Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 46856 10.2205/2018ES000629 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Experimental study of the influence of thawing permafrost on the chemical properties of sea water Experimental study of the influence of thawing permafrost on the chemical properties of sea water Pogojeva M Pogojeva M Yakushev E Yakushev E Ilinskaya A Ilinskaya A Polukhin A Polukhin A Braaten H -F Braaten H -F Kristiansen T Kristiansen T State Oceanographic Institute ru State Oceanographic Institute ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Norwegian Institute for Water Research ru Norwegian Institute for Water Research ru Norwegian Institute for Water Research ru Norwegian Institute for Water Research ru 18 5 1 6 10 11 2021 https://rjes.ru/en/nauka/article/46856/view

In a warming environment, permafrost thawing can play a significant role in the chemical composition of coastal waters in the Arctic region. It is a potential source of organic and inorganic forms of nutrients, as well as heavy metals and pollutants. To estimate the permafrost thawing influence on the chemical properties of the sea water, an experimental study was conducted as part of a Norwegian-Russian expedition to Svalbard 11--17 June 2017. Permafrost PF samples were collected at an abrasive cliff 10 km west of Longyearbyen, after that, the experiment was performed at the University of Svalbard laboratory. The experiment was focused on identifying the possible changes in concentrations of nutrients, carbonate system parameters, and pollutant composition related to permafrost thawing. During the experiment, the samples of permafrost were added to the seawater. Then, the solution was exposed to natural conditions outdoors for 24 hours while water samples from the solution were taken at specified time intervals. Data from the experiment allowed for estimating the rate and change in concentrations of chemical substances due to permafrost thawing. This study shows the importance of permafrost thawing in the coastal areas chemical regime, affecting the metals supply, ocean acidification, and nutrient inputs; therefore, coastal ecosystems could be exposed to new impacts of numerous stresses associated with global warming.

In a warming environment, permafrost thawing can play a significant role in the chemical composition of coastal waters in the Arctic region. It is a potential source of organic and inorganic forms of nutrients, as well as heavy metals and pollutants. To estimate the permafrost thawing influence on the chemical properties of the sea water, an experimental study was conducted as part of a Norwegian-Russian expedition to Svalbard 11--17 June 2017. Permafrost PF samples were collected at an abrasive cliff 10 km west of Longyearbyen, after that, the experiment was performed at the University of Svalbard laboratory. The experiment was focused on identifying the possible changes in concentrations of nutrients, carbonate system parameters, and pollutant composition related to permafrost thawing. During the experiment, the samples of permafrost were added to the seawater. Then, the solution was exposed to natural conditions outdoors for 24 hours while water samples from the solution were taken at specified time intervals. Data from the experiment allowed for estimating the rate and change in concentrations of chemical substances due to permafrost thawing. This study shows the importance of permafrost thawing in the coastal areas chemical regime, affecting the metals supply, ocean acidification, and nutrient inputs; therefore, coastal ecosystems could be exposed to new impacts of numerous stresses associated with global warming.

 Permafrost thawing sea water biogeochemistry acidification pollution Permafrost thawing sea water biogeochemistry acidification pollution

AMAP, Snow, Water, Ice and Permafrost in the Arctic SWIPA 2017. Arctic Monitoring and Assessment Programme - Oslo, Norway: AMAP., 2017. - 269 pp. AMAP, Snow, Water, Ice and Permafrost in the Arctic SWIPA 2017. Arctic Monitoring and Assessment Programme - Oslo, Norway: AMAP., 2017. - 269 pp. Braaten, H. F. V., de Wit, H. A., Harman, C., et al. Effects of sample preservation and storage on mercury speciation in natural stream water, // International Journal of Environmental Analytical Chemistry, 2014. - v. 94 - p. 381. Braaten, H. F. V., de Wit, H. A., Harman, C., et al. Effects of sample preservation and storage on mercury speciation in natural stream water, // International Journal of Environmental Analytical Chemistry, 2014. - v. 94 - p. 381. Dickson, A. G., Sabine, C. L., Christian, J. R. Guide to Best Practices for the Ocean CO 515 2 Measurements, // PICES Special Publication, 2007. - v. 3 - p. 381. Dickson, A. G., Sabine, C. L., Christian, J. R. Guide to Best Practices for the Ocean CO 515 2 Measurements, // PICES Special Publication, 2007. - v. 3 - p. 381. IPCC, Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change Core Writing Team, R. K. Pachauri and L. A. Meyer, eds. - Geneva, Switzerland: IPCC., 2014. - 151 pp. IPCC, Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change Core Writing Team, R. K. Pachauri and L. A. Meyer, eds. - Geneva, Switzerland: IPCC., 2014. - 151 pp. Grashoff, K., Kremling, K., Ehrhard, M. Methods of Seawater Analysis, 3rd completely revised and extended edition - Weinheim-New York-Chichester-Brisbane-Singapore-Toronto: WILEY-VCH Verlag GmbH., 1999. - 632 pp. Grashoff, K., Kremling, K., Ehrhard, M. Methods of Seawater Analysis, 3rd completely revised and extended edition - Weinheim-New York-Chichester-Brisbane-Singapore-Toronto: WILEY-VCH Verlag GmbH., 1999. - 632 pp. Holmes, R. M., McClelland, J. W., et al. Seasonal and annual fluxes of nutrients and organic matter from large rivers to the Arctic Ocean and surrounding seas, // Estuaries and Coasts, 2012. - v. 35 - no. 2 - p. 369. Holmes, R. M., McClelland, J. W., et al. Seasonal and annual fluxes of nutrients and organic matter from large rivers to the Arctic Ocean and surrounding seas, // Estuaries and Coasts, 2012. - v. 35 - no. 2 - p. 369. Hydrometeoizdat, Rukovodstvo po Khimicheskomu Analizu Morskikh Vod - St. Petersburg: Hydrometeoizdat., 1993. - 129 pp. Hydrometeoizdat, Rukovodstvo po Khimicheskomu Analizu Morskikh Vod - St. Petersburg: Hydrometeoizdat., 1993. - 129 pp. Kanakidou, M., et al. Past, present, and future atmospheric nitrogen deposition, // Journal of the Atmospheric Sciences, 2016. - v. 73 - no. 5 - p. 2039. Kanakidou, M., et al. Past, present, and future atmospheric nitrogen deposition, // Journal of the Atmospheric Sciences, 2016. - v. 73 - no. 5 - p. 2039. Karlsson, J., Bergstrom, A.-K., Bystrom, P., et al. Terrestrial organic matter input suppresses biomass production in lake ecosystems, // Ecology, 2015. - v. 96 - p. 2870. Karlsson, J., Bergstrom, A.-K., Bystrom, P., et al. Terrestrial organic matter input suppresses biomass production in lake ecosystems, // Ecology, 2015. - v. 96 - p. 2870. Mahowald, N., et al. Global distribution of atmospheric phosphorus sources, concentrations and deposition rates, and anthropogenic impacts, // Global Biogeochemical Cycles, 2008. - v. 22 - no. 4 - p. 1. Mahowald, N., et al. Global distribution of atmospheric phosphorus sources, concentrations and deposition rates, and anthropogenic impacts, // Global Biogeochemical Cycles, 2008. - v. 22 - no. 4 - p. 1. Semiletov, I., et al. 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, 2013. - v. 10 - p. 5977. Semiletov, I., et al. 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, 2013. - v. 10 - p. 5977. Vonk, J. E., et al. Activation of old carbon by erosion of coastal and subsea permafrost in Arctic Siberia, // Nature, 2012. - v. 489 - no. 7414 - p. 137. Vonk, J. E., et al. Activation of old carbon by erosion of coastal and subsea permafrost in Arctic Siberia, // Nature, 2012. - v. 489 - no. 7414 - p. 137.