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Examining relationships between trace gases and criteria pollutants
Examining relationships between trace gases and criteria pollutants during winter in a mountain valley

Examining relationships between trace gases and criteria pollutants during winter in a mountain valley

In order to protect public health, the United States Environmental Protection Agency (EPA) has established national ambient air quality standards for six of the most common air pollutants—carbon monoxide, lead, ground-level ozone, particulate matter, nitrogen dioxide and sulfur dioxide—known as “criteria air pollutants”. The presence of these pollutants in ambient air is generally due to numerous diverse and widespread sources of emissions.



In order to protect public health, the United States Environmental Protection Agency (EPA) has established national ambient air quality standards for six of the most common air pollutants—carbon monoxide, lead, ground-level ozone, particulate matter, nitrogen dioxide and sulfur dioxide—known as “criteria air pollutants”. The presence of these pollutants in ambient air is generally due to numerous diverse and widespread sources of emissions.

A recent publication (attached) in the Journal of Geophysical Research reported the scientific work by a group of environmental scientists from University of Utah who closely examined the relationships between trace gases and criteria pollutants in Utah’s Salt Lake Valley. In particular they studied the relationship between excess CO2 -above baseline conditions- and other pollutants during various stages of particulate pollution episodes (no/during/after pollution). The work was performed in winter over 2 months, with a special focus during a week when cold air pools inhibited atmospheric mixing and enhanced pollutants accumulation. Various greenhouse gases and criteria pollutant measurements were performed from sample inlets situated at 33m above the ground. An LGR Ultraportable Greenhouse Gas Analyzer was used to measure CO2 and CH4 concentrations.


co2 processes


Cities are responsible for 70% of anthropogenic CO2 emissions globally. There is an ongoing global effort to measure CO2 in urban areas and master the processes controlling carbon emissions. The aim of the survey was to analyze relationships between urban CO2 concentrations and air pollutants in order to better understand transport and chemical processes during various meteorological conditions. The authors found that the excess CO2 is a good indicator (proxy) of the presence of co-emitted gaseous criteria pollutants and a reasonable indicator of fine particulates PM2.5. They also observed that the relationships between CO2 and criteria pollutants differ during different phases of cold air pool events which provide insight into meteorological and transport processes.


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Monitoring low levels of formaldehyde in ambient air News: Monitoring low levels of formaldehyde in ambient air

Formaldehyde, chemical formula HCHO or CH2O, is a colorless gas with a pungent odor. Levels above 0.1 ppm can cause allergy and acute health problems, e.g. sore throat, skin irritation, nausea, scratchy eyes and cough. Formaldehyde (HCHO) is also classified as highly carcinogenic compound. Exposure to moderate amounts of HCHO has been linked to cancer, such as leukemia.

New carbon dioxide isotope analyzers News: New carbon dioxide isotope analyzers

Stable isotopes act as tracers for studying flows and fluxes of material through ecosystems and the atmosphere. In practice, scientists measure the stable carbon isotope content of air, plants and soil to quantify many phenomena including the recycling of carbon dioxide within forests, water use efficiency, partitioning ecosystem carbon exchange into its components, gross primary productivity and ecosystem respiration, and to identify and quantify the distribution and contributions of plant species to global productivity. In addition, stable isotopes of carbon may be used to determine the effectiveness of carbon sequestration strategies. For these studies, investigators require fast, accurate measurements over a wide range of carbon dioxide concentrations.

ABB LGR-ICOS Carbon Dioxide Isotope analyzers exceed all of these requirements.

Cloud Condensation Nuclei (CCN) counter News: Cloud Condensation Nuclei (CCN) counter

Droplet's CCN-100/200 measures the count and size of individual aerosol particles that can form into cloud droplets. Its fast response time allows use in either airborne or ground-based stations.

Photoacoustic detector for solid, semi-solid and liquid samples News: Photoacoustic detector for solid, semi-solid and liquid samples

The INRAe of Narbonne has bought an ultra-high performance photoacoustic detector for solid, semi-solid and liquid samples (a PA301 module produced by Gasera). The PA301 is used as an accessory for any FTIR device. Last week, the Envicontrol team provided on site setup and a full training has been given.

Flux measurements News: Flux measurements

Los Gatos Research (LGR) now offers more analyzer choices to measure surface-atmosphere fluxes. Traditionally, there are four main flux measurement techniques: Eddy Covariance, Relaxed Eddy Accumulation, Gradient and Chamber-based. Though carbon dioxide and water vapor are the most common greenhouse gases measured, in many ecosystems a number of different gases must be measured. LGR's technology has improved rapidly over the years and new analyzers are now available allowing scientists to expand their research by measuring other greenhouse gases such as methane, nitrous oxide, carbon monoxide, ammonia, and carbonyl sulfide.

Envicontrol Germany News: Envicontrol Germany

Envicontrol is increasing his presence in Europe with the setup of a subsidiary in Germany. Envicontrol GmbH is now fully established in Köln.

From Germany, for any commercial request, please contact Hans Helsen. For technical support, contact Tobias Könemann.

We are close to our customers and will be even closer tomorrow.

VMM choose our NOx analyzers News: VMM choose our NOx analyzers

The Vlaams Milieu Maatschappij (VMM) has chosen to work with Envicontrol for the NOx monitoring within the Flemish air quality monitoring network. The T200 analysers from TAPI will take place soon and 45 units are foreseen to be delivered before the end of 2021.

Measuring ships SO2 emissions with OPSIS News: Measuring ships SO2 emissions with OPSIS

Last week during the ship's stopover at the harbour of Antwerp, the Envicontrol team has maintained the OPSIS analyser monitoring CO2 and SO2 on the “Nabucco” vessel.

We participate in various fairs and seminars around Europe where we can keep you informed of the latest developments and possibilities in the field of measurement and analysis equipment. Below you will find an overview of the events we visited recently and the events where you can meet us soon.

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Envicontrol Belgium

P +32 (0) 81 713 491

Rue Phocas Lejeune 25
B-5032 Les Isnes
Belgium

Envicontrol Deutschland

P +49(0)221 7907 7054

Waidmarkt 11
DE-50676 Köln
Deutschland

Envicontrol France

P +33(0)1 39 76 04 19

Route de Sartrouville 54
F-78230 Le Pecq
France

Envicontrol Nederland

P +31(0)418 651 158

Valeton 25
5301 LW Zaltbommel
Nederland
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