A possible paleoclimatic ENSO indicator in the spatial variation of annual tree‐ring 14C

John L. Jirikowic; Robert M. Kalin

doi:10.1029/93GL00498

A possible paleoclimatic ENSO indicator in the spatial variation of annual tree‐ring ¹⁴C

John L. Jirikowic, Robert M. Kalin

Civil And Environmental Engineering

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Preliminary investigations show regional differences in atmospheric ¹⁴C activity archived in tree‐ring cellulose may reflect oceanic and atmospheric shifts associated with ENSO (El Niño‐Southern Oscillation) events. Much of the shared variation between sites in Washington and Arizona can be attributed to global forcings such as anthropogenic ¹⁴C‐depleted CO₂ emissions and modulation of ¹⁴C production. The contrasted residual variation between the Washington and Arizona data sets correlates with the annual Southern Oscillation Index (SOI) of the previous year. The spatial differences between Δ¹⁴C data sets may provide a proxy indicator of ENSO phenomenon.

Original language	English
Pages (from-to)	439-442
Number of pages	4
Journal	Geophysical Research Letters
Volume	20
Issue number	6
DOIs	https://doi.org/10.1029/93GL00498
Publication status	Published - 1 Jan 1993

Keywords

spatial variation of annual tree‐ring 14C
paleoclimatic ENSO indicator
tree‐ring cellulose

Access to Document

10.1029/93GL00498

Link to publication in Scopus

Cite this

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abstract = "Preliminary investigations show regional differences in atmospheric 14C activity archived in tree‐ring cellulose may reflect oceanic and atmospheric shifts associated with ENSO (El Ni{\~n}o‐Southern Oscillation) events. Much of the shared variation between sites in Washington and Arizona can be attributed to global forcings such as anthropogenic 14C‐depleted CO2 emissions and modulation of 14C production. The contrasted residual variation between the Washington and Arizona data sets correlates with the annual Southern Oscillation Index (SOI) of the previous year. The spatial differences between Δ14C data sets may provide a proxy indicator of ENSO phenomenon.",

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