[1]QI Jiayu,Bateer·bake.Spatiotemporal Distribution of Drought in Northern Xinjiang Based on Relative Moisture Index[J].Research of Soil and Water Conservation,2021,28(03):223-228.
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Spatiotemporal Distribution of Drought in Northern Xinjiang Based on Relative Moisture Index
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 03
Page number:
223-228
Column:
Public date:
2021-04-20
- Title:
- Spatiotemporal Distribution of Drought in Northern Xinjiang Based on Relative Moisture Index
- Keywords:
- meteorological drought; temporal and spatial distribution; relative moisture index; northern Xinjiang
- CLC:
- P429
- DOI:
- -
- Abstract:
- Based on the daily meteorological data of 26 major meteorological stations in north Xinjiang from 1961 to 2016, the national standard relative moisture index(M)was selected as the drought index, and the annual and seasonal time scales were used to explore the interannual variation and spatial distribution characteristics of drought intensity and frequency in northern Xinjiang. The results show that the relative moisture index can well characterize the typical drought year. According to the analysis on data covering 56 years, the drought intensity in north Xinjiang generally shows the decreasing trend. Compared with the drought intensity in various years, the drought was the lightest in the early 21st century, the drought was the most severe in the 1960s and 1970s, and the spatial distribution showed a trend of high in the southeast and low in the northwest. The frequencies of light drought and moderate drought in the northern Xinjiang region were increasing, while the frequencies of annual severe drought and extra drought were decreasing. The frequency of severe drought in northern Xinjiang over the years was significantly higher than that of other grades, and the frequency of moderate drought was slightly higher than that of light drought and extra drought. On the seasonal scale, the drought intensity in spring and summer in northern Xinjiang was significantly higher than that in autumn and winter. Among the drought frequencies of different grades in each season, the frequency of light drought in autumn was the highest, the frequency of moderate and severe drought in summer was the highest, and the frequency of extra drought in spring was the highest.
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Last Update:
2021-04-20