Oxygen isotopes in tree rings record variation in precipitation δ¹⁸O and amount effects in the south of Mexico.

ABSTRACT: [1] Natural archives of oxygen isotopes in precipitation may be used to study changes in the hydrological cycle in the tropics, but their interpretation is not straightforward. We studied to which degree tree rings of Mimosa acantholoba from southern Mexico record variation in isotopic composition of precipitation and which climatic processes influence oxygen isotopes in tree rings (δ¹⁸O_tr). Interannual variation in δ¹⁸O_tr was highly synchronized between trees and closely related to isotopic composition of rain measured at San Salvador, 710 km to the southwest. Correlations with δ¹³C, growth, or local climate variables (temperature, cloud cover, vapor pressure deficit (VPD)) were relatively low, indicating w

SUBMITTER: Brienen RJ 

PROVIDER: S-EPMC4508921 | biostudies-literature | 2013 Dec

REPOSITORIES: biostudies-literature