Ice Cores

The video above shows the National Ice Core Lab located in Colorado, where ice cores are stored and studied. 

Tree Rings Proxy

Source:http://www.sciencemuseum.org.uk/ClimateChanging/ClimateScienceInfoZone/Exploringwhatmighthappen/2point1/~/media/ClimateChanging/FindOutMore/Images/twoonethreethree_TreeRing2.ashx

Tree Rings are also a common proxy that are used to help learn more about climate change. The width of each ring can help give information about precipitation or other stress that effect the tree during that one year of growth. The link below provides more information about how tree rings help determine information about previous climates. 

Tree Rings

Ice Core Proxy

Source:http://epo.sonoma.edu/EposChronicles/wp-content/uploads/2011/02/ice_core.jpg

Ice cores are a way that scientists are able to tell about past climates on Earth. Within each core that is taken, layers from each previous year created from layers of snow accumulation can be studied to see what was happening on the Earth. As shown in the image above, the air bubbles that are trapped can be studied to learn about different aspects of the climate. The link below provides more information about ice cores and how they are used as a proxy for the climate. 

Ice Core Proxy

Global Warming worries Californians

An interesting poll completed in California comparing current feeling about global warming to a poll completed in previous years asking the same questions. The link to the full article out of the San Francisco Times that goes with the field poll is provided below.

Global Warming worries Californians

The Antarctic Ozone Hole

This video provides some information about the issues that surround the Ozone hole in the Antarctic. It explains how the hole was created and how humans have had an effect on what is happening with the Ozone. 

Montreal Protocol

The Montreal Protocol: A Success? 

The Montreal Protocol was a major piece of global environmental legislation. It's main purpose was to phase out the use of ozone depleting substances, such as chlorofluorocarbons. Since its implementation problems surrounding the ozone have turned around. 

This website provides you with an evaluation of Protocol and all that has happened surrounding the legistaltion since it was created. 

The Montreal Protocol on Substances that Deplete the Ozone Layer

This link provides you with a varity of graphs, like the one shown below, that show levels of differnt ozone deleting substances before the protocol and what the future may look like.  

Montreal Protocol on substances that deplete the ozone layer - graphs

Source: http://www.environment.gov.au/atmosphere/ozone/legislation/montp-graphs.html

Good and Bad Ozone

Good vs. Bad Ozone

When dealing with the Ozone there are two different types. The'good'ozone and the 'bad' ozone. The 'good' ozone allows humans to live on the Earth, while the 'bad' ozone is created by humans and harming both human life and the Earth. These websites compares the two types of ozone and explains how the effect human life.

 Good vs. Bad Ozone

Good Up High Bad Nearby - What is ozone?

Source: http://airnow.gov/index.cfm?action=goodup.page1