Atmospheric Monitoring Articles

Atmospheric Pressure Interface for the Modular ioniTOF Platform The ioniTOF is our modular and flexible, entry-level to high-resolution Time-of-Flight platform, featuring custom interfaces and high-performance IONICON hexapole ION-GUIDEs. All our renowned PTR-TOFMS series products are exclusively based on the ioniTOF. Now we took this concept one step further and developed an Atmospheric ...

Nov. 13, 2018

By Ionicon Analytik Ges.m.b.H.

The Centre for Process Innovation (CPI) is a UK-based technology innovation centre and the process arm of the High Value Manufacturing, Catapult. CPI enables businesses to develop, prove, prototype and scale up the next generation of products and processes.  CPI operates across a broad range of technologies including; Industrial ...

Jun. 4, 2018

By Analox Sensor Technology

We’re big fans of food and we’re big fans of gas here at Analox (sometimes, depending on what we’ve eaten, the two aren’t mutually exclusive…) Today, we’re looking at how nitrogen can be used in the food and beverage industry – from factories, to restaurants to pubs… ...

Dec. 17, 2017

By Analox Sensor Technology

The main objective of this study is to develop a general methodology for predicting soil temperature based on general circulation data. To meet this demand, we used temperature data that can be profitably used to predict soil temperature in a period of 20 years. Accordingly, air temperature data were downscaled to 2016–2025 based on LARS-WG data. The obtained results indicated that the model ...

Feb. 5, 2017

By IWA Publishing

A dispersion model for continuous releases of pollutants in the atmospheric boundary layer is applied to study the influence on modelled concentrations of different estimates of the key micrometeorological variables that represent the dispersion processes. The modelling approach is based on the advection-diffusion equation and includes profiles of wind and eddy diffusivity for the entire ...

Nov. 30, 2014

By Inderscience Publishers

We use a Lagrangian stochastic micromixing model to predict the concentration fluctuations of a continuous release in a neutral boundary layer. We present the computational algorithm that implements the interaction by exchange with the conditional mean model and we compare the numerical solutions with the experimental values in order to evaluate the reliability of the model. The influence of the ...

Oct. 15, 2014

By Inderscience Publishers

Computational fluid dynamic (CFD) modelling of pollution dispersion and chemical conversion to aerosol particles in the atmospheric boundary layer (ABL) has been studied. The investigation focused on the numerical modelling above complex orographic terrains of urban areas and industrial sites including the dispersion of toxic substances in the air as a result of accidents. A finite-rate model of ...

Aug. 4, 2014

By Inderscience Publishers

This work describes the two-way coupling performed between the regional atmospheric model Brazilian Regional Atmospheric Modeling System (BRAMS) and the hydrological model MGB-IPH. As a first step of the atmosphere-hydrology coupling, only the water balance variables were coupled. Differences in temporal and spatial scales between MGH-IPH and BRAMS were analyzed. By default, MGB-IPH has a daily ...

Jun. 17, 2014

By IWA Publishing

The competitive adsorption of boric acid and chromate from aqueous solutions by alumina has been investigated by spectrophotometry at pH 8, ionic strength = 0.0, 0.1 and 1.0 M NaClO4, T = 22 ± 3 °C and under normal atmospheric conditions. The experimental data show that addition of excess boric acid in the system leads to the increase of Cr(VI) ...

Jan. 28, 2014

By IWA Publishing

Models of atmospheric pollutant transport need information about the structure of the atmospheric boundary layer (ABL). The most important characteristics for such applications are the parameterisation of the stable boundary layer (SBL) and the mixing layer height (MLH). Recently, many different schemes have been employed to calculate the SBL height, but there are many problems with applying ...

Dec. 27, 2012

By Inderscience Publishers

Analysts monitoring for atmospheric carbonyls follow prescribed methods published by the US Environmental Protection Agency, the California Air Resource Board, and the American Society for Testing and Materials (ASTM®). These methods call for trapping carbonyls on an adsorbent coated with dinitrophenylhydrazine (DNPH). Sigma Aldrich offers more than fifty 2,4-DNPH carbonyl derivative ...

Jun. 11, 2012

By MilliporeSigma

Here, only some data can be modified. The necessary data is:   Pollutant emission rate (g/m s): This is the pollutant emission rate.   Decay coefficient (1/s): This coefficient considers the half life of the pollutant if this ...

Dec. 13, 2011

By Canarina Environmental Software

The evaluation of mesoscale model simulations against experimental data on the vertical profiles of mean meteorological parameters and surface turbulent momentum and heat fluxes for Sofia, Bulgaria, is presented. The simulation of the vertical profiles is currently a weak point in mesoscale modelling, and needs investigation in view of the numerous practical applications.Keywords: Bulgaria, ...

Sep. 18, 2011

By Inderscience Publishers

A modified version of the atmospheric model RAMS6.0 is used to simulate the flow in the MUST experiment, within the framework of the COST732 Action. A standard version of the k-ε turbulence closure model and its renormalisation group version, RNG k-ε, were implemented in the model. Simulations were performed to test the suitability of using the model to reproduce the flow and turbulence in the ...

Feb. 7, 2011

By Inderscience Publishers

Next generation atmospheric models are required to provide a realistic assessment of different types of chronic and acute environmental conditions and forecast the consequences on population health. These tasks were usually carried out with epidemiological studies, which are not adequate to indicate health effects. Therefore, models should be capable to carry out hazard identification, ...

Feb. 7, 2011

By Inderscience Publishers

This work investigates the Saharan desert storms direct effect, through the assessment of regional-scale Desert Dust (DD) aerosol Radiative Forcing (RF). Simulated parameters, obtained from atmospheric modelling, are used. The effect over different surfaces on the dust RF is analysed and the stratospheric ozone is considered. In the presence of DD aerosols, a shortwave cooling and a longwave ...

Feb. 2, 2011

By Inderscience Publishers

In this work the comparisons between measured and numerically simulated tracer experiments are presented for two different datasets. Different versions of the model system RMS, including the Regional Atmospheric Modelling System (RAMS) and the dispersion model SPRAY, accounting for alternative turbulence closures are used. These last are the Mellor and Yamada model level 2.5 and two versions of ...

Jan. 11, 2010

By Inderscience Publishers

In this work, we report a numerical and statistical comparison between Advection-Diffusion Multilayer Method (ADMM) and Generalised Integral Laplace Transform Technique (GILTT) approaches to simulate a radioactive pollutant dispersion in the Atmospheric Boundary Layer (ABL) using micrometeorological parameters generated by Large Eddy Simulation (LES). To better describe the wind profile of the ...

Dec. 14, 2009

By Inderscience Publishers

This paper discusses the main principles of atmospheric diffusion modelling for regulatory purposes in Russia. They include the choice of air quality criteria, the development of universal models to calculate on a single base the dispersion of atmospheric pollutants from different types of source under unfavourable meteorological and topographical conditions, as well as experimental verification ...

Sep. 16, 2009

By Inderscience Publishers

The Norwegian Institute for Air Research (NILU) has carried out a year of direct measurements of standard deviations of wind fluctuations (σv and σw) on an island off the west coast of Norway. These measurements have been used for the evaluation of estimated values based on the meteorological pre-processor MEPDIM. The physical basis for this metprocessor is provided by parameterisation ...

Sep. 14, 2009

By Inderscience Publishers