Atmospheric Chemistry and Physics www.atmos-chem-phys.net 1680-7316 1680-7324 9 4 2009 10.5194/acp-9-1227-2009 http://www.atmos-chem-phys.net/9/1227/2009/ http://www.atmos-chem-phys.net/9/1227/2009/acp-9-1227-2009.html http://www.atmos-chem-phys.net/9/1227/2009/acp-9-1227-2009.pdf 1227 1239 2009-02-17 Asian dust outflow in the PBL and free atmosphere retrieved by NASA CALIPSO and an assimilated dust transport model Y. Hara hara.yukari@nies.go.jp K. Yumimoto I. Uno A. Shimizu N. Sugimoto Z. Liu D. M. Winker National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan Research Institute for Applied Mechanics, Kyushu University, Fukuoka, Japan National Institute of Aerospace, Hampton, VA 23666, USA NASA Langley Research Center, Hampton, VA 23681, USA Three-dimensional structures of Asian dust transport in the planetary boundary layer (PBL) and free atmosphere occurring successively during the end of May 2007 were clarified using results of space-borne backscatter lidar, Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP), and results obtained using a data-assimilated version of a dust transport model (RC4) based on a ground-based NIES lidar network. The dust layer depths and the vertical and horizontal structure simulated by RC4 agreed with those of CALIOP observations from the dust source region to the far-downstream region. Two important transport mechanisms of Asian dust in the PBL and free atmosphere were clarified: a low-level dust outbreak within the dry slot region of a well-developed low-pressure system, and formation of an elevated dust layer within the warm sector of a low-pressure system. We also represent the aging of pure dust particles using the particle depolarization ratio (PDR) at 532 nm and the color ratio (CR) at 1064 nm and 532 nm. Aerosols with high PDR were observed uniformly over the dust source region. While the dust cloud was transported to the eastern downwind regions, aerosols with low PDR and high CR occur in the layer of less than 1 km height, suggesting a mixing state of spherical aerosols and dust in the surface layer. % vor jede Referenz Byun, D. W. and Ching, J. K. S.: Science algorithms of the EPA Models-3 community multi-scale air quality (CMAQ) modeling system, NERL, Research Triangle Park, NC EPA/ 600/R-99/030, 1999. % vor jede Referenz Fernald, F. G.: Analysis of atmospheric LIDAR observations: Some comments, Appl. Optics, 23, 652–653, 1984. % vor jede Referenz Liu, Z., Sugimoto, N., and Murayama, T.: Extinction-to-backscatter ratio of Asian dust observed with high-spectral-resolution LIDAR and Raman LIDAR, Appl. Optics, 41, 2760–2767, 2002. % vor jede Referenz Liu, Z., Vaughan, M. A., Winker, D. M., Hostetler, C. A., Poole, L. R., Hlavka, D., Hart, W., and McGill, M.: Use of probability distribution functions for discriminating between cloud and aerosol in lidar backscatter data, J. Geophys. Res., 109, D15202, doi:10.1029/2004JD004732, 2004. % vor jede Referenz Liu, Z., Liu, D., Huang, J., Vaughan, M., Uno, I., Sugimoto, N., Kittaka, C., Trepte, C., Wang, Z., Hostetler, C., and Winker, D.: Airborne dust distributions over the Tibetan Plateau and surrounding areas derived from the first year of CALIPSO lidar observations, Atmos. Chem. Phys., 8, 5045–5060, 2008. % vor jede Referenz Shimizu, A., Sugimoto, N., Matsui, I., Arao, K., Uno, I., Murayama, T., Kagawa, N., Aoki, K., Uchiyama, A., and Yamazaki, A.: Continuous observations of Asian dust and other aerosols by polarization lidars in China and Japan during ACE-Asia, J. Geophys. Res., 109, D19S17, doi:10.1029/2002JD003253, 2004. % vor jede Referenz Sugimoto, N., Matsui, I., and Shimizu, A.: Observation of dust and anthropogenic aerosol plumes in the Northwest Pacific with a two-wavelength polarization lidar on board the research vessel \textitMirai, Geophys. Res. Lett., 29(19), 1901, doi:10.1029/2002GL015112, 2002. % vor jede Referenz Sugimoto, N., Shimizu, A., Matsui, I., Dong, X., Zhou, J., Bai, X., Zhou, J., Lee, C.-H., Yoon, S.-C., Okamoto, H., and Uno, I.: Network observations of Asian dust and air pollution aerosols using two-wavelength polarization Lidars, 23rd International Laser Radar Conference, July 2006 Nara, Japan, 23ILRC, ISBN 4-9902916-0-3, 851–854, 2006. % vor jede Referenz Takemura, T. and Uno, I.: Modeling study of long-range transport of Asian dust and anthropogenic aerosols from East Asia, Geophys. Res. Lett., 29(24), 2158, doi:10.1029/2002GL016251, 2002. % vor jede Referenz Uno, I., Amano, H., Emori, S., Kinoshita, K., Matsui, I., and Sugimoto, N.: Trans-Pacific yellow sand transport observed in April 1998: A numerical simulation, J. Geophys. Res., 106(D16), 18331–18344, 2001. % vor jede Referenz Uno, I., Satake, S., Carmichael, G. R., Tang, Y., Wang, Z., Takemura, T., Sugimoto, N., Shimizu, A., Murayama, T., Cahill, T. A., Cliff, S., Uematsu, M., Ohta, S., Quinn, P. K., and Bates, T. S.: Numerical study of Asian dust transport during the springtime of 2001 simulated with the Chemical Weather Forecasting System (CFORS) model, J. Geophys. Res., 109, D19S24, doi:10.1029/2003JD004222, 2004. % vor jede Referenz Uno, I., Wang, Z., Chiba, M., Chun, Y.-S., Gong, S., Hara, Y., Jung, E., Lee, S.-S., Liu, M., Mikami, M., Music, S., Nickovic, S., Satake, S., Shao, Y., Song, Z., Sugimoto, N., Tanaka, T., and Westphal, D.: Dust model intercomparison (DMIP) study over Asia – Overview, J. Geophys. Res., 111, D12213, doi:10.1029/2005JD006575, 2006. % vor jede Referenz Uno, I., He, Y., Ohara, T., Yamaji, K., Kurokawa, J.-I., Katayama, M., Wang, Z., Noguchi, K., Hayashida, S., Richter, A., and Burrows, J. P.: Systematic analysis of interannual and seasonal variations of model-simulated tropospheric NO₂ in Asia and comparison with GOME-satellite data, Atmos. Chem. Phys., 7, 1671–1681, 2007. % vor jede Referenz Uno, I., Yumimoto, K., Shimizu, A., Hara, Y., Sugimoto, N., Wang, Z., Liu, Z., and Winker, D. M.: 3D Structure of Asian Dust Transport revealed by CALIPSO Lidar and a 4DVAR Dust Model, Geophys. Res. Lett., 35, L06803, doi:10.1029/2007GL032329, 2008. % vor jede Referenz Yumimoto, K., Uno, I., Sugimoto, N., Shimizu, A., and Satake, S.: Adjoint inversion modelling of dust emission and transport over East Asia, Geophys. Res. Lett., 34, L08806, doi:10.1029/2006GL028551, 2007. % vor jede Referenz Yumimoto, K., Uno, I., Sugimoto, N., Shimizu, A., Liu, Z., and Winker, D. M.: Adjoint inversion modeling of Asian dust emission using lidar observations, Atmos. Chem. Phys., 8, 2869–2884, 2008. % vor jede Referenz Walko, R. L., Tremback, C. J., and Bell, M. J.: HYPACT: Hybrid Particle And Concentration Transport Model User's Guide, ASTER Division, Mission Research Corp., 2001. % vor jede Referenz Winker, D. M., Hunt, W. H., and McGill, M. J.: Initial performance assessment of CALIOP, Geophys. Res. Lett., 34, L19803, doi:10.1029/2007GL030135, 2007.