Air pollution meteorology

Xem 1-13 trên 13 kết quả Air pollution meteorology
  • Cyclones are a key element of the atmospheric circulation in the midlatitudes (Carlson, 1998). Cyclogenesis, for which a first conceptual model was presented by the Bergen school (Bjerknes, 1910), occurs most frequently at the polar front. The various ascending and descending airstreams typically associated with these cyclones carry a range of different chemical signatures (Cooper et al., 2002). The so-called warm conveyor belt (WCB) – a strongly ascending airstream ahead of a cyclone’s cold front (Browning et al.

    pdf17p doipassword 01-02-2013 17 4   Download

  • Air pollution in general, especially air pollution from road traffic in particular in Hochiminh City (HCMC) are at the alarming. Using models to simulate air quality is needed to · manage and predict the air pollution levels. Research results have prepared emission inventory of air pollutants from road traffic, industry and domestic sources in HCMC. Besides, TAPQM and FVM models were used to simulate the meteorological conditions and air quality in HCMC.

    pdf13p dem_thanh 22-12-2012 20 3   Download

  • In order to provide comparable estimates of exposure to outdoor air pollution for all 14 WHO regions, models developed by the World Bank were used to estimate concentrations of inhalable particles (PM10) (Pandey et al., 2004). Specifically, economic, meteorologic, and demographic data and available PM measurements in 304 cities were used to estimate PM10 levels in all 3211 cities worldwide with populations greater than 100,000 and capital cities.

    pdf7p doipassword 01-02-2013 15 3   Download

  • Field data are being integrated into well-developed and tested models to better understand and characterize aerosol pollution in Mexico City. The spatial, temporal, size, and chemical characteristics of specific emissions sources are needed to allow their contributions to PM concentrations to be distinguished from each other and to provide accurate inputs to air quality models.

    pdf19p doipassword 01-02-2013 17 3   Download

  • Polychlorinated biphenyls (PCBs) are a family of chemical compounds which do not exist in nature but which are manmade. Commercial mixtures are clear, pale yellow liquids manufactured by the replacement of hydrogen atoms on the biphenyl molecule by chlorine. The reaction is controlled according to the percentage replacement of hydrogen and results in a product which contain chlorobiphenyls with one or, more usually, several chlorine atoms attached to each molecule.

    pdf111p bengoan258 05-12-2011 44 20   Download

  • The McGraw-Hill Dictionary of Environmental Science provides a compendium of 8,800 terms that are relevant to environmental science and related fields of science and technology. The coverage includes terminology from more than 30 disciplines, including agriculture, botany, chemical engineering, civil engineering, climatology, ecology, forestry, genetics and evolution, geochemistry, geography and mapping, meteorology, microbiology, mycology, oceanography, petroleum and mining engineering, plant pathology, systematics, and zoology....

    pdf510p boy_them_yeu 03-07-2013 58 17   Download

  • In the editors’ preface to the fourth edition it was noted that there was good news and there was bad news. It is the same for this, the fifth edition. One suspects that this will always be the case. The 2004 Nobel Prize for Peace has been awarded to Professor Dr. Wangari Maathai. Dr. Maathai’s award was based on her efforts on behalf of conservation and women’s rights. These efforts were made at great personal risk. In addition, the Kyoto Protocol has been ratified by the requisite number of countries.

    pdf61p bengoan258 05-12-2011 48 8   Download

  • Weather natural hazards, the environment and climate change are of concern to all of us. Especially, it is essential to understand how human activities might impact the nature. Hence, monitoring, research, and forecasting is of the outmost importance. Furthermore, climate change and pollution of the environment do not obey national borders; so, international collaboration on these issues is indeed extremely important.

    pdf0p namde01 11-04-2013 41 8   Download

  • After its emission or secondary formation, the length of time airborne matter will remain suspended in the air will depend upon its density, shape and size and meteorological conditions. Suspended particles are deposited by dry deposition, either by sedimentation and gravitational settling or impaction due to atmospheric turbulence and diffusion. This latter process is characteristic of particles which undergo Brownian movement and sizes below 0.1µm.

    pdf318p saimatkhauroi 01-02-2013 18 4   Download

  • The problems of smog formation are exacerbated by a meteorological phenomenon known as thermal inversion. Under normal atmospheric conditions, warm air in the vicinity of a large city is trapped by an overlayer of cool air. Since warm gases tend to rise, they normally diffuse upward and disperse the smog and other pollutants. A thermal inversion occurs when the upper layer is a layer of warm air, while the polluted air near the ground is relatively cool. In such a situation, the pollutant-laden cool air cannot rise and disperse.

    pdf13p tainhacmienphi 19-02-2013 16 4   Download

  • ẢNH HƯỞNG CỦA THỜI TIẾT về ô nhiễm Giới thiệu Khi dân số thế giới và công nghiệp hóa phát triển, ô nhiễm không khí (hình 1) trở thành một vấn đề dần dần nghiêm trọng hơn. Việc kiểm soát ô nhiễm không khí đòi hỏi sự tham gia của các nhà khoa học từ nhiều ngành: vật lý, hóa học và kỹ thuật cơ khí, khí tượng học, kinh tế, và chính trị. Số lượng kiểm soát cần thiết phụ thuộc vào kết quả của các nghiên cứu y tế và sinh học.

    pdf11p bengoan258 05-12-2011 23 3   Download

  • This book is intended for engineering students who are grounded in basic physics, chemistry, and biology, and who have already been introduced to fluid mechanics. The material presented can readily be covered in a one-semester course.

    pdf510p doremon3244 07-06-2014 28 11   Download

  • Students should check their experiments every day for signs of growth. Care should be employed when examining the sponges under a stereomicroscope since the gemmules may take more than a day to attach firmly to the bottom of the well. Magnification at 30 X or less should be sufficient for the visualization of growth. As the experiments progress, students will be able to detect major growth abnormalities immediately, but should also look for more subtle developmental abnormalities (such as the absence of a well defined water vascular system).

    pdf15p tainhacmienphi 19-02-2013 13 2   Download

Đồng bộ tài khoản