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GLOBAL WARMING

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Methane is 23 times more powerful by weight in warming the atmosphere than is carbon dioxide ... SUN'S WARMING IS PROBABLY INSIGNIFICANT ... – PowerPoint PPT presentation

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Title: GLOBAL WARMING


1
GLOBAL WARMING
  • BASIC INFORMATION ON A GLOBAL ISSUE

2
Carbon Dioxide Increase Over Time
  • 1000 AD --- 180 ppm
  • 1800 AD --- 280 ppm
  • 2010 AD --- 390 ppm
  • 2050 AD --- 450 ppm
  • 2100 AD --- 550 ppm

3
Highest CO2 Levels In History
  • Carbon dioxide levels are now higher on the
    planet Earth than they have been for the past
    650,000 years.
  • Human civilization has been in existence for
    about 12,000 years.

4
CO2 Rate of Increase
  • Carbon Dioxide is increasing at the rate of 2.5
    parts per million each year at this rate carbon
    dioxide levels will exceed 400 parts per million
    by the year 2014. This is a level not seen by
    the Earth for several hundred thousand years.

5
OCEAN LEVEL RISE
  • The ocean is presently rising at the rate of one
    centimeter every five years. At the present
    rate, the ocean will rise about 19 centimeters
    between now and the year 2100.

6
GLOBAL TEMPERATURE RISE
  • Over the past 140 years, average global
    temperatures have risen 0.6 degrees Celsius or
    1.1 degrees Fahrenheit.

7
RATE OF TEMPERATURE INCREASE
  • The global temperature is presently increasing at
    the rate of 0.2 degrees Celsius per decade.

8
CRITICAL CONCENTRATION OF CARBON DIOXIDE
  • Scientists believe that a concentration greater
    than 450 ppm of carbon dioxide in the Earths
    atmosphere will lead to a runaway greenhouse
    effect with catastrophic consequences for life on
    Earth.

9
CO2 PRODUCERS
  • Only one percent of the worlds countries (which
    is two countries) are producing 55 of the
    worlds carbon dioxide emissions. What are those
    two countries?

10
THATS RIGHT
  • The United States and China, in fact, China has
    just surpassed the United States as the worlds
    greatest emitter of carbon dioxide. China is
    presently bringing coal-fired power-plants on
    line at the rate of one or two a week.

11
THE 20TH CENTURY
  • The 20th Century was the warmest century in the
    past 1000 years.

12
GLOBAL WARMING GASES
  • Carbon Dioxide
  • Methane
  • Nitrous Oxide
  • Chlorofluorocarbons
  • Water Vapor

13
Watch Out For These Two
  • Methane is 23 times more powerful by weight in
    warming the atmosphere than is carbon dioxide
  • Nitrous Oxide is 310 times more powerful than
    carbon dioxide in warming the planet

14
WARMEST YEARS ON RECORD
  • 11 of the 12 hotest years on record have occurred
    in the last twelve years.

15
OCEAN WARMING
  • The Earths ocean has warmed 0.5 to 1.0 degrees
    Fahrenheit since 1906.

16
SOURCE OF CO2
  • Two-thirds of the carbon dioxide entering the
    Earths atmosphere comes from natural sources
    such as animal respiration and volcanoes, while
    one-third is anthropogenically caused.

17
AFRICAN GLACIERS
  • Glaciers in East Africa, including those on Mount
    Kilimanjaro, have been receding since 1880.

18
SUNS WARMING IS PROBABLY INSIGNIFICANT
  • Over the past 50 years, the troposphere (layer of
    atmosphere next to Earths surface) has been
    steadily warming while the stratosphere has been
    steadily cooling. This is the opposite of what
    would be expected if the sun were having a
    pronounced effect on Earths warming.

19
SCIENTISTS EXPOUND
  • Recently, 600 scientists from 40 countries said
    with 90 certainty, that the Earths present
    global warming is being primarily caused by human
    activity.

20
DIFFICULT TO MODEL
  • The Earths atmosphere and climate are embedded
    with a high degree of randomness and uncertainty,
    making it difficult to differentiate between
    normal events and abnormal trends. Cloud
    formation and behavior, for example, is extremely
    difficult to model.

21
AND SO THE SAGA CONTINUES
  • No one knows what is going to happen to this
    spherical petri dish with the microbe, Homo
    sapiens, living upon it. Will the microbe upset
    its living environment and exterminate itself, or
    will it manage to survive. Stay tuned for the
    greatest adventure of all time Will the human
    race save itself from itself?
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