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

Mercury (Hg) contamination of small human‐made ponds and surrounding terrestrial communities may be 1 of the largest unstudied Hg‐pollution problems in the United States. Humans have built millions of small ponds in the Great Plains of the United States, and these ponds have become contaminated with atmospherically deposited mercury. In aquatic ecosystems, less toxic forms of Hg deposited from ...

May 24, 2015

By John Wiley & Sons, Ltd.

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

An improvement in the electrical properties of the films is absolutely required for the application of ZnO thin film in electrical devices. And the conventional dry etching process is accompanied by the generation of physical defects, degradation of the properties. The electrical property of direct-patternable, graphene-incorporated ZnO thin film prepared by photochemical solution deposition was ...

Jun. 2, 2013

By Inderscience Publishers

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

The present study investigated the potential effects of cholinesterase (ChE)‐inhibiting pesticides on western pond turtles (Emys marmorata) occupying streams in two regions of California, USA. The southern region was suspected of having increased exposure to atmospheric deposition of contaminants originating from Central Valley agriculture. The northern region represented reference ChE ...

Dec. 10, 2012

By John Wiley & Sons, Ltd.

Contaminants used at low elevation, such as pesticides on crops, can be transported tens of kilometers and deposited in adjacent mountains in many parts of the world. Atmospherically deposited organic contaminants in the Sierra Nevada Mountains of California, USA, have exceeded some thresholds of concern, but the spatial and temporal distributions of contaminants in the mountains are not well ...

Dec. 10, 2012

By John Wiley & Sons, Ltd.

The need to track and analyse the atmospheric deposition of mercury and trace metals in the Pensacola (Florida) Bay Watershed in recent years has resulted in the need for a data management system that will allow data to be efficiently stored, checked for errors, manipulated, retrieved for analysis and shared within the research community. In this paper, we describe a relational database that was ...

Jun. 17, 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