This PPT is about Global Warming and its Effect. This contains all about natural and human disasters like floods, droughts, and glacier melting. This Ppt has a piece of detailed knowledge about global warming and its effect on our earth and our human lives.

1. GLOBAL WARMING AND IT‘S
EFFECT

2. CONTENT
 Introduction of Global Warming
 Causes Of Global Warming
 Impacts Of Global Warming
 Droughts
 Floods
 Level Rising Temperature Of Oceans/sea
 Tornados
 Hurricanes
 The Melting Of Mountain Glacier
 The Reduction Of Snow Cover
 Coastal Erosion

3. INTRODUCTION
 Global Warming is the term used to describe a gradual increase
in the average temperature of the Earth’s atmosphere and its
oceans, due to which permanently change occurs in the Earth ‘s
climate.

4. CAUSES OF GLOBAL WARMING
 Most of the climate scientists are agree that the main cause of the Global
Warming is due to the “green house effect”.
 They may be other cause like
 Respiration
 Mining activities
 Rapid industrialization
 Increased in auto mobile use

5. GREEN HOUSE EFFECT
CARBON DIOXIDE(C02)
METHANE(CH4)
NITROUS OXIDE(N20)
CHLORO FLUORO CARBONS(CFCS)

6. SOURCE OF GREEN HOUSE GASES

7. FLOODS & DROUGHTS
CAUSED BY
GLOBAL WARMING

8. DROUGHTS CAUSED BY
GLOBAL WARMING
 A drought is an extended period of dry whether caused by a lack of rain
 Increased temperature cause more evaporation
 Some places will receive greater concentrations of rain and other places will
receive less(droughts)

9. HOW FLOOD IS CAUSED BY
GLOBAL WARMING
 A flood is an overflow of water that submerges land which is usually dry
 The rate of evaporation from the ocean seems to be incresing

10. EFFECT OF FLOOD TO IRRIGATION
 Embankments of barrages and rivers
 Damage underground piping system
 Destroy agricultural crops
 Affect the water table
 Damage Head Canal
 Affect Whole Irrigation System

11. LEVEL RISING
TEMPERATURE OF OCEAN
&SEA

12. RISING TEMPERATURE OF OCEAN&SEA
 Rising temperature of ocean and sea may be more significant than the direct
effect of higher temperature.
Because….
 The world's agricultural output is heavily dependent on irrigation.
 Out of a global cropped area of 1500 million ha, 16% is irrigated.
 Global warming is likely to have a major impact on the hydrological cycle and
consequently on irrigated agriculture.

13. RISING TEMPERATURE OF OCEANS & SEA
 As we have discussed that atmospheric temp raises due to green house effects so it
raises the temp of sea/ocean on the following two mechanism
 Two major mechanisms are causing sea level to rise.
 First, shrinking land ice, such as mountain glaciers and polar ice sheets, is releasing
water into the oceans
 Second, as ocean temperatures rise, the warmer water expands. Trapped within a
basin bounded by the continents, the water has nowhere to go but up. :

14. RISING TEMPERATURE OF OCEANS & SEA
 The consequences of sea level rises due to temp include
 Threats to coastal communities
 Some 40% of the world’s population lives within 62 miles of the ocean.

15. TORNADOES AND HURRICANES
CAUSED BY GLOBAL WARMING

16. TORNADOES
 Tornadoes:
 A tornado is rapidly spinning air that develops from a thunderstorms and is on
the ground.
 The ingredients for a tornado are a thunderstorm, winds changing speeds
with height and rapidly rising air.

17. HURRICANES
 Hurricanes:
 A hurricane is a huge organized thunderstorm complex that develops over the
ocean
 The ingredients are warm ocean water, weak upper level winds, and low
pressure

18. IMPACTS OF TORNADOES & HURRICANES
 Flooding:
 Heavy rains and ocean waters brought ashore by strong winds can caus
 e flooding in excess of 50 cm (20 in) over a 24 hour period.
 Impacts to Agriculture
 As hurricane winds, rainfall, and storm surge cause direct and indirect effects on the
environment, this can also impact agriculture.
 Storm Surge:
 An abnormal increase in the ocean's level, sometimes in excess of several meters high.

19. MELTING OF GLACIERS CAUSED BY
GLOBAL WARMING

20. MELTING OF GLACIERS

21. MELTING OF GLACIERS
 Over a Thousand years ago, Asians used to irrigate their lands by the melted
water from glaciers.
 During Warm season, snow melts slowly, releasing a steady flow of water.
 Over the last few decades, Glaciers are melting at a torrid pace as an adverse
effect of Global warming & climate change.

22. MELTING OF GLACIERS
 Effects of Glacier Melting:
 Reduced water for agricultural use
 Shrinkage of river based irrigated land
 Contamination of coastal groundwater supply
 More floods & droughts
 Mudslides, dam break etc.

23. THANK YOU
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EARTHFROMGLOBALWARMING