Articles | Volume 15, issue 13
Atmos. Chem. Phys., 15, 7619–7652, 2015

Special issue: Haze-fog forecasts and near real time (NRT) data application...

Atmos. Chem. Phys., 15, 7619–7652, 2015

Research article 14 Jul 2015

Research article | 14 Jul 2015

Ground-based aerosol climatology of China: aerosol optical depths from the China Aerosol Remote Sensing Network (CARSNET) 2002–2013

H. Che1,2, X.-Y. Zhang1,2, X. Xia4,3, P. Goloub5, B. Holben6, H. Zhao7, Y. Wang1, X.-C. Zhang8, H. Wang1, L. Blarel5, B. Damiri9, R. Zhang10, X. Deng11, Y. Ma7, T. Wang12, F. Geng13, B. Qi14, J. Zhu3, J. Yu15, Q. Chen15, and G. Shi16 H. Che et al.
  • 1Key Laboratory of Atmospheric Chemistry (LAC), Chinese Academy of Meteorological Sciences (CAMS), CMA, Beijing, 100081, China
  • 2Jiangsu Collaborative Innovation Center of Climate Change, Nanjing, 210093, China
  • 3Laboratory for Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
  • 4Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing, 210044, China
  • 5Laboratoire d'Optique Amosphérique, Université des Sciences et Technologies de Lille, 59655, Villeneuve d'Ascq, France
  • 6Biospheric Sciences Branch, Code 923, NASA/Goddard Space Flight Center, Greenbelt, MD, USA
  • 7Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110016, China
  • 8Meteorological Observation Center, CMA, Beijing, 100081, China
  • 9Cimel Électronique, Paris, 75011, France
  • 10Key Laboratory of Regional Climate-Environment for Temperate East Asia (RCE-TEA), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
  • 11Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, CMA, Guangzhou, 510080, China
  • 12School of Atmospheric Sciences, Nanjing University, Hankou Rd. 22, Nanjing, 210093, China
  • 13Shanghai Urban Environmental Meteorology Center, Pudong New Area Weather Office, SMB, Shanghai, 200135, China
  • 14Hangzhou Meteorological Bureau, Hangzhou, 310051, China
  • 15Plateau Atmospheric and Environment Key Laboratory of Sichuan Province, College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China
  • 16State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China

Abstract. Long-term measurements of aerosol optical depths (AODs) at 440 nm and Ångström exponents (AE) between 440 and 870 nm made for CARSNET were compiled into a climatology of aerosol optical properties for China. Quality-assured monthly mean AODs are presented for 50 sites representing remote, rural, and urban areas. AODs were 0.14, 0.34, 0.42, 0.54, and 0.74 at remote stations, rural/desert regions, the Loess Plateau, central and eastern China, and urban sites, respectively, and the corresponding AE values were 0.97, 0.55, 0.82, 1.19, and 1.05. AODs increased from north to south, with low values (< 0.20) over the Tibetan Plateau and northwestern China and high AODs (> 0.60) in central and eastern China where industrial emissions and anthropogenic activities were likely sources. AODs were 0.20–0.40 in semi-arid and arid regions and some background areas in northern and northeastern China. AEs were > 1.20 over the southern reaches of the Yangtze River and at clean sites in northeastern China. In the northwestern deserts and industrial parts of northeast China, AEs were lower (< 0.80) compared with central and eastern regions. Dust events in spring, hygroscopic particle growth during summer, and biomass burning contribute the high AODs, especially in northern and eastern China. The AODs show decreasing trends from 2006 to 2009 but increased ~ 0.03 per year from 2009 to 2013.

Short summary
This work studied more than 10 years of measurements of aerosol optical depths (AODs) made for 50 sites of CARSNET compiled into a climatology of aerosol optical properties for China. It lets us see a detailed full-scale description of AOD observations over China. The results would benefit us a lot in comprehending the temporal and special distribution aerosol optical property over China. Also the data would be valuable to communities of aerosol satellite retrieval, modelling, etc.
Final-revised paper