1. prap. Vítězslav Hlobil 21-2LES
The Environment
Topic:
Global warming
prap. Vítězslav Hlobil
21-2LES
University of Defence
2010

2. Main points “Watching with understanding” What is Global Warming (GW)?
Reasons for GW
Consequences of GW
“Watching with understanding”
GW in numbers

3. What is Global Warning?
GW as the increase in the average temperature of Earth's near-surface air and oceans since the mid-20th century and its projected continuation.
Global surface temperature increased by 0.74 ± 0.18 °C throughout the 20th century!

4. Reasons for Global Warming
Natural changes
- solar radiation
- lay out of lands and oceans
- volcanic activity
- ocean circulation
- condition and envelopment of biosphere
Anthropogenic changes
- burning fossil fuels (rock oil, coal, natural gas)
- activity releasing into atmosphere so-called greenhouse gasses (carbon oxide-CO2, methane, freons …)
- carbon oxide emissions

6. Reasons for Global Warming - The Greenhouse Effect
The real greenhouse:

7. Consequences of Global Warming
Melting of glaciers
Increasing sea level
Extreme atmospheric events
Changing direction or stop of sea currents
Less fresh water
Negative effect on agriculture and fishing
Lack of food
Expansion of diseases and vermin
Risk to fauna and flora
“El Niňo”

8. Iceberg melting Satellite photos show long term decrease of arctic ice
(1979 and 2003).

10. Increasing sea level

11. Extreme atmospheric events
Increasing number and intensity of:
- floods
- storms
- tornados
- hurricanes etc.

12. Changing direction or stop of sea currents
Oceanic circulation has a huge effect on the climate everywhere around the world
If the oceans got significantly warmer, it would be able to change the direction of currents
Climate in Europe is influenced to a great extent by the warm Gulf Stream
Average temperature could decrease of about °C in Europe, without huge warm, which is supplied by warm ocean currents

13. Expansion of diseases and vermin
Expansion of diseases from warmer region
Dengue fever or malaria could expand from Africa to Europe
Double even triple the number of deaths caused by hot weather
Dangerous is also the growing population of termites

14. Stronger phenomenon “El Niňo”
Moving of warm water from west equatorial Pacific as far as sea coast of South America
Strong rains and subsequent floods, soil erosion and coat of warm water chase out and deprive fishermen of living
On the other side of Pacific ocean the El Niňo causes long drought
We have vivid memories on this event from years

15. Watching with understanding
Watch the video of the global warming and answer these questions:
1) According to the scientists what was the warmest year in the history?
2) What do researchers predict about temperature?
3) What changes could help reduce global warming?

16. Global warming in numbers
Share of CO2 on GW is 72% (existence of water vapour is neglected)
Share of H2O in the atmosphere on GW is 95%
Independent human activity contributes to warming by 0.28%, the figure is progressively increasing
Number of recorded natural disasters in the period 1990 to 2001 based on international database

17. What do you think? Are there more „pros“?? (which)

18. Thank you for your attention…
…questions?