摘要
利用小波分析、Mann-Kendall等统计方法和台站资料、历史时期气候代用资料及太阳黑子资料,分析了西北地区气候突变发生的时间及分布、与太阳活动的关系.结果表明:西北地区在气候变暖的背景下,降水增加,主要分布在新疆及河西等地,东部变化不大或略有减少;目前正处在百年尺度上太阳活动的强烈时期,树木年轮表明西北地区干湿变化除与太阳黑子周期有很好的正相关外,还存在64a变化周期.
In this paper, instrumental meteorology station data in Northwest China and climatic proxy data such as tree-ring index, dryness and wetness grades series and solar activity index are used to analyze climate characteristics and changing trend. The results show that precipitation increases in west part of Northwest China significantly; solar activity is intensive in hundred-year scale, and tree-ring index indicates that dryness and wetness variation in Northwest China has a period of 64 years and has good positive relationship with sunspot′s 11-year cycle.
出处
《冰川冻土》
CSCD
北大核心
2003年第6期672-675,共4页
Journal of Glaciology and Geocryology
基金
中国科学院知识创新工程重大项目(KZCX1 10 06
KZCX2 301)
中国科学院寒区旱区环境与工程研究所知识创新工程项目(CACX2002102)资助
关键词
气候变化
分析
西北地区
变化周期
Northwest China
recent and historical periods
climate change
analyze
