img

官方微信

高级检索

中国沙漠 ›› 2013, Vol. 33 ›› Issue (2): 390-395.DOI: 10.7522/j.issn.1000-694X.2013.00054

• 天气与气候 • 上一篇    下一篇

毛乌素沙地1969—2009年主要气候因子时间序列小波分析

胡永宁1,2, 王林和1, 张国盛1, 秦 艳3, 王 颖4, 赵培林4   

  1. 1.内蒙古农业大学, 内蒙古 呼和浩特 010018;
    2.内蒙古自治区林业监测规划院, 内蒙古 呼和浩特 010020;
    3.中国农业科学院草原研究所, 内蒙古 呼和浩特 010010;
    4.乌审旗林业局, 内蒙古 乌审旗 017300
  • 收稿日期:2012-04-23 修回日期:2012-05-29 出版日期:2013-03-20 发布日期:2012-05-29

Wavelet Analysis on the Temporal Series of Principal ClimateFactors in Mu Us Sandy Land during 1969-2009

HU Yong-ning1,2, WANG Lin-he1, ZHANG Guo-sheng1, QIN Yan3, WANG Ying4, ZHAO Pei-lin4   

  1. 1.Inner Mongolia Agricultural University, Hohhot 010018, China;
    2.Institute of Forestry Monitoring & Planning of Inner Mongolia, Hohhot 010020, China;
    3.Grassland Research Institute, Chinese Academy of Agricultural Sciences, Hohhot 010010, China;
    4.Forestry Bureau of Wushen Banner, Wushen Banner 017300, Inner Mongolia, China
  • Received:2012-04-23 Revised:2012-05-29 Online:2013-03-20 Published:2012-05-29

摘要:

采用Morlet复值小波变换法对毛乌素沙地5个气象站点1969—2009年主要气候要素不同时间尺度下的变化周期和突变点进行了分析,并根据主周期预测了未来气温、降水和相对湿度的变化趋势。结果表明: 1969—2009年,毛乌素沙地年平均气温呈现出波动上升的趋势,平均上升0.401 ℃/10a,年降水量和年平均相对湿度的变化趋势不明显;毛乌素沙地年平均气温、年降水量和年平均相对湿度的年际变化过程中存在着多重时间尺度上的复杂嵌套结构,在不同的尺度周期中,表现出不同的冷暖、干湿振荡规律,总体表现为由小尺度无明显规律的剧烈振荡向大尺度有明显规律的振荡变化;目前气候正处于“暖干”向“暖湿”的过渡阶段,且这种暖湿化主要受气候周期性变化的影响。

关键词: 毛乌素沙地, 气温, 降水, 相对湿度, 小波分析

Abstract:

Based on air temperature, precipitation and relative humidity data from 5 meteorological stations in Mu Us Sandy Land from 1969 to 2009, the periodic variations and jump features of the climate change under different time scales were analyzed by Morlet wavelet analysis method, and the future tendencies of the main meteorological element were forecasted according to their main periods. Results showed that air temperature increased with fluctuation in Mu Us Sandy Land during 1969-2009, but the change trends of precipitation and relative humidity were not significant; A complex nested structure for multi-time scales existed in the process of climate change, and the oscillation trend was not consistent for different temporal scales, while it changed from a disorderly and violent oscillation at short-term scale to a regular oscillation at long-term scale; And now the climate was at a transition stage from warm-dry to warm-wet, and the warm-wet tendency was affected mainly by the periodic climate change.

Key words: Mu Us Sandy Land, air temperature, precipitation, relative humidity, wavelet analysis

中图分类号: