Abstract

CERANO-PAREDES, Julián et al. Reconstruction of winter-spring precipitation with annual rings of Pinus douglasiana in the Sierra de Manantlán Biosphere Reserve, Jalisco. Rev. Chapingo ser. cienc. for. ambient [online]. 2013, vol.19, n.3, pp.413-423. ISSN 2007-4018.  https://doi.org/10.5154/r.rchscfa.2013.02.007.

Winter-spring precipitation in the Sierra de Manantlán Biosphere Reserve (SMBR) in Jalisco, Mexico, was reconstructed for a 219-year period (1792-2010) using the annual rings of Pinus douglasiana (Mtz.) as proxy. The drought of the mid-twentieth century (1941-1963, 22 years) was the most severe of the study period. The multivariate El Niño Southern Oscillation index (MEI) (1959-2010) and the tree-ring width index of P. douglasiana showed significant correlation (r = 0.4542; P < 0.05) for the months of January-June, with higher correlation for the months of January (r = 0.4337; P < 0.0001) and March (r = 0.4310; P < 0.0001). ENSO teleconnections in the region vary over time; from January ño events are associated with higher than average rainfall, while La Niña events show the opposite.

Keywords : Dendrochronology; rainfall; drought; frequency.

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