Climate and Global Warming
Dr. Art DeGaetano
Due Monday February 29, 2016
Climate change in likely to be one of the key issues that the next U.S. President will
need to address.
Frozen sea wateroften snow covered. Highly reflective.
Ice NOT attached to land. Does NOT increase sea level if it melts!
Steady decline in arctic sea ice extent through time. part natural part
Sea ice extent has seasonal cycle, lowe
CO2 ice age relationships
Prior to 2.75 MYR d18O relatively negative < 3.5%o No ice debris
Either No glaciers or small glaciers that did not send ice to ocean
First debris about 2.75 MYA
Debris accumulate when d18O is positive near 41,000 year tilt cycle.
Take Home Assignment
Due WEDNESDAY April 15, 2015
1) Develop a 5 slide PowerPoint presentation on the topic assigned to the
beginning letter of your last name
A-C Recent Trends in Greenhouse Gases including sources and sinks
D-F Global Warming Pote
Ice accumulation on land also traps air bubbles. Snapshot of atmospheric gas
Drill ice cores in high domes of snow in Antarctica and Greenland.
Domes less prone to flow. Layers are just compressed. Deep ice flows away from