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Formation of Fog

The document discusses the formation of dew and frost, highlighting how clear nights lead to cooling and moisture for plants. It explains the role of condensation nuclei in cloud formation and the impact of hygroscopic particles on fog and haze. Additionally, it covers the increase in radiation fog due to air pollution in California and the characteristics of advection fog along the Pacific Coast.

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Daniela Amor Casas
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11 views10 pages

Formation of Fog

The document discusses the formation of dew and frost, highlighting how clear nights lead to cooling and moisture for plants. It explains the role of condensation nuclei in cloud formation and the impact of hygroscopic particles on fog and haze. Additionally, it covers the increase in radiation fog due to air pollution in California and the characteristics of advection fog along the Pacific Coast.

Uploaded by

Daniela Amor Casas
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PPTX, PDF, TXT or read online on Scribd
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THE FORMATION OF DEW

ADVICTION FOG
THE FORMATION OF
DEW AND FROST
• Clear nights cause
infrared radiation to cool
Earth's surface, forming
dew that freezes if
temperatures drop below
freezing, especially on
grass blades, providing
moisture for plants
during low rainfall.
Condensation nuclei
• Cloud condensation
occurs due to
condensation nuclei,
airborne particles
condensing water vapor,
found in the lower
atmosphere near Earth's
surface, entering through
sources like dust,
Enter title
Haze

• Hygroscopic particles like


ocean salt and table salt
condense water vapor at
lower humidity, while
sulfuric and nitric acid
particles resist
condensation, causing
haze, fog, and clouds.
FOG

• Condensation of water vapor


on hygro-scopic nuclei at low
humidity reduces visibility,
grayish landscapes, and wet
fog. Dirty city air has thicker
fog, posing health risks.
RADIATION FOG
• Radiation and conduction cool
nighttime air near the ground,
forming ground fog. Common in
late fall and winter, it forms
upward from the ground and
evaporates first around its
periphery.
• California experienced
a significant increase in
tule fog days from 1930
to 1970 due to air
pollution, with dense
radiation fog in the
Sierra Nevada range
increasing by 75% from
1980 to 2016.
Advection
Fog
• Advection fog, formed
when warm, moist air
cools to its dew point
along the Pacific Coast,
forms around caribou
herds and dissipates as
summer winds carry it
inland.
Thank
you

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