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List of Abstracts 183P-Observations 2.36 ID:4310 10:30MAX-DOAS Monitoring Network Observations of NO2 and Aerosols over Japan, China, Korea, andRussiaYugo Kanaya 1 , Hitoshi Irie 1 , Hisahiro Takashima 1 , Hironobu Iwabuchi 1 , Hajime Akimoto 2 , KengoSudo 3 , Young-Joon Kim 4 , Pinhua Xie 5 , Evgeny Grechko 6 , Mikhail Panchenko 7 , Myojeong Gu 4 , JihyoChong 4 , Hanlim Lee 4 , Ang Li 5 , Fuqi Si 5 , Jin Xu 5 , Wenqing Liu 5 , Anatly Dzhola 6 , Mikhail Sviridenkov 6 ,Svetlana Terpugpva 71 Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan2 Acid Deposition and Oxidant Research Center, Niigata, Japan3 Nagoya University, Nagoya, Japan4 Gwangju Institute of Science and Technology (GIST), Gwangju, Korea5 Anhui Institute of Optics and Fine Mechanics (AIOFM), CAS, Hefei, China6 A.M. Obukhov Institute of Atmospheric Physics (IAP), RAS, Moscow, Russia7 V.E. Zuev Institute of Atmospheric Optics (IAO), RAS-SB, Tomsk, RussiaContact: yugo@jamstec.go.jpAir quality change in Asia and surrounding regions is paid attention because of the rapid and substantialincrease in the human activity in this region. We have established a long-term MAX-DOAS (Multi-AxisDifferential Optical Absorption Spectroscopy) monitoring network over the region to provide verticallyresolved(or integrated) NO2 densities suitable for the validation of satellite data and chemical transportmodels. Standardized instruments were deployed at 6 stations: Cape Hedo (26.87N, 128.25E, starting inMarch 2007), Yokosuka, Japan (35.32N, 139.65E, April 2007), Gwangju, Korea (35.23N, 126.84E,February 2008), Hefei, China (31.91N, 117.16E, March 2008), Zvenigorod (55.70N, 36.78E, October 2008),and Tomsk, Russia (56.48N, 85.05E, January 2009). Scattered sunlight at 6 elevation angles (3, 5, 10, 20, 30,and 90 (sometimes 70) degrees) is received sequentially by a rotating mirror and then delivered to atemperature-regulated spectrometer by a bundle of optical fibers. A set of measurements at the 6 angles took30 minutes. A single algorithm comprising of DOAS spectral fitting and inversion to yield vertical columndensities (VCD) from slant columns was applied for all of the spectra and thus provided a systematic dataset. Observations of an O4 band at 476 nm provided optical path information (and thus aerosol extinction)together with NO2 (460-490nm). A wide range of the observed tropospheric NO2 VCD ((0.5-60)x10**15molecules cm-2) benefited the satellite data validation. Clear summertime minimum was found for the 3-year observations at Cape Hedo and Yokosuka. Generally-found daytime decreases were attributable to thephotolysis, oxidation by OH, and strong emissions in the morning. However, daytime increases were foundin winter in Yokosuka, suggesting transport from other polluted regions. The levels on Sundays werelowered for Yokosuka and Gwangju where transportation sector emission is dominant, while they were notfor Hefei, suggesting that dominant sources and/or weekly emission patterns are different.P-Observations 2.37 ID:4156 10:30Optical properties of aerosols during dry and wet season over AmazoniaKenia T. Wiedemann 1 , Paulo Artaxo 1 , Steven C. Wofsy 2 , Meinrat O. Andreae 3 , Christoph Gerbig 41 University of Sao Paulo, Sao Paulo, Brazil2 Harvard University, Cambridge, USA3 Max-Planck-Institute for Chemistry, Mainz, Germany4 Max-Planck-Institute for Biogeochemistry, Jena, GermanyContact: kenia@if.usp.brThe biogeochemical cycles, among many critical processes in land-atmosphere interactions, are offundamental importance in the global radiative balance. In particular, aerosol particles change the solarradiation balance and atmospheric temperature profile, affects cloud microphysics, and has other importantiCACGP-IGAC 2010 14 July, 2010