Showing results for: meteorology data Articles
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Cost 710: status report on working group 1, surface energy balance
This paper presents a brief summary of the work of working group 1 of COST Action 710, harmonisation in the pre-processing of meteorological data for dispersion modelling.Keywords: atmospheric dispersion models, modelling, meteorological data, surface energy balance, air pollution, environmental pollution, ...
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Meteorological data for dispersion modelling: a brief report on the COST 710 programme on pre-processing and harmonisation
Dispersion models need reliable meteorological data to run properly. Some of the meteorological data required by dispersion models are not routinely measured and have to be inferred from other measurements. The purpose of this cooperative study under the COST 710 Action is to improve and harmonise the methods of pre-processing the necessary meteorological input data. This should ensure that ...
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`Sensitivity of Aermod to meteorological data sets based on varying surface roughness,` presented at the 2009 air & waste management association`s annual conference
Abstract Dispersion modeling in support of regulatory programs for federal, regional, state and localpermitting relies on the U.S. Environmental Protection Agency’s AERMOD Model as specifiedin the Guideline on Air Quality Models (40 CFR 51, Appendix W).1 Internal calculations inAERMOD for daytime mixing in the convective boundary layer and night time mixing in thestable boundary layer rely ...
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`Comparison of onsite and NWS meteorology data sets based on varying nearby landuse,` presented at guideline on air quality models: next generation of models conference 2009
Abstract For regulatory modeling conducted in the United States using AERMOD, the United StatesEnvironmental Protection Agency (EPA) recommends the use of onsite measurements whereavailable or in the absence of onsite data five years of reliable, quality assured, andrepresentative meteorological data from a nearby National Weather Service (NWS) station. Incases where both onsite and NWS data are ...
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Meteorological data from numerical weather prediction or observations for dispersion modelling
Synoptic observations of wind speed, direction, cloud cover, precipitation and temperature are inputs to regulatory dispersion modelling. Numerical Weather Prediction (NWP) data generated by national meteorological services are easily formatted for dispersion models. Changing from observations to NWP data raises concerns amongst regulators and model users – how might impact assessments differ if ...
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How health related issues are likely to drive dispersion modelling over the next decade
In the future, the focus of dispersion modelling may centre on the aggregation of sources, atmospheric chemical reactions and longer range transport. This will put greater emphasis on the use of assimilated meteorological data as models are used to assess public policy options to minimise the impacts of air pollutants on human health and welfare. Because of the international nature of threats, ...
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A dispersion model intercomparison archive
The paper introduces a formal archive for intercomparison of conventional regulatory dispersion models. It stems from an initial intercomparison, for the UK Environment Agency, of the USEPA's ISC and AERMOD models with the ADMS model, in common use in the UK. The objective is to compare the models directly with one another via standard test cases in order to reveal differences that may arise in ...
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Factors affecting inter-annual variability of NOx and NO2 concentrations from single point sources. (PDF)
In the application of dispersion modelling for regulatory purposes questions frequently arise regarding the meteorological data used for the study: in particular how many years data are sufficient; is the meteorological site representative of the dispersion site? Although studies have been conducted on the impact of meteorology from different years on ground level concentrations from point ...
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AERMOD Versus CTDMPLUS: A Complex Terrain Case Study
ABSTRACT The American Meteorological Society/U.S. Environmental Protection Agency (AMS/EPA) Regulatory Model Improvement Committee (AERMIC) has updated the Industrial Source Complex (ISC) air dispersion model. The AERMIC model (AERMOD) is capable of predicting ambient pollutant concentrations in simple terrain and elevated terrain. The complex terrain capabilities of AERMOD are of particular ...
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A modelling study of the event-based retention performance of green roof under the hot-humid tropical climate in Kuching
The influences of climate on the retention capability of green roof have been widely discussed in existing literature. However, knowledge on how the retention capability of green roof is affected by the tropical climate is limited. This paper highlights the retention performance of the green roof situated in Kuching under hot-humid tropical climatic conditions. Using the green roof water ...
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`CALPUFF in Odor Modeling: State of the Practice, Recent Developments and Future Improvements,` presented at the A&WMA Emerging Issues in Air Quality Modeling-Canada conference
Overview Background State of the Practice US Canada Potential Improvements CALPUFF Modeling System Meteorological Data Population Exposure Statistics Q&A First, An Apology (or two) I am not Christine Otto I do not spell “odor” with a “u” I do not have lots of pretty graphs to showyou I have drawn the dreaded “just ...
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Evaluation of a non-Gaussian puff model
This paper presents the evaluation of a model based on a general technique for solving the K-equation using the truncated Gram-Charlier expansion (type A) of the concentration field and a finite set of the equations for the corresponding moments. The model can be applied routinely using simple ground-level meteorological data acquired by an automatic network as input. A performance evaluation is ...
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Onsite Meteorological Data - Everything You Need To Know
Most AERMOD dispersion modeling is conducted using meteorological data from a nearby airport. As long as the airport is reasonably representative of your source location, there is nothing wrong with that: airports are often a source of high quality data and located near major population centers and thus, major air pollution sources. But airport data isn’t always the best option for ...
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The Third Workshop's environmental impact assessment model intercomparison exercise
Twelve European modelling teams calculated the impact of a 600 MW power plant, using one of their national regulatory transport and dispersion models. They were asked to report the model results in a uniform way and to provide detailed information on the meteorological data and on the model used. Three modelling teams, from Greece, Germany and Belgium, used the same meteorological dataset. The ...
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Keeping the Increasing Complexity of Air Dispersion Modeling in Check
Driven by advances in scientific knowledge, tightening and constantly changing regulations, and higher-resolution raw data, environmental modeling is demanding more and more from EH&S professionals and their computers. AERMOD run times for large projects are measured in days rather than minutes and terrain data file sizes routinely exceed 100 MB. Modelers can increase productivity and keep ...
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Evaluation of the meteorological data requirements of ADMS-Urban for modelling pollution in Northampton, England
Atmospheric dispersion models are now being used by some local authorities in the United Kingdom as part of their management of urban air quality. Local authorities are also involved in using air pollution model outputs in environmental impact assessments for industrial projects, assessing the impact of road improvement or traffic management schemes and environmental health studies. This study is ...
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Performing CALPUFF Analyses with Pseudo-station Data Derived from MM5 Data
The U.S. Environmental Protection Agency (EPA) recommends that CALPUFF be used as the preferred model for long-range transport analyses in the proposed “Guideline on Air Quality Modeling” (April 2000). In practice, CALPUFF has been routinely required by the Federal Land Managers (FLM), EPA, and state regulatory agencies for Class I area analyses for several years. These analyses include regional ...
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Meteo-geographical data input tools used with ATD Demokritos code
Geographical and meteorological data input tools used with the Demokritos atmospheric transport dispersion code system are specifically designed for dispersion computations over complex terrain. The code initialisation depends mainly on the topography simulator (DELTA), which provides detailed information with respect to orography, land-cover, roughness and inclination, orientation and area of ...
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Evaluation of new generation atmospheric dispersion models
The paper considers the regulatory view of evaluating dispersion models. There is no proscription for regulatory studies in the UK, so differences between dispersion calculations from different models and versions of models are then as important as their absolute veracity. An example shows variations in calculated concentration due to variations between two different versions of a model and two ...
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U.S. EPA Releases 1-Hour NO2 NAAQS Modeling Guidance
The U.S. EPA Air Quality Modeling Group (AQMG) recently released a new guidance document for NO2 modeling. The document outlines procedures that can be used to calculate the NO2 design values for comparison to the new 1-hour NO2 National Ambient Air Quality Standard (NAAQS). The new 1-hour NO2 standard of 100 ppb goes into effect on April 12, 2010. This 1-hour NO2 standard is based on the ...
By All4 Inc.
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