[1]GONG Xuewei,HE Xuemin,LYU Guanghui,et al.Vertical Distribution Characteristics and the Main Meteorological Factors of Floating Dust in a Desert-oasis Ecotone of Ebinur Basin, Xinjiang Uygur Autonomous Region[J].Research of Soil and Water Conservation,2017,24(01):96-102.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 01
Page number:
96-102
Column:
Public date:
2017-02-28
- Title:
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Vertical Distribution Characteristics and the Main Meteorological Factors of Floating Dust in a Desert-oasis Ecotone of Ebinur Basin, Xinjiang Uygur Autonomous Region
- Author(s):
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GONG Xuewei1,2, HE Xuemin2,3, LYU Guanghui2,3, CHEN Yue1,2
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1. College of Resources and Environment Science, Xinjiang University, Urumqi 830046, China;
2. Key Laboratory of Oasis Ecology, Urumqi 830046, China;
3. Institute of Arid Ecology and Environment, Xinjiang University, Urumqi 830046, China
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- Keywords:
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desert-oasis ecotone; floating dust; vertical distribution; meteorological-floating dust multiple regression analysis
- CLC:
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X831
- DOI:
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- Abstract:
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Six particle size interval (0.3 μm≤x < 0.5 μm, 0.5 μm≤x < 1.0 μm, 1.0 μm≤x < 3.0 μm, 3.0 μm≤x < 5.0 μm, 5.0 μm≤x < 10.0 μm, 10.0 μm≤x) floating dust concentrations and meteorological data on seven kinds of height (2, 3, 6, 12, 15, 21, 27 m) were measured by the laser dust particle counter and automatic observing system for meteorological gradient to study vertical distribution characteristics and the main meteorological factors of floating dust in a Desert-oasis Ecotone of Ebinur Basin, Xinjiang Uygur Autonomous Region. The results showed that the average contribution of 0.3 μm≤x < 3.0 μm among different size interval floating dusts accounted for the highest, add up to 97.6%. The distribution rule of floating dust overall contribution (0.3 μm≤x) on the seven layer heights was high on both sides of the middle low (C3m > C6m > C2m > C21m > C27m > C12m > C15m), which could be called ‘dumbbell effect’. Analogue data obtained from meteorological-floating dust regression equation and measured data showed the significantly positive correlation (p < 0.05), and the diurnal variation trend of analogue data was similar to the measured data. Wind speed had the significant positive and negative effects on floating dust concentrations (wind speed less than the critical value in favor of floating dust accumulation, whereas promoted floating dust diluted) (p < 0.01), and floating dust concentration reduced obviously (p < 0.01) with the increase of relative humidity.