Estimation of Variability Characteristics of Regional Drought during 1964–2013 in Horqin Sandy Land, China
| العنوان: | Estimation of Variability Characteristics of Regional Drought during 1964–2013 in Horqin Sandy Land, China |
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| المؤلفون: | Lai Quan, Zhenhua Dong, Jiquan Zhang, Enliang Guo, Yongfang Wang |
| المصدر: | Water, Vol 8, Iss 11, p 543 (2016) Water; Volume 8; Issue 11; Pages: 543 |
| بيانات النشر: | MDPI AG, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Index (economics), lcsh:Hydraulic engineering, 010504 meteorology & atmospheric sciences, 0208 environmental biotechnology, Geography, Planning and Development, 02 engineering and technology, Horqin Sandy Land, drought, Aquatic Science, 01 natural sciences, Biochemistry, Atmosphere, lcsh:Water supply for domestic and industrial purposes, lcsh:TC1-978, Evapotranspiration, Precipitation, Agricultural productivity, Water cycle, extreme climate indices, 0105 earth and related environmental sciences, Water Science and Technology, Estimation, lcsh:TD201-500, SPEI, atmosphere indices, 020801 environmental engineering, Climatology, Period (geology), Environmental science |
| الوصف: | Drought has an important influence on the hydrological cycle, ecological system, industrial and agricultural production, and social life. Based on the different time scales of characteristics of drought variability, the standardized precipitation evapotranspiration index (SPEI), a multi-timescale index with consideration of evaporation, was used in this study to estimate the spatial and temporal variability characteristics of drought. Climatic data from 15 meteorological stations across Horqin Sandy Land during 1964–2013 were used to calculate the SPEI of 1, 3, 6, and 12 months. In order to examine the relationship between droughts and other variables, 10 extreme climate indices were calculated based on the daily precipitation and maximum/mean/minimum temperature data of 15 meteorological stations, and linkages between SPEI-12 and atmosphere indices were established using by the cross wavelet transform method. The results indicated that the climate of Horqin Sandy Land had a tendency towards drought conditions, which is particularly apparent from the year 2000 onwards. During the study period, drought events were frequent in the region. Mild drought occurred in a quarter of the month, with that of moderate, severe, and extreme drought accounting for 0.11, 0.05, and 0.02 of the total months. The spatial trend of multi-timescale drought revealed that there was an increase in the severity of drought throughout Horqin Sandy Land, among which the magnitude in southern parts was larger than that of northern parts. The results also showed that the short time scale drought negatively correlated with precipitation extremes and positively correlated with temperature extremes. Furthermore, the long time scale drought (SPEI-12) was associated with atmosphere indices. Significant resonance periods were found between El Nino southern oscillation (ENSO), the East Asian summer monsoon index (EASMI), and SPEI-12. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2073-4441 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1e341b3b418b40f977578a02f06bbb7Test http://www.mdpi.com/2073-4441/8/11/543Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....d1e341b3b418b40f977578a02f06bbb7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20734441 |
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