Chapter 8.7 - Climatology Flashcards
How far does the Tropics cover the earth’s surface?
30°N to 30°S.
In the middle latitudes, the weather is mainly governed by what (2)?
- Frontal Depression.
- Subtropical Ridge.
What is the name given to the zone of low pressure between Frontal Depression and Subtropical Ridge?
Equatorial Trough.
During Summer Time in the Southern Hemisphere, where does the Equatorial Ridge form in Latitude?
15°S.
During Winter Time in the Southern Hemisphere, where does the Equatorial Ridge form in Latitude?
15°N.
What are Trade Winds?
Wind in the Tropics outside the 15° zone either side of the Equator blowing towards the East.
In Latitude, where does the Trade Wind centre along the Subtropical Ridge?
32°N and 32°S.
What happens to Trade Winds which in contact with Friction from the Surface in the Southern Hemisphere?
Wind deflects to the right becoming South-East Trade Winds.
What happens to Trade Winds which in contact with Friction from the Surface in the Northern Hemisphere?
Wind deflects to the left becoming North-East Trade Winds.
Name two common meanings for Monsoon?
- The Season.
- Seasonal Winds.
Name three characteristics of an Equatorial Trough?
- Large Areas of Convective Activity.
- Light and Variable Winds.
- High Temperatures.
What does ITCZ stand for?
Intertropical Convergence Zone.
Define ITCZ?
Narrow ‘frontal’ zone within the Equatorial Trough.
Name three special terminology that is used to identify the intensity of cyclones that occur in the tropics?
- Tropical Disturbance.
- Tropical Depression/Storm.
- Tropical Cyclone.
Name the four stages of a Tropical Cyclone?
- Formative.
- Developing.
- Mature.
- Dissipating.
During the Formative Stage of a Cyclone, what will happen to Surface Pressure?
Fall close to 1000hPa.
During the Formative Stage of a Cyclone, what will happen to Windspeed?
Increase to Gale Force (34kts).
True or False. The Formative Stage of a Cyclone will take between a few hours to several days to complete?
True.
During the Developing Stage of a Cyclone, what will happen to Central Pressure?
Falls below 1000hPa.
During the Developing Stage of a Cyclone, what will happen to Windspeed?
Above Gale Force (34kts) and Hurricane Force (64kts) in some places.
During the Mature Stage of a Cyclone, what will happen to Surface Pressure?
Stops falling and remain constant between 975hPa and 950hPa.
During the Mature Stage of a Cyclone, what is the average and large sizes of a Cyclone?
600 to 1100 miles in diameter.
Name three different decaying mechanisms for a Tropical Cyclone?
- Movement over Cold Water.
- Movement over Land.
- Strong Upper-level Windshear.
During the Dissipating Stage of a Cyclone, what will happen to Surface Pressure?
Begin to rise.
