Outline
1. Definition of Climate Change
2. Opinions on Climate Change
3. Parameters to Measure Climate
Change
4. Conclusion
5. Suggestions
Definition
A change which is
attributed directly or
indirectly to human
activity that alters
the composition of
the global
atmosphere and
which is in addition
to natural climate
variability observed
over comparative
time periods.
1914 (Alaska) 2004 (Alaska)
Ice shrinkage Drought in Africa
Flood
Philip Stott, Emeritus Professor of Biogeography at the School of Oriental and African Studies in London says climate change is too complicated to be caused by just one factor, whether CO2 or clouds
Opinions on Climate Change
Parameters to Measure Climate Change
• Temperature
• Precipitation
• Sea level
• Solar activity
• Volcanic Eruption
• Chemical Composition
TemperatureChronology of global temperature profile
Since ice-age naturally being warmer. Small
fluctuation is caused by solar radiance variation
After industrial revolution (1800s) a
sharp increase occur.
Temperature increase linear with CO2
emission trend.
Source: NASA
• Precipitation: shows relative climate variation from
water balance.
Data source: NOAA, 2015
On average, total annual precipitation has increased over landareas in the United States and worldwide. Since 1901, globalprecipitation has increased at an average rate of 0.09 inches perdecade, while precipitation in the contiguous 48 states hasincreased at a rate of 0.15 inches per decade.
Volcanic Eruptions
volcanic eruptions only has small
effect on global temperature increase
CO2 from volcanic activity= 110 milion
tonne/year but from human activity is
10,000x higher.
(scientificamerican.com)
Chemical composition of air/ water
Changed slowly after the end
of the last Ice Age, but began
to increase rapidly since
industrial evolution.
CO2 emit from
nature is always
in balance
From human
activity it cannot
be absorbed by
earth and ocean
Conclusion
• Natural cycle only contribute a small
effect on climate change, the most
dominant effect is coming from
human activity
Simple Things To Do
Turn off your computer or the TV
when you’re not using it.
Take shorter showers. Heating water uses energy.
Keep rooms cool by closing the blinds, shades, or
curtains.
Turn off the lights when you leave a room.
Use energy saving lamps.
Simple Things To Do
Dress lightly when it’s hot instead of turning up
the air conditioning. Or use a fan.
Dress warmly when it’s cold instead of turning
up the heat.
Keep the air filters on your AC and furnace clean.
Walk short distances instead of asking for a
ride in the car.
Plant a tree.
Recycle.