Presentation on theme: "Increase Your Albedo! Exploring the Fate of Arctic Sea Ice."— Presentation transcript:
Increase Your Albedo! Exploring the Fate of Arctic Sea Ice
What is Albedo? Albedo is the fraction of solar radiation incident on a surface that is reflected. In plain terms, albedo is the ability of a surface to reflect the suns radiation. Your white t-shirt has a higher albedo than your darker ones… thats why it keeps you cool in the summer!
Pop Quiz! Guess which terrestrial surface type has the most albedo… (reflects more sunlight than it absorbs). Albedo is expressed as a percentage of reflected radiation (0.1 or 10%)
Whats Going On? The United Nations Intergovernmental Panel on Climate Change (IPCC) has made some startling observations: Arctic sea-ice extent has decreased by 3% per decade between Summer sea-ice extent has shrunk by 20% (880,000 sq. km) in the Atlantic part of the Arctic Ocean Arctic air temperature has risen by as much as 5˚C during the 20 th century with the last decade being the warmest There is consistent evidence of later Fall freeze-up and earlier Spring breakup
Whats CASES? The Canadian Arctic Shelf Exchange Study A Canadian-led international research network made up more than 70 researchers from Canada and 9 other countries Goal: Understand and model the response of biogeochemical and ecological cycles to atmospheric, oceanic and continental forcing of sea-ice cover variability on the Mackenzie Shelf In simpler terms: Study the effects of changing sea-ice cover on the Arctic environment!
The Amundsen Inauguration: August 26, 2003 in Québec City Named after Norwegian explorer Roald Amundsen: 1 st to navigate Northwest Passage from and to reach the South Pole in 1911 Only Canadian ship to have full-time dual role of icebreaking and scientific research
Large-scale density-driven circulation in the oceans, driven by differences in temperature and salinity. Cold salty water sinks and warmer water rises.
Oslo to Tokyo Total travel distance for a one-way trip from Norway to Japan: Via Panama Canal: km Via Cape Horn: km Via Suez Canal (Asian Route): km Via Northwest Passage: km
Activity We will be drawing the most efficient (and realistic) route between the southern tip of Greenland to the Bering Strait! 1.Groups of 4 (or more). 2.You will need: String, Adhesive, Ruler. 3.Try to draw your own way across the Northwest Passage by navigating the shortest distance. 4.Good Luck!