A study on the effects of soil moisture, air humidity, and air temperature on wind speed threshold for dust emissions in the Taklimakan Desert

Xinghua Yang, Chenglong Zhou, Wen Huo, Fan Yang, Xinchun Liu and Ali Mamtimin ()
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Xinghua Yang: Institute of Desert Meteorology/Taklimakan Desert Meteorology Field Experiment Station, China Meteorological Administration
Chenglong Zhou: Institute of Desert Meteorology/Taklimakan Desert Meteorology Field Experiment Station, China Meteorological Administration
Wen Huo: Institute of Desert Meteorology/Taklimakan Desert Meteorology Field Experiment Station, China Meteorological Administration
Fan Yang: Institute of Desert Meteorology/Taklimakan Desert Meteorology Field Experiment Station, China Meteorological Administration
Xinchun Liu: Institute of Desert Meteorology/Taklimakan Desert Meteorology Field Experiment Station, China Meteorological Administration
Ali Mamtimin: Institute of Desert Meteorology/Taklimakan Desert Meteorology Field Experiment Station, China Meteorological Administration

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2019, vol. 97, issue 3, No 5, 1069-1081

Abstract: Abstract Soil and the atmospheric conditions are important factors that affect wind speed threshold of surface dust emissions. Based on the observed data of surface dust emissions in the Taklimakan Desert collected from March 2008 to February 2018, the effects of soil moisture, air humidity (vapor pressure), and air temperature on wind speed threshold were analyzed in this study. The results showed that the accumulated time of dust emissions over the decade was 3609.8 h, thereby accounting for 4.1% of the total observation time. In addition, the duration of dust emission in the four seasons were consistent with the pattern of summer > spring > autumn > winter. When the soil moisture is above 3.0–4.0%, the wind speed threshold for dust emission increases with increasing soil moisture. When the vapor pressure is above 10–15 kPa, the wind speed threshold for dust emission increases with increasing vapor pressure. There was a negative correlation between air temperature and the wind speed threshold for dust emission. When the air temperature was higher than 0.0 °C, the soil moisture decreased with increasing air temperature, and the wind speed threshold for dust emission was lower.

Keywords: Dust emission; Wind speed threshold; Soil moisture; Air humidity; Air temperature (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1007/s11069-019-03686-1

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