MPDI-based Comparison on Spatiotemporal Variation of Drought over Oasis and Desert in Tarim Basin

doi:10.7522/j.issn.1000-694X.2016.00057

JOURNAL OF DESERT RESEARCH ›› 2017, Vol. 37 ›› Issue (4): 775-783.DOI: 10.7522/j.issn.1000-694X.2016.00057

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MPDI-based Comparison on Spatiotemporal Variation of Drought over Oasis and Desert in Tarim Basin

Guo Hao^1,2, Jiapaer Guli¹, Bao Anming¹, Luo Min^1,2

1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2015-11-15 Revised:2016-04-26 Online:2017-07-20 Published:2017-07-20

Abstract

Abstract: Based on a regression analysis and Hurst index method,this study calculated the Modified Perpendicular Drought Index (MPDI) from 2001 to 2013 to investigated the spatial-temporal characteristics of droughts over oasis and desert of Tarim basin by using 8-day combined MODIS A1 dataset.The main results indicate that:both oasis and desert tend to be wetter.The oasis became wetter than before,and the amplitude of this trend over oasis is relatively larger than that over desert which is much more stable.According to the results of spatial distribution and statistical results of Hurst,the future trend seems to be consistent with the last 13 years.It is should be noted that some regions,such as the upstream region and midstream region of Tarim,the southeastern parts of irrigated area in Yuli county,show a persistent drier trend.The water resources management department and other relevant departments should pay more attention on such phenomenon.

Key words: Tarim River, oasis, desert, MPDI, R/S analysis

CLC Number:

P462.3

Guo Hao, Jiapaer Guli, Bao Anming, Luo Min. MPDI-based Comparison on Spatiotemporal Variation of Drought over Oasis and Desert in Tarim Basin[J]. JOURNAL OF DESERT RESEARCH, 2017, 37(4): 775-783.

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MPDI-based Comparison on Spatiotemporal Variation of Drought over Oasis and Desert in Tarim Basin

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