Wavelet Analysis on Cycle Regularity of Precipitation in Different Eco-geographical Zones of Xilinguole Steppe

WANG Haimei; LI Zhenghai; YAN Jun; WU Lan

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Wavelet Analysis on Cycle Regularity of Precipitation in Different Eco-geographical Zones of Xilinguole Steppe

- Wavelet Analysis on Cycle Regularity of Precipitation in Different Eco-geographical Zones of Xilinguole Steppe
- Bulletin of Soiland Water Conservation Vol. 29, Issue 5, Pages: 46-49(2010)
- 作者机构：
  
  1. 内蒙古自治区气象科学研究所,内蒙古,呼和浩特,010051
  2. 大连民族学院生命科学学院,辽宁,大连,116600
- 作者简介：
- 基金信息：
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- Published：2010
- 稿件说明：
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WANG Haimei, LI Zhenghai, YAN Jun, et al. Wavelet Analysis on Cycle Regularity of Precipitation in Different Eco-geographical Zones of Xilinguole Steppe[J]. Bulletin of Soiland Water Conservation, 2010, 29(5): 46-49.
DOI：

WANG Haimei, LI Zhenghai, YAN Jun, et al. Wavelet Analysis on Cycle Regularity of Precipitation in Different Eco-geographical Zones of Xilinguole Steppe[J]. Bulletin of Soiland Water Conservation, 2010, 29(5): 46-49. DOI：

摘要

以锡林郭勒盟及其周边地区17个气象站点1960年以来的月降水量数据为基础

利用气象学与生态学的学科交叉知识

按气象站点所在地区生态地理区划分割

在Matlab等软件的支持下

用小波分析的方法

研究各生态地理区年降水量的周期性变化规律及各区之间的异同点。研究结果表明

在25～32a时间尺度上

4个区的降水均有较明显的周期信号

降水丰缺均交替出现

但交替年份存在区域差异;根据周期变化的特点可以推断

2007年以后的15a左右时间

锡林郭勒盟及其周边地区降水偏少

气候有进一步旱化的趋势。

Abstract

This study was based on the precipitation data since 1960 from 17 weather stations in Xilinguole League and related areas.The interdisciplinary knowledge between meteorology and ecology was used and eco-geographical regions were divided according to the meteorological stations.The cycle regularity of precipitation and the difference among the eco-geographical zones were discussed with the aid of wavelet analysis method and Matlab software.Results showed that there was obvious cyclical change of precipitation sequence in Xilinguole League at the inter-annual scale from 1960 to 2007.There was an obvious signal of 25~32 year cycle of annual precipitation in 4 eco-geographical zones

but the periods of lack and abundance precipitation were different among the zones.According to the cycle characteristics

we can infer that in the next 15 years after 2007

Xilinguole League and related areas are in a state of persistent drought.

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