wind meteorological Articles
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Sensitivity of CTM simulations to meteorological input
The objective of this work is to investigate the sensitivity of an Eulerian Chemical Tranport Model to the reconstruction of the wind field. In the framework of City-Delta exercise, three 14-day simulations have been performed, using the same model (CAMx) and different meteorological inputs; these were built combining large-scale analysis, local observations and the output of a high resolution ...
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Measurements of wind-induced loss of solid precipitation: description of a Norwegian field study
Precipitation measurements have a well-documented and mostly wind-dependent bias which is especially apparent during solid precipitation events. The resulting inaccuracy in precipitation data remains an area of concern in quantifying regional and global climate trends. As a high-latitude country, Norway has many solid precipitation events often accompanied by high wind speeds where the current ...
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ADMS 5 Complex Terrain Validation Westvaco Corporation
1 Introduction The Westvaco Corporation's pulp and paper mill1 in rural Luke. Maryland is located in a complex terrain setting in the Potomac River valley [2]. A single 190-in buoyant source was modelled for this evaluation. There were 11 SO2 monitors surrounding the facility, with eight monitors well above stack top on the high terrain east and south of the mill at a distance of 800-1500 m ...
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Pre-processing of meteorological data: vertical profiles
In the framework of COST-710, working group III aims to recommend formulations of atmospheric vertical profiles of wind, temperature and turbulence. This intermediate report gives a brief overview of existing methods to calculate vertical profiles. A short note on existing datasets for validation purposes is given.Keywords: atmospheric turbulence, turbulence time-, scale, vertical profiles, ...
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Forecast weather alerts for insurance companies
Are weather extreme events increasing in frequency and intensity? Can we attribute these extreme weather events to climate change? In fact, weather extreme events have emerged over the years in the Spanish territory. The dreaded cold drops or DANA, for example, shaking the Mediterranean coast have had a presence over the years, generating strong and damaging storms. However, it has been ...
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Hyd / Met Station in Tupras Izmit Refinery, Turkey - Case Study
The delivered system consists of meteorological and hydrological sensors and data logging equipment for measuring parameters that are of importance for operations in the harbour. Meteorological sensors (wind speed, direction and air temperature) are mounted on a Sensor Cross Arm with a short mast that is placed on the roof of a nearby building (ATEX zone 2). A single cable connects all the ...
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Analysis of an anomalous case of high air pollution concentration in Turin after a foehn event
A case of unusually high concentrations of some urban air pollutants (CO, NO, SO2) in Turin (Northwestern Italy) is presented. This episode occurred during the late afternoon of 7 November 1995. This day was characterised by a strong northern foehn event in the morning, which followed the passage of a cold front. The analysis has been carried out by means of data derived from the urban and ...
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Assessing the impact of particulate matter sources in the Milan urban area
The Chemical Mass Balance (CMB) receptor model of the US-EPA was applied to PM10 data obtained during a field study performed in the Milan urban area, including daily average concentrations, element and ion concentrations. Two chemical fingerprints were estimated to characterise total traffic emissions and diesel engine exhaust emissions. Four main source groups were identified: road traffic, ...
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Vehicle wake factor for heterogeneous traffic in urban environments
Vehicles' 'wakes' are generated as a result of vehicular movements. They are one of the dominant factors in dispersing the pollutants in 'calm' meteorological conditions when wind velocity is Keywords: calm meteorological conditions, heterogeneous traffic, line source models, traffic generated turbulence, urban hotspots, vehicle wakes, wind speed correction factor, wind turbulence, urban ...
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Interaction between air pollution and meteorological parameters in Erzurum, Turkey
In recent years, the rapid increase in population density has caused increases in the consumption of fuel, and the outdoor air quality has deteriorated in the crowded urban areas of Turkey. Erzurum, a city in the eastern part of Turkey, is influenced by air pollutants such as SO2 and suspended particles. It is known that, in general, the air pollution concentrations have a close relationship with ...
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Benefits of Automatic Weather Station for Road Safety
Automatic Weather Station - Weathercom Weathercom is an Automatic Weather Station (AWS). It measures meteorological parameters such as wind speed & direction, rainfall, visibility, UV-radiation, light intensity, temperature, humidity, pressure, etc. Through Weathercom, hyper-local meteorological parameters can be monitored in real-time, which can help to take on-time decisions in case of any ...
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Effects of meteorological parameters on RSPM concentration in urban Delhi
The adverse effect of Respirable Suspended Particulate Matter (RSPM) has become a well-recognised problem in environmental science. Dispersion and dilution of air pollutants are strongly influenced by meteorological parameters, namely wind, turbulence, and atmospheric stability. The analysis of Delhi's air quality data shows that winter is the most critical season with respect to the ...
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Influence of meteorological factors on air pollution concentration for a coastal region in India
A long-term study of measurement of concentration of NOx, SO2 and TSP pollutants have been done in a port and harbour region in India. Monthly measurements of gaseous and particulate pollutants were made at six monitoring stations from January 1997 to December 2000. Meteorological data was also simultaneously collected. In this study, the relationship between monitored ambient air quality data ...
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Development and first tests of a data assimilation algorithm in a Lagrangian puff atmospheric dispersion model
The development of a Data Assimilation algorithm based on variational approach that allows estimation of source emission rate in Lagrangian particle/puff Atmospheric Dispersion Models for non-stationary (wind and source) conditions is presented. The one-dimensional tests including constant and variable in time source emission rate and wind velocity showed that methodology can be extended to take ...
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ADMS 5 Complex Terrain Validation Lovett Power Plant
1 Introduction The Mirant Lovett1 power plant is located in Tompkins Cove, on the Hudson river in the state of New York, about 30 miles upstream of New York city. Terrain elevations vary significantly over the study area, with altitudes in the river valley close to zero and maximum altitudes close to the receptors of approximately 270 m - see Figures 1 and 2. On-site meteorological data ...
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Numerical experiments to determine MM5/WRF–CMAQ sensitivity to various PBL and land–surface schemes in north–eastern Spain: application to a case study in summer 2009
The Community Multiscale Air Quality (CMAQ) model was used along with the Weather Research and Forecasting (WRF) model to study air quality modelling sensitivity to various Planetary Boundary Layer (PBL) schemes and Land Surface Models (LSMs). The performance is assessed and quantified by comparing results with surface observations and the outputs provided by the fifth generation Mesoscale Model ...
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Simple model of the Urban Atmospheric Boundary Layer (UABL)
The horizontally homogeneous atmospheric boundary layer over a rough surface with a large roughness length z0 has been investigated to model the simplest cases of the Urban Atmospheric Boundary Layer (UABL) over a flat plain. It has been demonstrated that the nondimensional profiles of the horizontal Reynolds stresses of eddy viscosity and of velocity defect components are universal and ...
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Wind resource assessment using numerical weather prediction models and multi–criteria decision making technique: case study (Masirah Island, Oman)
The Authority for Electricity Regulation in Oman has recently announced the implementation of a 500 kW wind farm pilot project in Masirah Island. Detailed wind resource assessment is then required to identify the most suitable location for this project. This paper presents wind resource assessment using nested ensemble numerical weather prediction (NWP) model's approach at 2.8 km resolution and ...
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Online Odors Monitoring in Waste Water Treatment Plants
Odors are very distinct air contaminants as they generate nuisances (see note at the end). The factors playing a role in the determination of odor annoyance are : odor concentration and intensity, frequency, appreciation, duration, synergy and location. Chromatotec proposes an automated solution to well identify the origin and the level of odors. Technology Description We offer a comprehensive ...
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ADMS 5 Buildings Validation Alaska North Slope Tracer Study
1 Introduction The Alaska North Slope tracer study1 (see Figure 1) involved 44 hours of buoyant SF$ releases from a 39-in high turbine stack. Tracer sampler coverage ranged over seven arcs from 50 to 3000 m downwind. Meteorological data, including wind speed, wind direction, temperature, sigma-theta and sigma-w, were available from an on-site tower at the 33-m level. Atmospheric stability and ...
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