Articles | Volume 13, issue 6
https://doi.org/10.5194/os-13-997-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/os-13-997-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
28 Nov 2017
Research article |
| 28 Nov 2017
The spatial and interannual dynamics of the surface water carbonate system and air–sea CO2 fluxes in the outer shelf and slope of the Eurasian Arctic Ocean
Irina I. Pipko
CORRESPONDING AUTHOR
V. I. Il'ichev Pacific Oceanological Institute, Russian Academy of
Sciences, Vladivostok, Russia
National Research Tomsk Polytechnic University, Tomsk, Russia
Svetlana P. Pugach
V. I. Il'ichev Pacific Oceanological Institute, Russian Academy of
Sciences, Vladivostok, Russia
National Research Tomsk Polytechnic University, Tomsk, Russia
Igor P. Semiletov
V. I. Il'ichev Pacific Oceanological Institute, Russian Academy of
Sciences, Vladivostok, Russia
National Research Tomsk Polytechnic University, Tomsk, Russia
International Arctic Research Center, University of Alaska Fairbanks,
Fairbanks, AK, USA
Leif G. Anderson
Department of Marine Sciences, University of Gothenburg, Gothenburg,
Sweden
Natalia E. Shakhova
National Research Tomsk Polytechnic University, Tomsk, Russia
International Arctic Research Center, University of Alaska Fairbanks,
Fairbanks, AK, USA
Örjan Gustafsson
Department of Environmental Science and Analytical Chemistry,
Stockholm University, Stockholm, Sweden
Bolin Centre for Climate Research, Stockholm University, Stockholm,
Sweden
Irina A. Repina
A. M. Obukhov Institute of Atmospheric Physics, Russian Academy of
Sciences, Moscow, Russia
Eduard A. Spivak
V. I. Il'ichev Pacific Oceanological Institute, Russian Academy of
Sciences, Vladivostok, Russia
Alexander N. Charkin
V. I. Il'ichev Pacific Oceanological Institute, Russian Academy of
Sciences, Vladivostok, Russia
National Research Tomsk Polytechnic University, Tomsk, Russia
Anatoly N. Salyuk
V. I. Il'ichev Pacific Oceanological Institute, Russian Academy of
Sciences, Vladivostok, Russia
National Research Tomsk Polytechnic University, Tomsk, Russia
Kseniia P. Shcherbakova
V. I. Il'ichev Pacific Oceanological Institute, Russian Academy of
Sciences, Vladivostok, Russia
National Research Tomsk Polytechnic University, Tomsk, Russia
Elena V. Panova
National Research Tomsk Polytechnic University, Tomsk, Russia
Oleg V. Dudarev
V. I. Il'ichev Pacific Oceanological Institute, Russian Academy of
Sciences, Vladivostok, Russia
National Research Tomsk Polytechnic University, Tomsk, Russia
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Jorien E. Vonk, Tommaso Tesi, Lisa Bröder, Henry Holmstrand, Gustaf Hugelius, August Andersson, Oleg Dudarev, Igor Semiletov, and Örjan Gustafsson
The Cryosphere, 11, 1879–1895, https://doi.org/10.5194/tc-11-1879-2017, https://doi.org/10.5194/tc-11-1879-2017, 2017
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Leif G. Anderson, Göran Björk, Ola Holby, Sara Jutterström, Carl Magnus Mörth, Matt O'Regan, Christof Pearce, Igor Semiletov, Christian Stranne, Tim Stöven, Toste Tanhua, Adam Ulfsbo, and Martin Jakobsson
Ocean Sci., 13, 349–363, https://doi.org/10.5194/os-13-349-2017, https://doi.org/10.5194/os-13-349-2017, 2017
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Christof Pearce, Aron Varhelyi, Stefan Wastegård, Francesco Muschitiello, Natalia Barrientos, Matt O'Regan, Thomas M. Cronin, Laura Gemery, Igor Semiletov, Jan Backman, and Martin Jakobsson
Clim. Past, 13, 303–316, https://doi.org/10.5194/cp-13-303-2017, https://doi.org/10.5194/cp-13-303-2017, 2017
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Leif G. Anderson, Jörgen Ek, Ylva Ericson, Christoph Humborg, Igor Semiletov, Marcus Sundbom, and Adam Ulfsbo
Biogeosciences, 14, 1811–1823, https://doi.org/10.5194/bg-14-1811-2017, https://doi.org/10.5194/bg-14-1811-2017, 2017
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Erik Gustafsson, Christoph Humborg, Göran Björk, Christian Stranne, Leif G. Anderson, Marc C. Geibel, Carl-Magnus Mörth, Marcus Sundbom, Igor P. Semiletov, Brett F. Thornton, and Bo G. Gustafsson
Biogeosciences Discuss., https://doi.org/10.5194/bg-2017-115, https://doi.org/10.5194/bg-2017-115, 2017
Preprint withdrawn
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In this study we quantify key carbon cycling processes on the East Siberian Arctic Shelf. A specific aim is to determine the pathways of terrestrial organic carbon (OC) supplied by rivers and coastline erosion – and particularly to what extent degradation of terrestrial OC contributes to air-sea CO2 exchange. We estimate that the shelf is a weak CO2 sink, although this sink is considerably reduced mainly by degradation of eroded OC and to a lesser extent by degradation of riverine OC.
Joan A. Salvadó, Tommaso Tesi, Marcus Sundbom, Emma Karlsson, Martin Kruså, Igor P. Semiletov, Elena Panova, and Örjan Gustafsson
Biogeosciences, 13, 6121–6138, https://doi.org/10.5194/bg-13-6121-2016, https://doi.org/10.5194/bg-13-6121-2016, 2016
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Fluvial discharge and coastal erosion of the permafrost-dominated East Siberian Arctic delivers large quantities of terrigenous organic carbon (Terr-OC) to marine waters. We assessed its fate and composition in different marine pools with a suite of biomarkers. The dissolved organic carbon is transporting off-shelf “young” and fresh vascular plant material, while sedimentary and near-bottom particulate organic carbon preferentially carries old organic carbon released from thawing permafrost.
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.
Lisa Bröder, Tommaso Tesi, Joan A. Salvadó, Igor P. Semiletov, Oleg V. Dudarev, and Örjan Gustafsson
Biogeosciences, 13, 5003–5019, https://doi.org/10.5194/bg-13-5003-2016, https://doi.org/10.5194/bg-13-5003-2016, 2016
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Thawing permafrost may release large amounts of terrestrial organic carbon (TerrOC) to the Arctic Ocean. We assessed its fate in the marine environment with a suite of biomarkers. Across the Laptev Sea their concentrations in surface sediments decreased significantly and showed a trend to qualitatively more degraded TerrOC with increasing water depth. We infer that the degree of degradation of TerrOC is a function of the time spent under oxic conditions during protracted cross-shelf transport.
Juliane Bischoff, Robert B. Sparkes, Ayça Doğrul Selver, Robert G. M. Spencer, Örjan Gustafsson, Igor P. Semiletov, Oleg V. Dudarev, Dirk Wagner, Elizaveta Rivkina, Bart E. van Dongen, and Helen M. Talbot
Biogeosciences, 13, 4899–4914, https://doi.org/10.5194/bg-13-4899-2016, https://doi.org/10.5194/bg-13-4899-2016, 2016
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The Arctic contains a large pool of carbon that is vulnerable to warming and can be released by rivers and coastal erosion. We study microbial lipids (BHPs) in permafrost and shelf sediments to trace the source, transport and fate of this carbon. BHPs in permafrost deposits are released to the shelf by rivers and coastal erosion, in contrast to other microbial lipids (GDGTs) that are transported by rivers. Several further analyses are needed to understand the complex East Siberian Shelf system.
X. Feng, Ö. Gustafsson, R. M. Holmes, J. E. Vonk, B. E. van Dongen, I. P. Semiletov, O. V. Dudarev, M. B. Yunker, R. W. Macdonald, D. B. Montluçon, and T. I. Eglinton
Biogeosciences, 12, 4841–4860, https://doi.org/10.5194/bg-12-4841-2015, https://doi.org/10.5194/bg-12-4841-2015, 2015
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Currently very few studies have examined the distribution and fate of hydrolyzable organic carbon (OC) in Arctic sediments, whose fate remains unclear in the context of climate change. Our study focuses on the source, distribution and fate of hydrolyzable OC as compared with plant wax lipids and lignin phenols in the sedimentary particles of nine Arctic and sub-Arctic rivers. This multi-molecular approach allows for a comprehensive investigation of terrestrial OC transfer via Arctic rivers.
R. B. Sparkes, A. Doğrul Selver, J. Bischoff, H. M. Talbot, Ö. Gustafsson, I. P. Semiletov, O. V. Dudarev, and B. E. van Dongen
Biogeosciences, 12, 3753–3768, https://doi.org/10.5194/bg-12-3753-2015, https://doi.org/10.5194/bg-12-3753-2015, 2015
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Siberian permafrost contains large amounts of organic carbon that may be released by climate warming. We collected and analysed samples from the East Siberian Sea, using GDGT biomarkers to trace the sourcing and deposition of organic carbon across the shelf. We show that branched GDGTs may be used to trace river erosion. Results from modelling show that organic carbon on the shelf is a complex process involving river-derived and coastal-derived material as well as marine carbon production.
E. N. Kirillova, A. Andersson, J. Han, M. Lee, and Ö. Gustafsson
Atmos. Chem. Phys., 14, 1413–1422, https://doi.org/10.5194/acp-14-1413-2014, https://doi.org/10.5194/acp-14-1413-2014, 2014
I. P. Semiletov, N. E. Shakhova, I. I. Pipko, S. P. Pugach, A. N. Charkin, O. V. Dudarev, D. A. Kosmach, and S. Nishino
Biogeosciences, 10, 5977–5996, https://doi.org/10.5194/bg-10-5977-2013, https://doi.org/10.5194/bg-10-5977-2013, 2013
Related subject area
Approach: In situ Observations | Depth range: Surface | Geographical range: Shelf Seas | Phenomena: Air-Sea Fluxes
pCO2 variability in the surface waters of the eastern Gulf of Cádiz (SW Iberian Peninsula)
A 3-year time series of volatile organic iodocarbons in Bedford Basin, Nova Scotia: a northwestern Atlantic fjord
Spatiotemporal variations of fCO2 in the North Sea
Dolores Jiménez-López, Ana Sierra, Teodora Ortega, Soledad Garrido, Nerea Hernández-Puyuelo, Ricardo Sánchez-Leal, and Jesús Forja
Ocean Sci., 15, 1225–1245, https://doi.org/10.5194/os-15-1225-2019, https://doi.org/10.5194/os-15-1225-2019, 2019
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The present study describes the surface distribution of the partial pressure of CO2 in the continental shelf of the eastern Gulf of Cádiz. For this, eight oceanographic cruises were carried out between March 2014 and February 2016. This distribution presents a linear dependence with the temperature and it decreases with distance from the coast. The Gulf of Cádiz shows a mean rate of −0.18 ± 1.32 mmol m-2 d-1, with an annual uptake capacity of CO2 of 4.1 Gg C year-1.
Qiang Shi and Douglas Wallace
Ocean Sci., 14, 1385–1403, https://doi.org/10.5194/os-14-1385-2018, https://doi.org/10.5194/os-14-1385-2018, 2018
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Time series observations can reveal processes and controlling factors underlying the production and loss of iodocarbons in the ocean and provide data for testing hypotheses and models. We report weekly observations from May 2015 to December 2017 at four depths in Bedford Basin, Canada. Iodocarbons in near-surface waters showed strong seasonal variability and similarities and differences in their correlation with temporal variations of potentially related properties and causal factors.
A. M. Omar, A. Olsen, T. Johannessen, M. Hoppema, H. Thomas, and A. V. Borges
Ocean Sci., 6, 77–89, https://doi.org/10.5194/os-6-77-2010, https://doi.org/10.5194/os-6-77-2010, 2010
Cited articles
Abrahamsen, E. P., Meredith, M. P., Falkner, K. K., Torres-Valdes, S., Leng, M. J., Alkire, M. B., Bacon, S., Laxon, S. W., Polyakov, I., and Ivanov, V.: Tracer-derived freshwater budget of the Siberian Continental Shelf following the extreme Arctic summer of 2007, Geophys. Res. Lett., 36, L07602, https://doi.org/10.1029/2009GL037341, 2009.
Alling, V., Sánchez-García, L., Porcelli, D., Pugach, S., Vonk, J., van Dongen, B., Mörth, C. M., Anderson, L. G., Sokolov, A., Andersson, P., Humborg, C., Semiletov, I., and Gustafsson, Ö.: Nonconservative behavior of dissolved organic carbon across the Laptev and East Siberian seas, Global Biogeochem. Cy., 24, GB4033, https://doi.org/10.1029/2010GB003834, 2010.
Anderson, L. G., Olsson, K., and Chierici, M.: A carbon budget for the Arctic Ocean, Global Biogeochem. Cy., 12, 455–465, 1998.
Anderson, L. G., Jutterström, S., Hjalmarsson, S., Wáhlström, I., and Semiletov, I. P.: Out-gassing of CO2 from Siberian shelf seas by terrestrial organic matter decomposition, Geophys. Res. Lett., 36, L20601, https://doi.org/10.1029/2009GL040046, 2009.
Anderson, L. G., Björk, G., Jutterström, S., Pipko, I., Shakhova, N., Semiletov, I., and Wåhlström, I.: East Siberian Sea, an Arctic region of very high biogeochemical activity, Biogeosciences, 8, 1745–1754, https://doi.org/10.5194/bg-8-1745-2011, 2011.
Anderson, L. G., Ek, J., Ericson, Y., Humborg, C., Semiletov, I., Sundbom, M., and Ulfsbo, A.: Export of calcium carbonate corrosive waters from the East Siberian Sea, Biogeosciences, 14, 1811–1823, https://doi.org/10.5194/bg-14-1811-2017, 2017.
Årthun, M., Bellerby, R. G. J., Omar, A. M., and Schrum, C.: Spatiotemporal variability of air–sea CO2 fluxes in the Barents Sea, as determined from empirical relationships and modeled hydrography, J. Marine Syst., 98–99, 40–50, 2012.
Bates, N. R.: Air–sea CO2 fluxes and the continental shelf pump of carbon in the Chukchi Sea adjacent to the Arctic Ocean, J. Geophys. Res., 111, C10013, https://doi.org/10.1029/2005JC003083, 2006.
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.
Bauch, D., Dmitrenko, I. A., Wegner, C., Hölemann, J., Kirillov, S. A., Timokhov, L. A., and Kassens H.: Exchange of Laptev Sea and Arctic Ocean halocline waters in response to atmospheric forcing, J. Geophys. Res., 114, C05008, https://doi.org/10.1029/2008JC005062, 2009.
Bauch, D., Groger, M., Dmitrenko, I., Holemann, J., Kirillov, S., Mackensen, A., Taldenkova, E., and Andersen, N.: Atmospheric controlled freshwater release at the Laptev Sea continental margin, Polar Res., 30, 5858, https://doi.org/10.3402/polar.v30i0.5858, 2011.
Bélanger, S., Xie, H., Krotkov, N., Larouche, P., Vincent, W. F., and Babin, M.: Photomineralization of terrigenous dissolved organic matter in Arctic coastal waters from 1979 to 2003: Interannual variability and implications of climate change, Global Biogeochem. Cycles, 20, GB4005, https://doi.org/10.1029/2006GB002708, 2006.
Bhatt, U. S., Walker, D. A., Raynolds, M. K., Comiso, J. C., Epstein, H. E., Jia, G., Gens, R., Pinzon, J. E., Tucker, C. J., Tweedie, C. E., and Webber, P.J.: Circumpolar Arctic tundra vegetation change is linked to sea-ice decline, Earth Interact., 14, 1–20, https://doi.org/10.1175/2010EI315.1, 2010.
Bischoff, J., Sparkes, R. B., Dogrul Selver, A., Spencer, R. G. M., Gustafsson, Ö., Semiletov, I. P., Dudarev, O. V., Wagner, D., Rivkina, E., van Dongen, B. E., and Talbot, H. M.: Source, transport and fate of soil organic matter inferred from microbial biomarker lipids on the East Siberian Arctic Shelf, Biogeosciences, 13, 4899–4914, https://doi.org/10.5194/bg-13-4899-2016, 2016.
Bröder, L., Tesi, T., Salvadó, J. A., Semiletov, I. P., Dudarev, O. V., and Gustafsson, Ö.: Fate of terrigenous organic matter across the Laptev Sea from the mouth of the Lena River to the deep sea of the Arctic interior, Biogeosciences, 13, 5003–5019, https://doi.org/10.5194/bg-13-5003-2016, 2016
Bruevich, S. V.: Instruction for Chemical Investigation of Seawater, Glavsevmorput, Moscow, 83 pp., 1944 (in Russian).
Carmack, E., Barber, D., Christensen, J., Macdonald, R., Rudels, B., and Sakshaug, E.: Climate variability and physical forcing of the food webs and the carbon budget on panarctic shelves, Prog. Oceanogr., 71, 145–181, 2006.
Charkin, A. N., Dudarev, O. V., Shakhova, N. E., Semiletov, I. P., Pipko, I. I., Pugach, S. P., and Sergienko, V.I.: Peculiarities of the formation of suspended particulate matter fields in the eastern Arctic seas, Dokl. Earth Sci., 462, 626–630, 2015.
DeGrandpre, M. D., Hammar, T. R., Smith, S. P., and Sayles, F. L.: In-situ measurements of seawater pCO2, Limnol. Oceanogr., 40, 969–975, 1995.
Dickson, A. G.: Standard potential of the reaction: AgCl(s) + 1/2 H2(g) = Ag(s) + HCl(aq), and the standard acidity constant of the ion HSO4− in synthetic sea water from 273.15 to 318.15 K, J. Chem. Thermodyn., 22, 113–127, 1990a.
Dickson, A. G.: Thermodynamics of the dissolution of boric acid in synthetic seawater from 273.15° K to 318.15° K, Deep-Sea Res. Pt. I, 37, 755–766, 1990b.
Dickson, A. G. and Millero, F. J.: A comparison of the equilibrium constants for the dissociation of carbonic acid in seawater media, Deep-Sea Res., 34, 1733–1743, 1987.
Dickson, A. G., Sabine, C. L., and Christian, J. R.: Guide to best practices for ocean CO2 measurements, PICES Special Publication 3, IOCCP Report no. 8, 2007.
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.
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., US Department of Energy, 1994.
Dudarev, O. V., Semiletov, I. P., and Charkin, A. N.: Particulate material composition in the Lena River-Laptev Sea system: scales of heterogeneities, Dokl. Earth Sci., 411, 1445–1451, 2006.
Ekwurzel, B., Schlosser, P., Mortlock, R., and Fairbanks, R.: River runoff, sea-ice meltwater, and Pacific water distribution and mean residence times in the Arctic Ocean, J. Geophys. Res.-Oceans, 106, 9075–9092, 2001.
Fichot, C. G. and Benner, R.: The fate of terrigenous dissolved organic carbon in a river-influenced ocean margin, Global Biogeochem. Cy., 28, 300–318, https://doi.org/10.1002/2013GB004670, 2014.
Findlay, H. S., Gibson, G., Kedra, M., Morata, N., Orchowska, M., Pavlov, A. K., Reigstad, M., Silyakova, A., Tremblay, J.-E., Walczowski, W., Weydmann, A., and Logvinova, C.: Responses in Arctic marine carbon cycle processes: conceptual scenarios and implications for ecosystem function, Polar Res., 34, 24252, http:10.3402/polar.v34.24252, 2015.
Fransson, A., Chierici, M., Anderson, L. G., Bussmann, I., Kattner, G., Jones, E. P., and Swift, J. H.: The importance of shelf processes for the modification of chemical constituents in the waters of the Eurasian Arctic Ocean: implication for carbon fluxes, Cont. Shelf Res., 21, 225–242, 2001.
Fransson, A., Chierici, M., and Nojiri, Y.: New insights into the spatial variability of the surface water carbon dioxide in varying sea-ice conditions in the Arctic Ocean, Cont. Shelf Res., 29, 1317–1328, https://doi.org/10.1016/j.csr.2009.03.008, 2009.
Granskog, M. A., Macdonald, R. W., Mundy, C. J., and Barber, D. G.: Distribution, characteristics and potential impacts of chromophoric dissolved organic matter (CDOM) in Hudson Strait and Hudson Bay, Canada, Cont. Shelf Res., 27, 2032–2050, 2007.
Granskog, M. A., Pavlov, A. K., Sagan, S., Kowalczuk, P., Raczkowska, A., and Stedmon, C. A.: Effect of sea-ice melt on inherent optical properties and vertical distribution of solar radiant heating in Arctic surface waters, J. Geophys. Res.-Oceans, 120, 7028–7039, https://doi.org/10.1002/2015JC011087, 2015.
Gustafsson, Ö., van Dongen, B. E., Vonk, J. E., Dudarev, O. V., and Semiletov, I. P.: Widespread release of old carbon across the Siberian Arctic echoed by its large rivers, Biogeosciences, 8, 1737–1743, https://doi.org/10.5194/bg-8-1737-2011, 2011.
Harms, I. H. and Karcher, M. J.: Modeling the seasonal variability of hydrography and circulation in the Kara Sea, J. Geophys. Res., 104, 13431–13448, 1999.
Hill, V. J.: Impacts of chromophoric dissolved organic material on surface ocean heating in the Chukchi Sea, J. Geophys. Res., 113, C07024, https://doi.org/10.1029/2007JC004119, 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, A. V., and Zimov, S. A.: Seasonal and Annual Fluxes of Nutrients and Organic Matter from Large Rivers to the Arctic Ocean and Surrounding Seas, Estuar. Coast., 35, 369–382, 2012.
Hopkins, T. S.: The GIN Sea – a synthesis of its physical oceanography and literature review 1972–1985, Earth-Sci. Rev., 30, 175–318, 1991.
Jakobsson, M.: Hypsometry and volume of the Arctic Ocean and its constituent seas, Geochem. Geophys. Geosyst., 3, 1028, https://doi.org/10.1029/2001GC000302, 2002.
Kaltin, S., Anderson, L. G., Olsson, K., Fransson, A., and Chierici, M.: Uptake of atmospheric carbon dioxide in the Barents Sea, J. Mar. Syst., 38, 31–45, 2002.
Karlsson, E., Gelting, J., Tesi, T., van Dongen, B., Semiletov, I., Charkin, A., Dudarev, O., and Gustafsson, Ö.: Different sources and degradation status of dissolved, particulate and sedimentary organic matter along the Eurasian Arctic coastal margin, Global Biogeochem. Cy., 30, 898–916, 2016.
Kattsov, V., Ryabinin, V., Overland, J., Serreze, M., Visbeck, M., Walsh, J., Meier, W., and Zhang, X.: Arctic sea-ice change: A grand challenge of climate science, J. Glaciol., 56, 1115–1121, https://doi.org/10.3189/002214311796406176, 2010.
Lauvset, S. K., Chierici, M., Counillon, F., Omar, A., Nondal, G., Johannessen, T., and Olsen, A.: Annual and seasonal fCO2 and air–sea CO2 fluxes in the Barents Sea, J. Mar. Syst., 113–114, 62–74, 2013.
Lewis, E. and Wallace, D. W. R.: Program developed for CO2 system calculations, ORNL/CDIAC-105, Carbon Dioxide Information Analysis Center. Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee, 1998.
Loeng, H.: Features of the physical oceanographic conditions of the Barents Sea, Polar Res., 10, 5–18, https://doi.org/10.1111/j.1751-8369.1991.tb00630.x, 1991.
Logvinova, C. L., Frey, K. E., and Cooper, L. W.: The potential role of sea ice melt in the distribution of chromophoric dissolved organic matter in the Chukchi and Beaufort Seas, Deep-Sea Res. Pt. II, 130, 28–42, 2016.
Macdonald, R. W., Anderson, L. G., Christensen, J. P., Miller, L. A., Semiletov, I. P., and Stein, R.: The Arctic Ocean: budgets and fluxes, in: Carbon and Nutrient Fluxes in Continental Margins: A Global Synthesis, edited by: Liu, K.-K., Atkinson, L., Quinones, R., and Talaue-McManus, L., Springer-Verlag, 291–303, 2008.
Makhotin, M. S.: Distribution of pacific summer waters in the Arctic Ocean, Problemi Arktiki I Antarktiki, 86, 89–96, 2010 (in Russian).
Makkaveev, P. N., Stunzhas, P. A., and Khlebopashev, P. V.: The distinguishing of the Ob and Yenisei waters in the desalinated lenses of the Kara Sea in 1993 and 2007, Oceanology, 50, 698–705, https://doi.org/10.1134/S0001437010050073, 2010.
Makkaveev, P. N., Melnikova, Z. G., Polukhin, A. A., Stepanova, S. V., Khlebopashev, P. V., and Chultsova, A. L.: Hydrochemical characteristics of the waters in the western part of the Kara Sea, Oceanology, 55, 485–496, https://doi.org/10.1134/S0001437015040116, 2015.
Mann, P. J., Davydova, A., Zimov, N., Spencer, R. G. M., Davydov, S., Bulygina, E., Zimov, S., and Holmes, R. M.: Controls on the composition and lability of dissolved organic matter in Siberia's Kolyma River basin, J. Geophys. Res., 117, G01028, https://doi.org/10.1029/2011JG001798, 2012.
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. Comm., 6, 7856, https://doi.org/10.1038/ncomms8856, 2015.
Mehrbach, C., Culberson, C. H., Hawley, J. E., and Pytkowicz, R. M.: Measurements of the apparent dissociation constants of carbonic acid in seawater at atmospheric pressure, Limnol. Oceanogr., 18, 897–907, 1973.
Nakaoka, S., Aiki, S., Nakazawa, T., Hashida, G., Morimoto, S., Yamanouchi, T., and Yoshikawa-Inoue, H.: Temporal and spatial variations of oceanic pCO2 and air–sea CO2 flux in the Greenland Sea and the Barents Sea, Tellus, 58, 148–161, 2006.
Nedashkovsky, A. P. and Shvetsova, M. G.: Total inorganic carbon in sea-ice, Oceanology, 50, 861–868, 2010.
Nicolsky, D. and Shakhova, N. E.: Modeling sub-sea permafrost in the East Siberian Arctic Shelf: the Dmitry Laptev Strait, Environ. Res. Lett., 5, 015006, https://doi.org/10.1088/1748-9326/5/1/015006, 2010.
Olsson, K. and Anderson, L. G.: Input and biogeochemical transformation of dissolved carbon in the Siberian shelf seas, Cont. Shelf Res., 17, 819–833, 1997.
Omar, A. M., Johannessen, T., Olsen, A., Kaltin, S., and Rey, F.: Seasonal and interannual variability of the air–sea CO2 flux in the Atlantic sector of the Barents Sea, Mar. Chem., 104, 203–213, 2007.
Overland, J. E., Wang, J., Pickart, R. S., and Wang, M.: Recent and Future Changes in the Meteorology of the Pacific Arctic, in: The Pacific Arctic Region: Ecosystem Status and Trends in a Rapidly Changing Environment, edited by: Grebmeier, J. M. and Maslowski, W., Springer Science + Business Media Dordrecht, 17–30, https://doi.org/10.1007/978-94-017-8863-2, 2014.
Pavlova, G. Yu., Tishchenko, P. Ya., Volkova, T. I., Dickson, A., and Wallmann, K.: Intercalibration of Bruevich's method to determine the total alkalinity in seawater, Oceanology, 48, 438–443, 2008.
Pipko, I. I., Semiletov, I. P., Tishchenko, P. Ya., Pugach, S. P., and Christensen, J. P.: Carbonate chemistry dynamics in Bering Strait and the Chukchi Sea, Prog. Oceanogr., 55, 77–94, 2002.
Pipko, I. I., Semiletov, I. P., and Pugach S. P.: The carbonate system of the East Siberian Sea waters, Dokl. Earth Sci., 402, 624–627, 2005.
Pipko, I. I., Pugach, S. P., Semiletov, I. P., and Salyuk, A. N.: Carbonate characteristics of waters of the Arctic Ocean continental slope, Dokl. Earth Sci., 438, 858–863, 2011a.
Pipko, I. I., Semiletov, I. P., Pugach, S. P., Wåhlström, I., and Anderson, L. G.: Interannual variability of air-sea CO2 fluxes and carbon system in the East Siberian Sea, Biogeosciences, 8, 1987–2007, https://doi.org/10.5194/bg-8-1987-2011, 2011b.
Pipko, I. I., Pugach, S. P., and Semiletov, I. P.: Characteristic features of the dynamics of carbonate parameters in the Eastern part of the Laptev Sea, Oceanology, 55, 68–81, 2015.
Pipko, I. I., Pugach, S. P., and Semiletov, I. P.: Assessment of the CO2 fluxes between the ocean and the atmosphere in the eastern part of the Laptev Sea in the ice-free period, Dokl. Earth Sci., 467, 398–401, 2016.
Pitzer, K. S. (Ed.): Ionic interaction approach: theory and data correlation, in: Activity Coefficients in Electrolyte Solutions, 2nd Edn., CRC Press, London, UK, 75–153, 1991.
Pugach, S. P. and Pipko, I. I.: Dynamic of colored dissolved matter on the East-Siberian Sea shelf, Dokl. Earth Sci., 448, 153–156, 2013.
Pugach, S. P., Pipko, I. I., Semiletov, I. P., and Sergienko, V. I.: Optical characteristics of the colored dissolved organic matter on the East Siberian Shelf, Dokl. Earth Sci., 465, 1293–1296, 2015.
Pugach, S. P., Pipko, I. I., Shakhova, N. E., Shirshin, E. A., Perminova, I. V., Gustafsson, Ö., Bondur, V. G., and Semiletov, I. P.: DOM and its optical characteristics in the Laptev and East Siberian seas: Spatial distribution and inter-annual variability (2003–2011), Ocean Sci. Discuss., https://doi.org/10.5194/os-2017-20, in review, 2017.
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.
Rysgaard, S., Glud, R. N., Lennert, K., Cooper, M., Halden, N., Leakey, R. J. G., Hawthorne, F. C., and Barber, D.: Ikaite crystals in melting sea ice – implications for pCO2 and pH levels in Arctic surface waters, The Cryosphere, 6, 901–908, https://doi.org/10.5194/tc-6-901-2012, 2012
Sánchez-García, L., Vonk, J. E., Charkin, A. N., Kosmach, D., Dudarev, O. V., Semiletov, I. P., and Gustafsson, Ö.: Characterisation of three regimes of collapsing Arctic ice complex deposits on the SE Laptev Sea coast using biomarkers and dual carbon isotopes, Permafrost Periglac., 25, 172–183, 2014.
Schauer, U., Loeng, H., Rudels, B., Ozhigin, V. K., and Dieck, W.: Atlantic water flow through the Barents and Kara Seas, Deep-Sea Res. Pt. I, 49, 2281–2298, 2002.
Schirrmeister, L., Grosse, G., Wetterich, S., Overduin, P. P., Strauss, J., Schuur, E. A. G., and Hubberten, H.-W.: Fossil organic matter characteristics in permafrost deposits of the northeast Siberian Arctic, J. Geophys. Res., 116, G00M02, https://doi.org/10.1029/2011JG001647, 2011.
Schlitzer, R.: Ocean Data View, http://odv.awi.de, 2011.
Semiletov, I. P.: Destruction of the coastal permafrost as an important factor in biogeochemistry of the Arctic shelf waters, Dokl. Earth Sci., 368, 679–682, 1999.
Semiletov, I. P., Savelieva, N. I., Weller, G. E., Pipko, I. I., Pugach, S. P., Gukov, A. Y., and Vasilevskaya, L. N.: The dispersion of Siberian river flows into coastal waters: Meteorological, hydrological and hydrochemical Aspects, in: The Freshwater Budget of the Arctic Ocean, edited by: Lewis, E. L., Jones, E. P., Lemke, P., Prowse, T. D., and Wadhams, P., Springer Netherlands, Dordrecht, 323–366, https://doi.org/10.1007/978-94-011-4132-1_15, 2000.
Semiletov, I. P., Pipko, I. I., Repina, I., and Shakhova, N. E.: Carbonate chemistry dynamics and carbon dioxide fluxes across the atmosphere-ice-water interfaces in the Arctic Ocean: Pacific sector of the Arctic, J. Marine Syst., 66, 204–226, 2007.
Semiletov, I. P., Shakhova, N. E., Sergienko, V. I., Pipko, I. I., and Dudarev, O. V.: On carbon transport and fate in the East Siberian Arctic land-shelf-atmosphere system, Environ. Res. Lett., 7, 015201, https://doi.org/10.1088/1748-9326/7/1/015201, 2012.
Semiletov, I. P., Shakhova, N. E., Pipko, I. I., Pugach, S. P., Charkin, A. N., Dudarev, O. V., Kosmach, D. A., and Nishino, S.: Space-time dynamics of carbon and environmental parameters related to carbon dioxide emissions in the Buor-Khaya Bay and adjacent part of the Laptev Sea, Biogeosciences, 10, 5977–5996, https://doi.org/10.5194/bg-10-5977-2013, 2013.
Semiletov, I., Pipko, I., Gustafsson, Ö., Anderson, L. G., Sergienko, V., Pugach, S., Dudarev, O., Charkin, A., Gukov, A., Bröder, L., Andersson, A., Spivak, E., and Shakhova, N.: Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon, Nature Geosci., 9, 361–365, https://doi.org/10.1038/ngeo2695, 2016.
Serreze, M. C. and Barry, R. G.: Processes and impacts of Arctic amplification: A research synthesis, Global Planet. Change, 77, 85–96, 2011.
Serreze, M. C., Holland, M. M., and Stroeve, J.: Perspectives on the Arctic's shrinking sea-ice cover, Science, 315, 5818, 1533–1536, https://doi.org/10.1126/science.1139426, 2007.
Shakhova, N., Sergienko, V., and Semiletov, I.: The contribution of the East Siberian shelf to the modern methane cycle, Herald of the Russian Academy of Sciences, 79, 1, 237–246, 2009.
Shakhova, N., Semiletov, I., Leifer, I., Sergienko, V., Salyuk, A., Kosmach, D., Chernikh, D., Stubbs, Ch., Nicolsky, D., Tumskoy, V., and Gustafsson, Ö.: Ebullition and storm-induced methane release from the East Siberian Arctic Shelf, Nature Geosci., 7, 64–70, 2014.
Shakhova, N., Semiletov, I., Sergienko, V., Lobkovsky, L., Yusupov, V., Salyuk, A., Salomatin, A., Chernykh, D., Kosmach, D., Panteleev, G., Nicolsky, D., Samarkin, V., Joye, S., Charkin, A., Dudarev, O., Meluzov, A., and Gustafsson, Ö.: The East Siberian Arctic Shelf: towards further assessment of permafrost-related methane fluxes and role of sea-ice, Philos. T. Roy. Soc. A, 373, 20140451, https://doi.org/10.1098/rsta.2014.0451, 2015.
Shakhova, N., Semiletov, I., Gustafsson, O., Sergienko, V., Lobkovsky, L., Dudarev, O., Tumskoy, T., Grigoriev, M., Mazurov, A., Salyuk, A., Ananiev, R., Koshurnikov, A., Kosmach, D., Charkin, A., Dmitrevsky, N., Karnaukh, V., Gunar, A., Meluzov, A., and Chernykh, D.: Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf, Nat. Comm., 8, 15872, https://doi.org/10.1038/ncomms15872, 2017.
Stroeve, J. C., Serreze, M. C., Holland, M. M., Kay, J. E., Malanik, J., and Barrett, A. P.: The Arctic's rapidly shrinking sea-ice cover: a research synthesis, Clim. Change, 110, 1005–1027, 2012.
Stroeve, J. C., Markus, T., Boisvert, L., Miller, J., and Barrett, A.: Changes in Arctic melt season and implications for sea-ice loss, Geophys. Res. Lett., 41, 1216–1225, https://doi.org/10.1002/2013GL058951, 2014.
Takahashi, T., Olafsson, J., Goddard, J. G., Chipman, D. W., and Sutherland, S. C.: Seasonal variation of CO2 and nutrients in the high latitude surface oceans: a comparative study, Global Biogeochem. Cy., 7, 843–878, 1993.
Tank, S. E., Raymond, P. A., Striegl, R. G., McClelland, J. W., Holmes, R. M., Fiske, G. J., and Peterson, B. J.: A land-to-ocean perspective on the magnitude, source and implication of DIC flux from major Arctic rivers to the Arctic Ocean, Global Biogeochem. Cy., 26, GB4018, https://doi.org/10.1029/2011GB004192, 2012.
Tesi, T., Semiletov, I., Hugelius, G., Dudarev, O., Kuhry, P., and Gustafsson, Ö.: Composition and fate of terrigenous organic matter along the Arctic land–ocean continuum in East Siberia: Insights from biomarkers and carbon isotopes, Geochim. Cosmochim. Acta, 133, 235–256, 2014.
Tesi, T., Semiletov, I., Dudarev, O., Andersson, A., and Gustafsson, Ö.: Matrix association effects on hydrodynamic sorting and degradation of terrestrial organic matter during cross-shelf transport in the Laptev and East Siberian shelf seas, J. Geophys. Res.-Biogeo., 121, https://doi.org/10.1002/2015JG003067, 2016.
Tishchenko, P. Ya.: Non-ideal properties of the TRIS–TRIS – HCl–NaCl–H2O buffer system in the 0–40 °C temperature interval, Application of the Pitzer equations, Izv. Akad. Nayk. Ser. Khim., 49, 670–675, 2000 (in Russian).
Tishchenko, P. Ya., Wong, C. S., Pavlova, G. Yu., Johnson, W. K., Kang, D.-J., and Kim, K.-R.: The measurement of pH values in seawater using a cell without a liquid junction, Oceanology, 41, 813–822, 2001.
Tishchenko, P. Ya., Kang, D.-J., Chichkin, R. V., Lazaryuk, A. Yu., Wong, C. Sh., and Johnson, W. K.: Application of potentiometric method using a cell without liquid junction to underway pH measurements in surface seawater, Deep-Sea Res. Pt. I, 58, 778–786, 2011.
Vonk, J. E., Semiletov, I. P., Dudarev, O. V., Eglinton, T. I., Andersson, A., Shakhova, N., Charkin, A., Heim, B., and Gustafsson, Ö.: Preferential burial of permafrost-derived organic carbon in Siberian-Arctic shelf waters, J. Geophys. Res.-Oceans, 119, 1–12, https://doi.org/10.1002/2014JC010261, 2014.
Wanninkhof, R.: Relationship between wind speed and gas exchange over the ocean, J. Geophys. Res., 97, 7373–7382, 1992.
Wanninkhof, R. and McGillis, W. R.: A cubic relationship between air-sea CO2 exchange and wind speed, Geophys. Res. Lett., 26, 1889–1892, 1999.
Weiss, R. F.: Carbon dioxide in water and seawater: the solubility of a non-ideal gas, Mar. Chem., 2, 203–215, 1974.
Wood, K. R., Bond, N. A., Danielson, S. L., Overland, J. E., Salo, S. A., Stabeno, P. J., and Whitefield, J.: A decade of environmental change in the Pacific Arctic region, Prog. Oceanogr., 136, 12–31, 2015.
Yakushev, E. V. and Sørensen, K.: On seasonal changes of the carbonate system in the Barents Sea: observations and modeling, Mar. Biol. Res., 9, 822–830, https://doi.org/10.1080/17451000.2013.775454, 2013.
Zatsepin, A. G., Morozov, E. G., Paka, V. T., Demidov, A. N., Kondrashov, A. A., Korzh, A. O., Kremenetskiy V. V., Poyarkov, S. G., and Soloviev, D. M.: Circulation in the Southwestern Part of the Kara Sea in September 2007, Oceanology, 50, 643–656, 2010.
Short summary
The study of the outer shelf and the continental slope waters of the Eurasian Arctic seas has revealed a general trend in the surface pCO2 distribution, which manifested as an increase in pCO2 values eastward. It has been shown that the influence of terrestrial discharge on the carbonate system of East Siberian Arctic sea surface waters is not limited to the shallow shelf and that contemporary climate change impacts the carbon cycle of the Eurasian Arctic Ocean and influences air–sea CO2 flux.
The study of the outer shelf and the continental slope waters of the Eurasian Arctic seas has...
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