Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11269-017-1856-6 |
Spatial and Time Variability of Drought Based on SPI and RDI with Various Time Scales | |
Merabti, Abdelaaziz1; Martins, Diogo S.2; Meddi, Mohamed1; Pereira, Luis S.3 | |
通讯作者 | Pereira, Luis S. |
来源期刊 | WATER RESOURCES MANAGEMENT
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ISSN | 0920-4741 |
EISSN | 1573-1650 |
出版年 | 2018 |
卷号 | 32期号:3页码:1087-1100 |
英文摘要 | The spatial and temporal variability of droughts were studied for the Northeast Algeria using SPI and RDI computed with monthly precipitation data from 123 rainfall stations and CFSR reanalysis monthly temperature data covering the period 1979-80 to 2013-14. The gridded temperature data was interpolated to all the locations having precipitation data, thus providing to compute SPI and RDI with the time scales of 3-, 6- and 12-month with the same observed rainfall data. Spatial and temporal patterns of droughts were obtained using Principal Component Analysis in S-Mode with Varimax rotation applied to both SPI and RDI. For all time scales of both indices, two principal components were retained identifying two sub-regions that are similar and coherent for all SPI and RDI time scales. Both components explained more than 70% and 74% of drought spatial variability of SPI and RDI, respectively. The identified sub-regions are similar and coherent for all SPI and RDI time scales. The Modified Mann-Kendall test was used to assess trends of the RPC scores, which have shown non-significant trends for decreasing drought occurrence and severity in both identified drought sub-regions and all time scales. Both indices have shown a coherent and similar behavior, however with RDI likely showing to identify more severe and moderate droughts in the southern and more arid sub-region which may be due to its ability to consider influences of global warming. Results for RDI are quite uniform relative to time scales and show smaller differences among the various climates when compared with SPI. Further assessments covering the NW and NE of Algeria using longer time series should be performed to better understand the behavior of both indices. |
英文关键词 | PrincipalComponentAnalysis ModifiedMann-Kendall test Trendanalysis CFSR reanalysis products Spatial distribution of drought classes Climate warming |
类型 | Article |
语种 | 英语 |
国家 | Algeria ; Portugal |
收录类别 | SCI-E |
WOS记录号 | WOS:000422982300016 |
WOS关键词 | STANDARDIZED PRECIPITATION INDEX ; TEMPORAL VARIABILITY ; CLIMATE-CHANGE ; IRRIGATION REQUIREMENTS ; CROP EVAPOTRANSPIRATION ; HOMOGENEOUS REGIONS ; TRENDS ; REGIONALIZATION ; FREQUENCY ; PATTERNS |
WOS类目 | Engineering, Civil ; Water Resources |
WOS研究方向 | Engineering ; Water Resources |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/213691 |
作者单位 | 1.Ecole Natl Super Hydraul Blida, Lab GEE, Blida, Algeria; 2.Univ Lisbon, IDL, Fac Ciencias, Lisbon, Portugal; 3.Univ Lisbon, Inst Super Agron, LEAF Linking Landscape Environm Agr & Food, Lisbon, Portugal |
推荐引用方式 GB/T 7714 | Merabti, Abdelaaziz,Martins, Diogo S.,Meddi, Mohamed,et al. Spatial and Time Variability of Drought Based on SPI and RDI with Various Time Scales[J],2018,32(3):1087-1100. |
APA | Merabti, Abdelaaziz,Martins, Diogo S.,Meddi, Mohamed,&Pereira, Luis S..(2018).Spatial and Time Variability of Drought Based on SPI and RDI with Various Time Scales.WATER RESOURCES MANAGEMENT,32(3),1087-1100. |
MLA | Merabti, Abdelaaziz,et al."Spatial and Time Variability of Drought Based on SPI and RDI with Various Time Scales".WATER RESOURCES MANAGEMENT 32.3(2018):1087-1100. |
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