Haze is primarily found in the atmospheric boundary layer, which is the lowest part of the troposphere.
This means haze concentrates in the layer of air closest to the Earth's surface, extending upwards to a varying height depending on the degree of vertical mixing. Think of it as a blanket of particles suspended in the air we breathe, closest to the ground. This mixing is influenced by factors like temperature, wind, and terrain.
Because haze forms due to pollutants and particulate matter mixing in the atmosphere, it's most commonly found:
- Near industrial areas: Factories and other industrial activities release pollutants that contribute to haze formation.
- Urban areas: Vehicle emissions, construction, and other city-related activities are major sources of haze-forming particles.
- Downwind of pollutant sources: Wind carries pollutants away from their source, leading to haze in downwind areas.
- Areas with stagnant air: When air is still, pollutants accumulate, leading to increased haze. This is often exacerbated by temperature inversions, where a layer of warm air traps cooler air below.
- Regions affected by wildfires: Smoke from wildfires contains large amounts of particulate matter that can create widespread haze.
So, while haze can technically be found anywhere to some degree, it's most concentrated in the lower atmosphere, especially in and around areas with significant pollution sources or stagnant atmospheric conditions.
