The Challenge Of Natural Hazards Flashcards
what is the parts of the global atmospheric
its split into 3 polar cell ferrel cell hardly cell
what is global atmosphere circulation
is the tansfer of heat from the equator to the poles by the movement of air i.e
how air moves heat around the wold
why dose air move in the first place
air moves due to difference in air pressure wind blow from high pressure to low pressure
what did difference between worn air and cold air
warm air rises and its low pressure
cold air skins and its high pressure
how dose global atmospheric work
the hole system is driven by the equator (which is the hottest part if the earth) the air rises(air warming) at the equator leading to low pressure and rainfall when the air reaches the edge of the atmosphere it cannot go any further and so it travels north and south the air becomes colder and denser and falls creating high pressure and dry conditions at around 30 degrees north and south
why dose it become colder and denser
because its no longer where the equator is
what are the causes of trophicak storms and sequence of their formation of development
sea levels above 27
around summer autumn time
the distance from the equator
8-20 and 5 of the equator
how dose tropical form
the sun heats the ocean to 27 causing it to evaporation
the most warm air rises quickly
the air rises ir cools and it condenses creating large clouds (coulombs)
the large clouds bring lots of rainfall
as makes in form clouds the storm beak up the centre of the storm in strong winds
the air skins in the eye
tropical storm travels across the ocean
how might climate affect tropical storms
increase in temperature may affect where tropical storms occur they might affects places that haven’t experienced it
its fiffuclt to predict
topical storms are getting more intense
why do tropical storms spin
the Coriolis effect makes tropical storms spin
case study typhoon Haiyan
the storm started at 9am Friday in the Philippines it headed south and west
what date did typhoon Haiyan start
feb 2013
how fast did the storm go
195mph
how warm did the sea levels go up to
39 degrees
what was the effects and response to typhoon Haiyan
primary effect
40000homes damaged
strong wind damaged buildings and power lines cut off
secondary
flood caused landscape black roads
30000 fish boats destroyed
power supplies were cut off for a mouth
immediate effects
aid agencies replaced the fishing boats lost
us aircrafts and helicopters helped with search and resume
long term response
cyclone shelter were built to accommodate people evacuated from coastal areas
how to monitor protection and plan tropical storms
planning
educating people is an effective way of ensuring people know what to do
e.g America have hurricane preparedness week
emergency generators allow a back up supply of electricity
hurricane warnings
proteting
shutters can be added to windows
furniture can be stopped to the floor or moved indoors
ensure vehicles have fuel so you can plan a evacuate quickly
monitoring
bicycles can be used to give warnings to remote communities
hurricane watch issues by the national hurricane centre advise when hurricane conditions are possible
weather hazards in the uk
strom
heat wave
snow storms
thunder lightning
flooding
why do uk experience wether hazards
the uk is like a roundabout because it is at the meeting point of several different types of weather from different directions
uk extreme weather conditions in the uk
in 2018 beast from the east
killed 3 people
wind from 6mph - 70mph
brush air way cancelled
schools closed
2022
start Eunice schools closed 2000000 homes were left with nor power
one person died in Iceland
number of people injurys
case study uk Somerset flood
its in the south west of England
what’d dose the sourest flood cause
250mm rain fell in jannurary and feb
high tides and storms sugars swept water up from Bristol Channel
rivers had not been dredged from 20 years ago had become clogged
what were the impacts of the Somerset floods
600 houses flooded (social )
16 farms evacuated(social)
power cut(social)
estimate cost 10million(economic)
heavy swages polluted rivers(envirmoental)
how did we mange the somerset flood
20 million help[ to reduce risk future floods
food defences were built
river band had be raised up
evidence of climate change
ice cones
are cylinders of ice taken from the snow which are found in places like the Atlantic oceans the outer the ice cone are to the ground the older the ice when look at the slice of ice bubbles of c02 more bubbles more c02
tree rings
when you cut a tree if they have bigger rings warmer climate then narrow ruins is wetter climate
melting of glaciers
when the tmeperture has increase the glaciers will melt
what are the possible curses of climate
solar activity
darkspots appear in the sun the number of spots incase or decrease over 11 years when the sun activity is max it gives off more heat
volcanic activity
wept blast of ash and gass into the atmosphere the ash can black the sun reducing temp on the earth this happens in short term affects small droplets like Carrie can reflect the solar radiation
mlaankovit found out that the orbit changes shape
