Weather and Climate_ Lab 5
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Weather and Climate
Lab 5
General Circulation of the Atmosphere
This lab will investigate the general circulation of the atmosphere over a year's time.
Also, regional winds
will be investigated at the end of this lab.
Please visit the provided websites to answer the questions.
General Circulation Model for one year
http://www.youtube.com/watch?v=qh011eAYjAA
1.
What pressure system is responsible for the storms that move across the midlatitudes during
the winter months?
Low pressure system is responsible for the storms that move across the mid-latitude during the
winter months.
2.
What pressure system is responsible for the persistent clouds and storms across the tropical
regions?
Low pressure system is responsible for persistent clouds and storms across the tropical regions.
3.
What pressure system keeps the West Coast of the US mainly cloud free during most all of the
summer months?
High pressure systems having moist air moving over a gold surface
4.
In what direction do the storm systems move from the southern Pacific Ocean to the southern
Atlantic Ocean throughout the year?
Storm systems move southeast from the southern Pacific Ocean to the southern Atlantic Ocean
throughout the year.
5.
In what direction to mid latitude cyclones move across the midlatitudes in the northern
hemisphere?
Mid-Latitude cyclones move counterclockwise across the mid-latitudes in the northern
hemisphere.
6.
What pressure system keeps North Africa mainly cloud free and dry during the summer
months?
Low pressure systems keep North Africa mainly cloud free and dry during the summer months.
7.
What pressure system brings some stormy weather to the north coast of Africa during the
winter months?
High pressure systems bring some stormy weather to the north coast of Africa during the winter
months.
8.
On Aug. 14 there is a typhoon nearing the coast of southeast Asia ... .what pressure system
deflects and steers this typhoon first to the north west then north and eventually northeast into
the north Pacific Ocean?
Low pressure systems deflect and steer the typhoon from the north west then north, and
eventually southeast into the pacific ocean.
9.
During what month does the cloud cover begin to dramatically increase across the Indian
Subcontinent and what pressure system is the cause of this stormy weather that takes place
throughout the summer months?
During the months of June to October the cloud cover begins to dramatically increase across the
Indian Subcontinent, with high pressure systems causing the stormy weather that happens.
10.
Do the persistent summer clouds and storms from the Indian Subcontinent advance
northward into the Tibetan Plateau?
If so, how many months do they persist…if not, what natural
factor disallows their advancement northward into interior Asia?
Yes, they advance to the Tibetan Plateau, they persist for a few months.
11. During what time – in terms of months – does Central America experience persistent cloud
cover and storms?
What pressure system is responsible for this type of weather?
Persistent storms occur in September and October. They come from high pressure systems.
12. During what time – in terms of months – does central Australia experience persistent cloud
cover and storms?
What pressure system is responsible for this type of weather?
January-March is when Australia experiences the most storms. High pressure systems are
responsible for this weather.
13.
During what months does south central to extreme southern Africa experience cloudy, stormy
weather?
Cloudy, stormy weather is experienced from December to February with some rain to cool things
down.
14.
During what nearly 30 day period of time does the greater Amazon River Basin experience the
least amount of stormy weather?
What pressure system is responsible for this respite of stormy
weather?
July, August, and September is when they experience the least amount of stormy weather. This is
caused by low pressure systems.
15.
During what months of the year does the Arabian Peninsula experience the most cloud cover
and storms and what pressure system is responsible for this type of weather?
May and June is when the Arabian Peninsula experiences the most cloud cover and storms. High
pressure systems are responsible for this.
Regional Winds
Southwest US Monsoon
https://www.youtube.com/watch?v=TiLCiyic4Ew
16.
Briefly, please explain the meteorological particulars associated with the Southwest US
Monsoon in terms of pressure systems.
In the middle of the monsoon season the moisture in the atmosphere has softened up, which
leads to some flash floods, dust storms, and wind. In the later part there are more tropical storms, the
atmosphere is more moisturized which leads to more flooding.
17.
During what time of the year does this natural phenomena occur and typically how long does
each individual event last? What is the safety message to drivers to stay safe during such an
event?
The natural phenomenon usually occurs in the fall. The safety message to drivers is to get off the
roads and not to go out driving.
18. What are some of the benefits of the monsoon rains, what are some of the dangers of the
monsoon?
Some benefits are that the rains bring in more water which is important for crop production. Some
dangers are flash floods, winds, lightning extreme heat, wildfires, thunderstorms, and dust storms.
Santa Ana Winds
https://www.youtube.com/watch?v=0V_davWV1II
19.
Briefly, explain the pressure conditions in the atmosphere that leads to Santa Ana Winds and
how the topography of southern California enhances the impact of these winds?
The pressure condition is a combination of the high and low pressure. The direction is what
causes the conditions, and the pressure is controlling the heat through these winds.
20.
Briefly, explain the impacts of these winds for populated areas in southern and northern
California and provide some recent wildfire examples, too.
The impacts of these winds for populated areas is that it can create wildfires. An example is the
wildfire in 2022 that caused dozens of buildings to burn as the wind from a wildfire in California's Sierra
Nevada traveled and created more fires nearby.
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