摘要
【目的】研究鄂尔多斯中部地区未来气候环境的变化,探讨树木年轮生长与气候环境的响应关系。【方法】对鄂尔多斯中部地区油松(Pinus tabulaeformis)树木年轮样本进行了树轮密度指标的分析,结果表明,研究区树木年轮最大密度指标与树木生长期6-10月降水量有显著的正相关关系,相关系数为0.582(P>0.001)。利用油松树木年轮最大密度指数,对研究区1888年以来6-10月的降水量变化进行了重建,重建序列方差解释量为0.339。【结果】重建结果分析表明,鄂尔多斯中部地区过去115年中有明显的干湿变化特征,降水较多的湿润时段有:1888-1896年、1903-1908年、1934-1953年、1984-1993年;降水较少的干旱时段有:1897-1902年、1920-1933年、1954-1958年、1994-2000年。功率谱分析表明,重建降水量变化序列有2年、7年以及11年左右的周期变化。【结论】该地区降水变化与区域气候变化相一致,降水变化可能受大尺度气候环境变化的控制与影响。
This study aimed to investigate the future change of climate and environment in Central Ordos,and study the correlation between climatic environment change and tree-ring growth.【Method】Tree-ring samples from Pinus tabulaeformis were collected in Central Ordos and analyzed by measuring tree-ring densities using X-ray densitometry.Tree-ring maximum density chronologies were found to be significantly correlated with precipitation in tree growing season from June to October with a coefficient of 0.582（P0.001）.The chronology of maximum density was used to reconstruct the total precipitation from June to October during 1888-2002with an explained variance of 0.339.【Result】In the past 115years,there were 4humid periods（1888-1896,1903-1908,1934-1953and 1984-1993） and 4 arid periods（1897-1902,1920-1933,1954-1958and 1994-2000）.The power spectrum analysis indicated that precipitation from June to October had wave periods of 2-year,7-year and 11-year.【Conclusion】The climatic fluctuations of research area were identical to regional climate change and were controlled and influenced by large scale climatic and environmental changes.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2013年第8期96-102,109,共8页
Journal of Northwest A&F University(Natural Science Edition)
基金
国家自然科学青年基金项目"渭河流域气候及河川径流变化的树轮记录"(41102107)
国家自然科学重大基金项目"水文序列变异诊断和重构理论与方法"(51190093/E0901)
中国科学院黄土与第四纪地质国家重点实验室开放基金项目(SKLLQG0904
SKLLQG1017)
关键词
油松
树木年轮
最大密度
降水量重建
Pinus tabulaeformis
tree rings
maximum density
precipitation reconstruction
