Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5297 |
Seasonal rainfall patterns classification, relationship to ENSO and rainfall trends in Ecuador | |
Tobar, Vladimiro1,2; Wyseure, Guido2 | |
2018-03-30 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:4页码:1808-1819 |
文章类型 | Article |
语种 | 英语 |
国家 | Ecuador; Belgium |
英文摘要 | Water is one of Ecuador's most important natural resources, whose management should rely on good information and adequate models for the water balance. Although there are many studies focusing on rainfall and temperatures, most of them are localized for specific projects or study basins. The convergence of factors like its location in the Intertropical Convergence Zone, the Amazon River basin, the complex topography of the Andes, and being next to the Pacific Ocean impacted by the El Nino Southern Oscillation, modelling climate in Ecuador is a challenging task. The aim of this research was to classify seasonal rainfall patterns, using robust procedures to deal with missing values and outliers. The selected database contained 319 stations with monthly rainfall from 1982 to 2011. A hierarchical clustering technique applied to the proportion of monthly rainfall percentiles allowed identifying four clusters that, when compared to a digital elevation model, resulted geographically related to Sierra, Coast, Amazon and Coast Orographic Sierra (COS). Coast shows strong seasonality with the dry season from June to November, while COS presents a similar pattern with moderate seasonality, the Amazon exhibits mild to no seasonality and the Sierra with a moderate seasonality. Interestingly, the Amazon seasonality enters rather deep into the Sierra through large river valleys. Cumulative differential plots of the standardized deleted deviations of monthly rainfall aided detecting cluster dependent El Nino effects in rainfall for Coast and COS. Correlations of rainfall versus SST at El Nino regions were also cluster dependent, with low to no significant correlations for Amazon, higher correlations for Coast and COS and moderate correlations for Sierra. Monthly rainfall trends assessed by the non-parametric method of Sen's slopes, showed overall decreasing trends for September and October rainfall and increasing from February to April, thus suggesting a strengthening of seasonality. |
英文关键词 | seasonal rainfall patterns cluster ENSO trends Andes Ecuador |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427011700015 |
WOS关键词 | VARIABILITY ; TEMPERATURE ; ANDES ; BASIN |
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/37425 |
专题 | 气候变化 |
作者单位 | 1.Univ Cuenca, Fac Ingn, Cuenca, Ecuador; 2.Katholieke Univ Leuven, Soil & Water Management Div, Leuven, Belgium |
推荐引用方式 GB/T 7714 | Tobar, Vladimiro,Wyseure, Guido. Seasonal rainfall patterns classification, relationship to ENSO and rainfall trends in Ecuador[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(4):1808-1819. |
APA | Tobar, Vladimiro,&Wyseure, Guido.(2018).Seasonal rainfall patterns classification, relationship to ENSO and rainfall trends in Ecuador.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(4),1808-1819. |
MLA | Tobar, Vladimiro,et al."Seasonal rainfall patterns classification, relationship to ENSO and rainfall trends in Ecuador".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.4(2018):1808-1819. |
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