# GG101 Lecture Notes - Eugenius Warming, Nimbostratus Cloud, Cool Air

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Published on 14 Apr 2013
School
WLU
Department
Geography
Course
GG101
Page:
of 1
2013-02-25
- Surface windectors. (Midterm)
Cyclones:
- if the isobars are very closely spaced this means that the expectation of the
wind velocity is very strong and the pressure is higher.
- Circulation goes into the low and then into a counter clockwise rising.
- Why are wave cyclones so important
o This is a associated with the passage of these kinds of systems.
- Review major steps in text
Cold
-------------------L -----------------------
Warm
Cyclogensis: the air starts to rotate in a CCwise rotation
- this causes the warm air to push into the cold and the cold air to push into
the warm.
Open Stage: this is where there are well developed cold and warm masts
- blue lines is the isobars
- black triangles is warm air
- half moons are the cold air
- red aarows shows movement of air.
- Because the cool air rises and moves faster than the warm front.
o The means that the cold air mas is pushing the warm air mass faster
than the warm can push the cold
Occulded Stage:
- this is when the cold air mass catches up to the warm air mass and it pushes
the warm air off the surface
- tend to get more of a mixed cloud, either a nimbostratus or culustratus
Global Climate
- The difference between weather and climate.
- Weather is the day to day fluctuations
- Climate is more or less the statistics or the characteristic of that area or
location.
o What is the average temperature for that month etc.
o Average is calculated over a 30 year period
o This then determines the average or the normal conditions.

## Document Summary

Cyclones: if the isobars are very closely spaced this means that the expectation of the wind velocity is very strong and the pressure is higher. Circulation goes into the low and then into a counter clockwise rising. Why are wave cyclones so important: this is a associated with the passage of these kinds of systems. Cyclogensis: the air starts to rotate in a ccwise rotation. Warm this causes the warm air to push into the cold and the cold air to push into the warm. Open stage: this is where there are well developed cold and warm masts. Occulded stage: this is when the cold air mass catches up to the warm air mass and it pushes the warm air off the surface tend to get more of a mixed cloud, either a nimbostratus or culustratus. Weather is the day to day fluctuations.