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611.
Summer time haze characteristics of the urban atmosphere of Gwangju and the rural atmosphere of Anmyon, Korea 总被引:4,自引:0,他引:4
An extensive visibility monitoring was carried out simultaneously in the urban area of Gwangju and the rural area of Anmyon,
Korea. This study examines patterns of visibility impairment and haze-forming pollutant concentrations on both sites resulting
from natural and anthropogenic sources of gases and particles. Optical visibility measurements by a transmissometer, a nephelometer
and an aethalometer provide aerosol light extinction, scattering, and absorption coefficients for both sites. In order to
investigate the physico-chemical characteristics of atmospheric aerosols, aerosol samples were collected by various aerosol
samplers at GJVMS (Gwangju Visibility Monitoring Station) and at KGAWO (Korea Global Atmosphere Watch Observatory), respectively.
In addition, haze characteristics causing visibility impairment at those two sites were analyzed to obtain source contributions
by regionally transported aerosols using grid analysis and display system (GrADS) from NECP reanalysis data. During the intensive
monitoring period, ammonium sulfate was dominantly responsible for the fine particle mass loading at GJVMS, whereas organic
carbon was the largest contributor at KGAWO. Light scattering by particles accounted for 52.8 to 81.3% of the range at the
urban site, GJVMS and for 72.1 to 94.2% of the range at the rural site, KGAWO. Light absorption by the EC and NO2 was between 14.5 and 34.8% at GJVMS, which was higher than the observed 1.1 ∼ 6.8% at KGAWO, respectively. Light scattering
by aerosol was higher in the rural area than in the urban area. And organic carbon concentration was observed to be significantly
higher than the concentration of elemental carbon at KGAWO. These haze-forming carbonaceous particles originate from anthropogenic
pollutants at the urban atmosphere but they can be produced by natural environments such as marine and forest at the rural
atmosphere. 相似文献
612.
Lee Young Su Kim Young Kwon Choi Eunhwa Jo Hyeri Hyun Hyeseung Yi Seung-Muk Kim Jae Young 《Environmental science and pollution research international》2022,29(44):66591-66604
Environmental Science and Pollution Research - The emission sources and their health risks of fine particulate matter (PM2.5) in Siheung, Republic of Korea, were investigated as a middle-sized... 相似文献
613.
Hong Myung Hwan Joo So Young Kim Dong Wook Yoon Jin-Ho 《Journal of Material Cycles and Waste Management》2022,24(1):63-72
Journal of Material Cycles and Waste Management - Owing to the increasing ACW generation, asbestos detoxification and recycling technologies are required for environmental and economic reasons.... 相似文献