Aerosol optical properties over urban and industrial region of Northeast China by using ground-based sun-photometer measurement

Zhao, Huiling; Che, Huizheng; Zhang, Xiaoye; Ma, Yanhui; Wang, Yangfeng; Xu-xin, Wang; Liu, Chuang; Hou, Bo; Che, Haochi

doi:10.1016/j.atmosenv.2013.04.048

Cited by 55 publications

(44 citation statements)

References 32 publications

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“…However, few studies on air pollution and the long-term trend of change in air quality have been performed in northeasternern China [24][25][26]. Nearly one third of the resourcebased cities in China are located in the northeast [24], which is the area in which China's heavy industry is found.…”

mentioning

confidence: 99%

Characterization of Air Pollution Index and Its Affecting Factors in Industrial Urban Areas in Northeastern China

Gong¹,

Hu²,

Liu³

et al. 2015

Pol. J. Environ. Stud.

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confidence: 99%

Characterization of Air Pollution Index and Its Affecting Factors in Industrial Urban Areas in Northeastern China

Gong¹,

Hu²,

Liu³

et al. 2015

Pol. J. Environ. Stud.

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“…The higher AOD recorded in summer was the same as the result obtained for Shenyang (Figure 1), an inland urban site in Northeast China. However, the lower AOD recorded in winter at Dalian monitoring station was different from that recorded at Shenyang, which may due to lower levels of domestic heating in this season because of the warmer climate [41]. The comparably higher AOD values in summer are most likely to be a result of the larger amounts of water vapor in the atmosphere during this season.…”

Section: Number Of Days Number Of Instantaneous Datamentioning

confidence: 68%

“…The Ångström exponents (440-870 nm) were 0.99˘0.39, 1.21˘0.27, 1.26˘0.25, and 0.94˘0.32 in spring, summer, autumn, and winter, respectively. The values of the Ångström exponent in all four seasons were higher than in other urban cities in Northeast China, which may indicate a dominance of fine particles in this area [41]. Wan [62] reported that the higher concentrations of SO 2 and NO x in winter over Dalian may be related to the secondary production of the fine pollutants via photochemical reactions.…”

Section: Number Of Days Number Of Instantaneous Datamentioning

confidence: 99%

“…However, few studies have been reported using ground-based measurements of the optical properties of aerosols over Northeast China [36][37][38][39]. Zhao [40,41] described the distribution and variation in the optical properties of aerosols over urban sites in Northeast China and Wang [42] analyzed the optical properties of aerosols over the regional background in Northeast China. Wu [43,44] studied the optical properties of column aerosols at a semi-arid rural site in Northeast China.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Optical Properties of Aerosols over the Coastal Region at Dalian, Northeast China

et al. 2016

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Abstract:Measurements of the aerosol optical depth (AOD) and the Ångström exponent were retrieved from level 1.5 data obtained by the CE318 sun photometer at Dalian monitoring station from April 2007 to April 2012 to characterize the aerosol spatial and temporal characteristics in this coastal region of Northeast China. The results suggest that the highest mean˘SD value for the AOD over Dalian occurred in the month of July (0.86˘0.45), whereas a lower value was observed in the month of January (0.42˘0.31). The monthly mean Ångström exponent was at a maximum (about 1.27) in September and October and the minimum value of about 0.60 was recorded in March. The frequency distributions of the AOD and Ångström exponent at Dalian both presented a single peak distribution, with peak values of 0.26 and 1.06, respectively. The scatter grams of the AOD and Ångström exponent suggested that the aerosol size in Dalian was affected by both fine and coarse particles in different seasons. The spectral difference in Ångström exponent wavelength pairs between 440-675 and 675-870 nm indicate that high AOD 440 nm values (>1.50) could be clearly identified by the fine mode growth in summer and the addition of coarse mode particles in spring over Dalian. The AOD 440 nm value on a foggy day was almost 2.15 times larger than that on a day with high levels of dust. The Ångström exponents (440-870 nm) were about 0.13 and 1.46 on the days with high levels of dust and on the foggy days, respectively.

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“…Wang et al (2012) identified central Liaoning Province as one of the key areas for regional air pollution prevention and control because of its growing population and economic development. Zhao et al (2012Zhao et al ( . 2013a, Xia et al (2007) and Wang et al (2010) have analyzed aerosol optical properties and direct radiative forcing in northern China.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Particulate Matter during Haze and Fog (Pollution) Episodes over Northeast China, Autumn 2013

Yang

Zhao

2015

Aerosol Air Qual. Res.

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Mass concentrations of particulate matter (PM), including PM 1.0 , PM 2.5 and PM 10 , were measured from October 13 th to November 30 th 2013 at eight sites in Northeast China to evaluate their variations during pollution periods. Five major pollution periods were identified during the autumn of 2013. The maximum daily average PM 2.5 concentrations were 437 ± 85 µg/m 3 and 322 ± 50 µg/m 3 in Harbin and Shenyang, respectively. The minimum was 75 ± 28 µg/m 3 in Dandong. The presence of finer particles was significantly related to visibility degradation during pollution periods. Wind speeds had a negative correlation with PM concentrations, while high relative humidity (RH) favored the formation of haze in Northeast China.Visibility on non-hazy days was approximately 2.5-3.0 times greater than that on hazy days. During hazy days, the PM 1.0 :PM 2.5 ratios were 0.89 ± 0.04, 0.85 ± 0.04 and 0.91 ± 0.04 at Anshan, Shenyang and Dandong, respectively. These results show that PM 1.0 was the dominant particle pollutant in Northeast China during periods of pollution. High RH and low wind speeds during hazy days may favor the accumulation of atmospheric pollutants. The results of this study provide useful information toward recognizing air pollution episode characteristics in Northeast China.

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Aerosol optical properties over urban and industrial region of Northeast China by using ground-based sun-photometer measurement

Cited by 55 publications

References 32 publications

Characterization of Air Pollution Index and Its Affecting Factors in Industrial Urban Areas in Northeastern China

Characterization of Air Pollution Index and Its Affecting Factors in Industrial Urban Areas in Northeastern China

Investigation of the Optical Properties of Aerosols over the Coastal Region at Dalian, Northeast China

Characteristics of Particulate Matter during Haze and Fog (Pollution) Episodes over Northeast China, Autumn 2013

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