A meteorological report indicates that a dominant anticyclone (high-pressure system) has centered over an inland region. Which atmospheric condition is most directly produced by the vertical air movement at the center of this system?
- AWarm, ascending air that cools to saturation, generating overcast skies and steady precipitation
- Cool, descending air that warms adiabatically, suppressing cloud formation and creating mostly clear skiesAnswer
- CRapid surface wind convergence that forces strong vertical convection and severe thunderstorm development
- DIntense evaporation caused by rising thermal columns that supercool the upper troposphere
Answer
Cool, descending air that warms adiabatically, suppressing cloud formation and creating mostly clear skies
In a high-pressure system (anticyclone), air sinks toward the surface in a process known as subsidence. As the air descends, it experiences higher atmospheric pressure, compressing and warming adiabatically. This warming increases the air's capacity to hold moisture and lowers relative humidity, which halts condensation and dissipates existing clouds, yielding dry and fair conditions.
Step-by-Step Solution
Key Concept
Atmospheric Pressure Systems and Vertical Air Motion
Estimated Time:1m 0s