Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5812 |
Exposure assessment of rainfall to interannual variability using the wavelet transform | |
Zeri, Marcelo1; Cunha-Zeri, Gisleine2; Gois, Givanildo3; Lyra, Gustavo B.4; Oliveira-Junior, Jose Francisco5 | |
2019 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
卷号 | 39期号:1页码:568-578 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil |
英文摘要 | It is generally accepted that El Nino-Southern Oscillation (ENSO) is the main modulator of rainfall variability over Northern South America in the interannual scale. Assuming that, an index is proposed to quantify this expected interannual variability in time series of rainfall. The result is the exposure assessment to the effects of droughts, measured with the Standardized Precipitation Index (SPI) for the monthly scale. The SPI is calculated from rainfall series, and wavelet analysis is used to estimate the variance for different frequencies present in the signal. The Wavelet Interannual Variability Index (WIVI) is calculated as the sum of the wavelet coefficients over a predetermined range of modes of variability (with periods longer than 2 year and shorter than 8 years). The index was tested using a dataset of rainfall records from Tocantins state, Central Brazil. Most of the series ranged from 1974 to 2012. On average, the series had 3.2% of gaps which were not filled to avoid the effect of artificial trends on the data. The state lies mostly over the Cerrado biome and is a new frontier of agricultural development in Brazil. According to the results, the Northern region is under higher exposure of interannual variability, with higher values of WIVI. The assessment is in agreement with large-scale features of South American climate, specifically considering the influences of the Pacific and Atlantic Oceans and their patterns of sea surface temperature (SST). |
英文关键词 | drought interannual variability precipitation standardized precipitation index wavelet analysis |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459638400041 |
WOS关键词 | SOUTH-AMERICA ; SOIL-MOISTURE ; PRECIPITATION ; ATLANTIC ; BRAZIL ; OSCILLATION ; PACIFIC ; DROUGHT ; TRENDS ; INDEX |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/36874 |
专题 | 气候变化 |
作者单位 | 1.Natl Ctr Monitoring & Early Warning Nat Disasters, Sao Jose Dos Campos, Brazil; 2.Natl Inst Space Res INPE, Ctr Earth Syst Sci CCST, Sao Jose Dos Campos, Brazil; 3.UFF, Ctr Tecnol, Escola Engn Ind Met & Volta Redonda, Rio De Janeiro, Brazil; 4.Univ Fed Rural Rio de Janeiro, IF, DCA, Rio de Janeiro, Brazil; 5.Univ Fed Alagoas UFAL, Inst Ciencias Atmosfer ICAT, Maceio, Brazil |
推荐引用方式 GB/T 7714 | Zeri, Marcelo,Cunha-Zeri, Gisleine,Gois, Givanildo,et al. Exposure assessment of rainfall to interannual variability using the wavelet transform[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019,39(1):568-578. |
APA | Zeri, Marcelo,Cunha-Zeri, Gisleine,Gois, Givanildo,Lyra, Gustavo B.,&Oliveira-Junior, Jose Francisco.(2019).Exposure assessment of rainfall to interannual variability using the wavelet transform.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(1),568-578. |
MLA | Zeri, Marcelo,et al."Exposure assessment of rainfall to interannual variability using the wavelet transform".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.1(2019):568-578. |
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