cloud types masood
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S tudents
C loud
O bservations
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The CERESExperiment:
Question:
What is the Effectof Cloudson theEarths Climate?
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Global Cloud Cover: 50-70%
is soimportant
about a few
Clouds in
the Sky?
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How do
clouds
transmit
and/or
reflect
radiation?__________
Do clouds
cool down
or heat up
the Earths
climate?
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Remote Sensing
Remote sensing has been defined as "a technique usedto gather information about an object or an area without actually
touching it. Our eyes, ears, and skin, as well as more sophisticated
instruments, all aid us in remote
sensing.
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Cloud Types and Levels
Cloud Cover
Visual Opacity
(Percentage)
(How much light penetrates the cloud)
CUMULUS
CIRRUS
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Do you have any CLOUD
EXPERIENCE?Well, I have looked at clouds in the sky since I was a little
kid. One time I saw a cloud that looked like.
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Any other experience with clouds?
I cant think of any, Im in a FOG.
Thats it! Yes, Ive been in a CLOUD.
Ive walked through FOG
(a cloud formed near the ground)
Lets get out of this fog and move into clearer visibility.
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Necessary Ingredients:
Hygroscopic nuclei consist of particles such as
sea salt which have an affinity (attraction) for
water. Water vapor condenses on these particles.
WATER (vapor)
CHANGE INTEMPERATURE
(cooler)
CONDENSATIONNUCLEI (aerosols)
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Just over 200 years ago (in 1803),
Luke Howard used Latin words to
name the cloud types.
Cumulusmeans pile and describes heaped, lumpy cloudsCirrusmeans hair and describes wispy looking clouds.
This term is also used to describe high level clouds
Stratusmeans layer and describes clouds that form in
sheets and do not have any unique features
Cumulusmeans pile and describes heaped, lumpy clouds
Cirrusmeans hair and describes wispy looking clouds.
This term is also used to describe high level clouds
Stratusmeans layer and describes clouds that form in
sheets and do not have any unique features
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Nimbusmeans rain and describes low grey rain clouds
Altodescribes mid level clouds
Cumuluslumpy Cirruswispy Stratus - layered
Contrailsshort for condensation
trails are the only man-made cloud
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Cumuluslumpy Cirruswispy Stratuslayered
Nimbusraining Altomid-level Contrails - streaks
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Cumuluslumpy Cirruswispy Stratuslayered
Nimbusraining Altomid-level Contrails - streaks
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Cumuluslumpy Cirruswispy Stratuslayered
Nimbusraining Altomid-level Contrails - streaks
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Cumuluslumpy Cirruswispy Stratuslayered
Nimbusraining Altomid-level Contrails - streaks
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Imagine that you are
looking through a window.
Notice the dark grey patches on the cloudslack of light.
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Note the silhouette of the sunthere is some
light penetrating through the cloud cover.
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Note the clear outline seen of the sun despite
the cloud cover.
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LETS OBSERVE!
Lets make an
observation
on what we
see on this
beautiful day!
What cloud
types are
present?
Whats the
percentage of
cloud cover?
How much
light
penetrates
the clouds?
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CLOUD CLASSIFICATION
THE 27 STATES OF SKY
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LOW CLOUDS
POLAR REGIONSSurface - 6,500 ft
Surface - 1,981 m
TEMPERATE REGIONSSurface - 6,500 ft
Surface - 1,981 m
TROPICAL REGIONSSurface - 6,500 ft
Surface - 1,981 m
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LOW CLOUDS
CL= 1
Cumulus of little vertical development, or ragged cumulus.
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LOW CLOUDS
CL = 2
Towering cumulus (TCU): Cumulus of moderate or greater vertical development
LOW CLOUDS
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LOW CLOUDS
CL= 3
Cumulonimbus (Cb) -- Cumulus of great vertical development (no cirrus anvil)
LOW CLOUDS
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LOW CLOUDS
CL= 4
Stratocumulus (Sc) formed by the spreading of cumulus
LOW CLOUDS
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LOW CLOUDS
CL= 5
Stratocumulus (SC) notformed by the spreading of cumulus
LOW CLOUDS
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LOW CLOUDS
CL= 6
Stratus (St) in a relatively continuous layer, or ragged shreds (other
than that of bad weather), or both
LOW CLOUDS
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LOW CLOUDS
CL= 7
Low clouds in the form of stratus fractus (StFRA), cumulus fractus (CuFRA), or
both, usually below altostratus (As) or nimbostratus (Ns).
LOW CLOUDS
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LOW CLOUDS
CL= 8
Cumulus (Cu) and stratocumulus (Sc; notformed by the spreading of cumulus)
with bases at different levels
LOW CLOUDS
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LOW CLOUDS
CL = 9
Cumulonimbus (Cb), where the upper part of at least one of the (Cb) clouds in clearly
fibrous or striated. By convention, code figure 9 is used for Cumulonimbus Mammatus
(CbMAM) and those cases in which lightning, thunder, or hail indicates the presence of a
Cb but the top is hidden by darkness or other clouds
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MIDDLE CLODS
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MIDDLE CLODS
CM= 1
Altostratus (As): Predominantly transparent or semitransparent
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MIDDLE CLODS
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MIDDLE CLODS
CM = 4
Altocumulus standing lenticular (AcSL): AC in the form of semitransparent
patches (often fish-shaped, almond-shaped, or lenticular) continuously
changing in appearance and occurring at one or more levels
MIDDLE CLODS
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MIDDLE CLODS
CM= 5
Altocumulus (Ac) progressively invading the sky
MIDDLE CLODS
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MIDDLE CLODS
CM= 6
Altocumulus (Ac) formed by the spreading or flattening of Cu or Cb
MIDDLE CLODS
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CM= 7Altocumulus (Ac) at two or more levels, not progressively invading the
sky; or, opaque Ac at one level, not progressively invading the sky; or,
altostratus (As) or nimbostratus together with Ac.
(Note: This code is generally used as a catch-all by weather observers)
MIDDLE CLODS
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CM = 8
Altocumulus Castellanus (AcC): Altocumulus in the form of turrets or battlements or
AC having the appearance of small cumuliform tufts, with or without altostratus (As)
or nimbostratus (Ns)
MIDDLE CLODS
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CM= 9
Altocumulus (AC) of a chaotic sky, with or without altostratus (AS) or
nimbostratus (NS).
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HIGH CLOUDS
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HIGH CLOUDS
CH= 1
Cirrus (Ci) in the form of thin filaments, strands, or hooks (not
progressively invading the sky)
HIGH CLOUDS
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HIGH CLOUDS
CH= 2
Cirrus (Ci) in predominantly dense patches or with sproutings in the form of small tufts
or battlements
HIGH CLOUDS
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HIGH CLOUDS
CH = 3
Dense cirrus (Ci) (often in the form of an anvil) originating from cumulonimbus (Cb)
HIGH CLOUDS
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G C OU S
CH= 4
Cirrus (Ci) in the form of hooks, filaments, or strands, invading the sky
and generally growing denser
HIGH CLOUDS
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CH= 5Cirrostratus (Cs) (with or without cirrus) progressively invading the sky, and the
continuous veil extends 45 degrees or less above the local horizon
HIGH CLOUDS
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CH= 6
Cirrostratus (Cs) (with or without cirrus) progressively invading the sky,
and the continuous veil extends more than 45Oabove the local horizon
but does not cover the whole sky
HIGH CLOUDS
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CH= 7
Cirrostratus (Cs) covers the entire sky. (Note: The example shown here
also includes condensation trails, or contrails.)
HIGH CLOUDS
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CH= 8
Cirrostratus (CS) doesnot cover the entire sky
and is not invading the
celestial dome
HIGH CLOUDS
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CH= 9
Cirrocumulus (Cc) alone, or predominant when compared with combined sky
cover of any cirrus (Ci) or cirrostratus (Cs) present