Analysis on the temporal-spatial distribution character and
effect factors of PM10 in the hinterland of Taklimakan
Desert and surrounding area |
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| Authors: | XinChun Liu YuTing Zhong Qing He XingHua Yang Ali Mamtimin and Wen Huo |
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| Institution: | 1. Institute of Desert Meteorology, CMA, Xinjiang Laboratory of Tree Ring Ecology, Key Laboratory of Tree-ring Physical and
Chemical Research of China Meteorological Administration, Urumqi, Xinjiang 830002, China
2. Desert Atmosphere and Environment Obser;1. Institute of Desert Meteorology, CMA, Xinjiang Laboratory of Tree Ring Ecology, Key Laboratory of Tree-ring Physical and
Chemical Research of China Meteorological Administration, Urumqi, Xinjiang 830002, China
2. Desert Atmosphere and Environment Obser;1. Institute of Desert Meteorology, CMA, Xinjiang Laboratory of Tree Ring Ecology, Key Laboratory of Tree-ring Physical and
Chemical Research of China Meteorological Administration, Urumqi, Xinjiang 830002, China
2. Desert Atmosphere and Environment Obser;1. Institute of Desert Meteorology, CMA, Xinjiang Laboratory of Tree Ring Ecology, Key Laboratory of Tree-ring Physical and
Chemical Research of China Meteorological Administration, Urumqi, Xinjiang 830002, China
2. Desert Atmosphere and Environment Obser;1. Institute of Desert Meteorology, CMA, Xinjiang Laboratory of Tree Ring Ecology, Key Laboratory of Tree-ring Physical and
Chemical Research of China Meteorological Administration, Urumqi, Xinjiang 830002, China
2. Desert Atmosphere and Environment Obser;1. Institute of Desert Meteorology, CMA, Xinjiang Laboratory of Tree Ring Ecology, Key Laboratory of Tree-ring Physical and
Chemical Research of China Meteorological Administration, Urumqi, Xinjiang 830002, China
2. Desert Atmosphere and Environment Obser |
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| Abstract: | In recent years, the physical and chemical properties of dust aerosols from the dust source area in northern China have attracted
increased attention. In this paper, Thermo RP 1400a was used for online continuous observation and study of the hinterland of
Taklimakan, Tazhong, and surrounding areas of Kumul and Hotan from 2004 to 2006. In combination with weather analysis during a
sandstorm in the Tazhong area, basic characteristics and influencing factors of dust aerosol PM10 have been summarized as below: (1)
The occurrence days of floating dust and blowing dust appeared with an increasing trend in Kumul, Tazhong and Hotan, while the
number of dust storm days did not significantly change. The frequency and intensity of dust weather were major factors affecting the
concentration of dust aerosol PM10 in the desert. (2) The mass concentration of PM10 had significant regional distribution characteristics,
and the mass concentration at the eastern edge of Taklimakan, Kumul, was the lowest; second was the southern edge of the desert,
Hotan; and the highest was in the hinterland of the desert, Tazhong. (3) High values of PM10 mass concentration in Kumul was from
March to September each year; high values of PM10 mass concentration in Tazhong and Hotan were distributed from March to August
and the average concentration changed from 500 to 1,000 g/m3, respectively. (4) The average seasonal concentration changes of
PM10 in Kumul, Tazhong and Hotan were: spring > summer > autumn > winter; the highest average concentration of PM10 in Tazhong,
was about 1,000 g/m3 in spring and between 400 and 900 g/m3 in summer, and the average concentration was lower in autumn and
winter, basically between 200 and 400 g/m3. (5) PM10 concentration during the sandstorm season was just over two times the concentration
of the non-sandstorm season in Kumul, Tazhong and Hotan. The average concentrations of sandstorm season in Tazhong
were 6.2 and 3.6 times the average concentrations of non-sandstorm season in 2004 and 2008, respectively. (6) The mass concentration
of PM10 had the following sequence during the dust weather: clear day < floating dust < floating and blowing dust < sandstorm.
The wind speed directly affects the concentration of PM10 in the atmosphere, the higher the wind speed, the higher the mass concentration.
Temperature, relative humidity and barometric pressure are important factors affecting the strength of storms, which could also
indirectly affect the concentration change of PM10 in the atmosphere. |
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| Keywords: | dust aerosol dust weather mass concentration effect factors Taklimakan Desert |
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