Climatic correlations in the stable isotope records of silver fir (Abies pindrow) trees from Kashmir, India

Ramesh, R. ; Bhattacharya, S. K. ; Gopalan, K. (1986) Climatic correlations in the stable isotope records of silver fir (Abies pindrow) trees from Kashmir, India Earth and Planetary Science Letters, 79 (1-2). pp. 66-74. ISSN 0012-821X

Full text not available from this repository.

Official URL:

Related URL:


A high degree of coherence in the annual stable isotopic records along different radial directions of a silver fir tree and between two members of this species from the Kashmir Valley has recently been reported by us. Since such a common pattern of isotopic variability is most likely due to the climatic fluctuations in the site, we have compared the mean δD, δ13C and δ18O records of these trees with instrumentally measured climatic parameters recorded in a nearby weather station to identify the climatic parameters predominantly influencing the isotopic record. A multiple regression analysis of the two records for the period 1903-1932 yields the following: (1) δD is most sensitive to the amount of growing season precipitation, followed by mean maximum temperature. Tree cellulose shows an amount effect analogous to precipitation samples. The temperature coefficient for δ D is in good agreement with earlier estimates based on spatial correlations. (2) δ13C is significantly related to humidity and cloud amount. The signs of the regression coefficients are consistent with the recent model of Francey and Farquhar for 13C/12C fractionation in C3 plants. (3) δ18O of cellulose appears to be controlled significantly by relative humidity. 18O shows less overall correlation with climatic parameters than δD and δ13C. (4) δD of carbon bound hydrogen and δ18O of tree cellulose are linearly related with a slope of 7.9±0.3, suggesting evaporative enrichment in leaf water.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:51461
Deposited On:28 Jul 2011 14:58
Last Modified:25 Jun 2012 21:28

Repository Staff Only: item control page