Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon

Igor Semiletov, Irina Pipko, Örjan Gustafsson, Leif G. Anderson, Valentin Sergienko, Svetlana Pugach, Oleg Dudarev, Alexander Charkin, Alexander Gukov, Lisa Bröder, August Andersson, Eduard Spivak, Natalia Shakhova

Research output: Chapter in Book / Report / Conference proceedingChapterAcademicpeer-review

Abstract

Ocean acidification affects marine ecosystems and carbon cycling, and is considered a direct effect of anthropogenic carbon dioxide uptake from the atmosphere1–3 . Accumulation of atmospheric CO2 in ocean surface waters is predicted to make the ocean twice as acidic by the end of this century4 . The ArcticOcean is particularly sensitive to ocean acidification becausemoreCO2 candissolveincoldwater5,6 .Herewepresent observations of the chemical and physical characteristics of EastSiberianArctic Shelfwatersfrom1999,2000–2005,2008 and 2011, and find extreme aragonite undersaturation that reflects acidity levels in excess of those projected in this region for 2100. Dissolved inorganic carbon isotopic data and Markov chain Monte Carlo simulations of water sources using salinity andδ18 Odata suggest that the persistent acidification is driven by the degradation of terrestrial organic matter and discharge of Arctic river water with elevated CO2 concentrations, rather than by uptake of atmospheric CO2 . We suggest that East Siberian Arctic Shelf waters may become more acidic if thawing permafrost leads to enhanced terrestrial organic carbon inputs and if freshwater additions continue to increase, which may affect their efficiency as a source of CO2.
Original languageEnglish
Title of host publicationNature Geoscience
PublisherNature Publishing Group
Pages361-365
Number of pages5
ISBN (Print)1752-0894
DOIs
Publication statusPublished - 1 May 2016

Publication series

NameNature Geoscience
Volume9

Fingerprint

acidification
carbon
dissolved inorganic carbon
thawing
Markov chain
aragonite
marine ecosystem
permafrost
river water
acidity
sea surface
carbon dioxide
organic carbon
surface water
salinity
organic matter
water
degradation
ocean
simulation

Cite this

Semiletov, I., Pipko, I., Gustafsson, Ö., Anderson, L. G., Sergienko, V., Pugach, S., ... Shakhova, N. (2016). Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon. In Nature Geoscience (pp. 361-365). (Nature Geoscience; Vol. 9). Nature Publishing Group. https://doi.org/10.1038/ngeo2695
Semiletov, Igor ; Pipko, Irina ; Gustafsson, Örjan ; Anderson, Leif G. ; Sergienko, Valentin ; Pugach, Svetlana ; Dudarev, Oleg ; Charkin, Alexander ; Gukov, Alexander ; Bröder, Lisa ; Andersson, August ; Spivak, Eduard ; Shakhova, Natalia. / Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon. Nature Geoscience. Nature Publishing Group, 2016. pp. 361-365 (Nature Geoscience).
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Semiletov, I, Pipko, I, Gustafsson, Ö, Anderson, LG, Sergienko, V, Pugach, S, Dudarev, O, Charkin, A, Gukov, A, Bröder, L, Andersson, A, Spivak, E & Shakhova, N 2016, Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon. in Nature Geoscience. Nature Geoscience, vol. 9, Nature Publishing Group, pp. 361-365. https://doi.org/10.1038/ngeo2695

Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon. / Semiletov, Igor; Pipko, Irina; Gustafsson, Örjan; Anderson, Leif G.; Sergienko, Valentin; Pugach, Svetlana; Dudarev, Oleg; Charkin, Alexander; Gukov, Alexander; Bröder, Lisa; Andersson, August; Spivak, Eduard; Shakhova, Natalia.

Nature Geoscience. Nature Publishing Group, 2016. p. 361-365 (Nature Geoscience; Vol. 9).

Research output: Chapter in Book / Report / Conference proceedingChapterAcademicpeer-review

TY - CHAP

T1 - Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon

AU - Semiletov, Igor

AU - Pipko, Irina

AU - Gustafsson, Örjan

AU - Anderson, Leif G.

AU - Sergienko, Valentin

AU - Pugach, Svetlana

AU - Dudarev, Oleg

AU - Charkin, Alexander

AU - Gukov, Alexander

AU - Bröder, Lisa

AU - Andersson, August

AU - Spivak, Eduard

AU - Shakhova, Natalia

PY - 2016/5/1

Y1 - 2016/5/1

N2 - Ocean acidification affects marine ecosystems and carbon cycling, and is considered a direct effect of anthropogenic carbon dioxide uptake from the atmosphere1–3 . Accumulation of atmospheric CO2 in ocean surface waters is predicted to make the ocean twice as acidic by the end of this century4 . The ArcticOcean is particularly sensitive to ocean acidification becausemoreCO2 candissolveincoldwater5,6 .Herewepresent observations of the chemical and physical characteristics of EastSiberianArctic Shelfwatersfrom1999,2000–2005,2008 and 2011, and find extreme aragonite undersaturation that reflects acidity levels in excess of those projected in this region for 2100. Dissolved inorganic carbon isotopic data and Markov chain Monte Carlo simulations of water sources using salinity andδ18 Odata suggest that the persistent acidification is driven by the degradation of terrestrial organic matter and discharge of Arctic river water with elevated CO2 concentrations, rather than by uptake of atmospheric CO2 . We suggest that East Siberian Arctic Shelf waters may become more acidic if thawing permafrost leads to enhanced terrestrial organic carbon inputs and if freshwater additions continue to increase, which may affect their efficiency as a source of CO2.

AB - Ocean acidification affects marine ecosystems and carbon cycling, and is considered a direct effect of anthropogenic carbon dioxide uptake from the atmosphere1–3 . Accumulation of atmospheric CO2 in ocean surface waters is predicted to make the ocean twice as acidic by the end of this century4 . The ArcticOcean is particularly sensitive to ocean acidification becausemoreCO2 candissolveincoldwater5,6 .Herewepresent observations of the chemical and physical characteristics of EastSiberianArctic Shelfwatersfrom1999,2000–2005,2008 and 2011, and find extreme aragonite undersaturation that reflects acidity levels in excess of those projected in this region for 2100. Dissolved inorganic carbon isotopic data and Markov chain Monte Carlo simulations of water sources using salinity andδ18 Odata suggest that the persistent acidification is driven by the degradation of terrestrial organic matter and discharge of Arctic river water with elevated CO2 concentrations, rather than by uptake of atmospheric CO2 . We suggest that East Siberian Arctic Shelf waters may become more acidic if thawing permafrost leads to enhanced terrestrial organic carbon inputs and if freshwater additions continue to increase, which may affect their efficiency as a source of CO2.

U2 - 10.1038/ngeo2695

DO - 10.1038/ngeo2695

M3 - Chapter

SN - 1752-0894

T3 - Nature Geoscience

SP - 361

EP - 365

BT - Nature Geoscience

PB - Nature Publishing Group

ER -

Semiletov I, Pipko I, Gustafsson Ö, Anderson LG, Sergienko V, Pugach S et al. Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon. In Nature Geoscience. Nature Publishing Group. 2016. p. 361-365. (Nature Geoscience). https://doi.org/10.1038/ngeo2695