Dissertation > Environmental science, safety science > Environmental pollution and its prevention > Atmospheric pollution and its control > Particulate pollutants

Study on the Deposition Fluxes of Aerosols and Nitrogen over the Yellow Sea

Author ZuoHan
Tutor GaoHuiWang
School Ocean University of China
Course Atmospheric Physics and Atmospheric Environment
Keywords Atmospheric aerosols Nitrogen Deposition flux Size spectra Yellow Sea
CLC X513
Type Master's thesis
Year 2008
Downloads 209
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Atmospheric deposition is an important way to one of a number of substances in the atmosphere into the ocean. In the local waters of the open ocean or some lack of nutritional elements, atmospheric deposition is the main source of the growth of marine organisms nutritional elements required. Load a variety of elements in aerosol particles, nitrogen is an important nutritional element for biological growth, but also to control the key elements of the marine ecosystem structure, function and biological diversity. Atmospheric deposition of many marine and terrestrial ecosystems, one of the main nitrogen source. Therefore, to study the atmospheric aerosol deposition fluxes of nitrogen in the Yellow Sea has important implications for the understanding of the of atmospheric substances on the delivery of the Yellow Sea, the nutrient cycle and atmospheric nutrients impact on marine ecosystems. In this paper, the Sino-Japanese cooperation projects between the two countries - the Aeolian Dust Experiment on Climate Impact (ADEC) observations 2002-2003 and 2005-2006, the Air Pollution Index (Air Pollution Index, API) compares the Yellow Sea atmospheric gas sol deposition fluxes of different estimation methods to estimate a reasonable range of the atmospheric aerosol deposition fluxes of the Yellow Sea, and to explore the impact of dust weather. The study showed that: deposition fluxes of exponential decay on methods and multi-linear interpolation method is closer to the observed data, and the use of single-point observations to directly estimate the the Yellow Sea TSP and atmospheric nitrogen deposition fluxes larger error. The 2002-2003 the Yellow Sea TSP and atmospheric nitrogen dry deposition fluxes were approximately 0.86 ~ 1.50g / (m2 · mon) and 14.0 ~ 27.9 mg / (m2 · mon), 05-06 Yellow Sea TSP and atmosphere dry deposition fluxes of nitrogen were 0.54 ~ 1.19g / (m2 · mon) and 986 ~ 22.2 mg / (m2 · mon). TSP deposition fluxes of seasonal distribution for the spring gt; fall gt; winter gt; the summer seasonal variations of atmospheric nitrogen deposition fluxes compared to Spring gt; summer gt; fall. The dust weather contribution to the Yellow Sea TSP concentration and deposition fluxes performance decreasing from west to east, the aerosol deposition fluxes are mainly concentrated in the larger particle size segment. The dust weather contribution of the Qingdao and Fukuoka nitrogen deposition fluxes were 19.1mgN / (m2 · mon) and 13.0mgN / (m2 · mon). In addition, human activities in the West Bank of the Yellow Sea also the the waters aerosol and atmospheric particulate nitrogen deposition fluxes. The particle size of the aerosol particles determines their lifetime in the atmosphere, physical and chemical properties, and the production and circulation of the atmosphere substances also have some impact. Combined with the characteristics of the weather conditions of atmospheric aerosol particle size spectrum, can better explore the sources of aerosols and their transport pattern. In this paper, the size spectra Qianliyan observational data and the ADEC 02-03 year data analysis of the spectrum and the mass spectrum of the Yellow Sea atmospheric aerosol number concentration. The study shows that the the Yellow Sea aerosol number concentration is lower than in urban areas, but higher than the South China Sea. Diurnal variation of aerosol number concentration Qianliyan by the combined effect of the atmospheric boundary layer stability, secondary aerosol generation and wind direction and other factors. Aerosol particle number concentrations were significantly increased in the fog weather. Yellow Sea in the West Bank, the aerosol mass spectrum has obviously been in the spring dust weather in the winter by heating impact in the West Bank significantly. Aerosol mass spectra in the spring dust weather in the east, is still evident, but winter heating in the West Bank is not large. Dust weather significantly affect the distribution of the atmospheric aerosol mass concentration spectrum of the Yellow Sea, the peak of the coarse particle states significantly increased.

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