Wintertime aerosol optical properties in Lanzhou, Northwest China: Emphasis on the rapid increase of aerosol absorption under high particulate pollution

Guan, Xu; Wang, Min; Du, Tao; Tian, Pengfei; Zhang, Naiyue; Shi, Jun; Yi, Chen; Zhang, Lei; Zhang, Min; Song, Xin; Sun, Yunqiang

doi:10.1016/j.atmosenv.2020.118081

Cited by 24 publications

(12 citation statements)

References 90 publications

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“…8 . Relatively low SSA in P1 indicated strong aerosol absorption in Lanzhou ( Tian et al, 2018a ; Guan et al, 2021 , 2022 ). Generally, lower aerosol scattering/absorption coefficient corresponded to higher O 3 while higher SSA related to higher O 3 both in P1 and P2.…”

Section: Resultsmentioning

confidence: 99%

“…Multiple online instruments were deployed to continuously measure the PM concentrations with different sizes, aerosol optical properties, chemical compositions, gases, atmospheric visibility, and meteorological parameters. Detailed introduction of the LACMS site, instruments, and data are in Table S1 and available elsewhere ( Du et al, 2020 ; Guan et al, 2021 ; Wang et al, 2021 ). PM 2.5 chemical composition data at the LACMS site were missing from February 10, 2020 to March 3, 2020.…”

Section: Methodsmentioning

confidence: 99%

“…The scattering Ångström exponent (SAE) is a parameter related to aerosol size that was calculated as follows ( Guan et al, 2021 ):

where λ 1 = 520 and λ 2 = 450 nm. SAE is relatively low for large particles and high for small particles.…”

Section: Methodsmentioning

confidence: 99%

“…The revised Interagency Monitoring of Protected Visual Environments (IMPROVE) algorithm ( Pitchford et al, 2007 ) was used to evaluate the effect of chemical species on aerosol light extinction. The algorithm details are available in a recent study ( Guan et al, 2021 ) and in the Supplementary materials.…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Changes in physical and chemical properties of urban atmospheric aerosols and ozone during the COVID-19 lockdown in a semi-arid region

Du²,

Song³

et al. 2022

Atmospheric Environment

Self Cite

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The scattering Ångström exponent (SAE) is a parameter related to aerosol size that was calculated as follows ( Guan et al, 2021 ):

where λ 1 = 520 and λ 2 = 450 nm. SAE is relatively low for large particles and high for small particles.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Changes in physical and chemical properties of urban atmospheric aerosols and ozone during the COVID-19 lockdown in a semi-arid region

Du²,

Song³

et al. 2022

Atmospheric Environment

Self Cite

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“…However, scholars have focused on the diurnal variations or case analysis of these factors over Wuhan. Moreover, the variation in aerosol absorption under different particulate pollution conditions is poorly understood, although it has a major impacts on the aerosol radiative effect, as reported by Guan, et al [47]. Therefore, there remains a lack of analysis of the seasonal changes considering particulate air pollution conditions.…”

Section: Introductionmentioning

confidence: 99%

Black Carbon over Wuhan, China: Seasonal Variations in Its Optical Properties, Radiative Forcing and Contribution to Atmospheric Aerosols

Fan

Jin

et al. 2021

Remote Sensing

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As an important fraction of light-absorbing particles, black carbon (BC) has a significant warming effect, despite accounting for a small proportion of total aerosols. A comprehensive investigation was conducted on the characteristics of atmospheric aerosols and BC particles over Wuhan, China. Mass concentration, optical properties, and radiative forcing of total aerosols and BC were estimated using multi-source observation data. Results showed that the BC concentration monthly mean varied from 2.19 to 5.33 μg m−3. The BC aerosol optical depth (AOD) maximum monthly mean (0.026) occurred in winter, whereas the maximum total AOD (1.75) occurred in summer. Under polluted-air conditions, both aerosol radiative forcing (ARF) and BC radiative forcing (BCRF) at the bottom of the atmosphere (BOA) were strongest in summer, with values of −83.01 and −11.22 W m−2, respectively. In summer, ARF at BOA on polluted-air days was more than two-fold that on clean-air days. In addition, compared with clean-air days, BCRF at BOA on polluted-air days was increased by 76% and 73% in summer and winter, respectively. The results indicate an important influence of particulate air pollution on ARF and BCRF. Furthermore, the average contribution of BCRF to ARF was 13.8%, even though the proportion of BC in PM2.5 was only 5.1%.

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Seasonal variation of aerosol optical properties in a coastal city of southeast China: Based on one year of measurements

Zhang

Yin

et al. 2023

Atmospheric Environment

View full text Add to dashboard Cite

Wintertime aerosol optical properties in Lanzhou, Northwest China: Emphasis on the rapid increase of aerosol absorption under high particulate pollution

Cited by 24 publications

References 90 publications

Changes in physical and chemical properties of urban atmospheric aerosols and ozone during the COVID-19 lockdown in a semi-arid region

Changes in physical and chemical properties of urban atmospheric aerosols and ozone during the COVID-19 lockdown in a semi-arid region

Black Carbon over Wuhan, China: Seasonal Variations in Its Optical Properties, Radiative Forcing and Contribution to Atmospheric Aerosols

Seasonal variation of aerosol optical properties in a coastal city of southeast China: Based on one year of measurements

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