Atmospheric Chemistry and Physics www.atmos-chem-phys.net 1680-7316 1680-7324 8 12 2008 10.5194/acp-8-3199-2008 http://www.atmos-chem-phys.net/8/3199/2008/ http://www.atmos-chem-phys.net/8/3199/2008/acp-8-3199-2008.html http://www.atmos-chem-phys.net/8/3199/2008/acp-8-3199-2008.pdf 3199 3214 2008-06-25 Intercomparison between aerosol optical properties by a PREDE skyradiometer and CIMEL sunphotometer over Beijing, China H. Che G. Shi shigy@mail.iap.ac.cn A. Uchiyama A. Yamazaki H. Chen P. Goloub X. Zhang Key Laboratory of Atmospheric Chemistry (LAC), Centre for Atmosphere Watch and Services (CAWAS), Chinese Academy of Meteorological Sciences (CAMS), CMA, Beijing, 100081, China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China Japan Meteorological Agency, Meteorological Research Institute, 1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan Laboratory for Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China Laboratoire d'Optique Amosphérique, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq, France This study compares the aerosol optical and physical properties simultaneously measured by a SKYNET PREDE skyradiometer and AERONET/PHOTONS CIMEL sunphotometer at a location in Beijing, China. Aerosol optical properties (AOP) including the Aerosol Optical Depth (AOD), Angstrom exponent (<i>α</i>), volume size distribution, single scattering albedo (<i>ω</i>) and the complex refractive index were compared. The difference between the two types of instruments was less than 1.3% for the AOD and less than 4% for the single scattering albedo below the wavelength of 670 nm. There is a difference between the volume size distribution patterns derived from two instruments, which is probably due to difference of measurement protocols and inversion algorithms for the respective instruments. <br></br> AOP under three distinct weather conditions (background, haze, and dust days) over Beijing were compared by using the retrieved skyradiometer and sunphotometer data combined with MODIS satellite results, pyranometer measurements, PM₁₀ measurements, and backtrajectory analysis. The results show that the significant difference of AOP under background, haze, and dust days over Beijing is probably due to different aerosol components under distinct weather conditions. Ackerman, P. and Toon, O. B.: Absorption of visible radiation in atmosphere containing mixtures of absorbing and nonabsorbing particles, Appl. Optics, 20, 3661–3668, 1981. Campanelli, M., Gobbi, G., Tomasi, C., and Nakajima, T.: Intercomparison between aerosol characteristics retrieved simultaneously with a Cimel and Prede sun-sky radiometers in Rome, Torvergata Aeronet site, ÓPTICA PURA Y APLICADA, 37, 3, 3159–3164, 2004a. Campanelli, M., Nakajima, T., and Olivieri, B.: Determination of the Solar Calibration Constant for a Sun-Sky Radiometer: Proposal of an In-Situ Procedure, Appl. Optics, 43, 651–659, 2004b. Charlson, R. J, Schwartz, S. E., Hales, J. M., Cess, D., and Coakley, J. A., and Hansen, J. E.: Climate forcing by anthropogenic aerosols, Science, 255, 423–430, 1992. Che, H. Z., Shi, G. Y., Zhang, X. Y., Arimoto, R., Zhao, J. Q., Xu, L., Wang, B., and Chen, Z. H.: Analysis of 40 years of solar radiation data from China, 1961–2000, Geophys. Res. Lett., 32, L06803, doi:10.1029/2004GL022322, 2005. Draxler, R. R. and Rolph, G. D.: HYSPLIT (HYbrid Single-Particle Lagrangian Integrated Trajectory) Model access via NOAA ARL READY Website (http://www.arl.noaa.gov/ready/hysplit4.html), NOAA Air Resources Laboratory, Silver Spring, MD, 2003. Dubovik, O., Smirnov, A., Holben, B. N., King, M. D., Kaufman, Y. J., Eck, T. F., and Slutsker, I.: Accuracy assessments of aerosol optical properties retrieved from AERONET sun and sky radiance measurements, J. Geophys. Res., 105, 9791–9806, 2000a. Dubovik, O. and King, M. D.: A flexible inversion algorithm for the retrieval of aerosol optical properties from Sun and sky radiance measurements, J. Geophys. Res., 105, 20 673–20 696, 2000b. Dubovik, O., Holben, B. N., Eck, T. F., Smirnov, A., Kaufman, Y. J., King, M. D., Tanre, D., and Slutsker, I.: Variability of absorption and optical properties of key aerosol types observed in worldwide locations, J. Atmos. Sci., 59, 590–608, 2002. Dubovik, O., Sinyuk, A., Lapyonok, T., Holben, B. N., Mishchenko, M., Yang, P., Eck, T. F., Volten, H., Muñoz, O., Veihelmann, B., van der Zande, W. J., Leon, J., Sorokin, M., and Slutsker, I.: Application of spheroid models to account for aerosol particle nonsphericity in remote sensing of desert dust, J. Geophys. Res., 111, doi:10.1029/2005JD006619, 2006. Eck, T. F., Holben, B. N., Dubovik, O., Smirnov, A., Goloub, P., Chen, H. B., Chatenet, B., Gomes, L., Zhang, X. Y., Tsay, S. C., Ji, Q., Giles, D., and Slutske, I.: Columnar aerosol optical properties at AERONET sites in central eastern Asia and aerosol transport to the tropical mid-Pacific, J. Geophys. Res., 110, D06202, doi:10.1029/2004JD005274, 2005. Eck, T. F., Holben, B. N., Reid, J. S., Dubovik, O., Smirnov, A., O'Neill, N. T., Slutsker, I., and Kinne, S.: Wavelength dependence of the optical depth of biomass burning, urban, and desert dust aerosols, J. Geophys. Res., 104, 31 333–31 349 , 1999. Hansen, J., Sato, M., and Ruedy, R.: Radiative forcing and climate response, J. Geophys. Res., 102, 6831–6864, 1997. Hansen, J., Sato, M., Ruedy, R., Lacis, A., and Oinas, V.: Global warming in the twenty-first century: An alternative scenario, Proc. Natl. Acad. Sci. U. S. A., 97, 9875–9880, 2000. Holben, B. N., Eck, T. F., Slutsker, I., et al.: AERONET – A federated instrument network and data archive for aerosol characterization, Remote Sens. Environ., 66, 1–16, 1998. Holben, B. N., Tanré, D., Smirnov, A., et al.: An emerging ground-based aerosol climatology: Aerosol optical depth from AERONET, J. Geophys. Res., 106, 12 067–12 097, 2001. Intergovernmental Panel on Climate Change (IPCC): Climate Change 2001: in: The Scientific Basis, edited by: Houghton, J. T., Ding, Y., Griggs, D. I., et al., 896 pp., Cambridge Univ. Press, New York, 2001. Kim, D. H., Sohn, B. J., Nakajima, T., Takamura, T., Choi, B. C., and Yoon, S. C.: Aerosol optical properties over east Asia determined from ground-based sky radiation measurements, J. Geophys. Res., 109, D02209, doi:10.1029/2003JD003387, 2004. Menon, S., Hansen, J. E., Nazarenko, L., and Luo, Y. F.: Climate effects of black carbon aerosols in China and India, Science 297, 2249–2252, 2002. Nakajima, T., Sekiguchi, M., Takemura, T., et al.: Significance of direct and indirect radiative forcings of aerosols in the East China Sea region, J. Geophys. Res., 108(D23), 8658, doi:10.1029/2002JD003261, 2003. Nakajima, T., Tonna, G., Rao, R., and Holben, B. N.: Use of sky brightness measurements from ground for remote sensing of particulate polydispersions, Appl. Optics, 35, 2672–2686, 1996. O'Neill, N. T., Ignatov, A., Holben, B. N., and Eck, T. F.: The lognormal distribution as a reference for reporting aerosol optical depth statistics; Empirical tests using multi-year, multi-site AERONET sunphotometer data, J. Geophys. Lett., 27, 20, 3333–3336, 2000. Ramanathan, V., Crutzen, P. J., Lelieveld, J., et al.: The Indian Ocean Experiment: An integrated analysis of the climate forcing and effects of the great Indo-Asian haze, J. Geophys. Res., 106, 28, 371–398, 2001. Sano, I., Mukai, S., Yamano, M., Takamura, T., Nakajima, T., and Holben, B. N.: Calibration and validation of retrieved aerosol properties based on Aeronet and Skynet, Adv. Space Res., 32, 11, 2159–2164, 2003. Smirnov, A., Holben, B. N., Eck, T. F., Dubovik, O., and Slutsker, I.: Cloud screening and quality control algorithms for the AERONET database, Remote. Sens. Environ., 73, 337–349, 2000. Smirnov, A., Holben, B. N., Eck, T. F., Slutsker, I., Chatenet, B., and Pinker, R. T.: Diurnal variability of aerosol optical depth observed at AERONET (Aerosol Robotic Network) sites, Geophys. Res. Lett., 29, 23, 2115, doi:10.1029/2002GL016305, 2002. Stanhill, G. and Cohen, S.: Global dimming: a review of the evidence for a widespread and significant reduction in global radiation with discussion of its probable causes and possible agricultural consequences, Agr. Forest Meteorol., 107, 255–278, 2001. Takemura, T., Nakajima, T., Dubovik, O., Holben, B. N., and Kinne, S.: Single scattering albedo and radiative forcing of various aerosol species with a global three-dimensional model, J. Climate, 15, 333–352, 2002. Uchiyama, A., Yamazaki, A., Togawa, H., and Asano, J.: Characteristics of Aeolian dust observed by sky-radiometer in the Intensive Observation Period 1 (IOP1), J. Meteor. Soc. Japan, 83A, 291305, 2005. Xia, X. A., Chen, H. B., Wang, P. C., Zong, X. M., Qiu, J. H., and Goloub, P.: Aerosol properties and their spatial and temporal variations over north China in spring 2001, Tellus, 57B, 28–39, 2005.