Vertical Distribution of Dust Aerosol Mass Concentration in Hinterland of the Taklimakan Desert

Journal of Desert Research ›› 2012, Vol. 32 ›› Issue (4): 1045-1052.

• Weather and Climate • Previous Articles Next Articles

Vertical Distribution of Dust Aerosol Mass Concentration in Hinterland of the Taklimakan Desert

LIU Xin-chun1,2, ZHONG Yu-ting1,2, HE Qing1,2, YANG Xing-hua1,2, Ali Mamtimin1,2

1.Xinjiang Laboratory of Tree Ring Ecology/Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration, Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;
2.Taklimakan Desert Atmosphere and Environment Observation Experiment Station, Institute of Desert Meteorology, China Meteorological Administration, Tazhong 841000, Xinjiang, China

Received:2011-10-24 Revised:2011-11-29 Online:2012-07-20 Published:2012-07-20

Abstract

Abstract: The mass concentration of dust aerosol at different heights were observed continuously from January 2009 to February 2010 in the Tazhong Atmosphere Environment Observation Station in the Taklimakan Desert hinterland by making use of instruments of Grimm 1.108 Grain Size Analyzer, Thermo RP 1 400 a particle monitor, and TSP sampler. Some results are obtained as follows: (1) The mass concentration of PM10 at 80-m height was the highest, but the mass concentration of PM2.5or PM10 at 80-m height was lower obviously than that of PM10 at 4-m height, and the mass concentration of PM1.0 at 80 m height was the lowest. Occurrence of frequent dust weather events has resulted in the above mass concentration pattern. (2) The PMx mass concentration gradually decreased from midnight to sunrise with the lowest value at 08:00, and then the mass concentration gradually increased with the highest concentration around 18:00, and then decreased again. It was exactly the same with the change of wind speed. (3) High monthly average mass concentration of TSP mainly appeared from March to September, and the highest concentration was in April and May. Also, high monthly average mass concentration of PMx mainly appeared from March to September, with the highest PM10 concentration of 846.0 μg·m-3 at 4 m height appeared in May. (4) The aerosol mass concentration of different diameters in the sand weather follows an order of in clear day<in floating dust day<in blowing sand day<in sandstorm day. The value of PM10/TSP in clear day was higher than that in floating dust day, and that in floating dust day was much higher than that in blowing sand day and sandstorm day. (5) During a dust weather process, dust aerosol mass concentration gradually decreased with the decrease of particle size. A peak value of dust aerosol mass concentration occurred every 3~4 days at different heights and particle diameters, which was accordant with the strengthening variation of dust weather.

Key words: dust aerosol, dust weather, mass concentration, vertical distribution, the Taklimakan Desert

CLC Number:

X169

LIU Xin-chun, ZHONG Yu-ting, HE Qing, YANG Xing-hua, AI Li-·Mai-mai-ti-ming. Vertical Distribution of Dust Aerosol Mass Concentration in Hinterland of the Taklimakan Desert[J]. Journal of Desert Research, 2012, 32(4): 1045-1052.

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Vertical Distribution of Dust Aerosol Mass Concentration in Hinterland of the Taklimakan Desert

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