[Beltaos, S. (1997). Onset of river ice breakup. Cold Region Sci. Technol.,25, 183–196.10.1016/S0165-232X(96)00011-0]Search in Google Scholar
[Beltaos, S., Burrell, B. C. (2003). Climatic change and river ice breakup. Can. J. Civil. Eng.,30 (1), 145–155.10.1139/l02-042]Search in Google Scholar
[Benson, B. J., Magnson, J. J, Jacob, R. L., Fuenger, S. L. (2000). Response of lake ice breakup in the Northern hemisphere to the 1976 interdecadal shift in the North Pacific. Verh. Internat. Verein Limnol.,27, 2770–2774.10.1080/03680770.1998.11898170]Search in Google Scholar
[Chen, D., Hellström, C. (1999). The influence of the North Atlantic Oscillation on the regional temperature variability in Sweden: Spatial and temporal variations. Tellus, 51A, 505–516.10.3402/tellusa.v51i4.14086]Search in Google Scholar
[Gebre, S., Boissy, T., Alfredsen, K. (2014). Sensitivity to climate change of the thermal structure and ice cover regime of three hydropower reservoirs J. Hydrol., 510 (3), 208–227.10.1016/j.jhydrol.2013.12.023]Search in Google Scholar
[Granskog, M., Kaartokallio, H., Kuosa, H., Thomas, D. N., Vainia, J. (2006). Sea ice in the Baltic Sea. Estuar. Coast. Shelf. Sci., 70, 145–160.10.1016/j.ecss.2006.06.001]Search in Google Scholar
[Hagen, E., Feistel, R. (2005). Climatic turning pints and regime shifts in the Baltic Sea region: The Baltic winter index (WIBIX) 1659–2002. Boreal Environ. Res.,10, 211–224.]Search in Google Scholar
[Hurrell, J. W., van Loon H. (1997). Decadal variations in climate associated with the North Atlantic Oscillation. Clim. Change,36, 301–326.10.1023/A:1005314315270]Search in Google Scholar
[Hodgkins, G. A., James, I. C., Huntington, T. G. (2002). Historical changes in lake ice-out dates as indicators of climate change in New England, 1850–2000. Int. J. Climatol.,22, 1819–1827.10.1002/joc.857]Search in Google Scholar
[Jevrejeva, S. (2001). Severity of winter seasons in the northern Baltic Sea between 1529–1990: Reconstruction and analysis. Clim. Res.,17, 55–62.10.3354/cr017055]Search in Google Scholar
[Johannessen, O. M., Bengtsson, L., Miles, M. W., Kuzmina, S. I., Semenov, V. A., Alekseev, G. A., Nagurnyi, A. P., Zakharov, V. F., Bobylev, L. P., Petterson, L. H., Hasselman, K., Cattle, H. P. (2004). Arctic climate change: Observed and modelled temperature and sea-ice variability. Tellus, 56A, 329–341.]Search in Google Scholar
[Klavins, M., Briede, A., Rodinov, V., Kokorite, I., Frisk, T. (2002). Long-term changes of the river runoff in Latvia. Boreal Environ. Res.,7, 447–456.]Search in Google Scholar
[Libiseller, C., Grimvall, A. (2002). Performance of partial Mann–Kendall tests for trend detection in presence of covariates. Environmetrics,13, 71–84.10.1002/env.507]Search in Google Scholar
[Laidre, K. L., Jorgensen, M. P. H. (2005). Arctic sea ice trends and narwhal vulnerability. Biol. Conserv., 121, 509–517.10.1016/j.biocon.2004.06.003]Search in Google Scholar
[Lind, L., Alfredsen, K., Kuglerová, L., Nilsson C. (2016). Hydrological and thermal controls of ice formation in 25 boreal stream reaches J. Hydrol., 540 (11), 797–811.10.1016/j.jhydrol.2016.06.053]Search in Google Scholar
[Loewe, P., Koslowski, G. (1998). The Western Baltic sea ice season in terms of a mass-related severity index 1879–1992 (II) spectral characteristics and association with the NAO, QBO, and solar cycle. Tellus, 50 (A), 219–241.10.3402/tellusa.v50i2.14522]Search in Google Scholar
[Lizuma, L., Klavins, M., Briede, A., Rodinovs, V. (2007). Long-term changes of air temperature in Latvia. In: Climate Change in Latvia. Ed. M. Klavins. UL Publishing House, Rīga, pp. 11–21.]Search in Google Scholar
[Magnuson, J. J., Robertson, D. M., Benson, B. J., Wynne, R. H., Livingstone, D. M., Arai, T., Assel, R. A., Barry, R. G., Card, V., Kuusisto, E., Granin, N. G., Prowse, T. D., Stewart, T. D., Vuglinski, V. S. (2000). Historical trends in lake and river ice cover in the Northern hemisphere. Science,289, 1743–1746.10.1126/science.289.5485.174310976066]Search in Google Scholar
[Marshall, J., Kushnir, Y., Battisti, D., Chang, P., Czaja, A., Dickson, R., Hurrell, J., McCartney, M., Saravanan, R., Visbeck, M. (2001). North Atlantic climate variability: Phenomena, impacts and mechanisms. Int. J. Climatol., 21, 1863–1898.10.1002/joc.693]Search in Google Scholar
[Morse, B., Hicks, F. (2005). Advances in river ice hydrology 1999–2003. Hydrol, Proc.,19 (1), 247–263.10.1002/hyp.5768]Search in Google Scholar
[Osborn, T. J., Briffa, K. R., Tett, S. F. B., Jones, P. D., Trigo, R. M. (1999). Evaluation of the North Atlantic Oscillation as simulated by a coupled climate model. Clim. Dynamics,15, 685–702.10.1007/s003820050310]Search in Google Scholar
[Paeth, H., Hense, A., Glowienka-Hense, R., Voss, R., Cubash, U. (1999). The North Atlantic Oscillation as an indicator for greenhouse-gas induced regional climate change. Clim. Dynamics, 15, 953–960.10.1007/s003820050324]Search in Google Scholar
[de Rham, L. P., Prowse, T. D., Bonsal, B. R. (2008). Temporal variations in river-ice break-up over the Mackenzie River Basin, Canada. J. Hydrol.,349, 441–454.10.1016/j.jhydrol.2007.11.018]Search in Google Scholar
[Robertson, D. M., Wynne, R. H., Chang, W. Y. B. (2000). Influence of El Nińo on lake and river ice cover in the Northern hemisphere from 1900 to 1995. Verh. Internat. Verein Limnol.,27, 2784–2788.10.1080/03680770.1998.11898172]Search in Google Scholar
[Sarauskiene, D., Jurgelenaite, A. (2008). Impact of climate change on river ice phenology in Lithuania. Environ. Res. Eng. Manag., 4 (46), 13–22.]Search in Google Scholar
[Saucier, F. J., Semeville, S., Prinsenberg, S., Roy, F., Smith, G., Gachon, P., Caya, D., Laprise, R. (2004). Modelling the sea ice-ocean seasonal cycle in Hudson Bay, Foxe basin and Hudson strait, Canada. Clim. Dynam., 23, 303–326.10.1007/s00382-004-0445-6]Search in Google Scholar
[Sooaar, J., Jaagus, J. (2007). Long-term changes in the sea ice regime in the Baltic Sea near the Estonian coast. Proc. Estonian. Acad. Sci. Eng., 13 (3), 189–200.]Search in Google Scholar
[Stakle, P. (1931). Hidrometriskie novērojumi Latvijā līdz 31.X1929 [hydrometric observations in Latvia until 31.10.1929]. Finanšu ministrijas Jūrniecības departaments. Rīga, 374 lpp. (in Latvian).]Search in Google Scholar
[Takįcs, K., Kern, Z. (2015). Multidecadal changes in the river ice regime of the lower course of the River Drava since AD 1875 J. Hydrol.,529 (3), 1890–1900.10.1016/j.jhydrol.2015.01.040]Search in Google Scholar
[Uvo, C. B. (2003). Analyses and regionalization of Northern Europe winter precipitation based on its relationship with North Atlantic Oscillations. Int. J. Climatol.,23, 1185–1194.10.1002/joc.930]Search in Google Scholar
[Yoo, J. C., D’Odorico, P. (2002). Trends and fluctuations in the dates of ice break-up of lakes and rivers in Northern Europe: the effect of the North Atlantic Oscillation. J. Hydrol.,268, 100–112.10.1016/S0022-1694(02)00161-0]Search in Google Scholar