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

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

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Ocean acidification affects marine ecosystems and carbon cycling, and is considered a direct effect of anthropogenic carbon dioxide uptake from the atmosphere. Accumulation of atmospheric CO2 in ocean surface waters is predicted to make the ocean twice as acidic by the end of this century. The Arctic Ocean is particularly sensitive to ocean acidification because more CO2 can dissolve in cold water. Here we present observations of the chemical and physical characteristics of East Siberian Arctic Shelf waters from 1999, 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 and Î 18 O data 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
Pages (from-to)361-365
Number of pages5
JournalNature Geoscience
Volume9
Issue number5
DOIs
Publication statusPublished - 1 May 2016

Fingerprint

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

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this

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

In: Nature Geoscience, Vol. 9, No. 5, 01.05.2016, p. 361-365.

Research output: Contribution to journalArticle

Semiletov, IP, Pipko, II, Gustafsson, Ö, Anderson, LG, Sergienko, V, Pugach, SP, Dudarev, OV, Charkin, A, Gukov, A, Bröder, L, Andersson, A, Spivak, E & Shakhova, NE 2016, 'Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon', Nature Geoscience, vol. 9, no. 5, pp. 361-365. https://doi.org/10.1038/ngeo2695
Semiletov, Igor Petrovich ; Pipko, Irina Ivanovna ; Gustafsson, Örjan ; Anderson, Leif G. ; Sergienko, Valentin ; Pugach, Svetlana Petrovna ; Dudarev, Oleg Victorovich ; Charkin, Alexander ; Gukov, Alexander ; Bröder, Lisa ; Andersson, August ; Spivak, Eduard ; Shakhova, Natalia Evgenievna. / Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon. In: Nature Geoscience. 2016 ; Vol. 9, No. 5. pp. 361-365.
@article{dd9f1e0c6928471a94536ac3d984bed5,
title = "Acidification of East Siberian Arctic Shelf waters through addition of freshwater and terrestrial carbon",
abstract = "Ocean acidification affects marine ecosystems and carbon cycling, and is considered a direct effect of anthropogenic carbon dioxide uptake from the atmosphere. Accumulation of atmospheric CO2 in ocean surface waters is predicted to make the ocean twice as acidic by the end of this century. The Arctic Ocean is particularly sensitive to ocean acidification because more CO2 can dissolve in cold water. Here we present observations of the chemical and physical characteristics of East Siberian Arctic Shelf waters from 1999, 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 and {\^I} 18 O data 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.",
author = "Semiletov, {Igor Petrovich} and Irina Ivanovna Pipko and {\"O}rjan Gustafsson and Anderson, {Leif G.} and Valentin Sergienko and Pugach, {Svetlana Petrovna} and Dudarev, {Oleg Victorovich} and Alexander Charkin and Alexander Gukov and Lisa Br{\"o}der and August Andersson and Eduard Spivak and Natalia Evgenievna Shakhova",
year = "2016",
month = "5",
day = "1",
doi = "10.1038/ngeo2695",
language = "English",
volume = "9",
pages = "361--365",
journal = "Nature Geoscience",
issn = "1752-0894",
publisher = "Nature Publishing Group",
number = "5",

}

TY - JOUR

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

AU - Semiletov, Igor Petrovich

AU - Pipko, Irina Ivanovna

AU - Gustafsson, Örjan

AU - Anderson, Leif G.

AU - Sergienko, Valentin

AU - Pugach, Svetlana Petrovna

AU - Dudarev, Oleg Victorovich

AU - Charkin, Alexander

AU - Gukov, Alexander

AU - Bröder, Lisa

AU - Andersson, August

AU - Spivak, Eduard

AU - Shakhova, Natalia Evgenievna

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 atmosphere. Accumulation of atmospheric CO2 in ocean surface waters is predicted to make the ocean twice as acidic by the end of this century. The Arctic Ocean is particularly sensitive to ocean acidification because more CO2 can dissolve in cold water. Here we present observations of the chemical and physical characteristics of East Siberian Arctic Shelf waters from 1999, 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 and Î 18 O data 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 atmosphere. Accumulation of atmospheric CO2 in ocean surface waters is predicted to make the ocean twice as acidic by the end of this century. The Arctic Ocean is particularly sensitive to ocean acidification because more CO2 can dissolve in cold water. Here we present observations of the chemical and physical characteristics of East Siberian Arctic Shelf waters from 1999, 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 and Î 18 O data 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.

UR - http://www.scopus.com/inward/record.url?scp=84971272978&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84971272978&partnerID=8YFLogxK

U2 - 10.1038/ngeo2695

DO - 10.1038/ngeo2695

M3 - Article

VL - 9

SP - 361

EP - 365

JO - Nature Geoscience

JF - Nature Geoscience

SN - 1752-0894

IS - 5

ER -