lapse rates

  the rates at which air temperature decreases with altitude. Three types:
  Dry adiabatic lapse rate (DALR) - Saturated adiabatic lapse rate (SALR)

Geography Dictionary & Glossary for Students \\ ITS Tutorial School (ITS) - Hong Kong.

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  • Lapse rate — The lapse rate is defined as the rate of decrease with height for an atmospheric variable. The variable involved is temperature unless specified otherwise.[1][2] The terminology arises from the word lapse in the sense of a decrease or decline;… …   Wikipedia

  • lapse rate — Meteorol. the rate of decrease of atmospheric temperature with increase of elevation vertically above a given location. [1915 20] * * * ▪ meteorology       rate of change in temperature observed while moving upward through the Earth s atmosphere …   Universalium

  • lapse rate — The rate of decrease of an atmospheric variable with height. However, the term normally refers to the fall of temperature with height. The three types of lapse rates referred to in meteorology are dry adiabatic lapse rate, saturated adiabatic… …   Aviation dictionary

  • environmental lapse rate — The lapse rate in the surrounding air within which a volume of air is being lifted. The average rate is 2°C/1,000 ft. This should not be confused with dry adiabatic lapse rate (DALR) and saturated adiabatic lapse rate (SALR), in which the lapse… …   Aviation dictionary

  • Time-lapse — [ frame|right|The flower of a geranium opening over a period of about two hours. Consecutive frames are 7 minutes apart.] Time lapse photography is a cinematography technique whereby each film frame is captured at a rate much slower than it will… …   Wikipedia

  • environmental lapse rate — (ELR)   change in temperature with altitude above a particular point at a particular time. Average is 6.5蚓 per 1000m. Actual rates slower at lower altitude. In summer, rates tend to be quicker than in winter for the same place …   Geography glossary

  • Atmospheric convection — Conditions favorable for thunderstorm types and complexes Atmospheric convection is the result of a parcel environment instability, or temperature difference, layer in the atmosphere. Different lapse rates within dry and moist air lead to… …   Wikipedia

  • conditional stability — In meteorology, it is that condition when the observed lapse rate is between the dry and wet adiabatic lapse rates. Dry and wet adiabatic lapse rates are the rates of fall of the temperature of a mass of dry and saturated air with height when… …   Aviation dictionary

  • absolute instability — As it relates to meteorology, the state of a layer of air within the atmosphere in which a parcel of air, if given an upward push, will move away from its initial level without further outside force being applied. It is that condition in which… …   Aviation dictionary

  • absolute stability — As it relates to meteorology, an atmospheric condition in which the observed lapse rate is less than the saturated adiabatic lapse rate. A mass of air once pushed up will tend to come back to its original level and not rise. This is because it… …   Aviation dictionary

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