Sea level rise and it's Effects

1. SEA LEVEL RISE
AND EFFECT.

2. What is sea level ?
-The level of the sea's surface, used in reckoning the
height of geographical features such as hills and as a
barometric standard

3. What is Mean sea level ?
- Mean sea level (MSL) is an average level of the
surface of one or more of Earth's oceans from
which heights such as elevations may be
measured

4. What is Sea level rise ?
- A sea level rise is an increase in global mean sea level
as a result of an increase in the volume of water in the
world’s oceans.

5. SLR is an increase in the level of the world’s
oceans due to the effects of climate change,
especially global warming, induced by three
primary factors:
1. Thermal Expansion,
2.Melting Glaciers And
3.Loss of Greenland and
Antarctica’s ice sheets

6. Thermal Expansion:
When water heats up, it expands. About half of the sea-level
rise over the past 25 years is attributable to warmer oceans
simply occupying more space.

7. Melting Glaciers:
-Higher temperatures caused by global warming have
led to greater-than-average summer melting of large ice
formations like mountain glaciers as well as diminished
snowfall due to later winters and earlier springs.
-That creates an imbalance between runoff and ocean
evaporation, causing sea levels to rise.

8. Loss of Greenland and Antarctic Ice Sheets:
- As with mountain glaciers, increased heat is
causing the massive ice sheets that cover Greenland
and Antarctica to melt more quickly, and also move
more quickly into the sea

11. EFFECT OF SEA LEVEL RIS
- Beaches are eroded

12. - Dangerous Storm Surges:
Higher sea levels are coinciding with more
dangerous hurricanes and typhoons leading
to loss of life and property.

13. - Recently, a study has projected that sea
levels will rise around Lakshadweep Islands
due to the impact of global warming

14. -Flooding in coastal areas.

15. - Contamination of agricultural soil.

16. - Loss of mangroves & coral reefs

17. - Destruction of coastal biodiversity

18. - Salt water intrusion

19. Mitigation of sea level rise.
- Temporary installation of porous rock structures on the
shores, and construction of buildings on elevated land can
help minimize the damage caused by potential sea level rise
- The most important mitigation measures to reduce sea level
rise is reduction of Carbon dioxide emissions or even the
removal of Carbon dioxide in the atmosphere with biomass
based carbon capture and storage.

20. - Building sea wall.
- Relocation of coastal cities.
- Building tall walls and similar structures might
help reduce sea water intrusion up to a certain level,
but this solution is of no help when the sea level
rises drastically and even during tsunamis striking
the coastal regions.

21. -If global warming can somehow be decreased
substantially, then the sea level rise can also be
minimized and controlled.
-Constructing levees might help on a small scale, especially
if the particular coastal region experiences less increase in
ocean water over a longer period of time.

22. THANK YOU
By azad Kumar Sethy D.D.(auto) College Keonjhar,odisha, India