科研进展
科研进展
您的当前位置:首页 > 科研成果 > 科研进展

Comparison of Column-Integrated Aerosol Optical and Physical Properties in an Urban and Suburban Site on the North China Plain

发布人:szl  |  来自:本站  |  发布时间:2015-07-06 02:18:00  |  点击次数:1155
全文下载链接: http://lageo.iap.ac.cn/uploads/150706011800wdz9zm7erpw1.pdf
 
Comparison of Column-Integrated Aerosol Optical and Physical Properties in an Urban and Suburban Site on the North China Plain
FAN Xuehua*,1, XIA Xiang'ao1, 2, CHEN Hongbin1, 2
1.Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics,Chinese Academy of Sciences, Beijing 100029;
2.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science & Technology, Nanjing 210044
 
Abstract  
The column-integrated optical properties of aerosol in Beijing and Xianghe, two AErosol RObotic NETwork (AERONET) sites situated on the North China Plain (NCP), are investigated based on Cimel sunphotometer measurements from October 2004 to June 2012. The outstanding feature found is that the seasonal medians of aerosol optical depth (AOD) at the two stations are in good agreement. The correlation coefficients and the absolute differences between AOD at the two stations are larger than 0.84 and less than 0.05, respectively. Good agreement in AOD at these two sites (one urban and the other suburban; 70 km apart) indicates that aerosol pollution in the Greater Beijing area is regional in nature. However, we find significant differences in the absorption Ångström Exponent (AAE), the real and imaginary part of the refractive index, and thereby the single scattering albedo (SSA), and the difference is seasonally dependent. The feature is found to be more prominent in fall when the fine-mode fraction (FMF) and fine-mode effective radius are significantly different at the two stations, besides the parameters mentioned above. The SSA in Beijing at four wavelengths shows lower values as compared to those in Xianghe, although the difference is not significant in some cases. Significant differences in AAE and fine-mode effective radius indicate that there are differences in aerosol physical and chemical properties in urban and suburban regions on the NCP.


  • 卫星数据中心
  • |
  • 大气物理所
  • |
  • 北京朝阳区华严里40号, 100029 电话:010-82995065,82995091 传真:010-82995073
    版权所有:中国科学院大气物理研究所中层大气和全球环境探测重点实验室
    京ICP备1234556号