1. Главная
  2. Ресурсы
  3. Библиотечный поиск
Column aerosoloptical propertiesand aerosol radiativeforcing during aserious haze-fogmonth over NorthChina Plain in 2013based onground-based… Huizheng CheXiangao XiaJun Zhu2014 год

Column aerosol optical properties and aerosol radiative forcing during a serious haze-fog month over North China Plain in 2013 based on ground-based sunphotometer measurements
статья из журнала

Полный текстСтраница публикацииПубликация в OpenAlex
Аннотация: Abstract. In January 2013, North China Plain experienced several serious haze events. Cimel sunphotometer measurements at seven sites over rural, suburban and urban regions of North China Plain from 1 to 30 January 2013 were used to further our understanding of spatial-temporal variation of aerosol optical parameters and aerosol radiative forcing (ARF). It was found that Aerosol Optical Depth at 500 nm (AOD500 nm) during non-pollution periods at all stations was lower than 0.30 and increased significantly to greater than 1.00 as pollution events developed. The Angstrom exponent (Alpha) was larger than 0.80 for all stations most of the time. AOD500 nm averages increased from north to south during both polluted and non-polluted periods on the three urban sites in Beijing. The fine mode AOD during pollution periods is about a factor of 2.5 times larger than that during the non-pollution period at urban sites but a factor of 5.0 at suburban and rural sites. The fine mode fraction of AOD675 nm was higher than 80% for all sites during January 2013. The absorption AOD675 nm at rural sites was only about 0.01 during pollution periods, while ~0.03–0.07 and 0.01–0.03 during pollution and non-pollution periods at other sites, respectively. Single scattering albedo varied between 0.87 and 0.95 during January 2013 over North China Plain. The size distribution showed an obvious tri-peak pattern during the most serious period. The fine mode effective radius in the pollution period was about 0.01–0.08 μm larger than during non-pollution periods, while the coarse mode radius in pollution periods was about 0.06–0.38 μm less than that during non-pollution periods. The total, fine and coarse mode particle volumes varied by about 0.06–0.34 μm3, 0.03–0.23 μm3, and 0.03–0.10 μm3, respectively, throughout January 2013. During the most intense period (1–16 January), ARF at the surface exceeded −50 W m−2, −180 W m−2, and −200 W m−2 at rural, suburban, and urban sites, respectively. The ARF readings at the top of the atmosphere were approximately −30 W m−2 in rural and −40–60 W m−2 in urban areas. Positive ARF at the top of the atmosphere at the Huimin suburban site was found to be different from others as a result of the high surface albedo due to snow cover.
Год издания: 2014
Авторы: Huizheng Che, Xiangao Xia, Jun Zhu, Zhengqiang Li, Оleg Dubovik, B. N. Holben, Philippe Goloub, H. Chen, Víctor Estellés, Emilio Cuevas, Luc Blarel, Hong Wang, Hujia Zhao, X. Zhang, Yang Wang, Junying Sun, Ran Tao, X. Zhang, Guangyu Shi
Издательство: Copernicus Publications
Источник: Atmospheric chemistry and physics
Ключевые слова: Atmospheric aerosols and clouds, Atmospheric chemistry and aerosols, Atmospheric Ozone and Climate
Другие ссылки: Atmospheric chemistry and physics (PDF)
Atmospheric chemistry and physics (HTML)
DOAJ (DOAJ: Directory of Open Access Journals) (HTML)
Arcimis (State Meteorological Agency) (PDF)
Arcimis (State Meteorological Agency) (HTML)
Arcimis (State Meteorological Agency) (PDF)
Arcimis (State Meteorological Agency) (HTML)
NASA STI Repository (National Aeronautics and Space Administration) (PDF)
NASA STI Repository (National Aeronautics and Space Administration) (HTML)