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4dmanns 4dmanns Presentation Transcript

  • Dan Manns
  • Adiabatic temperature changesand expansion and cooling When temperature changes even though there has been no changes to the heat. It happens because air gets compressed and is allowed to expand.
  • Orographic lifting Orographic lifting is when elevated land, like mountains, act like a barrier to air flow. View slide
  • Frontal wedging Frontal wedging is when cooler, denser air acts as a barrier over which the warmer less dense air rises. View slide
  • Convergence Convergence is whenever air in the lower atmosphere flows together lifting results.
  • Localized convective lifting Pockets of air being warmed more than the surrounding air.
  • Stability If a volume of air was forced to rise, its temperature would drop because of expansion. If this volume of air was cooler than the surrounding environment, it would be denser, and if allowed to do so, it would sink to its original position.
  • Condensation When water vapor in the air changes to a liquid.
  • Types of clouds Types of clouds are based on their shape and height Cirrus Cumulus Stratus
  • High clouds There are three high cloud types: Cirrus Cirrostratus cirrocumulus
  • Middle clouds Middle clouds are about 2,000-6,000 All middle clouds have alto before their name.
  • Low clouds Stratus clouds are the clouds that usually cover most of the sky. Sometimes they produce precipitation. Nimbostratus create most of the precipitation.
  • Clouds of vertical development Clouds of vertical development have low bases but extend upward.
  • Fog Fog is physically the same as a cloud. Fog is the result of radiation cooling or the movement of air over a cold surface. Fog is on the ground.
  • Cold cloud precipitation (Bergeronprocess) The Bergeron process relies on supercooling and supersaturation. Water that is below o degrees Celsius is supercooled. When air is saturated it is supersaturated.
  • Warm cloud precipitation In warm clouds, clouds are formed by the collision-coalescence process. Some water absorbing particles can remove water vapor from the air when it is not saturated.
  • Rain and snow Rain is a drop of water that falls from a cloud and has a diameter of at least 0.5 mm. When the temperature is low, snow is made up of six sided ice crystals.
  • Sleet, glaze, and hail Sleet is particles falling of clear ice. Glaze happens when raindrops become supercold. Hail is smalls ice pellets.