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Ice Core Science
Ice cores like this one can be analyzed for their chemical composition, and can
reveal information about past climates and major weather events such as El
Niño. What element or compound do you think is studied to determine past
temperatures?
Back Photo: National Ice Core Laboratory, United States Geological Service, National Science Foundation, University of New Hampshire. Anatomy of El Niño | Chasing El Niño | El Niño's Reach Dispatches | Resources | Mail | Site Map | El Niño Home Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print PBS Online | NOVA Online | WGBH © | Updated November 2000 |