Oxygen isotopes in tree rings are a good proxy for Amazon precipitation and El Niño-Southern Oscillation variability

@article{Brienen2012OxygenII,
  title={Oxygen isotopes in tree rings are a good proxy for Amazon precipitation and El Ni{\~n}o-Southern Oscillation variability},
  author={Roel J. W. Brienen and G Helle and Thijs L. Pons and Jean-Loup Guyot and Manuel Gloor},
  journal={Proceedings of the National Academy of Sciences},
  year={2012},
  volume={109},
  pages={16957 - 16962}
}
We present a unique proxy for the reconstruction of variation in precipitation over the Amazon: oxygen isotope ratios in annual rings in tropical cedar (Cedrela odorata). A century-long record from northern Bolivia shows that tree rings preserve the signal of oxygen isotopes in precipitation during the wet season, with weaker influences of temperature and vapor pressure. Tree ring δ18O correlates strongly with δ18O in precipitation from distant stations in the center and west of the basin, and… Expand
Oxygen isotopes in tree rings record variation in precipitation δ18O and amount effects in the south of Mexico
TLDR
The results confirm that processes influencing climate-isotope relations differ between sites located, e.g., in the western Amazon versus coastal Mexico, and that tree ring isotope records can help in disentangling the processes influencing precipitation δ18O. Expand
HYDRO-CLIMATIC VARIABILITY IN SOUTHERN ECUADOR REFLECTED BY TREE-RING OXYGEN ISOTOPES
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What drives interannual variation in tree ring oxygen isotopes in the Amazon
Oxygen isotope ratios in tree rings (δ18OTR) from northern Bolivia record local precipitation δ18O and correlate strongly with Amazon basin-wide rainfall. While this is encouraging evidence thatExpand
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Patterns of moisture source and climate variability in the southeastern United States: a four-century seasonally resolved tree-ring oxygen-isotope record
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Rainfall and river levels in the Amazon are associated with significant precipitation anomalies of opposite sign in temperate North and South America, which is the dominant mode of precipitationExpand
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The Amazon basin is a global center of hydroclimatic variability and biodiversity, but there are only eight instrumental rainfall stations with continuous records longer than 80 years in the entireExpand
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Abstract. We investigate the annual variability of δ18O tree ring records from sites distributed all over Europe covering the last 400 years. An Empirical Orthogonal Function (EOF) analysis revealsExpand
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