678954_gw-project _1
TRANSCRIPT
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WHAT IS GLOBAL WARMING?
Refers to the long term increase in temperature which is global
in nature.
Disturbs balance between hot and cold
areas in the atmosphere.
Caused by the increase in GHG(CO2,CH4,N2O),they act as
a blanket resulting a rise in temperature
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CONTRIBUTION OF GHGS TOWARDS
CLIMATE CHANGE
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CLIMATE CHANGE AND GLOBAL
WARMING
Climate should not be confused with weather.
Climate change refers to variation in global and
regional climates over time
Changes the climate system as a whole shifting the
average pattern.
Climate change and global warming are co related
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CAUSES OF CLIMATE CHANGE AND
GLOBAL WARMING
. Human activities ..main cause
Burning of fossil fuels - emit excess GHGs
making a thicker blanket of ghgs increasing heat
Forest destruction
Increase in co2
Industrial pollution
Incorrect waste management
Depletion of land and soil
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IMPACTS
Coastal ecosystem:
Includes mangrooves, coral reefs, sea grass, marine life
Vulnerable to the effects of frequency changes in rainfall and
level rise May be damaged by warmer sea temperature
disasters
Can cause high tides, storms, floods, seismic sea
waves(tsunami)
46 mn people on an average are affected
economic impacts
Damages economic sectors
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many coastal communities are affected
increase in global warming is leading to the increase in various
infections
disruption of sanitation, drainage, sewage disposal, system
psychological and other illnesses
transmission of diseases and breeding of insects
Many industries set up at the coastal regions can be harmed
in turn affecting the Indian economy
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THE INDIAN SITUATION
Mean temperature increase of 3 to 5 degree C by end of century
more pronounced in north
20% rise in Indian monsoon
More extreme extremesespecially over west coast of India and
west central India
Reduced crop production due to increased temperature and higher
CO2 content
An increase in cyclones in Bay of Bengal
Flooding of low lying areas producing climate refugees
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INDIAN COASTLINE
Total length from Sunder bans in West Bengal till the Rann of
Kutch in gujarat-5700km.
Lakshadweep, Andaman and Nicobar group of islands
constitute-1810 km
few major coastal ports
Mumbai, Chennai, Vishakhapatnam, Kolkata, Kochi and Goa
Western coastline has a continental shelf having an area of
0.13mn sq. km.
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CRZ
Coastal regulation zone is the boundary from the high tide lineup to 500m in the land -ward side.
Four categories:
CRZ I : Ecologically important areas like national parks
CRZ II: Already exploited to some extent like drainage etc.
CRZ III: Undisturbed areas not included under I & II.
CRZ IV : Coastal areas in Andamans, Lakshadweep and other smallislands.
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THE GREATEST THREAT- SEA LEVEL RISE
Inundation of coastal colonies
India is one of the 28 countries endagered from sea level rise
Total area of 5763 sqkm and 4.6% of the coastal population
would be affected
Most vulnerable areas-gujarat,mumbai,south
kerala,lakshadweep islands
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DISPLACEMENT OF COMMUNITIESFacts:
Reports say-sea level rise between 15 to 38 cm can affect tens of
thousands of people at the coasts
A meter rise today would displace 7 million people
Sudhir Chellarajan(IIT professor)has determined that by the end of
the century 12 million people would be displaced in west Bengal
The problem of coastal refugees would start irking the governments
soon : their rehabilitation, compensation and effect on economy..
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BYE BYE BEACHES.
Threatning to chew up beaches of Vishakhapatnam. In the past
month it has gouged 75 metre of the section through erosion
Puris beaches are slowly disintegrating
Climatic factors and man made development is causing heavy
toll on the beaches of Goa. Water has started to enter close to
solid ground.would affect tourism and local coastal
communities
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GLOBAL WARMING CAUSING CHANGE
IN MONSOONS Changes in the monsoon pattern in India are expected to result
in severe floods, droughts
Scientists predict a 3-5 degree rise in temperature causing a
20% increase in summer rainfall.
A vast population depends upon rainfall for their livelihood
Changes in water cycle can cause diseases such as malaria,
cholera, hepatitis,etc.
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SEA WATER INTRUSION
The vulnerability area increases with every 0.5 m rise in
sea level.
Maximum near the creeks and minimum along main coast.
Irrigated agriculture, coastal activities , tourism at risk
Saline water may make land unfit for agriculture
Two islands already vanished from Sunder bans displacing
7000 people. Two more islands at risk.