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What is global warming
Evidence of global warming
Cause of global warming
Greenhouse effect
Consequences
Solutions
What is global warming?
• Global warming is the increase in the average
temperatureof Earth's near-surface air and
oceans since the mid-20th century and its
projected continuation. According to the 2007
Fourth Assessment Report by the
Intergovernmental Panel on Climate
Change(IPCC), global surface temperature
increased by 0.74 ± 0.18 °C(1.33 ± 0.32 °F)
during the 20th century.
Evidence of global warming
• Graph of Historical Trend of Warming
Temperatures
• Carbon Dioxide Increasing in Atmosphere
• Methane Also Increasing
• More Frequent Extreme Weather
• Disappearing Glaciers
• Melting Arctic Sea Ice
• Melting Antarctic Sea Ice
• Greenland's Ice Sheet Melting
• Tropical Diseases Spreading
• Oceans Warming With Coral Bleaching &
Disintegration
Carbon Dioxide Increasing in
Atmosphere
• The atmospheric levels of the greenhouse gas
carbon dioxide, have increased since preindustrial times from 280 part per million
(ppm) to 377.5 ppm (2004 Carbon Dioxide
Information Analysis Center), a 34% increase.
Methane Also Increasing
• Levels of atmospheric methane, a powerful
greenhouse gas, have risen 145% in the last
100 years. Methane is derived from sources
such as rice paddies, bovine flatulence,
bacteria in bogs and fossil fuel production.
More Frequent Extreme Weather
• "The potential for floods and droughts is
increasing."....... the heating from increased
greenhouse gases enhances the hydrological
cycle and increases the risk for stronger, longerlasting or more intense droughts, and heavier
rainfall events and flooding, even if these
phenomena occur for natural reasons. Evidence,
although circumstantial, is widespread across the
United States. says Dr. Kevin Trenberth of the
National Oceanic and Atmospheric
Administration (NOAA).
Disappearing Glaciers
• Disappearing Glaciers Ice is melting all over the planet. Glaciers are
melting on six continents.
• If present warming trends continue, all glaciers in Glacier National Park
could be gone by 2030. The park's Grinnell Glacier is already 90% gone.
• Because of global warming, the glaciers of the Ruwenzori range in
Uganda are in massive retreat.
• The Bering Glacier, North America's largest glacier, has lost 7 miles of
its length, while losing 20-25% of parts of the glacier.
• Ice cores taken from the Dunde Ice Cap in the Qilian Mountains on the
northeastern margin of the Qinghai-Tibetan Plateau indicate that the
years since 1938 have been the warmest in the last 12,000 years.
• The melting is accelerating. The Lewis Glacier on Mt. Kenya (In Kenya)
has lost 40% of its mass during the period 1963-1987 or at a much
faster clip than during 1899-1963.
Melting Arctic and Antarctic Sea Ice
• The Arctic, with an area about the size of the
United States, is seeing average temperatures
similar to the Antarctic, almost 5 degrees
Fahrenheit warmer than the planet as a whole
Arctic sea ice has shrunk by 250 million acres - an area the size of California, Maryland and
Texas combined.
Greenland's Ice Sheet Melting
• In a recent study by researchers from NASA's Goddard
Space Flight Center shows that Greenland's ice sheet,
about 8% of the Earth's grounded ice (Antarctica
possessing 91% of land ice), is losing ice mass. A NASA
high-tech aerial survey shows that more than 11 cubic
miles of ice is melting along Greenland's coasts yearly,
accounting for 7% of the annual global sea level rise.
Measurements over the last century suggest that sea
level has risen 9 inches, enough to cause flooding in
low-lying areas, when a storm occurs. Sea level
increase could worsen, if the present trend continues,
says William Krabill, lead author of the NASA study
Tropical Diseases Spreading
• A recent study by New Zealand doctors,
researchers at the Wellington School of
Medicine's public health department said
outbreaks o f dengue fever in South Pacific
islands are directly related to global warming.
Global warming is projected to significantly
increase the range conducive to the
transmission of both dengue and yellow
fevers.
Cause of global warming
• The temperature is increased because by
increasing concentrations of greenhouse gases,
which result from human activities such as the
burning of fossil fuel and deforestation.
• Global dimming, a reduction of sunlight
reaching the surface as a result of increasing
atmospheric concentrations of human-made
particulates, has partially countered the
effects of warming induced by greenhouse
gases.
Greenhouse effect
• The greenhouse effect is the process by which
absorption and emission of infrared radiation
by gases in the atmosphere warm a planet's
lower atmosphere and surface.
• CO2 is the principal greenhouse gas in terms
of the greenhouse effect.
• Currently in the world 40% of all CO2
emissions are caused by power plants. These
are burning coal, natural gas and diesel fuel.
Consequences
• Global Warming effects
• global warming is going to have some effect
on Earth. Here are the 5 deadliest effects of
global warming.
1. Spread of disease
• As northern countries warm, disease carrying
insects migrate north, bringing plague and
disease with them. Indeed some scientists
believe that in some countries, thanks to
global warming, malaria has not been fully
eradicated.
2. Warmer waters and more
hurricanes
• As the temperature of oceans rises,
so will the probability of more
frequent and stronger hurricanes.
We saw in this in 2004 and 2005.
3. Increased probability and intensity
of droughts and heat waves
• Although some areas of Earth will become
wetter due to global warming, other areas will
suffer serious droughts and heat waves. Africa
will receive the worst of it, with more severe
droughts also expected in Europe. Water is
already a dangerously rare commodity in
Africa, and according to the
Intergovernmental Panel on Climate Change,
global warming will exacerbate the conditions
and could lead to conflicts and war.
4. 4.Economic consequences
• Most of the effects of anthropogenic global
warming won’t be good. And these effects
spell one thing for the countries of the world:
economic consequences. Hurricanes cause
billions of dollars in damage, diseases cost
money to treat and control and conflicts
exacerbate all of these.
5.Destructive storms
• With ocean temperature being a key factor for
hurricane formation, the consequences of global
warming will inevitably include the increased
generation of storms and hurricanes with greater
power and frequency.
• The destructive power of hurricanes has increased by
some 50% in the last 30 years, a figure that is closely
connected with the rising temperature of the ocean.
Warmer water leads to greater evaporation, which in
turn helps to not just ‘prime’ the coalescence of
hurricanes and cyclones but also to maintain their
vigour once extant.
• Simply put, warmer oceans make for more extreme
weather including devastating storms.
Solutions
• Who can reduce global warming emissions?
We can—together. Our individual efforts are
important, but the biggest impact on climate
change will come from large-scale changes—
well-reasoned international policies;
thoughtful, systematic efforts to reduce
polluting fossil fuel energy sources and
unsound land use practices; and steady
progress toward a green, sustainable future.
Solutions
• The solutions of Global warming,
1, To restrict the cars emission level, that is what
europe doing.
2, Use any other energy besides coal burning method,
in order to reduce the CO2 emission.
3, Plant more plant, due to plant can absorb CO2 and
release O2 during daytime.
4, Stop the deforestation.
5. Increasing energy efficiency
Solutions
6.Modifying the CO2 balance as a result of geo
or planetary engineering
7.Climate engineering proposals involving the
reflection of incoming solar radiation
8.Climate engineering proposals involving
removal of CO2 from the air by enhancing
natural sinks
Summary
• What can we do for it?you may think the
power you have is too tiny to change.However
,it can be enlarged if anyone do it.That very
simple doing them in our daily life, etc taking
public transport if time is allowed , avoiding
overuse of air-conditioner Can you do,You are
recommended to do more in other way .
• All at all, it is amendable or not is depend on
what the man do.It is nothing if everyone in
this world ignore it.
The end