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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OPSIS Data Services (ODS) is a new service from OPSIS that provides easy management of measurement data. News: OPSIS Data Services (ODS) is a new service from OPSIS that provides easy management of measurement data.

OPSIS Data Services (ODS) is a new service from OPSIS that provides easy management of measurement data. We have made a new video to describe it.

Real-time chemical mapping of a river using OA-ICOS Technology News: Real-time chemical mapping of a river using OA-ICOS Technology

The carbon cycling and conversion to CO2 or CH4 follows specific dynamics in coastal ecosystems that combine water and sediments. In order to better understand this accelerated cycle, a group of marine scientists from Whoods Hole Oceanographic Institution (USA) have developed the gas-powered autonomous surface vehicle (ASV) “ChemYak” equipped with various in-situ sensors for water composition analysis and meteorologic measurements.

A new success for Envicontrol NV! News: A new success for Envicontrol NV! We are proud to announce our success in the tender from Wageningen University & Research News: We are proud to announce our success in the tender from Wageningen University & Research

We have been selected by Wageningen University & Research (WUR) to deliver and service five Gasera One photoacoustic for multi gas analysis and five Multipoint Samplers (MPS) to be installed in livestock barn environment for the analysis of Methane (CH4), Ammonia (NH3), Nitrous Oxide (N2O) and Carbon Dioxide (CO2), gases which can contribute to the global warming.

UNDERSTANDING LEAF TRANSPIRATION MECHANISMS WITH LGR WATER VAPOUR ISOTOPIC ANALYZER News: UNDERSTANDING LEAF TRANSPIRATION MECHANISMS WITH LGR WATER VAPOUR ISOTOPIC ANALYZER

Leaf transpiration is the process in which plant roots absorb water and then release the water in the form of vapour through the leaves. It is an important factor in the water cycle as it is one of the major sources of water into the atmosphere (10%). The leaf transpiration process is nearly identical to perspiration or sweating in animals.

ABB LGR-ICOS GAS Analyzers News: ABB LGR-ICOS GAS Analyzers

Release of natural methane hosted in interstitial water of marine sediments from the sea floor by seep processes is regularly observed on continental margins, and the significance of marine methane seepage contribution to the total atmospheric methane budget and global warming is under debate.  

AIRBORNE MEASUREMENTS OF METHANE FLUX OVER OFFSHORE BLOWOUT BUBBLE PLUME News: AIRBORNE MEASUREMENTS OF METHANE FLUX OVER OFFSHORE BLOWOUT BUBBLE PLUME

Dear Colleagues and Partners, Release of natural methane hosted in interstitial water of marine sediments from the sea floor by seep processes is regularly observed on continental margins, and the significance of marine methane seepage contribution to the total atmospheric methane budget and global warming is under debate. In November 1990, during drilling operations for installation of new offshore well 22/4b in northern North Sea, the company Mobil hit a shallow gas seep at 360 meters below seabed level.

Multi-gas monitoring with gasera one pulse News: Multi-gas monitoring with gasera one pulse

GASERA ONE PULSE is a versatile and easy to use multi-gas monitoring solution. It offers accurate ppb detection at an unbeatable price. It can be configured for a range of uses and is currently in use by our customers in; detecting SF6 leakage, refrigerant leakage, anesthetic gas monitoring, emissions monitoring of greenhouse gases, soil analysis, occupational health and safety, photocatalysis, animal husbandry, and fume hood performance testing.

Please get in contact and we can discuss your gas measurement requirements.

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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5301 LW Zaltbommel
Netherlands

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France

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Belgium

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P +33(0)4 72 79 68 50
F +33(0)1 39 76 07 44
Cours du 3ème Millénaire 333
F-69791 Saint Priest Cedex
France
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