Research Article | OPEN ACCESS
Using Wavelet Analyses to Determine Drought Characteristics: A Cause Study of Western Jilin Province, China
1She-Ming Chen, 2Wen-Xi Lu, 3He Wang and 4Zhu Kang
1Tianjin Institute of Geology and Mineral Resources, China Geological Survey Bureau,
Tianjin, 300170
2Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University
3Jilin Province Xinghuan Environmental Technology Service Co. Ltd.
4Jilin Team of Geological Survey Center of China Building Materials Industry,
Changchun 130021, China
Research Journal of Applied Sciences, Engineering and Technology 2014 5:578-584
Received: January 05, 2013 | Accepted: January 31, 2013 | Published: August 05, 2014
Abstract
Drought characteristics vary substantially among different climatic regions. Here in this study, wavelet analyses are used to characterize drought from monthly precipitation. The precipitation data are obtained from 6 fairly distributed stations across Western Jilin province (in China) for the period from 1957 to 2010. The calculated monthly Standardized Precipitation Index (SPI) is used as a drought index. Morlet wavelet analysis shows multiple time-scales and significant cycles of drought exist in the study area. The cross wavelet approach was applied to see if there was a connection between monthly SPI time series and large scale climate indices, such as NINO3. The result shows that drought occurrence in the region is mainly influenced by medium and long-time climatic factors. However, different factors have degrees of influence at different stations.
Keywords:
Drought characteristics, multifractal analysis, standardized precipitation index, wavelet analysis, western Jilin province,
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Competing interests
The authors have no competing interests.
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This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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