Chinese Journal of Magnetic Resonance ›› 1990, Vol. 7 ›› Issue (2): 201-204.
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Wen Guilan, Wan Guojiang
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Abstract: Samples of pine tree ring from Mt. Tuomuer region of Xinjiang province were researched using ESR method. The result shows that the free radical concentration Ng is an index of tree growth and relates to the season, and to the temperature and the precipitation. The Ng of spring wood is more than that of autumn. The Ng of wood was prominently influenced by the period of sunspot activity and it varies with the solar period, but the values of peak and valley have been preacted 2-3 years or postponed.
Key words: Tree ring, Free radical concentration
Wen Guilan, Wan Guojiang. PRELIMINARY STUDY ON THE RECORDS OF CLIMATIC EFFECT IN TREE RING USING ESR METHOD[J]. Chinese Journal of Magnetic Resonance, 1990, 7(2): 201-204.
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