Relationship of extreme dry spells in Eastern Mediterranean with large-scale circulation

The relationship of prolonged dry spells in Eastern Mediterranean with large-scale surface and upper circulation is investigated on seasonal basis with the aid of the Singular-Value Decomposition Analysis (SVDA) for the period 1958–2000. The study was based on daily precipitation data of 56 stations...

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Bibliographic Details
Published in:Theoretical and applied climatology 2010-03, Vol.100 (1-2), p.137-151
Main Authors: Oikonomou, C., Flocas, H. A., Hatzaki, M., Nisantzi, A., Asimakopoulos, D. N.
Format: Article
Language:English
Subjects:
Analysis
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Atmospheric Sciences
Circulation
Climate
Climatology
Correlation analysis
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Exact sciences and technology
External geophysics
Hydrologic data
Meteorology
Original Paper
Rain and rainfall
Seasons
Surface circulation
Waste Water Technology
Water in the atmosphere (humidity, clouds, evaporation, precipitation)
Water Management
Water Pollution Control
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Summary:The relationship of prolonged dry spells in Eastern Mediterranean with large-scale surface and upper circulation is investigated on seasonal basis with the aid of the Singular-Value Decomposition Analysis (SVDA) for the period 1958–2000. The study was based on daily precipitation data of 56 stations, evenly distributed over Eastern Mediterranean region. Extreme dry spells are defined using the CDD index (maximum number of consecutive dry days). It was found that teleconnection patterns centered over Northern Atlantic and northern Europe seem to affect the duration of the longest dry spells over the Eastern Mediterranean, while surface synoptic scale systems in Northern Africa play a substantial role. The SVDA results compare well with the corresponding results of Canonical Correlation Analysis (CCA), mainly for the surface circulation during winter and summer.
ISSN:0177-798X
1434-4483
DOI:10.1007/s00704-009-0171-4