祁连山中段树木年轮低频气候信息提取方法探讨

摘要/Abstract

摘要： 对现有的区域曲线标准化方法（RCS）进行改进，提出区域生长曲线标准化方法(Regional Growth Curve Standardization, RGCS)，以尽多保留树轮序列中的低频气候信息。利用祁连山中段的树轮样本，分别建立了STD、RCS和RGCS年表，并将RGCS年表与STD、RCS年表进行对比分析。结果表明：RGCS年表保留低频信息能力最强，RCS年表次之，STD年表则相对较弱，且RGCS年表有着更好的对温度信号的响应能力。

关键词: 祁连圆柏, 树轮年表, 低频信息, 生长趋势, 气候变化

Abstract: We presented a new chronology development method which was named Regional Growth Curve Standardization (RGCS), and introduced detailed procedures of this methodology used in Qilian juniper tree-ring samples from the middle Qilian Mountains in northwestern China. The chronology was compared with standardization (STD) and Regional Curve Standardization (RCS) chronologies with a length of 1 400 years. Compared with the RCS method, the RGCS considers the disturbances originating from climatic variations in different time periods in detrending process. The RGCS is superior to the RCS with respect to its preserving low-frequency climate variability, although this improvement is not very significant. Comprehensive analysis indicates that RGCS chronology is better at responding to temperature variations than the STD and RCS chronologies.

Key words: Qilian juniper, tree-ring chronology, low-frequency information, growth trends, climate change

中图分类号:

P468.0

黄凯, 杨保. 祁连山中段树木年轮低频气候信息提取方法探讨[J]. 中国沙漠, 2012, 32(3): 806-805.

HUANG Kai, YANG Bao. A New Approach for Preserving Low-frequency Climate Variability from Millennium-long Tree-ring Chronology[J]. JOURNAL OF DESERT RESEARCH, 2012, 32(3): 806-805.

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