title: [Observation study on aerosol optical properties and radiative forcing using the ground-based and satellite remote sensing at background station during the regional pollution episodes].
abstract: The significant effect of anthropogenic pollutants transportation on the physical and optical properties of regional background atmospheric aerosol was studied by using ground-based and satellite remote sensing data obtained at the atmospheric background station (Shangdianzi, Beijing) of North China during October 1 to 15 in 2011. The aerosol mass concentration and reactive gases concentration increased obviously during periods of October 4-5, October 7-9, and October 11-12. Comparing with the background period of October 1-3, volume concentration increased by a factor of 3-6 for reactive gases such as NO(x), and CO, and a factor of 10-20 for SO2. Mass concentration of PM2.5 was about 200 microg x m(-3) on October 9. During haze period, the AOD at 500 nm varied between 0.60 to 1.00. The single scattering albedo (SSA) was lower than 0.88. And the black carbon concentration increased 4-8 times, which suggested the aerosol absorption was very strong during this pollution episode. The absorption of aerosol particles could cause 100-400 W x m(-2) increase of atmospheric radiation. The surface radiation decreased by about 100-300 W x m(-2) due to the aerosol scattering and absorption. This could cause higher stability of atmosphere, which will significantly affect the cloud and precipitation, and thus the regional weather and climate.
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Zhang
authors.forename: Xiang-Ao
authors.initials: XA
authors.lastname: Xia
authors.forename: Hui-Zheng
authors.initials: HZ
authors.lastname: Che
authors.forename: Jie
authors.initials: J
authors.lastname: Tang
authors.forename: Yi-Xi
authors.initials: YX
authors.lastname: Tang
authors.forename: Wei
authors.initials: W
authors.lastname: Meng
authors.forename: Fan
authors.initials: F
authors.lastname: Dong
mesh_terms: D000336:Aerosols / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere / Q000032:analysis; D002681:China; D002980:Climate; D004784:Environmental Monitoring / Q000379:methods*; D004787:Environmental Pollution / Q000032:analysis*; D055095:Optics and Photonics; D058998:Remote Sensing Technology; D053260:Soot / Q000032:analysis; D014887:Weather
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D053260:Soot