- Languages: English, Spanish, French
- Publish Date: 2003-03-20
- Last Updated On: 2016-10-05
- Skill Level: 1
- Completion Time: 1.50 - 2.00 h
- Includes Audio: yes
- Required Plugins: none
Coastal Weather, Mountain Meteorology
- Included in Courses:
Mountain Weather Distance Learning Course, Review of Aeronautical Meteorology, Review of Aeronautical Meteorology - Africa, Tropical Aviation Forecasting, Dynamic Meteorology, Mesoscale Meteorology
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After completing this lesson, the learner should be able to do the following:
With regard to the description of gap winds:
- Recall where in a gap the strongest wind speeds are typically observed.
- Describe the different kinds of topographic gaps and their effect on gap flow.
- List at least 3 natural hazards that may be associated with gap winds.
With regard to the structure of gap winds:
- Describe how wind speed varies through the gap during a gap flow event.
- Describe the temperature profile through a gap during a gap flow event.
- Describe the pressure profile through a gap during a gap flow event.
With regard to the origin of gap flows:
- Describe the conditions required for geostrophic flow.
- Recall that gap winds are typically non-geostrophic.
- Describe the origin of the pressure gradients that occur across gaps.
- Recall that the thinning of low-level cool air at a gap exit can increase the pressure gradient across a gap.
- Recall that adiabatic warming of downslope winds can increase the pressure gradient across a gap.
With regard to forecasting gap winds:
- Qualitatively describe how varying the following factors affects wind speed through a gap:
- Pressure gradient
- Surface roughness
- Gap length
- Describe the horizontal resolution of a mesoscale model required to accurately forecast flow through a gap.