1 Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China; 2 Desert Atmosphere and Environment Observation Experiment of Taklimakan Station, Tazhong 841000, China
Near-surface sand-dust horizontal flux in Tazhong—the hinterland of the Taklimakan Desert
1 Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China; 2 Desert Atmosphere and Environment Observation Experiment of Taklimakan Station, Tazhong 841000, China
摘要 Tazhong is the hinterland and a sandstorm high-frequency area of the Taklimakan Desert. However, little is known about the detailed time-series of aeolian sand transport in this area. An experiment to study the sand-dust horizontal flux of near-surface was carried out in Tazhong from January to December 2009. By measuring the sand-dust horizontal flux throughout sixteen sand-dust weather processes with a 200-cm tall Big Spring Number Eight (BSNE) sampler tower, we quantitatively analyzed the vertical variation of the sand-dust horizontal flux. And the total sand-dust horizontal flux of different time-series that passed through a section of 100 cm in width and 200 cm in height was estimated combining the data of saltation movement continuously recorded by piezo-electric saltation sensors (Sensit). The results indicated that, in the surface layer ranging from 0–200 cm, the intensity of sand-dust horizontal flux decreased with the increase of the height, and the physical quantities obeyed power function well. The total sand-dust horizontal flux of the sixteen sand-dust weather processes that passed through a section of 100 cm in width and 200 cm in height was about 2,144.9 kg, the maximum of one sand-dust weather event was about 396.3 kg, and the annual total sand-dust horizontal flux was about 3,903.2 kg. The high levels of aeolian sand transport occurred during daytime, especially from 13:00 to 16:00 in the afternoon. We try to develop a new method for estimation of the detailed time-series of aeolian sand transport.
Abstract: Tazhong is the hinterland and a sandstorm high-frequency area of the Taklimakan Desert. However, little is known about the detailed time-series of aeolian sand transport in this area. An experiment to study the sand-dust horizontal flux of near-surface was carried out in Tazhong from January to December 2009. By measuring the sand-dust horizontal flux throughout sixteen sand-dust weather processes with a 200-cm tall Big Spring Number Eight (BSNE) sampler tower, we quantitatively analyzed the vertical variation of the sand-dust horizontal flux. And the total sand-dust horizontal flux of different time-series that passed through a section of 100 cm in width and 200 cm in height was estimated combining the data of saltation movement continuously recorded by piezo-electric saltation sensors (Sensit). The results indicated that, in the surface layer ranging from 0–200 cm, the intensity of sand-dust horizontal flux decreased with the increase of the height, and the physical quantities obeyed power function well. The total sand-dust horizontal flux of the sixteen sand-dust weather processes that passed through a section of 100 cm in width and 200 cm in height was about 2,144.9 kg, the maximum of one sand-dust weather event was about 396.3 kg, and the annual total sand-dust horizontal flux was about 3,903.2 kg. The high levels of aeolian sand transport occurred during daytime, especially from 13:00 to 16:00 in the afternoon. We try to develop a new method for estimation of the detailed time-series of aeolian sand transport.
The National Natural Science Foundation of China (41175017), the Central Scientific Research Institute of the public basic scientific research business professional ( IDM201103), and the R&D Special Fund for Public Welfare Industry (Meteorology) (GYHY201106025)
通讯作者:
Qing HE
E-mail: qinghe@idm.cn
引用本文:
XingHua YANG, Qing HE, Mamtimin ALI, Wen HUO XinChun LIU. Near-surface sand-dust horizontal flux in Tazhong—the hinterland of the Taklimakan Desert[J]. 干旱区科学, 2013, 5(2): 199-206.
XingHua YANG, Qing HE, Mamtimin ALI, Wen HUO XinChun LIU. Near-surface sand-dust horizontal flux in Tazhong—the hinterland of the Taklimakan Desert. Journal of Arid Land, 2013, 5(2): 199-206.
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