What causes a weather inversion?
Inversions occur during the winter months when normal atmospheric conditions (cool air above, warm air below) become inverted. Inversions trap a dense layer of cold air under a layer of warm air. The warm layer acts much like a lid, trapping pollutants in the cold air near the valley floor.
temperature inversion, condition in which the temperature of the atmosphere increases with altitude in contrast to the normal decrease with altitude. When temperature inversion occurs, cold air underlies warmer air at higher altitudes.
- Inversion, also called anastrophe, in literary style and rhetoric, the syntactic reversal of the normal order of the words and phrases in a sentence, as, in English, the placing of an adjective after the noun it modifies (“the form divine”), a verb before its subject (“Came the dawn”), or a noun preceding its
- Eversion (from the verb "evert") is the process of turning inside-out. Eversion may refer to: Eversion (kinesiology), the anatomical term of motion denoting the movement of the sole of the foot away from the median plane.
- Lapse rate is the rate at which Earth's atmospheric temperature decreases with an increase in altitude, or increases with the decrease in altitude. Although this concept is most often applied to Earth's troposphere, lapse rate can be extended to any gravitationally supported parcel of gas.
One of the most harmful effects of inversions is that they trap the pollution close to the ground, trapping the smog. When there is a temperature inversion, the affect is just the opposite.
- Long-term health effects from air pollution include heart disease, lung cancer, and respiratory diseases such as emphysema. Air pollution can also cause long-term damage to people's nerves, brain, kidneys, liver, and other organs. Some scientists suspect air pollutants cause birth defects.
- Others include headaches, nausea, and allergic reactions. Short-term air pollution can aggravate the medical conditions of individuals with asthma and emphysema. Long-term health effects can include chronic respiratory disease, lung cancer, heart disease, and even damage to the brain, nerves, liver, or kidneys.
- The solution to pollution is in everyone's hands
- Use Environmentally Safe Products.
- Recycle Your Used Motor Oil and Filters.
- Compost Yard Trimmings.
- Report Illegal Dumping.
- Pick Up After Your Pets.
- Dispose of Trash Properly.
- Use Water Based Paints.
- Recycle Everything You Can.
Atmospheric Effects. Temperature inversions affect air pollution because they change the dynamics of air movement. Warm air rises in the atmosphere because it is less dense and, therefore, more buoyant than the cooler air above it. This smothering effect traps air pollutants and allows their concentrations to increase.
- During an inversion episode, temperatures increase with increasing altitude. The warm inversion layer then acts as a cap and stops atmospheric mixing. Temperature inversions are a result of other weather conditions in an area. They occur most often when a warm, less dense air mass moves over a dense, cold air mass.
- It almost always refers to a "temperature inversion", i.e. an increase in temperature with height, or to the layer ("inversion layer") within which such an increase occurs. An inversion can lead to pollution such as smog being trapped close to the ground, with possible adverse effects on health.
- A subsidence inversion develops when a widespread layer of air descends. The layer is compressed and heated by the resulting increase in atmospheric pressure, and as a result the lapse rate of temperature is reduced.
Updated: 3rd October 2019