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The variability of winter high temperature extremes in Romania and its relationship with large-scale atmospheric circulation

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Abstract

The frequency variability of extreme high winter temperature as recorded at 85 meteorological stations from Romania during 1962–2010 period and its relationship with large-scale atmospheric circulation was investigated. An Empirical Orthogonal Function analysis reveals that large part of the extreme temperature frequency variability is common to all stations suggesting a strong influence of large-scale circulation anomalies. The North Atlantic Oscillation, West Pacific, East Atlantic, and Scandinavian patterns are related with extreme temperature frequency variability. We show that the East Atlantic Oscillation controls a significant part of interannual extreme high temperature variability over Romania via advection of warm air from the west. In addition, a strong relationship between blocking activity and frequency of extreme high temperature events in Romania was found. High blocking activity in the (20°W-70°E) sector is related with relatively strong advection of cold air over the country during winter. On the other hand, low blocking activity in the same sector is related with weak advection of relatively cold air in the region. Moreover, the blocking frequency in this sector is modulated mainly by the East Atlantic Oscillation.

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References

  • Andrade C, Leite S, Santos JA (2012) Temperature extremes in Europe: overview of their driving atmospheric patterns. Nat Hazards Earth Syst Sci 12:1671–1691. doi:10.5194/nhess-12-1671-2012

    Article  Google Scholar 

  • Andrei S, Roman I (2012) Severe weather phenomena in southern Romania in association with blocking circulation over Euro-Atlantic area during the cold season. Rom Rep Phys 64(1):246–262

    Google Scholar 

  • Barnston AG, Livezey RE (1987) Classification, seasonality and persistence of low-frequency atmospheric circulation patterns. Mon Weather Rev 115:1083–1126

    Article  Google Scholar 

  • Bartholy J, Pongracz R (2007) Regional analysis of extreme temperature and precipitation indices for the Carpathian Basin from 1946 to 2001. Global Planet Chang 57:83–95

    Article  Google Scholar 

  • Birsan MV, Dumitrescu A (2014) Snow variability in Romania in connection to large-scale atmospheric circulation. Int J Climatol 34:134–144. doi:10.1002/joc.3671

    Article  Google Scholar 

  • Bojariu R, Paliu D (2001) North Atlantic Oscillation projection on Romanian climate fluctuations in the cold season. In: Brunet M, Lopez D (eds) Detecting and modelling regional climate change and associated impacts. Springer, Berlin, pp 345–356

    Chapter  Google Scholar 

  • Busuioc A, Dumitrescu A, Soare E, Orzan A (2007) Summer anomalies in 2007 in the context of extremely hot and dry summers in Romania. Rom J Meteorol 9:1–2

    Article  Google Scholar 

  • Busuioc A, Caian M, Cheval S, Bojariu R, Boroneant C, Baciu M, Dumitrescu A (2010) Variability and climate change in Romania (in Romanian). Pro Universitaria, Bucharest

    Google Scholar 

  • Comas-Bru L, McDermott F (2013) Impacts of the EA and SCA patterns on the European twentieth century NAO—winter climate relationship. Quart J Roy Meteorol Soc 140(679B):354–363. doi:10.1002/qi2158

    Google Scholar 

  • Croitoru AE, Piticar A (2012) Changes in daily extreme temperatures in the extra-Carpathians regions of Romania. Int J Climatol 33:1987–2001. doi:10.1002/joc.3567

    Article  Google Scholar 

  • Ionita M, Rimbu N, Chelcea S, Patrut S (2013) Multidecadal variability of summer temperature over Romania and its relation with Atlantic Multidecadal Oscillation. Theor Appl Climatol 113:305–315. doi:10.1007/s00704-012-0786-8

    Article  Google Scholar 

  • Kalnay E, Kanamitsu M, Kistler R, Collins W, Deaven D, Gandin L, Iredell M, Saha S, White G, Woollen J, Zhu Y, Leetmaa A, Reynolds R, Chelliah M, Ebisuzaki W, Higgins W, Janowiak J, Mo KC, Ropelewski C, Wang J, Jenne R, Joseph D (1996) The NCEP/NCAR 40-year reanalysis project. Bull Am Meteorol Soc 77:437–470

    Article  Google Scholar 

  • Kistler R, Kalnay E, Collins W, Saha S, White G, Woollen J, Chelliah M, Ebisuzaki W, Kanamitsu M, Kousky V, van den Dool H, Jenne R, Fiorino M (2001) The NCEP-NCAR 50-year reanalysis: monthly means CD-ROM and documentation. Bull Am Meteorol Soc 82:247–267

    Article  Google Scholar 

  • Klein Tank AMG, Können GP (2003) Trends in indices of daily temperature and precipitation extremes in Europe, 1946–99. J Clim 16((22):3665–3680. doi:10.1175/1520-0442(2003)016<3665:TIIODT>2.0.CO;2

    Article  Google Scholar 

  • Klein Tank AMG, Wijngaard JB, Können GP, Böhm R, Demarée G, Gocheva A, Mileta M, Pashiardis S, Hejkrlik L, Kern-Hansen C, Heino R, Bessemoulin P, Müller-Westermeier G, Tzanakou M, Szalai S, Pálsdóttir T, Fitzgerald D, Rubin S, Capaldo M, Maugeri M et al (2002) Daily dataset of 20th-century surface air temperature and precipitation series for the European Climate Assessment. Int J Climatol 22(12):1441–1453

  • Knežević S, Tošić I, Pejanović G (2013) The influence of the East Atlantic Oscillation to climate indices based on daily minimum temperatures in Serbia. Theor Appl Climatol. doi:10.1007/s00704-013-0959-0

    Google Scholar 

  • Moberg A, Jones PD, Lister D, Walther A, Brunet M, Jacobeit J, Alexander KV, Della-Marta PM, Luterbacher J, Yiou P, Chen D, Klein Tank AMG, Saladié O, Sigró J, Aguilar E, Alexandersson H, Almarza C, Auer I, Barriendos M, Begert M, Bergström H, Böhm R, Butler CJ, Caesar J, Drebs A, Founda D, Gerstengarbe F-W, Micela G, Maugeri M, Österle H, Pandzic K, Petrakis M, Srnec L, Tolasz R, Tuomenvirta H, Werner PC, Linderholm H, Philipp A, Wanner H, Xoplaki E (2006) Indices for daily temperature and precipitation extremes in Europe analyzed for the period 1901–2000. J Geophys Res 111(D22), D22106. doi:10.1029/2006J007103

    Article  Google Scholar 

  • National Meteorological Administration (2008) Climate of Romania (in Romanian). Romanian Academy, Bucharest

    Google Scholar 

  • Rimbu N, Lohmann G (2011) Winter and summer blocking variability in the North Atlantic region: evidence from long-term observational and proxy data from southwestern Greenland. Clim Past 7:543–555. doi:10.5194/cp-7-543-2011

    Article  Google Scholar 

  • Rimbu N, Onac BP, Racovita G (2011) Large scale anomaly patterns associated to temperature variability inside Scarisoara Ice Cave. Int J Climatol 32(10):1495–1502. doi:10.1002/joc.2369

    Article  Google Scholar 

  • Scherrer SC, Croci-Maspoli M, Schwierz C, Appenzeller C (2006) Two dimensional indices of atmospheric blocking and their statistical relationship with winter climate patterns in the Euro-Atlantic Region. Int J Climatol 26(2):233–249

    Article  Google Scholar 

  • Shabbar A, Huang J, Higuchi K (2001) The relationship between the wintertime North Atlantic oscillation and blocking episodes in the North Atlantic. Int J Climatol 21:355–369. doi:10.1002/joc 612

    Article  Google Scholar 

  • Szentimrey T (1997) Statistical procedure for joint homogenization of climatic time series. In Proceedings for the Seminar for Homogenization of Surface Climatological Data, Hungarian Meteorological service, Budapest pp 47–62

  • Tibaldi S, Molteni F (1990) On the operational predictability of blocking. Tellus 42A:343–365

    Article  Google Scholar 

  • Tomozeiu R, Busuioc A, Stefan S (2002) Changes in seasonal mean of maximum air temperature in Romania and their connection with large-scale circulation. Int J Climatol 22:1181–1196

    Article  Google Scholar 

  • Unkaševic M, Tošić I (2013) Trends in temperature indices over Serbia: relationships to large-scale circulation patterns. Int J Climatol 33:3152–3161. doi:10.1002/joc.3652

    Article  Google Scholar 

  • vonStorch H, Zwiers FW (1999) Statistical analysis in climate research. Cambridge University Press, London

    Google Scholar 

  • Wanner H, Broennimann S, Casty C, Gialistras D, Schmutz C, Stephenson D, Xoplaki E (2001) North Atlantic Oscillation—concepts and studies. Surv Geophys 22(4):321–381

    Article  Google Scholar 

  • Wilks DS (2006) Statistical methods in the atmospheric sciences. Academic, Amsterdam

    Google Scholar 

  • WMO (1966) Climatic change. Tech Note No 79. WMO, Geneva

    Google Scholar 

Download references

Acknowledgments

This paper benefited significantly from constructive suggestions from the editor and two anonymous reviewers. This study was funded by the Executive Agency for Higher Education, Research Development and Innovation Funding (UEFISCDI) through the research project CLIMYDEX “Changes in climate extremes and associated impact in hydrological events in Romania,” cod PNII-PCCE-ID-2011-2-0073.

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  1. Faculty of Physics, University of Bucharest, P.O.BOX: MG - 11, Magurele, Bucharest, 077125, Romania

    N. Rimbu, S. Stefan & C. Necula

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  1. N. Rimbu
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  2. S. Stefan
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  3. C. Necula
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Correspondence to S. Stefan.

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Rimbu, N., Stefan, S. & Necula, C. The variability of winter high temperature extremes in Romania and its relationship with large-scale atmospheric circulation. Theor Appl Climatol 121, 121–130 (2015). https://doi.org/10.1007/s00704-014-1219-7

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  • DOI: https://doi.org/10.1007/s00704-014-1219-7

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