Temperature variability of the Iberian Range since 1602 inferred from tree-ring records
E. Tejedor1,2,3, M. A. Saz1,2, J. M. Cuadrat1,2, J. Esper3, and M. de Luis1,21University of Zaragoza, 50009 Zaragoza, Spain 2Environmental Sciences Institute of the University of Zaragoza 3Department of Geography, Johannes Gutenberg University, 55099 Mainz, Germany
Received: 18 Jan 2016 – Accepted: 01 Feb 2016 – Published: 02 Feb 2016
Abstract. Tree-rings are an important proxy to understand the natural drivers of climate variability in the Mediterranean basin and hence to improve future climate scenarios in a vulnerable region. Here, we compile 316 tree-ring width series from 11 conifer sites in the western Iberian Range. We apply a new standardization method based on the trunk basal area instead of the tree cambial age to develop a regional chronology which preserves high to low frequency variability. A new reconstruction for the 1602–2012 period correlates at −0.78 with observational September temperatures with a cumulative mean of the 21 previous months over the 1945–2012 calibration period. The new IR2Tmax reconstruction is spatially representative for the Iberian Peninsula and captures the full range of past Iberian Range temperature variability. Reconstructed long-term temperature variations match reasonably well with solar irradiance changes since warm and cold phases correspond with high and low solar activity, respectively. In addition, some annual temperatures downturns coincide with volcanic eruptions with a three year lag.
Tejedor, E., Saz, M. A., Cuadrat, J. M., Esper, J., and de Luis, M.: Temperature variability of the Iberian Range since 1602 inferred from tree-ring records, Clim. Past Discuss., doi:10.5194/cp-2016-9, in review, 2016.