Extra Credit Assignment
Instruction: Please listen to a 45-minute-long BBC podcast “In Our Time” on the topic of the Paleocene-Eocene Thermal Maximum (https://www.bbc.co.uk/sounds/play/b08hpmmf) and answer the following questions. The questions are organized in the order of mention in the program. You can type your answers directly in this document (please use red font). Once finished, please submit it on Blackboard. I hope you will enjoy!
(1) How much warmer was it during the Paleocene-Eocene Thermal Maximum (PETM for short)?
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(2) How many years after the extinction of the dinosaurs did the PETM take place?
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(3) What findings led to the discovery of the PETM?
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(4) What animal group was most affected by the PETM and why?
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(5) One of the scientists talks about the Arctic Basin. Why did it make a difference?
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(6) Where was the deep ocean current generated at the time of the PETM?
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(7) Why is the way the ocean currents move important?
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(8) What happened when the Drake Passage was opened?
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(9) What is the main evidence for the warming during the PETM?
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(10) What do we learn from the fossil shells on the sea floor?
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(11) What was the average global temperature during the PETM?
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(12) What animals used to live in Arctic during the PETM?
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(13) Where would you find the most continuous geological record?
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(14) What do scientists think caused the warming during the PETM?
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(15) Where did the excess carbon come from?
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(16) Beside from carbon dioxide, what is the other gas that was important?
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(17) How are fossil plants used to reconstruct the temperature in the past?
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(18) How was the carbon dioxide injected into the atmosphere removed on both short and long timescales?
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(19) In the geologist record, is it common to have ice at both poles as in the modern times?
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