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Ye G.,Fuzhou Meteorological Bureau | Feng H.,Fujian Institute of Meteorological Science | Chen Q.,Fujian Meteorological Observatory | Yu C.,Fuzhou Meteorological Bureau
Applied Mechanics and Materials | Year: 2011

Based on the theory of "food capture", adopted BL-1 rainfall rocket with various resources, choose three typical cases to estimate catalyst dosage. Describe the practical bomb number might much more than theory. Different scale and development means different lunched bomb. At the same time, save bomb cost under the circumstance of hail suppression. © (2011) Trans Tech Publications. Source

Jiang Y.-C.,Nanjing University of Information Science and Technology | Zhao T.-L.,Nanjing University of Information Science and Technology | Wang H.,Fujian Institute of Meteorological Science | Wang Q.,Fujian Meteorological Information Center | And 2 more authors.
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2015

In this study focusing on the air quality changes in January 2013, Fuzhou, the capital city of Fujian Province, we investigated the impacts of changes in atmospheric boundary layer and regional air pollutant transport on the atmospheric particulate matter PM2.5 in Fuzhou. By using the ground and radiosonde data operationally observed in Fuzhou and NCEP FNL analysis data of January 2013, the atmospheric boundary variations were characterized by the correlation analysis between atmospheric boundary layer elements and PM2.5 concentrations. By employing the HYSPLIT backward trajectory model and the correlation vector analysis, the regional pollutant transport to Fuzhou in January 2013 was explored. The results indicated that surface air temperature were positively correlated with the PM2.5 concentrations, while near-surface wind speeds were negatively correlated with PM2.5 concentrations, reflecting that favorable boundary layer conditions are conducive to the local formation and accumulation of haze pollutants. However, none of temperature inversion structures existed in the boundary layer during the high PM2.5 pollution in Fuzhou, differently from the typical temperature inversion layer for haze occurrences over the pollutant source regions in Eastern China. The non-inversion in vertical temperature structures in Fuzhou implied that Fuzhou haze events with the vertical mixing of air pollutants from upper layer to surface layer could be greatly contributed from the regional air pollutant transport, and Fuzhou was regarded as a receptor region of PM2.5 pollutants imported from its surrounding source regions. The HYSPLIT modeling and the correlation vector analysis confirmed that the clean days with low PM2.5 in January 2013 were accompanied with southeast winds from ocean to land; the PM2.5 levels for the haze pollution were enhanced by the transport in the northerly winds from the pollutant source region over the Yangtze River Delta region, northern Jiangsu and Anhui, Henan area. The regional transport pathways and source regions of PM2.5 for Fuzhou in January 2013 were identified. ©, 2015, Chinese Society for Environmental Sciences. All right reserved. Source

Zheng Q.,Fujian Institute of Meteorological Science | Wang H.,Fujian Institute of Meteorological Science | Lin C.,Fujian Institute of Meteorological Science | Chen X.,Fujian Environmental Monitoring Central Station | Liu H.,Nanjing University
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2013

The coastal cities in the western region of Taiwan Strait were divided into northern, middle and southern groups. The daily mean mass concentrations of SO2, NO2, and PM10 in constituted cities of the three groups were analyzed from January 2006 to December 2010. The results showed that the overall pollution level of the southern group is the highest. SO2 and PM10 concentrations in the southern group were the highest, while NO2 concentration was slightly lower than the middle group. The analysis indicated that PM10 was the dominant pollutant in all three regions. The annual and monthly variation characteristics of SO2, NO2, and PM10 were similar, and there were no significant weekend effect in all three groups. The influence of different synoptic situations on pollutant concentrations were also analyzed, which showed that the pollutant concentrations were higher during the transformed surface cold high pressure, upper trough, and warm zone convergence, while lower during the low vortex shear, subtropical high, typhoon (intertropical convergence zone), outskirt of typhoon (intertropical convergence zone) and cold high ridge. Source

Lin W.,Fujian Institute of Meteorological Science | Chen B.,Fujian Institute of Meteorological Science | Lin C.,Fujian Institute of Meteorological Science
2010 International Conference on MultiMedia and Information Technology, MMIT 2010 | Year: 2010

The temporal and spatial distribution characteristics of PM10, SO2 and NO2 and the influence of meteorological conditions were analyzed based on the hourly observation data of air quality and concurrent meteorological data of 4 typhoon processes in 2005 and 2006 in Fuzhou. The results indicated that the air quality in Fuzhou during typhoon processes was better than sunny days. The concentration of PM10 cut down when there was heavy rain and gale. The elimination of SO2 was mainly affected by precipitation. The concentration of NO2 increased abruptly due to the reversion of wind direction and the reduction of wind speed, higher than the concentration in sunny days of the same time. In the center of typhoon, the concentration of PM10 and NO2 increased for downdraft making against the diffusion of pollutants, while the concentration of SO2 took little change for the existence of precipitation. © 2010 IEEE. Source

Cai Y.Y.,Fujian Institute of Meteorological Science | Lin C.C.,Fujian Institute of Meteorological Science | Liu J.X.,Fujian Specialized Weather Observatory | Wu D.H.,Fujian Bureau of Meteorology | And 2 more authors.
Bulletin of Environmental Contamination and Toxicology | Year: 2010

Based on the acid rain and concurrent meteorological observational data during the past 10 years in Fujian Province, China, the dependence of distribution characteristics of acid rain on season, rain rate, weather pattern and dominant airflow in four regions of Fujian Province is analyzed. On the annual average, the acid rain frequency is the highest (above 40%) in the southern and mid-eastern regions, and the lowest (16.2%) in the western region. The acid rain occurs most frequently in spring and winter, and least frequent in summer. The acid rain frequency in general increases with the increase of precipitation. It also depend on the direction of dominant airflows at 850 hPa. In the mid-eastern region, more than 40% acid rains appear when the dominant wind directions are NW, W, SW, S and SE. In the southern region, high acid rain occurrence happens when the dominant wind directions are NW, W, SW and S. In the northern region, 41.8% acid rains occur when the southwesterly is pronounced. In the western region, the southwesterly is associated with a 17% acid rain rate. The examination of meteorological sounding conditions over Fuzhou, Xiamen and Shaowu cities shows that the acid rain frequency increases with increased inversion thickness. Based on the results above, a meteorological potential forecast model for acid rain is established and tested in 2007. The result is encouraging. The model provides an objective basis for the development of acid rain forecasting operation in the province. © Springer Science+Business Media, LLC 2010. Source

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