The performance of the Hugershoff curve on fitting the growth trends of tree-ring series was
tested using ring-width series with different starting years. The fitted values tend to be biased by tree-ring series close to pith, a phenomenon that was referred to as the ‘‘start-fitting problem’’. We determined three parameters with specific biological age-related meanings for the Hugershoff growth curve, i.e. the maximum growth, the maximum slope and the maximum changing ratio of slopes. A set of modified Hugershoff curves with different starting years was proposed to mitigate the start-fitting problem. Behavior of the modified Hugershoff curves on tree-ring series standardizations was tested and discussed. The ‘‘end-fitting problem’’ suggests that deviations in one interval could bias the fitted values of other time periods by using the Hugershoff curve.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/622615 |
| Date | 01 1900 |
| Creators | Fang, Keyan, Gou, Xiaohua, Peters, Kenneth, Li, Jinbao, Zhang, Fen |
| Contributors | MOE Key Laboratory of Western China’s Environmental Systems, Lanzhou University, Tree-Ring Lab, Lamont-Doherty Earth Observatory of Columbia University |
| Publisher | Tree-Ring Society |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | Article, text |
| Rights | Copyright © Tree-Ring Society. All rights reserved. |
| Relation | http://www.treeringsociety.org |
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