阿尼玛卿山中部高山林线树轮宽度对气候变化的响应  

Climatic response of tree-ring width from alpine treeline in the middle of Anyemaqen Mountains, northeastern Tibetan Plateau,China

作　　者：彭剑峰[1] 勾晓华[1] 陈发虎[1] 刘普幸[1] 张永[1] 方克艳[1] 

机构地区：[1]兰州大学西部环境教育部重点实验室中德干旱环境研究中心

出　　处：《北京林业大学学报》2006年第S2期57-63,共7页Journal of Beijing Forestry University

基　　金：国家自然科学基金创新群体基金项目(40421101);国家自然科学基金重点项目(40671191;90502008)

摘　　要：通过对阿尼玛卿山地中部高山林线祁连圆柏树木年轮宽度年表的研究,发现高山林线附近的树轮年表中含有较高的气候信息;树木生长与当年7月平均气温呈显著正相关.在对有气象资料记录的1959—2001年间的树木年轮宽度指数与7月平均气温的分析中,发现其间有较好的一致性;但在1976—2001年间,7月平均气温和树木年轮宽度指数在变化趋势和相关性上表现出更好的一致性,且从分析中发现7月平均温度是高山林线分布的制约因子,而7月的低温和多雨则是高山林线树木生长的主要限制因子;高山林线树木生长的193年期间以百年周期和两年准振荡周期最为显著;西北干旱区中普遍存在的20世纪20—30年代“高温干旱期”在这里也很显著,同时该研究也发现1861—1878年是近200年来的7月气温最低和最长的时段.Based on the cores of Juniperus przewalskii from alpine treeline in the middle Anymaqin Mountains, northeastern Tibetan Plateau, the authors developed the tree-ring width index standard chronologies. The results showed that characteristics of chronology had more climatic information, and tree-ring width was significant and positively correlated with the mean temperature in July. There was remarkable consistency between tree-ring width curve and July mean temperature in weather data recorded during 1959-2001. However, It was found that there was preferably consistency between tree-ring width curve and July mean temperature during 1976-2001. The results indicted that low temperature and excessive rain in July were main limited factors. The results of cycle analysis showed that the main periods were century and two permit-oscillations in 193 years. Tree-growth in alpine treeline held a high-temperature and arid period, which was general period during 1920-1930's in northwestern China, and the authors also found that it was the coldest and longest period during 1861-1878 in last 200 years.

关 键 词：阿尼玛卿山 高山林线 树木年轮 气候响应 

分 类 号：S716.3[农业科学—林学]