Multidecadal variability of summer temperature over Romania and its relation with Atlantic Multidecadal Oscillation

We investigate the multidecadal variability of summer temperature over Romania as measured at 14 meteorological stations with long-term observational records. The dominant pattern of summer temperature variability has a monopolar structure and shows pronounced multidecadal variations. A correlation...

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Bibliographic Details
Published in:Theoretical and applied climatology 2013-07, Vol.113 (1-2), p.305-315
Main Authors: Ionita, Monica, Rimbu, Norel, Chelcea, Silvia, Patrut, Simona
Format: Article
Language:English
Subjects:
Analysis
Aquatic Pollution
Atmospheric circulation
Atmospheric Protection/Air Quality Control/Air Pollution
Atmospheric Sciences
Climatology
Climatology. Bioclimatology. Climate change
Correlation analysis
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Exact sciences and technology
External geophysics
Marine
Meteorology
Original Paper
Oscillators
Sea surface temperature
Summer
Temperature effects
Waste Water Technology
Water Management
Water Pollution Control
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Summary:We investigate the multidecadal variability of summer temperature over Romania as measured at 14 meteorological stations with long-term observational records. The dominant pattern of summer temperature variability has a monopolar structure and shows pronounced multidecadal variations. A correlation analysis reveals that these multidecadal variations are related with multidecadal variations in the frequency of four daily atmospheric circulation patterns from the North Atlantic region. It is found that on multidecadal time scales, negative summer mean temperature (TT) anomalies are associated with positive sea level pressure (SLP) anomalies centered over the northern part of the Atlantic Ocean and Scandinavia and negative SLP anomalies centered over the northern part of Africa. It is speculated that a possible cause of multidecadal fluctuations in the frequency of these four patterns are the sea surface temperature (SST) anomalies associated to the Atlantic Multidecadal Oscillation (AMO). These results have implications for predicting the evolution of summer temperature over Romania on multidecadal time scales.
ISSN:0177-798X
1434-4483
DOI:10.1007/s00704-012-0786-8