Meteorology Today, Ahrens Chap 5 Flashcards
What is Hoar Frost
Water vapor changes directly into ice on structures that fall below dew point
Where are condensation nuclei most commonly found
Industrial cities, as those release lots of smoke and pollution for water to condense
Can hygroscopic condensation nuclei cause condensation before 100% relative humidity
Yes, as low as 75%
What is Radiation Fog and how does it form
Radiation fog is fog that forms when radiative cooling of the Earth at night causes temperatures to drop and water vapor to condense
Weather associated with Anti-Cyclones
Clear days and light/no wind
What is advection fog and how does it form
When the surface is cooler than the air above, transfer of
heat from moist air to surface cooling the air to its dew point and producing fog.
What is Upslope fog and How does it form
Upslope Fog is fog that forms as moist air flows up along an elevated plain,
hill, or mountain. It forms when the moist air moves upward, causing it to cool and reach dew point
What cloud produces a halo around the sun
Cirrostratus
Describe Cirrus clouds
Clouds with white, feathery patch with a faint wisp of a tail at one end.
Describe Cirrocumulus clouds
small, rounded, white puffs that may occur individually or in long rows
Describe Cirrostratus clouds
thin, sheetlike, high clouds that often cover the entire
sky
Describe altocumulus clouds
gray, puffy masses, sometimes rolled out in parallel waves or bands. Often contains parts of the cloud dark and other parts light
Describe Altostratus clouds
Clouds with blue or gray color that cover the entire sky, making the sun very dim or even “watery”
Describe Nimbostratus clouds
dark-gray, “wet”-looking cloud layers associated with more or less continuously falling rain or snow
Describe Stratocumulus Clouds
low, lumpy clouds that appear in
rows, in patches, or as rounded masses with blue sky visible between individual cloud elements
