The Physical and Chemical Characteristics of Desert Aerosols in the HEIFE Region

Ren, Lixin; Lei, W.; Lu, Wen-Hsiang; Zhang, Wen; Zhu, Guofeng

doi:10.2151/jmsj1965.73.6_1263

Cited by 7 publications

(3 citation statements)

References 7 publications

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“…7b) exhibited that coarse particle larger than 5 mm diameter was dominant during springtime and the domain mode is shifted to 2 to 3 mm diameter in the case of July 2002. These features were nearly consistent with those obtained at the southwestern edge of the Badain-Jaran Desert, China (Ren et al 1995), although their Unlike the emission of anthropogenic particles; the emission of dust particles is strongly dependent of the magnitude and the number of duststorm. Accordingly, annual and seasonal variations of number concentration of desert particles are large, and a longer time monitoring for information of number-size of desert particles will be required to understand the climatological situation of dust particle at the source region.…”

Section: Duststorm Events During Springtime Insupporting

confidence: 86%

“…For the understanding of these processes, information of aeolian dust particle size and concentration is of primary importance especially in the source regions. Until now, observational studies of aerosol concentration were carried out in the Sahara Desert (e.g., Schü tz and Jaenicke 1974; d 'Almeida and Schü tz 1983;Fouquart et al 1987;Tanré et al 2001) and in the East Asia (e.g., Okada and Kai 1995;Ren et al 1995;Zaizen et al 1995;Chun et al 2001;Zhang et al 2003). Nevertheless, many of these observations were conducted not at the source areas but at the surrounding areas and/or in the urban areas.…”

Section: Introductionmentioning

confidence: 99%

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Observation of Number Concentration of Desert Aerosols in the South of the Taklimakan Desert, China

Mikami¹,

Aoki²,

Ishizuka

et al. 2005

Journal of the Meteorological Society of Japan

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Observation of number concentration of aerosol particles in the south of the Taklimakan Desert, China, was conducted using optical particle counter (OPC). Observations were made in the edge of the small oasis Qira, which is located in the southern Tarim Basin, during the springtime in 2002, 2003, and 2004. For the comparison of regional changes, observation at gobi desert, which is 13.7 km southeast of the oasis site, was also conducted in July 2002.It was found that the number concentration of aerosol particles, especially in the coarse particles, showed significant increases after the duststorm. Averaged number concentrations of aerosol particles in ) a local maximum number concentration at 2 to 3 mm diameter is commonly found and 2) the coarse particle larger than 5 mm diameter is dominant in the each volume size distribution. However, annual variation of number concentrations during springtime is large. This is because the emission of dust particle of each year strongly depends on the magnitude and the number of duststorm event.The time variations of number concentration of aerosol particles at the oasis site and the gobi site showed a good coincidence with those of coarse particles larger than 1 mm diameter. It is suggested that these variations are not controlled by the local circulation induced by the oasis effect but by the diurnal circulation between the Kunlun Mountains and the Tarim Basin.

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Section: Duststorm Events During Springtime Insupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Observation of Number Concentration of Desert Aerosols in the South of the Taklimakan Desert, China

Mikami¹,

Aoki²,

Ishizuka

et al. 2005

Journal of the Meteorological Society of Japan

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show abstract

“…[2] The rapid economic development and population expansion since the mid-1970s has led to heavy aerosol loading over much of China [Luo et al, 2001;Qiu and Yan, 2000;Xia et al, 2007a;Zong et al, 2005]. Studies indicate links between fine particulate matter and numerous health problems because these particles are so small that they are able to penetrate the deepest parts of the lungs [Ren et al, 1999]. It is believed that aerosols influence plant growth and carbon cycling through their effects on the surface energy budget [Chameides et al, 1999].…”

Section: Introductionmentioning

confidence: 99%

Aerosol optical properties and radiative effects in the Yangtze Delta region of China

et al. 2007

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[1] One year's worth of aerosol and surface irradiance data from September 2005 to August 2006 were obtained at Taihu, the second supersite for the East Asian Study of Tropospheric Aerosols: An International Regional Experiment (EAST-AIRE). Aerosol optical properties derived from measurements by a Sun photometer were analyzed. The aerosol data were used together with surface irradiance data to quantitatively estimate aerosol effects on surface shortwave radiation (SWR) and photosynthetically active radiation (PAR). The annual mean aerosol optical depth at 500 nm is 0.77, and mean Å ngstrom wavelength exponent is 1.17. The annual mean aerosol single scattering albedo and mean aerosol asymmetry factor at 440 nm are 0.90 and 0.72, respectively. Both parameters show a weak seasonal variation, with small values occurring during the winter and larger values during the summer. Clear positive relationships between relative humidity and aerosol properties suggest aerosol hygroscopic growth greatly modifies aerosol properties. The annual mean aerosol direct radiative forcing at the surface (ADRF) is À38.4 W m À2 and À17.8 W m À2 for SWR and PAR, respectively. Because of moderate absorption, the instantaneous ADRF at the top of the atmosphere derived from CERES SSF data is close to zero. Heavy aerosol loading in this region leads to À112.

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Recent researches on aerosol in china

Wang

Zhang

2001

Adv. Atmos. Sci.

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The Physical and Chemical Characteristics of Desert Aerosols in the HEIFE Region

Abstract: Measurements of the physical and chemical characteristics of desert aerosols in the Heihe region (North-

Cited by 7 publications

References 7 publications

Observation of Number Concentration of Desert Aerosols in the South of the Taklimakan Desert, China

Observation of Number Concentration of Desert Aerosols in the South of the Taklimakan Desert, China

Aerosol optical properties and radiative effects in the Yangtze Delta region of China

Recent researches on aerosol in china

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