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ASSESSMENT OF HAZARDS IN THE BALTIC SEA ECOSYSTEM IN THE FUTURE CLIMATE
Abstract
The aim of this study is to assess the impact of climate change on the frequency and magnitude of marine hazards (extreme) events. The study was carried out for the Baltic Sea, which is under increasing pressure of maritime activities and becomes more vulnerable to climatic effects due to declining seasonal ice cover. Estimates of extreme events are derived from the current global and regional hydrodynamic climate models that have been used to define the marine boundary conditions, atmospheric and riverine forcing for the Baltic Sea in a modern and future climate. The frequency of occurrence of extreme events in the modern and future climate has been assessed for indicators identified by HELCOM and describing the ecological status of the Baltic Sea. These indicators include: 1) the surface winter concentration of nutrients, 2) chlorophyll-a concentration, 3) duration and area covered by hypoxic and anoxic zones in deep layers. Additionally the temperature of the photic layer is considered as the main indicator which determines the phytoplankton functioning. Model calculations using the St. Petersburg Baltic Eutrophication Model (SPBEM) were performed for the three climatic periods: the current climate - 1970-2010, and two periods to future climate - 2011-2050 and 2051-2090. Comparison of the calculated probabilities for the different areas of the Baltic Sea in the anomalies of the average winter temperature showed that the frequency of occurrence of extremely warm winter conditions in future climate will increase compared to the current climate. The probability of occurrence of extreme values of hypoxic areas in the future climate will decline. However, the area occupied by the hypoxia will increase, which apparently is due to a decrease in the winter mixing depth with climate warming. The frequency of occurrence of extreme blue-green algae blooms in the future climate will increase in the Gulf of Bothnia and decline in the Bornholm and Arkona basins.
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IPCC, 2014: 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.)]. IPCC, Geneva, Switzerland, 151 pp.
Meteorological Events in Site Evaluation for Nuclear Power Plants. Safety Guide. IAEA Safety Standards Series, No. NS-G-3.4.Vienna, IAEA, 2003. 34p.
Ryabchenko V., Karlin L., Isaev A., Vankevich R., Eremina T., Molchanov M., Savchuk O., Model estimates of the eutrophication of the Baltic Sea in the contemporary and future climate, Oceanology (English translation), vol. 56, No. 1, pp 36–45, 2016. DOI: 10.1134/S0001437016010161.
Neelov I., Eremina T., Isaev A., Ryabchenko V., Savchuk O., Vankevich R., A simulation of the Gulf of Finland ecosystem with 3-D model, Proceedings of the Estonian Academy of Science. Biology.Ecology, vol. 52, pp 347-359, 2003.
Savchuk O.P., Nutrient biogeochemical cycles in the Gulf of Riga: scaling up field studies with a mathematical model, J. Mar. Sys., 32, pp 235–280, 2002.
Döscher R., Willén U., Jones C., Rutgersson A., Meier M. H.E., Hansson U., Graham L. Ph., The development of the regional coupled ocean-atmosphere model RCAO, Boreal Environ. Res., 7, pp 183–192, 2002.
Jungclaus J.H., Botzet M., Haak H., Keenlyside N., Luo J.J., Latif M., Marotzke J., Mikolajewicz U., Roeckner E., Ocean circulation and tropical variability in the coupled ECHAM5/MPI-OM, Journal of Climate, 19, pp 3952–3972, 2006.
Roeckner E., Brokopf R., Esch M., Giorgetta M., Hagemann S., Kornblueh L., Manzini E., Schlese U., Schulzweida U., Sensitivity of simulated climate to horizontal and vertical resolution in the ECHAM5 atmosphere model, J. of Climate, vol. 19, pp 3771–3791, 2006.
Solomon S., Qin D., Manning M., Chen Z., Marquis M., Averyt K.B., Tignor M., and Miller H.L. Contribution of Working Group I to the Fourth Assessment, Report of the Intergovernmental Panel on Climate Change. 2007. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 996 pp.
Stålnacke P., Grimvall A., Sundblad K., Tonderski A., Estimation of riverine loads of nitrogen and phosphorus to the Baltic Sea 1970–1993, Environ. Monit. Assess., 58, pp 173–200, 1999.
Meier H. E. M., Hordoir R., Andersson H. C., Dieterich C., Eilola K., Gustafsson B. G., Höglund A., Schimanke S., Modeling the combined impact of changing climate and changing nutrient loads on the Baltic Sea environment in an ensemble of transient simulations for 1961–2099, Climate Dynamics, 39, pp 2421-2441, 2012. DOI: 10.1007/s00382-012-1339-7.
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