What is Aeroallergens?
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.
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The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.
Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...
Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...
A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.
A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...
A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...
A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...