[1]LIU He,DENG Chenhui,SHAO Jingan,et al.Spatiotemporal Variations of Precipitation and the North-South Differences in the Qinling Mountains from 1964 to 2017[J].Research of Soil and Water Conservation,2021,28(02):210-216+223.
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Spatiotemporal Variations of Precipitation and the North-South Differences in the Qinling Mountains from 1964 to 2017
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
210-216+223
Column:
Public date:
2021-02-06
- Title:
- Spatiotemporal Variations of Precipitation and the North-South Differences in the Qinling Mountains from 1964 to 2017
- Keywords:
- precipitation changes; north-south differences; before and after the abrupt temperature changes; Qinling Mountains
- CLC:
- P426.6; S161.6
- DOI:
- -
- Abstract:
- In order to clarify the characteristics of the temporal and spatial changes of precipitation in the Qinling Mountains, provide a climate basis for the ecological environment, based on the monthly precipitation data of 32 meteorological stations in the Qinling area from 1964 to 2017, AUSPLIN interpolation method was used to convert those data to regional surface data. The characteristics of precipitation changes and the differences between North and South in the Qinling Mountainous area under different time and space scales from 1964 to 2017 were studied by using wavelet analysis and trend analysis methods. The results show that:(1)the average annual precipitation in the Qinling Mountains had decreased in the past 54 years, with a rate of -11.95 mm/decade; there is an obvious periodicity and significant spatial difference in precipitation changes. The precipitation is mainly concentrated in the central and southern regions.(2)on the seasonal scale, there had been a significant seasonal difference in precipitation changes in the Qinling Mountains in the past 54 years; the spatial reduction trend was particularly significant in spring at high altitudes.(3)the precipitation change in Qinling Mountain had obvious difference before and after the sudden temperature change; before the sudden temperature change, the decreasing trend was dominant, which reached the significance level in 82.21% of area; after the sudden change, the increasing trend was dominant, which accounted for 65.60% of the area;(4)there was a clear north-south difference in precipitation changes in the Qinling Mountains; in the past 54 years, the average annual precipitation on the northern slope had decreased, with an average rate of -7.1 mm/decade, and it had an increasing trend the southern slope, with a rate of 35.1 mm/decade; before the mutation, the change trend of precipitation on the north slope was not obvious and the increasing trend was mainly on the south slope. In the past 54 years, the south area of the Qinling Mountains had experienced high rainfall intensity. Natural disasters such as drought and extreme precipitation were likely to occur in the summer and winter, which threatened the safety of life and property. The prevention of droughts and floods should be strengthened.
- References:
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Last Update:
2021-02-10