sp00u1le4 - CORAL REEFS Unit 1 Lesson 4: Coral Reefs as...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
SPRING 2000 30 CORAL REEFS Unit 1 Lesson 4: Coral Reefs as Indicators of Paleoclimate esson Objectives: Students will gain knowledge of how the marine environment can tell a story about years past through naturally recorded geographic and environmental phenomenon. Vocabulary: Paleoclimate, greenhouse effect, proxy data information gathered from www.noaa.gov Paleoclimatology is the study of the weather and climate from ages past. The word is derived from the Greek root word " paleo -," which means "long ago" with combined with " climate ," meaning weather. Scientists and meteorologists have been using instruments to measure climate and weather for only the past 140 years! How do they determine what the Earth's climate was like before then? They use historical evidence called proxy data . Examples of proxy data include tree rings, old farmer’s diaries, ice cores, frozen pollen and ocean sediments. Scientists know the Earth's average temperature has increased approximately 1°F since 1860. Is this warming due to something people are releasing into the atmosphere or natural causes? Many people today are quick to blame the greenhouse effect for global warming, but the temperature increases may have a natural cause, for example, from elevated volcanic activity. Gases in the earth’s atmosphere which trap heat, and cause an increase in temperature cause the greenhouse effect. Carbon dioxide (CO 2 ), water vapor, and other gases in the atmosphere absorb the infrared rays forming a kind of blanket around the earth. Scientists fear that if humans continue to place too much carbon dioxide in the atmosphere, too much heat will be trapped, causing the global temperature to rise and resulting in devastating effects. Some scientists speculate that natural events like volcanic eruptions or an increase in the sun's output, may be influencing the climate. Perhaps the temperature rise is
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/31/2011 for the course OCB 6050 taught by Professor Staff during the Spring '11 term at University of South Florida - Tampa.

Page1 / 5

sp00u1le4 - CORAL REEFS Unit 1 Lesson 4: Coral Reefs as...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online