Abstract. From 2006 to 2007, the daily concentrations of major inorganic water-soluble constituents, mineral aerosol, organic carbon (OC) and elemental (EC) in ambient PM10 samples were investigated from 16 urban, rural remote sites various regions China, compared with global aerosol measurements. A large difference between urban chemical species was found, normally 1.5 2.5 factors higher than sites. Optically-scattering aerosols, such as sulfate (~16%), OC (~15%), nitrate (~7%), ammonium...

Abstract. Concentrations of PM10, PM2.5 and PM1 were monitored at 24 CAWNET (China Atmosphere Watch Network) stations from 2006 to 2014. The highest particulate matter (PM) concentrations observed the Xian, Zhengzhou Gucheng, on Guanzhong Plain Huabei (HBP). second PM in northeast China, followed by southern China. According latest air quality standards 14 reached PM10 standard, only 7 stations, mainly rural remote standard. ratios showed a clear increasing trend northern because substantial...

The elemental (EC) and organic carbon (OC) fractions of ambient aerosols were determined by thermo‐chemical analysis 24‐h samples collected during 2006 at 18 stations in China located various rural, urban remote locations. annual mean concentration levels are found to be 0.35 ± 0.01 μ g EC m −3 3.0 0.21 OC for the background sites; 3.6 0.93 16.1 5.2 regional 11.2 2.0 33.1 9.6 sites, respectively. At rural sites representing regionally dispersed aerosols, comparable other locations Asia. all...

Abstract. Since there have been individual reports of persistent haze–fog events in January 2013 central-eastern China, questions on factors causing the drastic differences changes from adjacent years raised. Changes major chemical components aerosol particles over also remain unclear. The extent meteorological contributing to such is yet be determined. study intends present daily based water-soluble constituents, carbonaceous species, and mineral PM10 at 13 stations within different haze...

Abstract. The spatial distribution of the aerosols over 86 Chinese cities was reconstructed from air pollution index (API) records for summer 2000 to winter 2006. PM10 (particulate matter ≤10 μm) mass concentrations were calculated days when principal pollutant, these accounted 91.6% total 150 428 recorded days. 83 in mid-eastern China (100° E 130° E) separated into three latitudinal zones using natural landscape features as boundaries. Areas with high level northern (127 192 μg m−3)...

Abstract. The spatial-temporal distributions and sources of sand dust storm (SDS) in East Asia from 2001 to 2006 were investigated on the basis visibility PM10 data routine SDS weather monitoring networks run by CMA (China Meteorological Administration). A power functional relationships between was found among various regions generally with a good correlation (r2=0.90), especially Asian source regions. In addition, three occurrence centers, i.e. western China, Mongolia northern identified...

MeteoInfo Java software tools were developed for multi-dimensional meteorological data analysis and visualisation by integrating a Geographic Information System (GIS) Scientific Computation Environment (SCE). Included are class library developing, GIS desktop application spatial operation interactive geoscientific exploration, scientific computation environment with Jython scripting. The popular geoscience formats, such as NetCDF, HDF GRIB, supported based on Unidata NetCDF library; also,...

Abstract. This paper introduces a definition of sand/dust storm process as new standard and idea (SDS) groups number SDS-events in Northeast Asia. Based on the meteorological data from WMO/GOS network, 2456 Chinese surface stations NCEP-NCAR reanalysis, processes Asia spring 2000–2006 are investigated. And evolutions anomalies general circulation troposphere analyzed by comparing having most least occurrences SDS year 2006 2003. Associated with noticeably increased occurrence 2006, 3-D...

To better understand anthropogenic pollution originating in Asia and its transport into the global atmosphere, black carbon (BC) emissions were measured continuously from June 2004 to May 2005 at Hok Tsui (22.13°N, 114.15°E). is a continental outflow, downwind monitoring site, located coastal area near Hong Kong. Using an Aethalometer, hourly BC concentrations ranged 63.0 ng/m 3 17.3 μg/m , showing clear seasonal pattern with high winter, spring, fall low values summer. During occurred...

Abstract. Size-resolved aerosol chemical compositions were measured continuously for 1.5 years from June 2010 to January 2012 with an mass spectrometer (AMS) characterize the and size distributions (MSDs) of major components in submicron particles (approximately PM1) at Mountain Tai (Mt. Tai), elevated site central east China. The annual mean concentrations organic, sulfate, nitrate, ammonium, chloride 11.2, 9.2, 7.2, 5.8, 0.95 μg m−3, respectively, which are much higher than those most...

Abstract To better understand the cloud condensation nuclei (CCN) activation capacity of aerosol particles in different pollution conditions, a long-term field experiment was carried out at regional GAW (Global Atmosphere Watch) station Yangtze River Delta area China. The homogeneity highest clean weather, with active fraction all weather types. For same visibility, residual higher relative humidity conditions were more externally mixed and heterogeneous, lower hygroscopic capacity. ( κ )...

Abstract. Using surface meteorological observation and high-resolution emission data, this paper discusses the application of PLAM/h index (Parameter Linking Air-quality to Meteorological conditions/haze) in prediction large-scale low visibility fog-haze events. Based on two-dimensional probability density function diagnosis model for emissions, study extends pollution PLAM regional intensity. The results show that combining influence regular conditions factors together parameterization...

Abstract. CUACE/Dust, an operational mesoscale sand and dust storm (SDS) forecasting system for East Asia, has been developed by online coupling a aerosol emission scheme microphysics onto regional meteorological model with improved advection diffusion schemes detailed Northeast Asia soil erosion database. With initial conditions through 3-DVar data assimilation system, CUACE/Dust successfully forecasted most of the 31 SDS processes in Asia. A comparison predictions 8–12 March process...

A parameterized method is developed to diagnose the air quality in Beijing and other cities with an index termed (parameters linking air-quality meteorological elements PLAM) derived from a correlation between PM 10 relevant weather based on data 2000 2007. Key factors for diagnosing pollution intensity are identified included PLAM that include atmospheric condensation of water vapour, wet potential equivalent temperature, wind velocity. It found poor days elevated usually associated higher...

Abstract. Emissions inventories of black carbon (BC), which are traditionally constructed using a bottom-up approach based on activity data and emissions factors, considered to contain large level uncertainty. In this paper, an ensemble optimal interpolation (EnOI) assimilation technique is used investigate the possibility optimally recovering spatially resolved bias BC. An inverse modeling system for established atmospheric chemistry aerosol model two key problems related in top-down...

Abstract Atmospheric aerosol particles acting as cloud condensation nuclei (CCN) are key elements in the hydrological cycle and climate. To improve our understanding of activation characteristics CCN to obtain accurate predictions their concentrations, a long-term field campaign was carried out Yangtze River Delta, China. The results indicated that were easier activate this relatively polluted rural station than clean (e.g., Amazon region) or dusty Kanpur-spring) locations, but harder more...

This paper reports on the analysis of 24-h aerosol data measured during 2006, at 14 monitoring sites in China. Measurements included seven-wavelength Aethalometers, thermal/optical reflectance analyses filter samples and determination dust aerosols. Black (elemental) carbon (BC, EC) is found to be principal light-absorbing over many parts China; however, fraction apparent light absorption attributed varied from 14% winter, 11% spring, 5% summer 9% autumn. Aerosol urban areas was larger than...

Concentrations of 12‐hour averaged organic carbon (OC), elemental (EC), and other trace elements were determined from bulk aerosol samples at a coastal city Lian Yun Gang (LYG) in east China June to December 2003 sandy land site Tong Liao northeast August 2003. Regional transports four main source areas accounted for ∼35–49% the Asian dust 16–18% carbonaceous particles both sites. The regional mean concentrations various species, especially EC, comparable or lower than those urban inland...

The composition of marine aerosol is quite complex, and its sources are diverse. Across the East China Sea (ECS) Yellow (YS), multi-dimensional analysis aerosols was conducted. characteristics carbonaceous gaseous pollutants were explored through in situ ship-based observation, MERRA-2 reanalysis datasets TROPOMI data from Sentinel-5P satellite. Black carbon (BC)’s average concentration 1.35 ± 0.78 μg/m3, with high-value BC observed during cruise. Through HYSPLIT trajectory analysis,...

Abstract. Soil moisture content is one of the most important parameters as input conditions in forecasting model systems dust storm, but it can not be directly obtained from daily routine weather report. In this paper, a scheme developed to calculate surface soil China by using both precipitation and evaporation. Precipitation report, while evaporation indirectly calculated meteorological elements which are also According formula Penman, considered linear composition dynamic thermodynamic...

Abstract. The spatial distribution of the aerosols over 86 major Chinese cities was constructed from 137 845 daily averaged PM10 (particles with diameter ≤10 μm) concentrations calculated air pollution index (API) records spanning summer 2000 to winter 2006. This dataset based on days when categorized as principal pollutant, accounting for 91.6% total recorded days. 83 in mid-eastern China (longitude 100° E 130° E) were separated into three latitudinal zones Qinlin Mountain – Huaihe River...