climate change power point

Topics: Greenhouse gas, Carbon dioxide, Earth Pages: 11 (1017 words) Published: June 24, 2015
First of all, you should
know that weather and
climate
are not the same thing.

WEATHER IS:
• Short term
• Limited area
• Can change
rapidly
• Difficult to predict
WEATHER is what’s
happening outside
your window right
now.

CLIMATE is the
average of many
years of weather
observation.

CLIMATE IS:
• Long term
• Wide area
• Seasonal
changes
• Measured over
long spans of
time

Climate is affected by many
factors
ABIOTIC FACTORS:

BIOTIC FACTORS:

Latitude

Transpiration

Altitude

Respiration

Ocean Currents

Photosynthesis

Topography

Decomposition

Solar Radiation

Digestion

Evaporation
Orbital Variations
Volcanic Activity

Greenhouse Gases are essential to our
climate

http://www.larryjzimmerman.com/wproblems/warming/greenhouse.gif

Planets with very little
greenhouse effect are either
very cold…
Pluto’s average temperature is –370° F

http://www.windows.ucar.edu/tour/link=/pluto/statistics.html

…or they have huge
temperature swings from day
to night.
On Mars, there is about a 300 degree F difference between
high and low temperatures

(http://quest.nasa.gov/aero/planetary/mars.ht
ml )

Planets with abundant
greenhouse gases are very
hot

The average temperature on Venus is about 855° F!
http://www.windows.ucar.edu/tour/link=/venus/statistics.html

…and then there’s Earth….

…which is just right…
…for the moment, anyway.

A number of greenhouse
gases occur naturally in the
Earth’s atmosphere
•Water vapor
•Carbon dioxide
•Methane
•Nitrous oxide

With no greenhouse gases at all in its
atmosphere, scientists estimate that
Earth’s average atmospheric temperature
would be about -18° C, or about 0°F
http://plaza.ufl.edu/knhuang/project2/cause.html

The greenhouse gas
content of the
atmosphere is being
altered by human activity.
The result of this change
is global warming.

Evidence of Climate
Change comes from
many different sources.

Glaciers are melting
away worldwide
Agassiz Glacier,
Montana, in
1913…
…and in 2005

Pasterze
Glacier,
Austria, in
1875…
…and in 2004

Ice cores yield information and
actual samples of Earth’s past
atmosphere

www.daviesand.com/

Tree ring data show a
warming trend

www.accesstoenergy.com

Animal and plant life is
changing

2/3 of European
butterfly species
studied have shifted
their ranges northward
by as much as 150
miles. (Parmesan, 1996;
Parmesan et al., 1999)

An analysis of the
distributions of
British birds found
that many species
have moved north
by an average of
18.9 km. (Thomas et
al, 1999)

At Boston's Arnold
Arboretum, plants are
flowering eight days
earlier on average than
they did from 1900 to
1920. (Primack et al,2004)

Climate change seems to
accelerating

Each of the 48 continental states experienced abovenormal annual temperatures in 2006. For the majority of states, 2006 ranked among the 10 hottest years since

More Greenhouse Gases Mean a
Warmer Earth

 

                                                                                                   

www.stuffintheair.com/global-energy-balance.html

Who creates greenhouse gases?

Carbon Dioxide
In the distant past, the
Earth was much
warmer. High levels of
Carbon Dioxide in the
atmosphere fueled
lush growth, some of
which was stored in
the form of fossil fuels.

Carbon Dioxide in Earth’s
atmosphere has risen by
about 30% since the
beginning of the
industrial revolution.
Most of the increase is
due to the combustion of
fossil fuels, which
releases the long-stored
CO2 back into the
atmosphere.
www.epa.gov/climatecha
nge

Methane
Methane is released by
coal mining, landfills, and
by agriculture,
particularly through the
digestive processes of
beef and milk cows.

www.epa.gov/climatecha
nge

Nitrous Oxide
Nitrous Oxide is
produced by cars, by
fossil fuels used for
heat and electricity,...
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