THE NORTH ATLANTIC OSCILLATION (NAO) AND THE WATER TEMPERATURE OF THE SAVA RIVER IN SERBIA
Keywords:North Atlantic Oscillation, water temperature, river, Sava, Serbia
The data on the water temperature of the Sava in Serbia (hydrological stations Šabac and Belgrade, period 1961–2015) were used for the research, as well as the data on the surface air temperature. The temperature trends were determined and the significance (at p≤0.05 and p≤0.01) was established on the basis of the t-test. The Pearson correlation coefficient (R) was used for the calculation of the correlation. Increasing trends of the water temperature of the Sava were recorded in all cases at both stations. However, in the case of the HS Šabac, the trends for 6 months (February–April and September–November) were not statistically significant. In the case of the HS Belgrade, all the calculations (except for April) showed statistically significant increasing trends, which can be explained by anthropogenic influence. High level of correlation between the surface air temperature and the water temperature was also determined. In this research, the lowest values of R were recorded for October (0.561 for Belgrade), and on the seasonal level, for autumn (0.625 for Šabac). The research on the correlation between the water temperature of the Sava River and the NAO index showed the highest values of R for January (0.512 for HS Šabac and 0.528 for HS Belgrade). On the seasonal level, the highest values were recorded for winter (0.422 for HS Šabac and 0.432 for HS Belgrade).
Basarin, B., Lukić, T., Pavić, D., & Wilby, R. L. (2016). Trends and multi-annual variability of water temperatures in the river Danube, Serbia. Hydrological Processes, 30(18), 3315–3329. doi: http://dx.doi.org/10.1002/hyp.10863
Bonacci, O., Trninić, D., & Roje-Bonacci, T. (2008). Analysis of the Water Temperature Regime of the Danube and its Tributaries in Croatia. Hydrological Processes, 22(7), 1014–1021. doi: http://dx.doi.org/10.1002/hyp.6975
Ducić, V. D., Milenković, M. D., Milijašević, D. P., Vujačić, D. M., Bjeljac, Ž. N., Lović, S. I., Gajić, M. R., Andjelković, G. R., & Djordjević, A. D. (2015). Hiatus in global warming – The example of water temperature of the Danube River at Bogojevo Gauge (Serbia). Thermal Science, 19(Suppl. 2), S467–S476. doi: https://doi.org/10.2298/TSCI150430133D
IPCC (2013). Summary for Policymakers. In: T. F. Stocker, D. Qin, G.-K. Plattner, M. Tignor, S. K. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex, & P. M. Midgley (Eds.). Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Retrieved from https://www.ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_SPM_FINAL.pdf
Jovanović, G., Reljin, I.& Reljin, B. (2008).The influence of Arctic and North Atlantic Oscillation on precipitation regime in Serbia. IOP Conference Series: Earth and Environmental Science, 4(1), 012025. doi: https://doi.org/10.1088/1755-1307/4/1/012025
Lovász, G. (2012). Water temperatures of the Danube and Tisza rivers in Hungary. Hungarian Geographical Bulletin, 61(4), 317–325. Retrieved from http://www.core.hu/mtafki/konyvtar/kiadv/HunGeoBull2012/HunGeoBull_2012_4_317-325.pdf
Malinović-Milićević, S., Radovanović, M. M., Stanojević, G., & Milovanović, B. (2016).Recent changes in Serbian climate extreme indices from 1961 to 2010. Theoretical and Applied Climatiology, 124(3–4), 1089–1098. doi: https://doi.org/10.1007/s00704-015-1491-1
Milenković, M., Babić, V., Ducić, V., Krstić, M., & Lazić, B. (2016). The water temperature trends of the Sava river in Serbia. In R. V. Pantović & Z. S. Marković, Proceedings XXIV International Conference Ecological Truth, Eco-ist ’16 (792–798). Bor: University of Belgrade, Technical Faculty.
Pavlović-Berdon, N. (2012). The Impact of Arctic and North Atlantic Oscillation on Temperature and Precipitation Anomalies in Serbia. Geographica Pannonica, 16(2) 44–55. Retrieved from http://www.dgt.uns.ac.rs/pannonica/papers/volume16_2_2.pdf
Tošić, I., Hrnjak, I., Gavrilov, M. B., Unkašević, M., Marković, S. B., & Lukić, T. (2013). Annual and seasonal variability of precipitation in Vojvodina, Serbia. Theoretical and Applied Climatology, 117(1–2), 331–341. doi: https://doi.org/10.1007/s00704-013-1007-9
Unkašević, M., Tošić, I. (2013). Trends in temperature indices over Serbia: relationships tolarge-scale circulation patterns. International Journal of Climatology, 33(15), 3152–3161. doi: https://doi.org/10.1002/joc.3652
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