Standardization of Qilian juniper ring-width series in the eastern margin of the Qaidam Basin
文献类型：SCI/SSCI论文
| 作者 | Xu Y.; Xu Y. |
| 发表日期 | 2007 |
| 关键词 | the Qaidam Basin Qilian juniper tree-ring width growth trend qinghai-tibetan plateau tree-ring temperature precipitation reconstruction record china |
| 英文摘要 | Standardization is one of the important procedures in dendroclimatology. We used abundant Qilian juniper (Sabina przewalskii Kom.) tree-ring samples from the eastern margin of the Qaidam Basin to develop a new standardization method, i.e. total growth curve (TGC). The samples that contained the complete pith and reached to the growing culmination around the 40th-60th year were used to fit TGC, and the generalized negative exponential function was used to fit the curve. Usually, most cores cannot reach the arboreal pith for some reasons and it is difficult to determine the arboreal cambial age. The empirical model of initial radial growth (IRG) was employed to estimate the number of rings missing from the pith by the same data and IRG model explained 90.9% of the variance. When developing the chronology, the cambial ages of cores that contained the complete pith were regarded as beginning from the first year and others were determined by the numbers of missing and included rings in the core. Standardization was accomplished by dividing each tree-ring series by corresponding TGC. The chronologies developed by TGC can retain more low-frequency variational information and TGC helps to develop more reliable tree-ring width chronology. |
| 出处 | Journal of Geographical Sciences |
| 卷 | 17 |
| 期 | 2 |
| 页 | 175-186 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1009-637X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22646]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Xu Y.,Xu Y.. Standardization of Qilian juniper ring-width series in the eastern margin of the Qaidam Basin. 2007. |
入库方式： OAI收割
来源：地理科学与资源研究所
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