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a ppt based on the clouds and their study, the categories it is divided into, simple description including pictures.

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  1. 1. A seminar
  2. 2. CLOUDS: definition • Clouds is a visible mass of liquid droplets or frozen crystals made of water or various chemicals suspended in the atmosphere above the surface of a planetary body. • The study of clouds, called nephology, signifies clouds into various categories, some important and widely used categories are: Cumulus Stratus Cirrus Cumulonimbus Cirrocumulus Altocumulus Stratocumulus Altostratus
  3. 3. Types of clouds
  4. 4. Cumulus Altitude- 2000m above Abbreviation-Cu • Have a noticeable development and clearly defined edges. Described often as ‘puffy’ or ‘cotton-like’ in appearance. • Often associated with instability, moisture & temperature gradient. Usually present when the air is warm.
  5. 5. Stratus Altitude- 60,000 ft above Symbol- -- • Belongs to a class categorized by horizontal layering with uniform base. Considered as ‘typical cloudy day’. • Indicate prolonged cloudy weather with drizzle. Persist for days in anti-cyclone weather.
  6. 6. Cirrus Altitude- 20,000 ft above Symbol- Ci • Characterized by thin, wispy strands, giving them their name. Generally appear in white or grey color. • Form due to outflow of tropical cyclones. Indicate weather deteoriation. Can be long enough to stretch continents.
  7. 7. Cumulonimbus Altitude- 500 to 13,000 ft Abbreviation- Cb • Very tall and dense and flat surface on top. Involved in thunderstorms and other inclement weather. • Result of atmospheric instability. Creates lighting and other severe weather conditions. Some form a single cell (or) cloud.
  8. 8. Cirrocumulus Altitude- 20,000 ft above Abbreviation- Cc • Result of parcel environment instability or temperature difference. • Consists of small amount of liquid water droplets in super cooled state. Ice crystals also a predominant component. Short-lived and have large tuft.
  9. 9. Altocumulus Altitude- 6,500 to 20,000 ft Abbreviation- Ac • Usually white or grey. Often occurs in sheets or patches with wavy rounded masses or rolls. • Signal upcoming thunderstorms. Found in warm and cold fronts of depression. • used as warning cloud by aviation industry along with cumulus and cumulonimbus.
  10. 10. Stratocumulus Altitude- 8000 ft above Abbreviation- Sc • Characterized by large dark, rounded mass usually in groups, lines or waves. Found in subtropical and polar oceans. • Signified as ‘dull weather’. They indicate storms and dull weather.
  11. 11. Altostratus Altitude- 6,500– to 20,000 ft. Abbreviation- As • Characterized generally as uniform gray to bluish-gray. Formed by a rising large air mass that condenses into cloud and spread across the horizon. • Can be composed of either water droplets or ice crystals.