1. Climatic potential of δ18O of Abies spectabilis from the Nepal Himalaya.
- Author
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Sano, Masaki, Sheshshayee, M.S., Managave, S., Ramesh, R., Sukumar, R., and Sweda, Tatsuo
- Subjects
CLIMATE change ,FIR ,DENDROCLIMATOLOGY ,DENDROCHRONOLOGY ,RAINFALL ,MONSOONS ,DENSITY ,REGRESSION analysis - Abstract
Abstract: A 50-year tree-ring δ
18 O chronology of Abies spectabilis growing close to the tree line (3850masl) in the Nepal Himalaya is established to explore its dendroclimatic potential. Response function analysis with ambient climatic records revealed that tree-ring δ18 O is primarily governed by rainfall during the monsoon season (June–September), and the regression model accounts for 35% of the variance in rainfall. Extreme dry years identified in instrumental weather data are detected in the δ18 O chronology. Further, tree-ring δ18 O is much more sensitive to rainfall fluctuations than other tree-ring parameters such as width and density typically used in dendroclimatology. Correlation analyses with Niño 3.4 SST reveal time-dependent behavior of ENSO–monsoon relationships. [Copyright &y& Elsevier]- Published
- 2010
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