Atmospheric Modeling - Air and Climate Information

Articles & Whitepapers

New issues in dispersion modeling

Sulfur Dioxide (SO2 ) In 2010, the US EPA finalized a new 1-hour National Ambient Air Quality Standard (NAAQS) for SO2. Since that time, a number of guidance documents have been issued by the US EPA to clarify the modeling procedures needed to demonstrate compliance. The tighter SO2 NAAQS standards have resulted in more refined analyses of interactions between sources (culpability analysis) as ...

Atmospheric Microplastics Collecting in National Parks

A new study has tracked dispersal of the particles following atmospheric patterns over long distances Plastic is slow to break down on a molecular level, but it readily breaks into smaller and ...

Climate Change: Threshold For Dangerous Warming Will Likely Be Crossed Between 2027-2042

The threshold for dangerous global warming will likely be crossed between 2027 and 2042 - a much narrower window than the Intergovernmental Panel on Climate Change's estimate of between now and 2052. In a study published in Climate Dynamics, ...

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Sampling System for Atmospheric Aerosol Model

Sampling from ambient air is not trivial. Conditions such as temperature, humidity, wind speeds and wind direction are variable. Furthermore, diffusion losses particularly from the smallest particles can significantly change measurement results. The Technical Specification CEN/TS 16976 aims at harmonizing the continuous measurement of particle number concentration in ambient air. It describes a ...