Thermal inversion.
A thermal inversion forms when a warm layer of air traps a cooler layer of air close to Earth's surface. The cold air ends up at the surface when the mountains block the morning sunlight from warming the floor of the valley or particulate pollution blocks sunlight from reaching the surface.
The increased aerosols in the urban atmosphere reduce the incoming solar radiation and increase the atmospheric longwave radiation in the urban areas. The response of the surface to the change of absorbed radiation is strong at night and weak during the day.
The warm air above cooler air acts like a lid, suppressing vertical mixing and trapping the cooler air at the surface. As pollutants from vehicles, fireplaces, and industry are emitted into the air, the inversion traps these pollutants near the ground, leading to poor air quality.
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Under The Northern Command
Answer:
North America, the Europeans initially found a profitable commodity when fishermen began to barter with natives for <u>Fur</u>.
Explanation:
Before any type of settlement in Canada, the fisherman of Europe, namely: France, Spain and England used to bring metal cooking instruments, glass jewellery and types of armory to Northern America and trade them for exotic animal furs the natives would hunt and catch.
The territory of the united states , congress of confederation of the united states
