干旱区生态环境知识资源中心(Arid): 贺兰山过去196年降水的树轮宽度重建及降水变率

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	贺兰山过去196年降水的树轮宽度重建及降水变率
其他题名	A 196-YEAR PRECIPITATION RECONSTRUCTION BASED ON TREE-RING WIDTH IN THE HELAN MOUNTAINS OF NORTH CHINA AND THE PRECIPITATION VARIABILITY
	史江峰; 刘禹; 蔡秋芳; 孙军艳; 易亮
来源期刊	海洋地质与第四纪地质
ISSN	0256-1492
出版年	2007
卷号	27 期号:1 页码:95-100
中文摘要	贺兰山属于中国北方的半干旱地区，位于东亚夏季风的西北缘。应用贺兰山南段、中段和北段的3组树轮宽度差值年表合成贺兰山树轮宽度年表，应用邻近采样点的贺兰山东坡、山顶和西坡的气象站资料合成贺兰山气象数据。通过贺兰山树轮宽度年表和贺兰山气象数据的线性回归分析，重建了1802-1997年27月降水标准化序列，重建方程的方差解释量是46％。计算重建序列的11年滑动平均标准差后，发现存在着3次标准差的突然变化：1908年标准差由前年的0．38增加到当年的0．56，1942年标准差由两年前的0．57增加到当年的0．70，1956年标准差由前年的0．74降低到当年的0．63。小波分析表明，1908年到1949年之间存在显著的11年准周期，1942年出现2年准周期，该2年准周期到1959年彻底消失。19651997年，存在由8年向3年过渡的准周期。11年周期对应着太阳活动周期，2年周期对应准两年脉动，8年到3年周期与ENSO周期比较一致。故此认为，当太阳活动、准两年脉动或ENSO活动增强时，贺兰山地区降水变率一般比较大，年际间降水变得不稳定。
英文摘要	The investigated site in the Helan Mountains, is located on northwest margin of East Asian Summer Monsoon circulation, a semiarid region in North China. Three sets of tree-ring width residual chronology are used in this study, which were built using samples collected in south, middle and north of the mountains respectively. These three chronologic data were combined to form Helan chronology. In addition, meteorological data of three stations close to sampling sites were used, respectively in the east slope, on the top, and in the west slope of the mountains. The normalized data from these three meteorological stations were averaged to represent climatic situation of the Helan Mountains. Through linear regression analysis between the Helan chronology and the Helan meteorological data, the normalized precipitation of February-July from 1802 to 1997 was reconstructed and the explained variance was 46%. After 11-a moving standard deviation was calculated on the reconstructed precipitation series, three abrupt changes of standard deviation were found：one took place in 1908, increasing from 0.38 of the previous year to 0.56; the second was in 1942, increasing from 0. 57 two years before to 0. 70; and the third was in 1956, decreasing from 0. 74 of the previous year to 0. 63. Wavelet analysis showed that a dominant 11-a quasi-period occurred during 1908-1949, and that a 2-a quasi-period began to predominate in 1942, and then the 2- a quasi-period disappeared completely in 1959. There were significant 8-a transiting to 3-a periods from 1965 to 1997. The 11-a period probably corresponds to the sunspot activity and the 2-a period may correspond to ＂Quasi-biennial Oscillation＂. 8- to 3-a periods are similar to El Nino/Southern Oscillation periods. Thus, the precipitation variability might be high and the yearly precipitation became unstable in the Helan Mountains when the sunspot activity, Quasi-biennial Oscillation, or El Nino/La Nina activity were strengthened.
中文关键词	树木年轮 ; 小波 ; 太阳黑子 ; 准两年脉动 ; 贺兰山
英文关键词	ENSO tree ring wavelet sunspot ENSO, quasi-biennial oscillation Helan Mountains
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:2738820
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378544
作者单位	史江峰, 中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 西安, 陕西 710075, 中国.; 刘禹, 中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 西安, 陕西 710075, 中国.; 蔡秋芳, 中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 西安, 陕西 710075, 中国.; 孙军艳, 中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 西安, 陕西 710075, 中国.; 易亮, 中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 西安, 陕西 710075, 中国.
推荐引用方式 GB/T 7714	史江峰,刘禹,蔡秋芳,等. 贺兰山过去196年降水的树轮宽度重建及降水变率[J],2007,27(1):95-100.
APA	史江峰,刘禹,蔡秋芳,孙军艳,&易亮.(2007).贺兰山过去196年降水的树轮宽度重建及降水变率.海洋地质与第四纪地质,27(1),95-100.
MLA	史江峰,et al."贺兰山过去196年降水的树轮宽度重建及降水变率".海洋地质与第四纪地质 27.1(2007):95-100.