Tree ring width variations over western Himalaya in India and its linkage with heat and aridity indices
- 162 Downloads
Tree ring chronologies from different sites of western Himalaya have been carried out in relation to rainfall, temperature, palmer drought severity index, and heat and aridity indices of the region. The first principal component which was developed using the multi-sites chronologies of Himalaya has explained 50% common variance is positively correlated with rainfall, aridity and palmer drought severity index and negatively with temperature and heat index during spring season (February–May). The existence of strong correlation indicates that heat and aridity indices over the region might be one of the important climatic parameters which play the significant role in tree growth process. Particularly, heat index’s influence over the region indicated larger impact on annual ring width patterns than temperature.
KeywordsHeat index Aridity index Western Himalaya Tree rings
The author is gratitude to Prof. Ravi S. Nanjundiah, Director, IITM, Pune, and Dr. R. Krishnan, Executive Director, CCCR, IITM, Pune, for their kind support and providing infrastructure facilities. The author is thankful to NOAA for providing tree ring data. The author is thankful to CRU for making climatic data available on the website. The author is also thankful to Dr S.S. Nandargi, Scientist-D, IITM, Pune, for preparing Fig. 1 of the study area.
- Gadgil S (1996) Climate change and agriculture—an Indian perspective. In: Abrol YP, Gadgil S, Pant GB (eds) Climate variability and agriculture. Narosa, New Delhi, India, pp 1–18Google Scholar
- Hughes MK (1992) Dendroclimatic evidence from the western Himalaya. In: Bradley RS, Jones PD (eds) Climate since AD1500. Routledge, LondonGoogle Scholar
- Pant GB, Borgaonkar HP, Rupakumar K (1998) Climatic signals from tree-rings: a dendroclimatic investigation of Himalayan spruce (Picea smithiana). Himalayan Geology 19(2):65–73Google Scholar
- Ram S, Borgaonkar HP (2013) Growth response of conifer trees from high altitude region of Western Himalaya. Curr Sci 105(2):225–231Google Scholar