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Correlations and periodicities in Himalayan tree ring widths and temperature anomalies through wavelets

Authors
  • Panigrahi, Prasanta K.
  • Manimaran, P.
  • Lakhmi, Ananth
  • Yadav, Ram R.
Type
Preprint
Publication Date
Apr 01, 2006
Submission Date
Apr 01, 2006
Identifiers
arXiv ID: nlin/0604002
Source
arXiv
License
Unknown
External links

Abstract

We have studied periodicities and correlation properties of tree ring width chronology of deodar tree from Joshimath (1584 - 1999 years) and Uttarkashi (1500 - 2002 years) in the western Himalayas and the pre-monsoon (March-April-May) temperature anomalies (1876 - 2003) relative to 1961 -1990 mean, through wavelet analysis. Periodic behavior is observed in the tree ring chronology with periodicity in the form 11, 22, and 42 years. The analysis of the self-similar nature reveals long-range correlation with a Hurst exponent, $H >0.5$. These are anti-correlated with the temperature anomalies. An interesting inversion behavior is observed around the year 1750. The power spectral analysis of the time series corroborate the results of wavelet method.

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