Open Access Digital Repository of Ministry of Earth Sciences, Government of India

Intra-annual oxygen isotope variations in central Indian teak cellulose: Possibility of improved resolution for past monsoon reconstruction

Managave, SR and Sheshshayee, MS and Borgaonkar, HP and Ramesh, R (2010) Intra-annual oxygen isotope variations in central Indian teak cellulose: Possibility of improved resolution for past monsoon reconstruction. Current Science, 98 (7). pp. 930-937.

Full text not available from this repository. (Request a copy)

Abstract

A clear seasonal cycle has been detected in the intraannual oxygen isotope variations (δ18O) of cellulose from several annual growth rings of teak trees that grew in central India. This persistent cycle is marked by higher δ18O values at the ring boundaries and lower δ18O values at intermediate parts. The amplitude of this seasonal cycle varies up to 6.8°. Based on the pattern of teak growth reported in the literature and a plant physiological model that interprets the δ18O of plant cellulose, it seems possible to identify subsections of a ring that formed during pre-monsoon, peak-monsoon and post-monsoon. Comparison of the δ18O profile of a ring (year AD 1971), analysed with the highest resolution, and a model profile based on concurrent local meteorological data indicates the possibility of achieving a ~20 day resolution in monsoon reconstruction by intra-annual δ18O measurements.

Item Type: Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Uncontrolled Keywords: Tectona grandis
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 22 May 2015 12:02
Last Modified: 22 May 2015 12:02
URI: http://moeseprints.incois.gov.in/id/eprint/802

Actions (login required)

View Item View Item