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

Zhao, Huiling; Che, Huizheng; Wang, Yaqiang; Wang, Hong; Ma, Yanhui; Wang, Yangfeng; Zhang, Xiaoye

doi:10.3390/atmos7080103

Cited by 7 publications

(6 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…China has become one of the largest aerosol sources in the world associated with its rapid economic development, and this has caused significant effects on local environments and regional climate (Che et al, 2005;Xia, 2010;Li et al, 2016;Yang et al, 2018Yang et al, , 2019bZhao et al, 2019;. There have been numerous studies that have focused on aerosol optical properties obtained though groundbased remote-sensing methods in China (Luo et al, 2002;Li et al, 2003;Duan and Mao, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…There have been numerous studies that have focused on aerosol optical properties obtained though groundbased remote-sensing methods in China (Luo et al, 2002;Li et al, 2003;Duan and Mao, 2007). Some previous research has paid more attention to aerosol's optical properties and its radiative effects over the urban industrial areas, as well as at coastal sites in northeastern and eastern China Xin et al, 2011;Xia et al, 2007;Zhao et al, 2016;Wu et al, 2012;Shen et al, 2019). Many studies of aerosol optical properties were conducted in northern China with high aerosol loadings, such as the Beijing-Tianjin-Hebei region Xia et al, 2013;Fan et al, 2006;Xie et al, 2008;Zhang et al, 2019;Yang et al, 2019a;Zheng et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spatial distribution of aerosol microphysical and optical properties and direct radiative effect from the China Aerosol Remote Sensing Network

et al. 2019

Self Cite

View full text Add to dashboard Cite

Abstract. Multi-year observations of aerosol microphysical and optical properties, obtained through ground-based remote sensing at 50 China Aerosol Remote Sensing Network (CARSNET) sites, were used to characterize the aerosol climatology for representative remote, rural, and urban areas over China to assess effects on climate. The annual mean effective radii for total particles (ReffT) decreased from north to south and from rural to urban sites, and high total particle volumes were found at the urban sites. The aerosol optical depth at 440 nm (AOD440 nm) increased from remote and rural sites (0.12) to urban sites (0.79), and the extinction Ångström exponent (EAE440–870 nm) increased from 0.71 at the arid and semi-arid sites to 1.15 at the urban sites, presumably due to anthropogenic emissions. Single-scattering albedo (SSA440 nm) ranged from 0.88 to 0.92, indicating slightly to strongly absorbing aerosols. Absorption AOD440 nm values were 0.01 at the remote sites versus 0.07 at the urban sites. The average direct aerosol radiative effect (DARE) at the bottom of atmosphere increased from the sites in the remote areas (−24.40 W m−2) to the urban areas (−103.28 W m−2), indicating increased cooling at the latter. The DARE for the top of the atmosphere increased from −4.79 W m−2 at the remote sites to −30.05 W m−2 at the urban sites, indicating overall cooling effects for the Earth–atmosphere system. A classification method based on SSA440 nm, fine-mode fraction (FMF), and EAE440–870 nm showed that coarse-mode particles (mainly dust) were dominant at the rural sites near the northwestern deserts, while light-absorbing, fine-mode particles were important at most urban sites. This study will be important for understanding aerosol climate effects and regional environmental pollution, and the results will provide useful information for satellite validation and the improvement of climate modelling.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatial distribution of aerosol microphysical and optical properties and direct radiative effect from the China Aerosol Remote Sensing Network

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Larger extinctions for total and fine-mode particles were found for RH 80-100% compared with lower values at Shenyang (AODt 0.94, AODf~0.89), Fushun (AODt~0.86, AODf~0.79), Dalian (AODt~1.29, AODf~1.22), and Longfengshan (AODt~0.43, AODf~0.41), respectively. The water vapor at Dalian evidently was sufficient to increase the extinction caused by the ambient aerosols-especially because of the larger sea salt component-compared with the other three sites (H. Zhao et al, 2016).…”

Section: Aodsmentioning

confidence: 87%

“…For example, Wu et al (, ) studied aerosol optical properties at a semiarid rural site in NE China, and H. Zhao et al (, ) described the distributions and aerosol optical properties and assessed the direct radiative effect in the multiple cities in NE China. P. Wang et al () analyzed the regional background aerosol optical characteristics of NE China while H. Zhao et al () investigated the optical properties of aerosols in coastal regions of NE China. Xia, Chen, Li, et al () studied the aerosol optical properties and radiative effects at Liaozhong, a suburban site in NE China.…”

Section: Introductionmentioning

confidence: 99%

Multiyear Ground‐Based Measurements of Aerosol Optical Properties and Direct Radiative Effect Over Different Surface Types in Northeastern China

et al. 2018

Self Cite

View full text Add to dashboard Cite

Aerosol microphysical and optical properties as well as aerosol direct radiative effect (ADRE) were measured at a few ground sites to investigate aerosol optical‐radiative characteristics in northeastern China. Bimodal size distributions showed a dominance of fine mode particles at Shenyang, a megacity, and more impacts from larger particles at Fushun and Dalian, industrial and coastal sites, respectively. High aerosol optical depths at 440 nm in July (0.67–1.25) were ascribed to hygroscopic effects or cloud processing. Single scattering albedos at 440 nm show strong to moderate absorption at the urban and industrial sites (0.84–0.86) and weaker absorption at the coastal and rural sites (0.92–0.94). The single scattering albedo wavelength dependence implied influences of dust at the urban, industrial, and coastal regions (shorter wavelengths) and biomass emissions at the rural site (longer wavelengths). Absorptive aerosol optical depths at the urban and industrial sites were ~2.5 and 3.7 times higher than at the coastal and rural sites. Large negative ADREs at the bottom of the atmosphere at the urban and industrial sites implied strong surface cooling and the larger ADREs at the top of the atmosphere at the coastal site indicated more cooling of the Earth‐atmosphere system. The main aerosol types at the urban and industrial sites were mixed absorbing particles, while weakly‐absorbing fine mode particles dominated the coastal and rural sites. This study provides new information on the aerosol distributions and potential regional climate effects of aerosols in northeastern China.

show abstract

“…In recent years, an increasing number of scientific studies have addressed aerosol levels, chemical compositions, and TG levels and sources in Chinese coastal regions. Most of these studies have focused on the cities of Dalian [15][16][17], Qingdao [18,19], Guangzhou [20], and Shanghai [21,22]. However, each of these studies was conducted in one city and analyzed the change characteristics of only a single pollutant.…”

Section: Introductionmentioning

confidence: 99%

Variation Characteristics and Transportation of Aerosol, NO2, SO2, and HCHO in Coastal Cities of Eastern China: Dalian, Qingdao, and Shanghai

Xie

et al. 2021

Remote Sensing

View full text Add to dashboard Cite

This paper studied the method for converting the aerosol extinction to the mass concentration of particulate matter (PM) and obtained the spatio-temporal distribution and transportation of aerosol, nitrogen dioxide (NO2), sulfur dioxide (SO2), and formaldehyde (HCHO) based on multi-axis differential optical absorption spectroscopy (MAX-DOAS) observations in Dalian (38.85°N, 121.36°E), Qingdao (36.35°N, 120.69°E), and Shanghai (31.60°N, 121.80°E) from 2019 to 2020. The PM2.5 measured by the in situ instrument and the PM2.5 simulated by the conversion formula showed a good correlation. The correlation coefficients R were 0.93 (Dalian), 0.90 (Qingdao), and 0.88 (Shanghai). A regular seasonality of the three trace gases is found, but not for aerosols. Considerable amplitudes in the weekly cycles were determined for NO2 and aerosols, but not for SO2 and HCHO. The aerosol profiles were nearly Gaussian, and the shapes of the trace gas profiles were nearly exponential, except for SO2 in Shanghai and HCHO in Qingdao. PM2.5 presented the largest transport flux, followed by NO2 and SO2. The main transport flux was the output flux from inland to sea in spring and winter. The MAX-DOAS and the Copernicus Atmosphere Monitoring Service (CAMS) models’ results were compared. The overestimation of NO2 and SO2 by CAMS is due to its overestimation of near-surface gas volume mixing ratios.

show abstract

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

Cited by 7 publications

References 61 publications

Spatial distribution of aerosol microphysical and optical properties and direct radiative effect from the China Aerosol Remote Sensing Network

Spatial distribution of aerosol microphysical and optical properties and direct radiative effect from the China Aerosol Remote Sensing Network

Multiyear Ground‐Based Measurements of Aerosol Optical Properties and Direct Radiative Effect Over Different Surface Types in Northeastern China

Variation Characteristics and Transportation of Aerosol, NO2, SO2, and HCHO in Coastal Cities of Eastern China: Dalian, Qingdao, and Shanghai

Contact Info

Product

Resources

About