中国沙漠 ›› 2006, Vol. 26 ›› Issue (2): 283-285.

• 研究简报 • 上一篇    下一篇


王亚军1, 勾晓华2, 刘普幸2, 陈发虎2   

  1. 1.河北工程学院 资源系, 河北 邯郸 056038; 2.兰州大学西部环境教育部重点实验室 中德干旱环境联合研究中心,甘肃 兰州 730000
  • 收稿日期:2004-11-06 修回日期:2005-01-17 出版日期:2006-03-20 发布日期:2006-03-20

Change of Spring Temperature in Yuzhong of Gansu Province during Recent 200 Years

WANG Ya-jun1, GOU Xiao-hua2, LIU Pu-xing2, CHEN Fa-hu2   

  1. 1.Department of Resources Science, Hebei University of Engineering, Handan 056038, China; 2.Center for Arid Environment and Paleoclimate Research, Key Laboratory of Western China’s Environment System under Ministry of Education, Lanzhou University, Lanzhou 730000, China
  • Received:2004-11-06 Revised:2005-01-17 Online:2006-03-20 Published:2006-03-20

摘要: 对祁连山东段余脉半湿润气候区内的树木生长对气候因子的响应关系进行了研究,利用树轮宽度指数分析了200 a来甘肃榆中春季气温的变化特点。响应结果发现年轮宽度指数与春季气温显著相关,达到0.01显著性水平。200 a来春季气温经历4次冷期和3次暖期,以暖期为主,而且冷暖变化具有60 a和15 a周期。另外,冷暖变化趋势与西藏、横断山区的气候变化比较一致。

关键词: 春季气温, 树木年轮, 甘肃榆中

Abstract: Tree-ring increment cores were sampled at Xinglongshan Mountain in Gansu Province. The object of this research is to study the relationship between tree-ring and climate factors, and to analysis the past 200 years climate change. There is positive correlation between tree-ring index and spring temperature. The correlation coefficient is 0.429, which is significant at the 0.01 level. The tree-ring width is limited by spring temperature. According to the tree-ring data, the change of spring temperature for the period A.D.1800 to 1999 shows four cold and three warm periods in the low frequency variations of 11 years moving average since A.D.1800. The result indicated that the Yuzhong area was mainly in a warm state since A.D.1800.After analyzing periodic characteristics, we find that spring temperature since A.D.1800 has 60 years periods and 15 years periods.Seen from the large scale for the last 200 years, there is no obvious warm or cold tendency for spring temperature, but take on an alternative form. Contrasting to the climate change of neighboring area, we find that warm periods correspond well with those of Hengduan Mountains and Xizang.

Key words: spring temperature, tree ring, Yuzhong in Gansu province