highCO2

HighCO2 is a term used to describe conditions in which carbon dioxide concentrations exceed typical background levels in a given environment. It is used across disciplines, including atmospheric science, indoor air quality, industrial processes, and aquatic chemistry. In the atmosphere, highCO2 refers to concentrations well above historical baselines; as of the early 2020s, atmospheric CO2 levels exceed 400 parts per million (ppm) and have continued to rise due to fossil fuel combustion and other human activities. In built environments, highCO2 commonly denotes indoor air with elevated CO2 relative to outdoor air, often measured in ppm. For indoor air quality, a threshold around 1000 ppm is frequently used as a benchmark indicating reduced ventilation; higher levels (2000–5000 ppm and above) can be associated with discomfort, headaches, and reduced cognitive performance.

Measurement: CO2 is quantified by infrared absorption or chemical methods. Common meters use non-dispersive infrared (NDIR) sensors; others rely on colorimetric or electrochemical sensors. Monitoring is used for climate studies, building ventilation design, and process control.

Impacts: in the atmosphere, higher CO2 strengthens the greenhouse effect and contributes to ocean acidification, impacting ecosystems. In indoor spaces, highCO2 can affect air quality and occupant well-being. In industrial settings, elevated CO2 can be used as a feedstock or as a safety concern in confined spaces.

Mitigation and context: addressing highCO2 involves reducing emissions, increasing ventilation, and using carbon capture and monitoring technologies. The term is informal and varies by field.