Dissertation > Excellent graduate degree dissertation topics show

Numerical Simulation Research on Meteorological Condition of Typical Air Pollution of Urumqi in Winter

Author: ZhangYanYan
Tutor: ZhuBin；MengFan
School: Nanjing University of Information Engineering
Course: Atmospheric Physics and Atmospheric Environment
Keywords: Urumqi Air Pollution Inversion
CLC: X13
Type: Master's thesis
Year: 2011
Downloads: 61
Quote: 0
Read: Download Dissertation

Abstract


Urumqi serious air pollution , and the pollution situation is closely related with the local meteorological conditions and emission source status . Urumqi area with complex terrain , most of the previous studies are based on observations of a finite number of observation stations pollutant concentrations and ground meteorological data , the lack of regional representation , can only cover a limited amount of time and space , it is not comprehensive enough . This paper wRF numerical model and observational data combined to Urumqi typical winter heavy pollution meteorological processes carried out a detailed analysis , the following conclusions : ( 1 ) Urumqi serious air pollution problems and pollution situation and the local weather conditions closely related. The Urumqi region pollutant concentration peak often corresponds to the low wind speed near - surface wind field wind shift . The the Urumqi high concentration of pollution in both daytime and nighttime . During the day and by the elevated source of pollutant concentration to achieve varying degrees of the peak ; night due to the stable stratification to maintain a high level of \Urumqi winter wind was small even static wind is not conducive to the spread of pollutants . ( 2 ) the boundary layer and the upper atmosphere persistence of strong stable stratification is an important factor to affect Urumqi near-surface air pollutant concentration . Which, during the day off to inversion, nocturnal temperature inversion affixed . Intensity of inversion inversion intensity of the peak phase of the pollutant concentration than the concentration of pollutants rise and decline stage . (3) the formation of the Tianshan Mountains , Urumqi River Valley , the Junggar Basin and the Turpan Basin valley wind local circulation with the radiation temperature inversion is an important reason for the formation of Urumqi night deep temperature inversion . Deep nighttime temperature inversion at the same time reduce the upward diffusion of pollutants also greatly reduce the upper and lower momentum exchange , resulting in the increase in the frequency of the ground static wind , reducing the ability of atmospheric pollutants advected .

Related Dissertations

  1. Attitude Control Law Design Based on Blended Lateral Jets and Aerodynamic Control,V249.1
  2. Traffic-pollution Research Based on Line Source Model-a Case Study in Taiyuan,X51
  3. Optical Properties of Chlorphyll-a in Reservoir Water and Its Concentration Inversion Models by Remote Sensing,S127
  4. Qingdao Industrial Atmospheric Pollution Prevention System,X51
  5. Remote sensing data processing grid platform design and initial implementation,TP79
  6. Stress distribution law FLAC 3D simulation study,TU452
  7. The Design and Implementation of the consultancy enterprise project management system,TP311.52
  8. CAN communication wheelchair robot based inversion control,TP242
  9. Excite polarization method tunnel engineering geological exploration Imaging Method research,U452.11
  10. Lacustrine soft soil physical and mechanical properties and the creep characteristics of,U212.22
  11. Serum Insulin-like Growth Factor-1 Determination for Han Healthy Adults in Urumqi,R446.11
  12. Urumqi osteonecrosis Syndrome Distribution Research,R274.9
  13. The Research of Nutrition Knowledge Attitude Behavior and Effect Factors in Urumqi Middle School of Han, Uighur, Kazakh Clan,R151
  14. A Study on Atypical Magnetic Anomaly Interpretation in Deep Prospecting of Handan-Xingtai Area,P631.2
  15. Comparison of LST Retrieval Precision and Sensitivity Analysis Between Two Split-Window Algorithems,P423.7
  16. Integrated Evaluation of Urban Air Pollution and Module Building,X823
  17. Analysis on Stability of Surrounding Rock and Reliability of Hydraulic Tunnel of Yangjiang Nuclear Power Station,TV672.1
  18. Urumqi 2007-2010 influenza viral etiology monitoring and analysis,R181.3
  19. A Study on the Development of Art Education in Urumqi Since the Period of Opening and Reforming,J20-4
  20. A Survey on the Junior Middle School Students’ Use of Motivational Regulation Strategies in English Learning,G633.41
  21. Comparative Research on the Influence of Family Physical Education about Sports Participation Between Uygur and Han Junior School Students in Urumqi,G812.4

CLC: > Environmental science, safety science > The basic theory for the Environment and Science > Environmental Chemistry
© 2012 www.DissertationTopic.Net  Mobile