Storm Flashcards
Condistions needed for tropcial storm/cyclone to form?
1 - Temp 26-27 and 50 m deep
2 - Rekatuvly strong winds so swirling motion woll form byt stsme won’t be ripped apart
3 - Congernce zone of lowa dn high air pressure so less dnese ir rises more readily and clouds can form
4 - Rotation: only froma round equator as no corlilos at eqautor no less 5 from each side
5 - A trigger e.g high ocena temp, area low [ressure
What is a tropical strom?
= large spinning storms withs rng winds and teerntail rain
Path tropcial storms?
1 - Move W due to E winds tropics + move away fro euator due to crlios effect
2 - Lose strntgh as yhey move over land as suppy warm moist air stopped
Features tropical storms
1 - Ciruclar - spin naticloskiswe NH clockwse SH
2 - last 1-2 weeks
3 - centre strom - eye - low pressure system
4 - ririnsg air spirals in eye cause strong winds
5 - outflow high mositrue air from eye - tehrefore clouds either side eye
In what locations do tropical storms occur? (4)
Eastern Asia - 33%
East Pacific - 17%
West Austrailia - 13%
Caribbean - 11%
Forms of strom hazards?
1 - High winds - destory builidnsg, uproot trees, carryu debris
2 - Strom surges - large rise sea level cause by high winds pushing water towards the coast
3 - Heavy rain - warm moist air cools and condesnes
4 - Flooding -
5 - Landslides - water indilirtaes soil ,less stable , – landlsides
How can infastructure be developed to withstand a tropical storm? (3)
1 - Using reinforced concrete
2 - Securly fixing roofs
3 - Building infrastructure on stilts
Risk management to reduce impacts storm hazards?
ST
LT Prevention: - can't be prevented - path can be predicted Prrepardness: - train emergcy servuces - Gov plane evac routes - Education Adaptration: - reifncred concrete - fiixng roofs securly buildisng stilts
Mage, freq, pred, reg
Pred:
Satellite imgayr identiy certain cloud formatiomns - tell when S forming
storm can then be tracked using sat - therefoe path troocal strom pred fairly accuratly
Mag:
- Saffir siampson scale
- measures windspeed
- 1-5 (strongest)
- estaimtes damage 1-5
Freq
- more freq NH - June - Nov + SH N - A
global wamring - increasing freq
Ireegualr as many factors that dertmine where riepical srom will form and hit
Decsirbe formation tropical strom?
1 - Warm moist air rises, creating low pressure system causing warm surrudning air to move into system and rise
2 - warm air rise, colls condesnes clouds dew point
3 - System spinning due to CE - AC NH C SH
4 - addition E warm arir –> storm spin fasetr and increased wind speed - 40mph = TS
5 - Cool dry air descneds on the eye –> calm waether
6 - Eeywall syrounds eye = moset pwerful area strom - warm moist air rapdily rises - very hifh WS + rain – 75 mph = cyclone
7 - Storm reaches the coast + large vol water takne inot system and rleeased as a a highwave (strorm suge)
8 - Once at land no longer supply warm moista ir therfere eye collapse