Analysis of monthly, winter, and annual temperatures in Zagreb, Croatia, from 1864 to 2010: the 7.7-year cycle and the North Atlantic Oscillation

Long instrumental records of meteorological variables such as temperature and precipitation are very useful for studying regional climate in the past, present, and future. They can also be useful for understanding the influence of large-scale atmospheric circulation processes on the regional climate...

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Bibliographic Details
Published in:Theoretical and applied climatology 2016-02, Vol.123 (3-4), p.733-739
Main Authors: Sen, Asok K, Ogrin, Darko
Format: Article
Language:English
Subjects:
Analysis
Aquatic Pollution
Atmospheric circulation
Atmospheric Protection/Air Quality Control/Air Pollution
Atmospheric Sciences
climate
Climate cycles
Climatology
Earth and Environmental Science
Earth Sciences
geophysics
History
magnetism
Marine
meteorological data
meteorological parameters
North Atlantic Oscillation
Original Paper
periodicity
Precipitation (Meteorology)
Temperature
time series analysis
Waste Water Technology
Water Management
Water Pollution Control
wavelet
Winter
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Summary:Long instrumental records of meteorological variables such as temperature and precipitation are very useful for studying regional climate in the past, present, and future. They can also be useful for understanding the influence of large-scale atmospheric circulation processes on the regional climate. This paper investigates the monthly, winter, and annual temperature time series obtained from the instrumental records in Zagreb, Croatia, for the period 1864–2010. Using wavelet analysis, the dominant modes of variability in these temperature series are identified, and the time intervals over which these modes may persist are delineated. The results reveal that all three temperature records exhibit low-frequency variability with a dominant periodicity at around 7.7 years. The 7.7-year cycle has also been observed in the temperature data recorded at several other stations in Europe, especially in Northern and Western Europe, and may be linked to the North Atlantic Oscillation (NAO) and/or solar/geomagnetic activity.
ISSN:0177-798X
1434-4483
DOI:10.1007/s00704-015-1388-z