Articles | Volume 10, issue 5
https://doi.org/10.5194/tc-10-2173-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/tc-10-2173-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
21 Sep 2016
Research article |
| 21 Sep 2016
Estimates of ikaite export from sea ice to the underlying seawater in a sea ice–seawater mesocosm
Nicolas-Xavier Geilfus
CORRESPONDING AUTHOR
Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada
Arctic Research Centre, Aarhus University, Aarhus, Denmark
Ryan J. Galley
Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada
Brent G. T. Else
Department of Geography, University of Calgary, Calgary, Canada
Karley Campbell
Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada
Tim Papakyriakou
Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada
Odile Crabeck
Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada
Marcos Lemes
Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada
Bruno Delille
Unité d'Océanographie Chimique, Université de Liège,
Liège, Belgium
Søren Rysgaard
Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada
Arctic Research Centre, Aarhus University, Aarhus, Denmark
Greenland Climate Research Centre, Greenland Institute of Natural
Resources, Nuuk, Greenland
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Heather Kyle, Søren Rysgaard, Feiyue Wang, and Mostafa Fayek
The Cryosphere Discuss., https://doi.org/10.5194/tc-2017-226, https://doi.org/10.5194/tc-2017-226, 2017
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Sergei Kirillov, Igor Dmitrenko, Søren Rysgaard, David Babb, Leif Toudal Pedersen, Jens Ehn, Jørgen Bendtsen, and David Barber
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Goulven G. Laruelle, Peter Landschützer, Nicolas Gruber, Jean-Louis Tison, Bruno Delille, and Pierre Regnier
Biogeosciences, 14, 4545–4561, https://doi.org/10.5194/bg-14-4545-2017, https://doi.org/10.5194/bg-14-4545-2017, 2017
Odile Crabeck, Ryan Galley, Bruno Delille, Brent Else, Nicolas-Xavier Geilfus, Marcos Lemes, Mathieu Des Roches, Pierre Francus, Jean-Louis Tison, and Søren Rysgaard
The Cryosphere, 10, 1125–1145, https://doi.org/10.5194/tc-10-1125-2016, https://doi.org/10.5194/tc-10-1125-2016, 2016
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We present a new non-destructive X-ray-computed tomography technique to quantify the air volume fraction and produce separate 3-D images of air-volume inclusions in sea ice. While the internal layers showed air-volume fractions < 2 %, the ice–air interface (top 2 cm) showed values up to 5 %. As a result of the presence of large bubbles and higher air volume fraction measurements in sea ice, we introduce new perspectives on processes regulating gas exchange at the ice–atmosphere interface.
N.-X. Geilfus, R. J. Galley, O. Crabeck, T. Papakyriakou, J. Landy, J.-L. Tison, and S. Rysgaard
Biogeosciences, 12, 2047–2061, https://doi.org/10.5194/bg-12-2047-2015, https://doi.org/10.5194/bg-12-2047-2015, 2015
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We investigated the evolution of inorganic carbon within landfast sea ice in Resolute Passage during the spring and summer melt period.
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N.-X. Geilfus, J.-L. Tison, S. F. Ackley, R. J. Galley, S. Rysgaard, L. A. Miller, and B. Delille
The Cryosphere, 8, 2395–2407, https://doi.org/10.5194/tc-8-2395-2014, https://doi.org/10.5194/tc-8-2395-2014, 2014
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O. Crabeck, B. Delille, D. Thomas, N.-X. Geilfus, S. Rysgaard, and J.-L. Tison
Biogeosciences, 11, 6525–6538, https://doi.org/10.5194/bg-11-6525-2014, https://doi.org/10.5194/bg-11-6525-2014, 2014
J. Zhou, B. Delille, F. Brabant, and J.-L. Tison
Biogeosciences, 11, 5007–5020, https://doi.org/10.5194/bg-11-5007-2014, https://doi.org/10.5194/bg-11-5007-2014, 2014
S. Rysgaard, F. Wang, R. J. Galley, R. Grimm, D. Notz, M. Lemes, N.-X. Geilfus, A. Chaulk, A. A. Hare, O. Crabeck, B. G. T. Else, K. Campbell, L. L. Sørensen, J. Sievers, and T. Papakyriakou
The Cryosphere, 8, 1469–1478, https://doi.org/10.5194/tc-8-1469-2014, https://doi.org/10.5194/tc-8-1469-2014, 2014
J. Zhou, J.-L. Tison, G. Carnat, N.-X. Geilfus, and B. Delille
The Cryosphere, 8, 1019–1029, https://doi.org/10.5194/tc-8-1019-2014, https://doi.org/10.5194/tc-8-1019-2014, 2014
F. Wang, A. Saiz-Lopez, A. S. Mahajan, J. C. Gómez Martín, D. Armstrong, M. Lemes, T. Hay, and C. Prados-Roman
Atmos. Chem. Phys., 14, 1323–1335, https://doi.org/10.5194/acp-14-1323-2014, https://doi.org/10.5194/acp-14-1323-2014, 2014
M. Vancoppenolle, D. Notz, F. Vivier, J. Tison, B. Delille, G. Carnat, J. Zhou, F. Jardon, P. Griewank, A. Lourenço, and T. Haskell
The Cryosphere Discuss., https://doi.org/10.5194/tcd-7-3209-2013, https://doi.org/10.5194/tcd-7-3209-2013, 2013
Revised manuscript not accepted
Related subject area
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Responses of dissolved organic carbon to freeze–thaw cycles associated with the changes in microbial activity and soil structure
Biogeochemical evolution of ponded meltwater in a High Arctic subglacial tunnel
Variation in bacterial composition, diversity, and activity across different subglacial basal ice types
Variability in sea ice carbonate chemistry: a case study comparing the importance of ikaite precipitation, bottom-ice algae, and currents across an invisible polynya
Molecular biomarkers in Batagay megaslump permafrost deposits reveal clear differences in organic matter preservation between glacial and interglacial periods
High nitrate variability on an Alaskan permafrost hillslope dominated by alder shrubs
Improved ELMv1-ECA simulations of zero-curtain periods and cold-season CH4 and CO2 emissions at Alaskan Arctic tundra sites
Methane cycling within sea ice: results from drifting ice during late spring, north of Svalbard
Heterogeneous CO2 and CH4 content of glacial meltwater from the Greenland Ice Sheet and implications for subglacial carbon processes
The role of vadose zone physics in the ecohydrological response of a Tibetan meadow to freeze–thaw cycles
Permafrost thawing exhibits a greater influence on bacterial richness and community structure than permafrost age in Arctic permafrost soils
Physically based model of the contribution of red snow algal cells to temporal changes in albedo in northwest Greenland
Large carbon cycle sensitivities to climate across a permafrost thaw gradient in subarctic Sweden
Microbial processes in the weathering crust aquifer of a temperate glacier
Carbonaceous material export from Siberian permafrost tracked across the Arctic Shelf using Raman spectroscopy
Consumption of atmospheric methane by the Qinghai–Tibet Plateau alpine steppe ecosystem
Landform partitioning and estimates of deep storage of soil organic matter in Zackenberg, Greenland
Impact of icebergs on net primary productivity in the Southern Ocean
Macromolecular composition of terrestrial and marine organic matter in sediments across the East Siberian Arctic Shelf
Thermokarst lake waters across the permafrost zones of western Siberia
Liam Heffernan, Dolly N. Kothawala, and Lars J. Tranvik
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The northern permafrost region stores half the world's soil carbon. As the region warms, permafrost thaws and releases dissolved organic carbon, which leads to decomposition of this carbon pool or export into aquatic ecosystems. In this study we developed a new database of 2276 dissolved organic carbon concentrations in eight different ecosystems from 111 studies published over 22 years. This study highlights that coastal areas may play an important role in future high-latitude carbon cycling.
Nathan Alec Conroy, Jeffrey M. Heikoop, Emma Lathrop, Dea Musa, Brent D. Newman, Chonggang Xu, Rachael E. McCaully, Carli A. Arendt, Verity G. Salmon, Amy Breen, Vladimir Romanovsky, Katrina E. Bennett, Cathy J. Wilson, and Stan D. Wullschleger
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This study combines field observations, non-parametric statistical analyses, and thermodynamic modeling to characterize the environmental causes of the spatial variability in soil pore water solute concentrations across two Arctic catchments with varying extents of permafrost. Vegetation type, soil moisture and redox conditions, weathering and hydrologic transport, and mineral solubility were all found to be the primary drivers of the existing spatial variability of some soil pore water solutes.
You Jin Kim, Jinhyun Kim, and Ji Young Jung
The Cryosphere, 17, 3101–3114, https://doi.org/10.5194/tc-17-3101-2023, https://doi.org/10.5194/tc-17-3101-2023, 2023
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This study demonstrated the response of organic soils in the Arctic tundra to freeze–thaw cycles (FTCs), focusing on the quantitative and qualitative characteristics of dissolved organic carbon (DOC). The highlights found in this study are as follows: (i) FTCs altered DOC properties without decreasing soil microbial activities, and (ii) soil aggregate distribution influenced by FTCs changed DOC characteristics by enhancing microbial activities and altering specific-sized soil pore proportion.
Ashley J. Dubnick, Rachel L. Spietz, Brad D. Danielson, Mark L. Skidmore, Eric S. Boyd, Dave Burgess, Charvanaa Dhoonmoon, and Martin Sharp
The Cryosphere, 17, 2993–3012, https://doi.org/10.5194/tc-17-2993-2023, https://doi.org/10.5194/tc-17-2993-2023, 2023
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At the end of an Arctic winter, we found ponded water 500 m under a glacier. We explored the chemistry and microbiology of this unique, dark, and cold aquatic habitat to better understand ecology beneath glaciers. The water was occupied by cold-loving and cold-tolerant microbes with versatile metabolisms and broad habitat ranges and was depleted in compounds commonly used by microbes. These results show that microbes can become established beneath glaciers and deplete nutrients within months.
Shawn M. Doyle and Brent C. Christner
The Cryosphere, 16, 4033–4051, https://doi.org/10.5194/tc-16-4033-2022, https://doi.org/10.5194/tc-16-4033-2022, 2022
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Here we examine the diversity and activity of microbes inhabiting different types of basal ice. We combine this with a meta-analysis to provide a broad overview of the specific microbial lineages enriched in a diverse range of frozen environments. Our results indicate debris-rich basal ice horizons harbor microbes that actively conduct biogeochemical cycling at subzero temperatures and reveal similarities between the microbiomes of basal ice and other permanently frozen environments.
Brent G. T. Else, Araleigh Cranch, Richard P. Sims, Samantha Jones, Laura A. Dalman, Christopher J. Mundy, Rebecca A. Segal, Randall K. Scharien, and Tania Guha
The Cryosphere, 16, 3685–3701, https://doi.org/10.5194/tc-16-3685-2022, https://doi.org/10.5194/tc-16-3685-2022, 2022
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Sea ice helps control how much carbon dioxide polar oceans absorb. We compared ice cores from two sites to look for differences in carbon chemistry: one site had thin ice due to strong ocean currents and thick snow; the other site had thick ice, thin snow, and weak currents. We did find some differences in small layers near the top and the bottom of the cores, but for most of the ice volume the chemistry was the same. This result will help build better models of the carbon sink in polar oceans.
Loeka L. Jongejans, Kai Mangelsdorf, Cornelia Karger, Thomas Opel, Sebastian Wetterich, Jérémy Courtin, Hanno Meyer, Alexander I. Kizyakov, Guido Grosse, Andrei G. Shepelev, Igor I. Syromyatnikov, Alexander N. Fedorov, and Jens Strauss
The Cryosphere, 16, 3601–3617, https://doi.org/10.5194/tc-16-3601-2022, https://doi.org/10.5194/tc-16-3601-2022, 2022
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Large parts of Arctic Siberia are underlain by permafrost. Climate warming leads to permafrost thaw. At the Batagay megaslump, permafrost sediments up to ~ 650 kyr old are exposed. We took sediment samples and analysed the organic matter (e.g. plant remains). We found distinct differences in the biomarker distributions between the glacial and interglacial deposits with generally stronger microbial activity during interglacial periods. Further permafrost thaw enhances greenhouse gas emissions.
Rachael E. McCaully, Carli A. Arendt, Brent D. Newman, Verity G. Salmon, Jeffrey M. Heikoop, Cathy J. Wilson, Sanna Sevanto, Nathan A. Wales, George B. Perkins, Oana C. Marina, and Stan D. Wullschleger
The Cryosphere, 16, 1889–1901, https://doi.org/10.5194/tc-16-1889-2022, https://doi.org/10.5194/tc-16-1889-2022, 2022
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Degrading permafrost and shrub expansion are critically important to tundra biogeochemistry. We observed significant variability in soil pore water NO3-N in an alder-dominated permafrost hillslope in Alaska. Proximity to alder shrubs and the presence or absence of topographic gradients and precipitation events strongly influence NO3-N availability and mobility. The highly dynamic nature of labile N on small spatiotemporal scales has implications for nutrient responses to a warming Arctic.
Jing Tao, Qing Zhu, William J. Riley, and Rebecca B. Neumann
The Cryosphere, 15, 5281–5307, https://doi.org/10.5194/tc-15-5281-2021, https://doi.org/10.5194/tc-15-5281-2021, 2021
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We improved the DOE's E3SM land model (ELMv1-ECA) simulations of soil temperature, zero-curtain period durations, cold-season CH4, and CO2 emissions at several Alaskan Arctic tundra sites. We demonstrated that simulated CH4 emissions during zero-curtain periods accounted for more than 50 % of total emissions throughout the entire cold season (Sep to May). We also found that cold-season CO2 emissions largely offset warm-season net uptake currently and showed increasing trends from 1950 to 2017.
Josefa Verdugo, Ellen Damm, and Anna Nikolopoulos
The Cryosphere, 15, 2701–2717, https://doi.org/10.5194/tc-15-2701-2021, https://doi.org/10.5194/tc-15-2701-2021, 2021
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We show that the ice structures determine the fate of methane during the early melt season and that sea ice may act as a sink of methane when methane oxidation occurs in specific layers of thick and complex sea ice. In spring, when ice melt starts, sea ice methane released into the ocean is the favored pathway. We suggest that changes in ice cover are thus likely to change the methane pathways in the Arctic Ocean and sea ice as a potential source of methane supersaturation in surface waters.
Andrea J. Pain, Jonathan B. Martin, Ellen E. Martin, Åsa K. Rennermalm, and Shaily Rahman
The Cryosphere, 15, 1627–1644, https://doi.org/10.5194/tc-15-1627-2021, https://doi.org/10.5194/tc-15-1627-2021, 2021
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The greenhouse gases (GHGs) methane and carbon dioxide can be produced or consumed by geochemical processes under the Greenland Ice Sheet (GrIS). Chemical signatures and concentrations of GHGs in GrIS discharge show that organic matter remineralization produces GHGs in some locations, but mineral weathering dominates and consumes CO2 in other locations. Local processes will therefore determine whether melting of the GrIS is a positive or negative feedback on climate change driven by GHG forcing.
Lianyu Yu, Simone Fatichi, Yijian Zeng, and Zhongbo Su
The Cryosphere, 14, 4653–4673, https://doi.org/10.5194/tc-14-4653-2020, https://doi.org/10.5194/tc-14-4653-2020, 2020
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The role of soil water and heat transfer physics in portraying the function of a cold region ecosystem was investigated. We found that explicitly considering the frozen soil physics and coupled water and heat transfer is important in mimicking soil hydrothermal dynamics. The presence of soil ice can alter the vegetation leaf onset date and deep leakage. Different complexity in representing vadose zone physics does not considerably affect interannual energy, water, and carbon fluxes.
Mukan Ji, Weidong Kong, Chao Liang, Tianqi Zhou, Hongzeng Jia, and Xiaobin Dong
The Cryosphere, 14, 3907–3916, https://doi.org/10.5194/tc-14-3907-2020, https://doi.org/10.5194/tc-14-3907-2020, 2020
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Old permafrost soil usually has more carbohydrates, while younger soil contains more aliphatic carbons, which substantially impacts soil bacterial communities. However, little is known about how permafrost age and thawing drive microbial communities. We found that permafrost thawing significantly increased bacterial richness in young permafrost and changed soil bacterial compositions at all ages. This suggests that thawing results in distinct bacterial species and alters soil carbon degradation.
Yukihiko Onuma, Nozomu Takeuchi, Sota Tanaka, Naoko Nagatsuka, Masashi Niwano, and Teruo Aoki
The Cryosphere, 14, 2087–2101, https://doi.org/10.5194/tc-14-2087-2020, https://doi.org/10.5194/tc-14-2087-2020, 2020
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Surface snow albedo is substantially reduced by organic impurities, such as microbes that live in the snow. We present the temporal changes of surface albedo, snow grain size, and inorganic and organic impurities observed on a snowpack in northwest Greenland during summer and our attempt to reproduce the changes in albedo with a physically based snow albedo model coupled with a snow algae model. To our knowledge, this is the first report proposing such a coupled albedo model in Greenland.
Kuang-Yu Chang, William J. Riley, Patrick M. Crill, Robert F. Grant, Virginia I. Rich, and Scott R. Saleska
The Cryosphere, 13, 647–663, https://doi.org/10.5194/tc-13-647-2019, https://doi.org/10.5194/tc-13-647-2019, 2019
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Permafrost peatlands store large amounts of carbon potentially vulnerable to decomposition under changing climate. We estimated effects of climate forcing biases on carbon cycling at a thawing permafrost peatland in subarctic Sweden. Our results indicate that many climate reanalysis products are cold and wet biased in our study region, leading to erroneous active layer depth and carbon budget estimates. Future studies should recognize the effects of climate forcing uncertainty on carbon cycling.
Brent C. Christner, Heather F. Lavender, Christina L. Davis, Erin E. Oliver, Sarah U. Neuhaus, Krista F. Myers, Birgit Hagedorn, Slawek M. Tulaczyk, Peter T. Doran, and William C. Stone
The Cryosphere, 12, 3653–3669, https://doi.org/10.5194/tc-12-3653-2018, https://doi.org/10.5194/tc-12-3653-2018, 2018
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Solar radiation that penetrates into the glacier heats the ice to produce nutrient-containing meltwater and provides light that fuels an ecosystem within the ice. Our analysis documents a near-surface photic zone in a glacier that functions as a liquid water oasis in the ice over half the annual cycle. Since microbial growth on glacier surfaces reduces the amount of solar radiation reflected, microbial processes at depths below the surface may also darken ice and accelerate meltwater production.
Robert B. Sparkes, Melissa Maher, Jerome Blewett, Ayça Doğrul Selver, Örjan Gustafsson, Igor P. Semiletov, and Bart E. van Dongen
The Cryosphere, 12, 3293–3309, https://doi.org/10.5194/tc-12-3293-2018, https://doi.org/10.5194/tc-12-3293-2018, 2018
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Ongoing climate change in the Siberian Arctic region has the potential to release large amounts of carbon, currently stored in permafrost, to the Arctic Shelf. Degradation can release this to the atmosphere as greenhouse gas. We used Raman spectroscopy to analyse a fraction of this carbon, carbonaceous material, a group that includes coal, lignite and graphite. We were able to trace this carbon from the river mouths and coastal erosion sites across the Arctic shelf for hundreds of kilometres.
Hanbo Yun, Qingbai Wu, Qianlai Zhuang, Anping Chen, Tong Yu, Zhou Lyu, Yuzhong Yang, Huijun Jin, Guojun Liu, Yang Qu, and Licheng Liu
The Cryosphere, 12, 2803–2819, https://doi.org/10.5194/tc-12-2803-2018, https://doi.org/10.5194/tc-12-2803-2018, 2018
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Here we reported the QTP permafrost region was a CH4 sink of −0.86 ± 0.23 g CH4-C m−2 yr−1 over 2012–2016, soil temperature and soil water content were dominant factors controlling CH4 fluxes, and their correlations changed with soil depth due to cryoturbation dynamics. This region was a net CH4 sink in autumn, but a net source in spring, despite both seasons experiencing similar top soil thawing and freezing dynamics.
Juri Palmtag, Stefanie Cable, Hanne H. Christiansen, Gustaf Hugelius, and Peter Kuhry
The Cryosphere, 12, 1735–1744, https://doi.org/10.5194/tc-12-1735-2018, https://doi.org/10.5194/tc-12-1735-2018, 2018
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This study aims to improve the previous soil organic carbon and total nitrogen storage estimates for the Zackenberg area (NE Greenland) that were based on a land cover classification approach, by using geomorphological upscaling. The landform-based approach more correctly constrains the depositional areas in alluvial fans and deltas with high SOC and TN storage. This research emphasises the need to consider geomorphology when assessing SOC pools in mountain permafrost landscapes.
Shuang-Ye Wu and Shugui Hou
The Cryosphere, 11, 707–722, https://doi.org/10.5194/tc-11-707-2017, https://doi.org/10.5194/tc-11-707-2017, 2017
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The primary productivity in the Southern Ocean (SO) is limited by the amount of iron available for biological activities. Recent studies show that icebergs could be a main source of iron to the SO. Based on remote sensing data, our study shows that iceberg presence is associated with elevated levels of ocean productivity, particularly in iron-deficient regions. This impact could serve as a negative feedback to the climate system.
Robert B. Sparkes, Ayça Doğrul Selver, Örjan Gustafsson, Igor P. Semiletov, Negar Haghipour, Lukas Wacker, Timothy I. Eglinton, Helen M. Talbot, and Bart E. van Dongen
The Cryosphere, 10, 2485–2500, https://doi.org/10.5194/tc-10-2485-2016, https://doi.org/10.5194/tc-10-2485-2016, 2016
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The permafrost in eastern Siberia contains large amounts of carbon frozen in soils and sediments. Continuing global warming is thawing the permafrost and releasing carbon to the Arctic Ocean. We used pyrolysis-GCMS, a chemical fingerprinting technique, to study the types of carbon being deposited on the continental shelf. We found large amounts of permafrost-sourced carbon being deposited up to 200 km offshore.
R. M. Manasypov, O. S. Pokrovsky, S. N. Kirpotin, and L. S. Shirokova
The Cryosphere, 8, 1177–1193, https://doi.org/10.5194/tc-8-1177-2014, https://doi.org/10.5194/tc-8-1177-2014, 2014
Cited articles
Bates, N. R. and Mathis, J. T.: The Arctic Ocean marine carbon cycle: evaluation of air-sea CO2 exchanges, ocean acidification impacts and potential feedbacks, Biogeosciences, 6, 2433–2459, https://doi.org/10.5194/bg-6-2433-2009, 2009.
Bates, N. R., Cai, W. J., and Mathis, J. T.: The ocean carbon cycle in the western Arctic Ocean: Distributions and air-sea fluxes of carbon dioxide, Oceanography, 24, 186–201, 2011.
Bates, N. R., Garley, R., Frey, K. E., Shake, K. L., and Mathis, J. T.: Sea-ice melt CO2-carbonate chemistry in the western Arctic Ocean: meltwater contributions to air–sea CO2 gas exchange, mixed-layer properties and rates of net community production under sea ice, Biogeosciences, 11, 6769–6789, https://doi.org/10.5194/bg-11-6769-2014, 2014.
Chierici, M. and Fransson, A.: Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves, Biogeosciences, 6, 2421–2431, https://doi.org/10.5194/bg-6-2421-2009, 2009.
Chierici, M., Fransson, A., Lansard, B., Miller, L. A., Mucci, A., Shadwick, E., Thomas, E., Tremblay, J. E., and Papakyriakou, T.: The impact of biogeochemical processes and environmental factors on the calcium carbonate saturation state in the Circumpolar Flaw Lead in the Amundsen Gulf, Arctic Ocean, J. Geophys. Res., 116, C00G09, https://doi.org/10.1029/2011JC007184, 2011.
Copin-Montégut, C.: A new formula for the effect of temperature on the partial pressure of carbon dioxide in seawater, Mar. Chem., 25, 29–37, 1988.
Cox, G. F. N. and Weeks, W. F.: Equations for determining the gas and brine volumes in sea-ice samples, J. Glaciol., 29, 306–316, 1983.
Delille, B., Vancoppenolle, M., Geilfus, N.-X., Tilbrook, B., Lannuzel, D., Schoemann, V., Becquevort, S., Carnat, G., Delille, D., Lancelot, C., Chou, L., Dieckmann, G. S., and Tison, J.-L.: Southern Ocean CO2 sink: The contribution of the sea ice, J. Geophys. Res.-Oceans, 119, 6340–6355, 2014.
Dieckmann, G. S., Nehrke, G., Papadimitriou, S., Gottlicher, J., Steininger, R., Kennedy, H., Wolf-Gladrow, D., and Thomas, D. N.: Calcium carbonate as ikaite crystals in Antarctic sea ice, Geophys. Res. Lett., 35, L08501, https://doi.org/10.1029/2008GL033540, 2008.
DOE: Handbook of methods for the analysis of the various parameters of the carbon dioxide system in sea water; version 2, edited by: Dickson, A. G. and Goyet, C., ORNL/CDIAC-74, 1994.
Ducklow, H. W.: Seasonal production and bacterial utilization of DOC in the Ross Sea, Antarctica, Biogeochemistry of the Ross Sea, 78, 143–158, 2003.
Else, B. G. T., Papakyriakou, T., Galley, R., Drennan, W. M., Miller, L. A., and Thomas, H.: Wintertime CO2 fluxes in an Arctic polynya using eddy covariance: Evidence for enhanced air-gas transfer during ice formation, J. Geophys. Res., 116, C00G03, https://doi.org/10.1029/2010JC006760, 2011.
Else, B. G. T., Galley, R. J., Lansard, B., Barber, D. G., Brown, K., Miller, L. A., Mucci, A., Papakyriakou, T. N., Tremblay, J. E., and Rysgaard, S.: Further observations of a decreasing atmospheric CO2 uptake capacity in the Canada Basin (Arctic Ocean) due to sea ice loss, Geophys. Res. Lett., 40, 1132–1137, 2013.
Else, B. G. T., Rysgaard, S., Attard, K., Campbell, K., Crabeck, O., Galley, R. J., Geilfus, N. X., Lemes, M., Lueck, R., Papakyriakou, T., and Wang, F.: Under-ice eddy covariance flux measurements of heat, salt, momentum, and dissolved oxygen in an artificial sea ice pool, Cold Reg. Sci. Technol., 119, 158–169, 2015.
Frankignoulle, M.: Field-Measurements of Air Sea CO2 Exchange, Limnol. Oceanogr., 33, 313–322, 1988.
Fransson, A., Chierici, M., Miller L. A., Carnat G., Shadwick, E., Thomas, H., Pineault, S., and Papakyriakou, T. N.: Impact of sea-ice processes on the carbonate system and ocean acidification at the ice-water interface of the Amundsen Gulf, Arctic Ocean, J. Geophys. Res.-Oceans, 118, 7001–7023, 2013.
Galley, R. J., Else, B. G. T., Geilfus, N. X., Hare, A. A., Isleifson, D., Barber, D. G., and Rysgaard, S.: Imaged brine inclusions in young sea ice-Shape, distribution and formation timing, Cold Reg. Sci. Technol., 111, 39–48, 2015.
Garneau, M. È., Vincent, W. F., Alonso-Sáez L., Gratton, Y., and Lovejoy, C.: Prokaryotic community structure and heterotrophic production in a river-influenced coastal arctic ecosystem, Aquat. Microb. Ecol., 32, 27–40, 2006.
Geilfus, N.-X., Carnat, G., Papakyriakou, T., Tison, J. L., Else, B., Thomas, H., Shadwick, E., and Delille, B.: Dynamics of pCO2 and related air-ice CO2 fluxes in the Arctic coastal zone (Amundsen Gulf, Beaufort Sea), J. Geophys. Res., 117, C00G10, https://doi.org/10.1029/2011JC007118, 2012.
Geilfus, N.-X., Carnat, G., Dieckmann, G. S., Halden, N., Nehrke, G., Papakyriakou, T., Tison, J. L., and Delille, B.: First estimates of the contribution of CaCO3 precipitation to the release of CO2 to the atmosphere during young sea ice growth, J. Geophys. Res.-Oceans, 118, 244–255, https://doi.org/10.1029/2012JC007980, 2013a.
Geilfus, N.-X., Galley, R. J., Cooper, M., Halden, N., Hare, A., Wang, F., Søgaard, D. H., and Rysgaard, S.: Gypsum crystals observed in experimental and natural sea ice, Geophys. Res. Lett., 40, 6362–6367, https://doi.org/10.1002/2013GL058479, 2013b.
Geilfus, N.-X., Tison, J.-L., Ackley, S. F., Galley, R. J., Rysgaard, S., Miller, L. A., and Delille, B.: Sea ice pCO2 dynamics and air–ice CO2 fluxes during the Sea Ice Mass Balance in the Antarctic (SIMBA) experiment – Bellingshausen Sea, Antarctica, The Cryosphere, 8, 2395–2407, https://doi.org/10.5194/tc-8-2395-2014, 2014.
Geilfus, N.-X., Galley, R. J., Crabeck, O., Papakyriakou, T., Landy, J., Tison, J.-L., and Rysgaard, S.: Inorganic carbon dynamics of melt-pond-covered first-year sea ice in the Canadian Arctic, Biogeosciences, 12, 2047–2061, https://doi.org/10.5194/bg-12-2047-2015, 2015.
Golden, K. M., Eicken, H., Heaton, A. L., Miner, J., Pringle, D. J., and Zhu, J.: Thermal evolution of permeability and microstructure in sea ice, Geophys. Res. Lett., 34, L16501, https://doi.org/10.1029/2007GL030447, 2007.
Goyet, C. and Poisson, A.: New determination of carbonic acid dissociation constants in seawater as a function of temperature and salinity, Deep-Sea Res., 36, 1635–1654, 1989.
Grasshoff, K., Ehrhardt, M., and Kremling, K.: Methods of sea water analysis, Verlag Chemie, 1983.
Hansen, J. W., Thamdrup, B., and Jørgensen, B. B.: Anoxic incubation of sediment in gas-tight plastic bags: a method for biogeochemical processes studies, Mar. Ecol.-Prog. Ser., 208, 273–282, 2000.
Haraldsson, C., Anderson, L. G., Hassellov, M., Hulth, S., and Olsson, K.: Rapid, high-precision potentiometric titration of alkalinity in ocean and sediment pore waters, Deep-Sea Res. Pt. I, 44, 2031–2044, 1997.
Hare, A. A., Wang, F., Barber, D., Geilfus, N. X., Galley, R. J., and Rysgaard, S.: pH Evolution in sea ice grown at an outdoor experimental facility, Mar. Chem., 154, 46–54, 2013.
Johnson, K. M., Sieburth, J. M., Williams, P. J. L., and Brandstrom, L.: Coulometric total carbon-dioxide analysis for marine studies – automation and calibration, Mar. Chem., 21, 117–133, 1987.
Killawee, J. A., Fairchild, I. J., Tison, J. L., Janssens, L., and Lorrain, R.: Segregation of solutes and gases in experimental freezing of dilute solutions: Implications for natural glacial systems, Geochim. Cosmochim. Ac., 62, 3637–3655, 1998.
Kirchmann, D. L.: Leucine incorporation as a measure of biomass production by heterotrophic bacteria, in: Handbook of Methods in Aquatic Microbial Ecology, Chap. 58, 509–518, 1993.
Kirchmann, D. L.: Measuring bacterial biomass production and growth rates from Leucine incorporation in natural aquatic environments in: Methods in Microbiology, Chap. 12, 227–237, 2001.
Leppäranta, M. and Manninen, T.: The brine and gas content of sea ice with attention to low salinities and high temperatures, Finnish Institute of Marine Research, Helsinki, Finland, Internal Report, 1988-2, 15 pp., 1988.
Loose, B., McGillis, W. R., Perovich, D., Zappa, C. J., and Schlosser, P.: A parameter model of gas exchange for the seasonal sea ice zone, Ocean Sci., 10, 17–28, https://doi.org/10.5194/os-10-17-2014, 2014.
MacGilchrist, G. A., Garabato, A. C. N., Tsubouchi, T., Bacon, S., Torres-Valdes, S., and Azetsu-Scott, K.: The Arctic Ocean carbon sink, Deep-Sea Res. Pt. I, 86, 39–55, 2014.
Marion, G. M.: Carbonate mineral solubility at low temperatures in the Na-K-Mg-Ca-H-Cl-SO4-OH-HCO3-CO3-CO2-H2O system, Geochim. Cosmochim. Ac., 65, 1883–1896, 2001.
Miller, L. A., Papakyriakou, T., Collins, R. E., Deming, J., Ehn, J., Macdonald, R. W., Mucci, A., Owens, O., Raudsepp, M., and Sutherland, N.: Carbon dynamics in sea ice: A winter flux time series, J. Geophys. Res., 116, C02028, https://doi.org/10.1029/2009JC006058, 2011.
Nomura, D., Eicken, H., Gradinger, R., and Shirasawa, K.: Rapid physically driven inversion of the air-sea ice CO2 flux in the seasonal landfast ice off Barrow, Alaska after onset surface melt, Cont. Shelf Res., 30, 1998–2004, 2010.
Nomura, D., Granskog, M. A., Assmy, P., Simizu, D., and Hashida, G.: Arctic and Antarctic sea ice acts as a sink for atmospheric CO2 during periods of snowmelt and surface flooding, J. Geophys. Res.-Oceans, 118, 6511–6524, https://doi.org/10.1002/2013JC009048, 2013.
Papadimitriou, S., Kennedy, H., Kattner, G., Dieckmann, G. S., and Thomas, D. N.: Experimental evidence for carbonate precipitation and CO2 degassing during sea ice formation, Geochim. Cosmochim Ac., 68, 1749–1761, 2004.
Papakyriakou, T. and Miller, L.: Springtime CO2 exchange over seasonal sea ice in the Canadian Arctic Archipelago, Ann. Glaciol., 52, 215–224, https://doi.org/10.3189/172756411795931534, 2011.
Parmentier, F.-J. W., Christensen, T. R., Sørensen, L. L., Rysgaard, S., McGuire, A. D., Miller, P. A., and Walker, D. A.: The impact of lower sea-ice extent on Arctic greenhouse-gas exchange, Nature Climate Change, 3, 195–202, https://doi.org/10.1038/nclimate1784, 2013.
Parsons, T. R., Maita, Y., and Lali, C. M.: A Manual of Chemical and Biological Methods for Seawater Analysis, Pergamon Press, Toronto, 1984.
Pierrot, D., Lewis, E., and Wallace, D. W. R.: MS Excel Program Developed for CO2 System Calculations, Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee, https://doi.org/10.3334/CDIAC/otg.CO2SYS_XLS_CDIAC105a, 2006.
Popova, E. E., Yool, A., Aksenov, Y., Coward, A. C., and Anderson, T. R.: Regional variability of acidification in the Arctic: a sea of contrasts, Biogeosciences, 11, 293–308, https://doi.org/10.5194/bg-11-293-2014, 2014.
Rysgaard, S., Glud, R. N., Sejr, M. K., Bendtsen, J., and Christensen, P. B.: Inorganic carbon transport during sea ice growth and decay: A carbon pump in polar seas, J. Geophys. Res., 112, C03016, https://doi.org/10.1029/2006JC003572, 2007.
Rysgaard, S., Bendtsen, J., Pedersen, L. T., Ramlov, H., and Glud, R. N.: Increased CO2 uptake due to sea ice growth and decay in the Nordic Seas, J. Geophys. Res., 114, C09011, https://doi.org/10.1029/2008JC005088, 2009.
Rysgaard, S., Søgaard, D. H., Cooper, M., Pucko, M., Lennert, K., Papakyriakou, T. N., Wang, F., Geilfus, N. X., Glud, R. N., Ehn, J., McGinnis, D. F., Attard, K., Sievers, J., Deming, J. W., and Barber, D.: Ikaite crystal distribution in winter sea ice and implications for CO2 system dynamics, The Cryosphere, 7, 707–718, https://doi.org/10.5194/tc-7-707-2013, 2013.
Rysgaard, S., Wang, F., Galley, R. J., Grimm, R., Notz, D., Lemes, M., Geilfus, N.-X., Chaulk, A., Hare, A. A., Crabeck, O., Else, B. G. T., Campbell, K., Sørensen, L. L., Sievers, J., and Papakyriakou, T.: Temporal dynamics of ikaite in experimental sea ice, The Cryosphere, 8, 1469–1478, https://doi.org/10.5194/tc-8-1469-2014, 2014.
Sabine, C. L., Feely, R. A., Gruber, N., Key, R. M., Lee, K., Bullister, J. L., Wanninkhof, R., Wong, C. S., Wallace, D. W. R., Tilbrook, B., Millero, F. J., Peng, T. H., Kozyr, A., Ono, T., and Rios, A. F.: The oceanic sink for anthropogenic CO2, Science, 305, 367–371, 2004.
Sejr, M. K., Krause-Jensen, D., Rysgaard, S., Sorensen, L. L., Christensen, P. B., and Glud, R. N.: Air-sea flux of CO2 in arctic coastal waters influenced by glacial melt water and sea ice, Tellus B, 63, 815–822, 2011.
Semiletov, I. P., Makshtas, A., Akasofu, S. I., and Andreas, E. L.: Atmospheric CO2 balance: The role of Arctic sea ice, Geophys. Res. Lett., 31, L05121, https://doi.org/10.1029/2003GL017996, 2004.
Søgaard, D. H., Thomas, D. N, Rysgaard, S., Norman, L., Kaartokallio, H., Juul-Pedersen T., Glud, R. N., and Geilfus, N. X.: The relative contributions of biological and abiotic processes to the carbon dynamics in subarctic sea ice, Polar Biol., 36, 1761–1777, https://doi.org/10.1007/s00300-013-1396-3, 2013.
Yamamoto, A., Kawamiya, M., Ishida, A., Yamanaka, Y., and Watanabe, S.: Impact of rapid sea-ice reduction in the Arctic Ocean on the rate of ocean acidification, Biogeosciences, 9, 2365–2375, https://doi.org/10.5194/bg-9-2365-2012, 2012.
Yamamoto-Kawai, M., McLaughlin, F. A., Carmack, E. C., Nishino, S., and Shimada, K.: Freshwater budget of the Canada Basin, Arctic Ocean, from salinity, δ18O, and nutrients, J. Geophys. Res.-Oceans, 113, C01007, https://doi.org/10.1029/2006JC003858, 2008.
Yamamoto-Kawai, M., McLaughlin, F. A., Carmack, E. C., Nishino, S., and Shimada, K.: Aragonite Undersaturation in the Arctic Ocean: Effects of Ocean Acidification and Sea Ice Melt, Science, 326, 1098–1100, 2009.
Zeebe, R. E. and Wolf-Gladrow, D.: CO2 in Seawater: Equilibrium, Kinetics, Isotopes, Elsevier, Amsterdam, 2001.
Short summary
The fate of ikaite precipitation within sea ice is poorly understood. In this study, we estimated ikaite precipitation of up to 167 µmol kg-1 within sea ice, while its export and dissolution into the underlying seawater was responsible for a TA increase of 64–66 μmol kg-1. We estimated that more than half of the total ikaite precipitated was still contained in the ice when sea ice began to melt. The dissolution of the ikaite crystals in the water column kept the seawater pCO2 undersaturated.
The fate of ikaite precipitation within sea ice is poorly understood. In this study, we...
