نتایج جستجو برای: مدل cmaq
تعداد نتایج: 120450 فیلتر نتایج به سال:
مدل سازی آلاینده های هوا کمک شایانی به درک درست از علل و گستره مشکل آلودگی هوا نموده و برای وضع قوانین صحیح و اتخاذ سیاست های کنترلی مناسب جهت بهبود کیفیت هوا ضروری می باشد. هدف این تحقیق مدل سازی سطح غلظت آلاینده co در کشور ایران بر اثر انتشار منابع آلاینده این کشور بوده است. مدل سازی برای دو هفته با نوسانات آب و هوایی کم و زیاد در فصل زمستان انجام شده است. مدل مورد استفاده در این مطالعه مدل c...
New statistical procedures to evaluate the Models-3/Community Multiscale Air Quality (CMAQ) using observed data are introduced. Certain space–time correlations are used to assess dynamic aspects of CMAQ and to compare the space–time structure of CMAQ to that of observations. Our analyses show that, overall, CMAQ matches the space– time correlation structure of observed sulfate concentrations we...
Comparison between the CMAQ (Community Multi-scale Air Quality Model)-calculated and OMI (Ozone Monitoring Instrument)-retrieved tropospheric NO2 columns was carried out for 2006 over East Asia (100–150 E; 20– 50 N) to evaluate the bottom-up NOx emission fluxes of INTEX-B, CAPSS, and REAS v1.11 inventories. The three emission inventories were applied to the CMAQ model simulations for the countr...
Models-3, a flexible software framework, and its Community Multiscale Air Quality (CMAQ) modeling system form a powerful third generation air quality modeling and assessment tool designed to support air quality modeling applications ranging from regulatory issues to science inquiries on atmospheric science processes. The CMAQ system can address tropospheric ozone, acid deposition, visibility, f...
The horizontal and vertical distributions of aerosol optical properties over China in 2013–2015 were investigated using RAMS (Regional Atmospheric Modeling System)-CMAQ (Models-3 Community Multiscale Air Quality) simulations and CALIOP (Cloud-Aerosol Lidar with Orthogonal Polarization) observations. To better understand the performance of the RAMS-CMAQ model over China, comparisons with the gro...
We have applied the MM5-CMAQ model to simulate the high concentrations in PM10 and PM2.5 during a winter episode (2003) in Central Europe. The selected period is January 15 – April 6 2003. Values of daily mean concentrations up to 75 μgm are found on average of several monitoring stations in Northern Germany. This model evaluation shows that there is an increasing underestimation of primary and...
هدف از انجام این پایان نامه برآورد میزان آلاینده هایی است که از طریق هوا وارد محیط آبی منطقه خلیج فارس می شوند. برای رسیدن به این هدف با کمک مدل cmaq توزیع، پخش و انتقال آلاینده ها در منطقه و در نهایت میزان نشست آن بر آب مدلسازی شده و مورد بررسی قرار گرفته است. برای اجرای مدل نیاز به داده های هواشناسی و میزان نشر آلاینده ها در تمام منطقه بوده است که برای این منظور با کمک مدل mm5 و داده های بزر...
A framework that employs the Volatility Basis Set (VBS) within the Community Multiscale Air Quality Model (CMAQ) was applied to predict organic aerosol concentrations from aircraft emissions. This framework was further expanded to include the formation of secondary organic aerosols from semi and intermediate volatile organic compounds which are traditionally missing from emission inventories us...
Introduction Conclusions References
Two-year CMAQ simulations of gases and aerosols over the southeast are evaluated using SEARCH observations for 2000 and 2001, both by direct comparison to observations and by projecting both datasets to the factor space using the Positive Matrix Factorization (PMF) model. Model performance for secondary species (sulfate, ozone) is generally better than for primary species (EC, CO). Nitrate conc...
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