Relationship between #delta#~(13)C and index of ring width

摘要

The tree-ring reported here is one of pine discs sampled at 3 200 m a.s.l. in Qongtelian Valley in the Tuomu'er Peak region in 1978. The local geographical and climate condition has been introduced in detail. An index series was obtained after the width of tree-rings on 5 different radii was measured and fitted by linear and negative exponential functional regression.