Arid
DOI10.1109/JSTARS.2013.2284006
Understanding Hydrological Repartitioning and Shifts in Drought Regimes in Central and South-West Asia Using MODIS Derived Perpendicular Drought Index and TRMM Data
Shahabfar, Alireza1; Ghulam, Abduwasit2; Conrad, Christopher1
通讯作者Shahabfar, Alireza
会议名称14th International Conference on Ground Penetrating Radar (GPR)
会议日期JUN 04-08, 2012
会议地点Shanghai, PEOPLES R CHINA
英文摘要

In this paper, we use perpendicular drought indices (PDIs) and precipitation patterns to identify hydrological repartitioning in agricultural regions located in central and south-west Asia over the last decade. The spatio-temporal patterns of surface drought derived from perpendicular drought index (PDI) and modified perpendicular drought index (MPDI) from 250-m MODerate Resolution Imaging Spectroradiometer (MODIS) data in 8-day time steps are compared against two other drought indices: the Standardized Precipitation Index (SPI) as a meteorological drought index and the potential evapotranspiration (ET0) as an agro-meteorological drought index, along with 8-day MODIS Normalized Difference Vegetation Index (NDVI). The coefficient of variation as the ratio of standard deviation over inter-annual mean drought indices, precipitation from Tropical Rainfall Measuring Mission (TRMM) data are employed to analyse trends and shifts of hydrological regimes and its connection to both climate change and anthropogenic activities in the study area. Significant correlations are found between the PDI, the MPDI and precipitation and other applied meteorological and agro-meteorological drought indices. The results show that Central Asia is one of the areas across the globe experiencing dramatic shifts in hydrological regimes, and is being severely impacted by population growth and climate change. While acknowledging previous studies that used the PDI and the MPDI over some study regions in Iran, this paper, however, confirms implementation of higher resolution data (MOD09Q1) in both spatial (250 m) and temporal (8-days) dimensions shows a greater agreement between the drought information extracted by the PDI, MPDI, and field meteorological measurements. Supported by satellite based precipitation observations, we conclude that the perpendicular drought indices can be used as a drought early warning system over arid and semi-arid climatological conditions.


英文关键词Central Asia drought monitoring MODIS perpendicular drought index time series analysis TRMM
来源出版物IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
ISSN1939-1404
EISSN2151-1535
出版年2014
卷号7
期号3
页码983-993
出版者IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
类型Article;Proceedings Paper
语种英语
国家Germany;USA
收录类别SCI-E ; CPCI-S
WOS记录号WOS:000335387900029
WOS关键词STANDARDIZED PRECIPITATION INDEX ; LEVEL FLUCTUATIONS ; CHINA
WOS类目Engineering, Electrical & Electronic ; Geography, Physical ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向Engineering ; Physical Geography ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/302398
作者单位1.Univ Wurzburg, Remote Sensing Unit, Inst Geog & Geol, D-97070 Wurzburg, Germany;
2.St Louis Univ, Ctr Sustainabil, St Louis, MO 63103 USA
推荐引用方式
GB/T 7714
Shahabfar, Alireza,Ghulam, Abduwasit,Conrad, Christopher. Understanding Hydrological Repartitioning and Shifts in Drought Regimes in Central and South-West Asia Using MODIS Derived Perpendicular Drought Index and TRMM Data[C]:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC,2014:983-993.
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