Air Dispersion Modeling Articles
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How the New Zealand National Institute of Water and Atmospheric Research informs policy and public health with hyperlocal air quality mapping
NIWA has pioneered the use of dense air quality sensor networks to uncover block-by-block air pollution patterns within towns across New Zealand. 40 Clarity Node-S solar-powered air quality sensors deployed 3x Higher PM2.5 levels detected in air pollution hotspots compared to cleanest areas 6 km Maximum distance NIWA deployed Clarity sensors downwind to capture pollution plumes Across New ...
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The consequences of wildfires for air quality - and why it`s important to have a real-time air monitoring network for wildfire season
Wildfires have a severe impact on air quality and, consequently, on human health. While wildfire smoke’s damage can vary depending on its composition and density across an area, research shows that it may not only have short-term damage but perhaps also a cumulative negative impact on human health. However, by recognizing the need for real-time air quality monitoring to collect data and ...
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How Do Silver Nanoparticles Kill Bacteria?
Silver nanoparticles (AgNPs) are particles composed of silver atoms, and their particle sizes are usually in the range of 100 nm. Due to their unique physical and chemical properties, silver nanoparticles have been widely used in medical, food, health, consumer, and industrial fields. These properties include optical, electrical, and thermal, high electrical conductivity, and biological ...
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CALRoads View - Hourly Concentration Output in CAL3QHCR
CALRoads View includes three mobile source air dispersion models: CALINE4, CAL3QHC, and CAL3QHCR. These models are used for predicting air pollution concentrations of carbon monoxide (CO), nitrogen dioxide (NO2), particulate matter (PM), and other inert gases from idle or moving vehicles. The CAL3QHCR model is enhanced to process up to one year of hourly meteorological data. However, the output ...
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4 Best Industrial SO2 Gas Detectors
Why do you need a gas detector? In the process of industrial production, flammable, toxic, harmful gas leakage occurs from time to time, will cause serious threats to personnel, equipment, production, life. The main causes of leakage are: 1. Material defects in production equipment or containers. 2. The sealing ring and the sealing ring are not tightly sealed. 3. The welding place of the ...
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Oil Spill Cleanup Methods: How Experts Tackle Environmental Disasters
When an oil spill occurs, it can have devastating effects on the environment and local wildlife. These spills can occur for a variety of reasons, including accidents, natural disasters, or human error. Fortunately, experts have developed a variety of effective oil spill cleanup methods that can help mitigate the damage caused by these disasters. One of the most common oil spill ...
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Bioreactor Design Evolution
What is a Bioreactor?In simple terms, a bioreactor is a vessel in which a biological reaction (bioprocess) takes place under optimal controlled conditions to achieve maximum product formation. We are quite familiar with today’s bioreactor design – a modern glass or stainless-steel bioreactor, however the truth is that bioreactors date back thousands of years.The History of BioreactorsIn 2004 ...
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Richmond launches citizen air monitoring network - Richmond, CA - Case Study
As part of the California Air Resources Board (CARB) AB617 Community Air Monitoring Program, Clarity deployed a 50-sensor network in Richmond, California with Groundwork Richmond and Ramboll SHAIR. The network is used to evaluate pollution sources and hotspots in the industrial city, as well as engage community members in environmental ...
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Oil Spill Cleanup
Oil spills are a serious environmental problem that can have devastating effects on wildlife, aquatic life, and the natural environment. They are also a significant hazard for communities and businesses that rely on clean water and pristine landscapes. Fortunately, organizations like Delta Remediation are working to prevent and clean up oil spills effectively and sustainably. With our ...
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CALPUFF View - Changing the Default Text Editor
Most air dispersion models use simple text files for reading inputs and writing output data. To display these files, Lakes Environmental’s applications use the system’s default text editor. Users may prefer to use a different text editor to utilize different functionality or format data differently. To take advantage of these additional features, you can change the default text editor ...
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Your local waste management operation spends more time on odour management than you think
When it comes to odour management at landfills, it’s widely accepted that prevention is better than a cure. Any possibility of slightly reducing odour impact can save navigating the fallout of a disruptive situation for waste management operations and local communities. However, odour is notoriously difficult to measure and manage. Moreover, limiting the impact of offensive odours is a ...
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Aermod View - Data Substitutions in Aermet
When conducting an air dispersion modeling analysis, it is very important that the meteorological data quality is as high as possible. AERMET – the meteorological pre-processor for the AERMOD dispersion modeling system – contains internal options which can boost data quality by filling short gaps of missing cloud cover and temperature data. AERMET utilizes linear interpolation for ...
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The People that Power Clarity: Jack Kodros, Air Quality Data Scientist
As Air Quality Data Scientist, Jack Kodros works with our Lab team to research new methods for calibrating our low-cost sensors and evaluate and study their performance under various environmental conditions, taking a scientific and research-oriented approach to understanding and improving sensor performance. His background as a Research Scientist at Colorado State University and his Ph.D. in ...
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Applicability Assessment of Coherent Doppler Wind LiDAR for Monitoring during Dusty Weather at the Northern Edge of the Tibetan Plateau
Abstract: Wind profile light detection and ranging (LiDAR) is an important tool for observing features within the atmospheric boundary layer. Observations of the wind field and boundary layer height from coherent Doppler wind LiDARs (CDWLs) under sandy and dusty weather conditions were evaluated using observations from two CDWLs and one GTS radio sounding located at the northern edge of the ...
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AERMOD View - Debug Output Files
When conducting an air dispersion modeling analysis with the AERMOD modeling system, modelers may encounter situations where they want to validate or verify the model’s calculations. To support this, the model has the ability to generate Debugging Output Files of intermediate calculation results. This is controlled by the Control Pathway using the DEBUGOPT model keyword. As the ...
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Cerex FTIR and UVDOAS for Rules 1180 and 12-15 Compliance
Criteria gases, VOCs, Acids and Organics pre- sent refineries with a challenging list of compounds to monitor. The Cerex AirSentry FTIR adds significant capability to our UV Sentry to simplify 1180 and 12-15 compliance with a minimum of hardware and a single software and integration platform. Both the AirSentry FTIR and UV Sentry data streams are readily integrated into plume ...
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Aermod View - New Alpha Options in Aermod 22112
With the latest release of the AERMOD model dated 22112, the U.S. EPA has continued to expand the formulated capabilities of the model. Most of these updates have been added as ALPHA non-default options, a concept we covered in a previous modeling tip. AERMOD 22112 contains 6 new ALPHA options which are described below: Platform Downwash Taken from the Offshore and Coastal Dispersion Model ...
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INVENT iTURBO®-Blower - a move away from standard machine size manufacture
Submerged aeration systems are ubiquitous in modern wastewater treatment plants, dispersing bubbles of air below the water surface enabling the transfer of oxygen to the water for the growth and activity of the treatment bacteria. Integral with any submerged aeration system is a pressurised supply air source to compress air for release below the water surface.The new INVENT iTurbo®-Blower has ...
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Human health risks due to rising air pollution
Air – One of the main necessities for the survival of human beings. The quality of the air which we breathe needs to be good. But with an increase in urbanization, its negative consequences do tag along. One of those consequences is air pollution. In recent years, air pollution has become one of our society’s pressing challenges. The quality of air has deteriorated to an extent that ...
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SAGE Advice on Air Cleaners
The UK’s Scientific Advisory Group for Emergencies (SAGE) Advice on Virus Air Cleaners The UK’s Scientific Advisory Group for Emergencies (SAGE) has produced timely advice on the effectiveness and safety (or otherwise) of air cleaning technologies and devices in the context of fighting COVID-19. While the advice focusses on pre-Airora technologies, it is a valuable contribution as ...
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