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Title: Spatial patterns of eastern mediterranean climate influence on tree growth
Authors: Touchan, Ramzi
Anchukaitis, Kevin J
Shishov, Vladimir V
Sivrikaya, Fatih
Attieh, Jihad 
Ketmen, Muzaffer
Stephan, Jean
Mitsopoulos, Ioannis
Christou, Andrea
Meko, David
Affiliations: Department of Biology 
Keywords: Correlation analysis
Expressed population signal
General circulation models
Subjects: Cluster analysis
Issue Date: 2014
Part of: Holocene journal
Volume: 24
Issue: 4
Start page: 381
End page: 392
The first large-scale network of 79 tree-ring chronologies in the Eastern Mediterranean and Near East (EMNE; 33°N–42°N, 21°E–43°E) is described and analyzed to identify the seasonal climatic signal in indices of annual ring width. Correlation analysis and cluster analysis are applied to tree-ring data and gridded climate data to assess the climate signal embedded in the network in preparation for climate field reconstructions and formal proxy/model intercomparison experiments. The lengths of the 79 combined chronologies range from 89 to 990 years. The monthly correlations and partial correlations reveal a pervasive positive association with May, June, and sometimes July precipitation, positive correlations with winter and spring (December through April) temperatures, and negative relationships with May through July temperature, although as expected, there are site-to-site exceptions to these general patterns. Cluster analysis suggests three groups of sites based on their association with climate. The chronologies for the EMNE have coherent seasonal precipitation and temperature signals across a fairly broad geographical domain. The predominant signal is a positive growth response to May–June precipitation. Collectively, the findings suggest that the network can be exploited to develop season-specific field reconstructions of precipitation and drought history in the EMNE.
DOI: 10.1177/0959683613518594
Open URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Biology

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