1. By: Jose Angelo M. Apdian Grade 8 – Nelson Mandela
Climate Change
By:
Jose Angelo M. Apdian
Grade 8 – Nelson Mandela

2. Introduction to Climate Change
a change in global or regional climate patterns,
increases carbon dioxide (CO2)
en.wikipedia.org
americablog.com

3. Has the world’s climate been constant?
Yes
Climate's changed before
Climate is always changing.
We have had ice ages and warmer periods when alligators were found in Spitsbergen.
700 thousand years ago
i2.wp.com

4. The Milankovitch Cycle
Changes in the Earth's orbit brought about by astronomical variations have a strong impact on Earth’s climate.
They serve as the pacemaker for the glacial-interglacial cycles over the Quaternary 
ossfoundation.us/
skepticalscience.com

5. Glacial – Interglacial cycle
geo.arizona.edu

6. Glacial – Interglacial cycle
Glacial period is an interval of time within an ice age that is marked by colder temperatures and glacier advances.
Interglacial period is a geological interval of warmer global average temperature lasting thousands of years that separates consecutive glacial periods.

7. Climate – Feedback Mechanism
Positive feedback amplifies the change in the first quantity
Negative feedback reduces it. 
nasa.gov

8. Positive – feedback Mechanisms
Warmer surface temperature
Increased rates of evaporation
Increase atmospheric pressure
Water Vapor concentration
Is a greenhouse gas
Melting ice pack
Decreases the ability of Earth’s surface to reflect incoming solar radiation

9. Negative – feedback mechanisms
Higher temperature
Increases the ability of atmosphere to reflect the incoming solar radiation
Effects
Rivers drying up
Lands drying up
People are having diseases
songwriterstipjar.files.wordpress.com

10. The Mauna Loa Curve Since 1958,
the concentration of carbon dioxide (CO2) in the atmosphere 
has been measured daily at Mauna Loa Observatory, Hawaii
eoearth.org

11. The Mauna Loa Curve
upload.wikimedia.org

12. Changes in the Arctic For nearly 30 years,
Arctic sea ice extent and thickness have fall dramatically
Arctic Sea Ice
A sensitive climate indicator
Life span

13. Increasing instances of severe weather
Extreme heatwaves and heavy rain storms are already happening with increasing regularity worldwide because of manmade climate change, according to new research.
spc.noaa.gov

14. Changes in precipitation levels
According to the Intergovernmental Panel on Climate Change (IPCC)
increasing average global temperatures will result in a number of impacts to the hydrological cycle, including changes in precipitation.
media-1.web.britannica.com/
theclimatechangeclearinghouse.org

15. THANK YOU FOR LISTENING

16. References
Earth Science, 13th edition by Trabuck et al., 2012 (pp )
Climate by Zack Guido (
Climate Change: How do We Know? by Holly Shaftel (
Causes of Climate Change (
Canada’s Action on Climate Change (
spc.noaa.gov
media-1.web.britannica.com/
theclimatechangeclearinghouse.org
upload.wikimedia.org
eoearth.org
i2.wp.com
americablog.com
en.wikipedia.org