaciers: Radionuclide accumulation
and age estimation with Pu and Cs isotopes and 210Pb, J. Environ.
Radioact., 186, 90–100, https://doi.org/10.1016/j.jenvrad.2017.06.020, 2018.
Wynants, M., Millward, G., Patrick, A., Taylor, A., Munishi, L., Mtei, K.,
Brendonck, L., Gilvear, D., Boeckx, P., Ndakidemi, P., and Blake, W. H.:
Determining tributary sources of increased sedimentation in East-African
Rift Lakes, Sci. Total Environ., 717, 137266, https://doi.org/10.1016/j.scitotenv.2020.137266, 2020.
Zawierucha, K., Buda, J., Fontaneto, D., Ambrosini, R., Franzetti, A.,
Wierzgoń, M., and Bogdziewicz, M.: Fine-scale spatial heterogeneity of
invertebrates within cryoconite holes, Aquat. Ecol., 53, 179–190,
https://doi.org/10.1007/s10452-019-09681-9, 2019.
Short summary
Our paper presents results of sample collection and subsequent geochemical analyses from the glaciated Isfallsglaciären catchment in Arctic Sweden. The data suggest that material found on the surface of glaciers,
cryoconite, is very efficient at accumulating products of nuclear fallout transported in the atmosphere following events such as the Chernobyl disaster. We investigate how this compares with samples in the downstream environment and consider potential environmental implications.
Our paper presents results of sample collection and subsequent geochemical analyses from the...
