Show: OLLI 2019 Class 2 of 6, Climate Change in Earth History - a perspective on the future[4]

Liethold, Lonnie

Presented: NC State University
Raleigh, North Carolina, 2019/03/19

Abstract

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Description

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Note

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  1. Climate Change in Earth History - a perspective on the future
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  2. 137 years of data
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  3. The other CO2 problem - Ocean Acidification
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  4. Earth History
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  5. Climate has changed over the Earth's history
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  6. Climate in Earth History - Key Points
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  7. The Earth's history book
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  8. Ocean and lake sediment information
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  9. Climate Proxies - Rock Types
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  10. Glaciers and glacial deposits
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  11. Formation of Glaciers
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  12. How do we know about past glaciers?
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  13. Glacial tills and tillites
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  14. Glacial till in Minnesota, about 18,000 years old
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  15. Tillite, Till that has been lithified, turned to rock
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  16. More clues left behind by glaciers: Ice rafted debris - Dropstones
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  17. Ice-rafted debris -- dropstones
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  18. Climate Proxies -- Fossils
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  19. Evidence from fossil leaf shape
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  20. Evidence from fossil leaf shape 2
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  21. Evidence from fossil leaves and pollen
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  22. Climate Proxies - Chemical Clues
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  23. Climate Proxies - Chemical Clues Slide 2
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  24. Isotope Behavior
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  25. Foraminifera - forams
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  26. Climate signals from foraminifera shells in deep seq deposits - 18O/16O
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  27. Evidence from the chemistry of foraminifera shells
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  28. 18O/16O in forams from Cenozoic sediments past 65.5 million years
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  29. Data from three different time scales
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  30. Green House vs Ice House Climates - 100 million year cycles
    Sea level Change in meters
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  31. Greenhouse Earth
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  32. Icehouse Earth
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  33. Cenozoic Climate - The past 65.5 million years
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  34. Glacial-Interglacial Cycles of the past 1.8 million years
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  35. Glacial-Interglacial Cycles of the past 1.8 million years
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  36. Last Glacial Maximum
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  37. The current interglacial
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  38. The man-made super-interglacial
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  39. How does this compare to climate changes of the past Slide 1
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  40. How
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  41. How
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  42. How does this compare to climate changes of the past Slide 4
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  43. How does this compare to climate changes of the past Slide 5
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  44. The Paleocene-Eocene Thermal Maximum PETM
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  45. Volcanic Eruptions
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  46. Layered volcanic rocks in Eastern Greenland are up to 4000 meters thick
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  47. The Paleocene-Eocene Thermal Maximum PETM
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  48. The Paleocene-Eocene Thermal Maximum PETM Slide 2
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  49. Comparison of the PETM to the Anthropocene
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  50. Anthropogenic carbon release rate unprecedented during the past 66 million years
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  51. Climate of Earth History - key Points
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  52. Uncharted Territory Ahead
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1 Climate Change in Earth History - a perspective on the future Climate Change in Earth History - a perspective on the future 2 137 years of data 137 years of data
3 The other CO<sub>2</sub> problem - Ocean Acidification The other CO2 problem - Ocean Acidification 4 Earth History Earth History
5 Climate has changed over the Earth's history Climate has changed over the Earth's history 6 Climate in Earth History - Key Points Climate in Earth History - Key Points
7 The Eartth's history “book” The Earth's history "book" 8 Ocean and lake sediment information Ocean and lake sediment information
9 Climate Proxies - Rock Types Climate Proxies - Rock Types 10 Glaciers and glacial deposits Glaciers and glacial deposits
11 Formation of Glaciers Formation of Glaciers 12 How do we know about past glaciers? How do we know about past glaciers?
13 Glacial tills and tillites Glacial tills and tillites 14 Glacial till in Minnesota, about 18,000 years old Glacial till in Minnesota, about 18,000 years old
15 Tillite: Till that has been lithified, turned to rock Tillite = Till that has been “lithified”, turned to rock 16 More clues left behind by glaciers: Ice rafted debris - Dropstones More clues left behind by glaciers: Ice rafted debris - Dropstones
17 Ice-rafted debris - dropstones Ice-rafted debris -- dropstones 18 Climate Proxies - Fossils Climate Proxies -- Fossils
19 Evidence from fossil leaf shape Evidence from fossil leaf “shape” 20 Evidence from fossil leaf “shape” Evidence from fossil leaf “shape”
21 Evidence from fossil leaves and pollen Evidence from fossil leaves and pollen 22 Climate Proxies - Chemical Clues Climate Proxies - Chemical Clues
23 Climate Proxies - Chemical Clues Climate Proxies - Chemical Clues 24 Isotope Behavior Isotope “Behavior”
25 Foraminifera (forams) Foraminifera (“forams”) 26 Climate signals from foraminifera shells in deep seq deposits - <sup>18</sup>O/<sup>16</sup>O Climate signals from foraminifera shells in deep seq deposits - 18O/16O
27 Evidence from the chemistry of foraminifera shells Evidence from the chemistry of foraminifera shells 28 18 O 16 O in forams from Cenozoic sediments (past 65.5 million years) 18O/16O in forams from Cenozoic sediments (past 65.5 million years)
29 Data from three different time scales Data from three different time scales 30 Green House vs Ice House Climates - 100 million year cycles Green House vs Ice House Climates - 100 million year cycles
31 Greenhouse Earth Greenhouse Earth 32 Icehouse Earth Icehouse Earth
33 Cenozoic Climate - The past 65.5 million years Cenozoic Climate - The past 65.5 million years 34 Glacial-Interglacial Cycles of the past 1.8 million years Glacial-Interglacial Cycles of the past 1.8 million years
35 Glacial-Interglacial Cycles of the past 1.8 million years Glacial-Interglacial Cycles of the past 1.8 million years 36 Last Glacial Maximum Last Glacial Maximum
37 The current interglacial The current interglacial 38 The man-made super-interglacial The man-made super-interglacial
39 How does this compare to climate changes of the past? How does this compare to climate changes of the past? 40 How does this compare to climate changes of the past? How does this compare to climate changes of the past?
41 How does this compare to climate changes of the past? How does this compare to climate changes of the past? 42 How does this compare to climate changes of the past? How does this compare to climate changes of the past?
43 Do we have any analogues from Earth History? Do we have any analogues from Earth History? 44 The Paleocene-Eocene Thermal Maximum (PETM) The Paleocene-Eocene Thermal Maximum (PETM)
45 Volcanic Eruptions Volcanic Eruptions 46 Layered volcanic rocks in Eastern Greenland are up to 4000 meters thick Layered volcanic rocks in Eastern Greenland are up to 4000 meters thick
47 The Paleocene-Eocene Thermal Maximum (PETM) The Paleocene-Eocene Thermal Maximum (PETM) 48 The Paleocene-Eocene Thermal Maximum (PETM) The Paleocene-Eocene Thermal Maximum (PETM)
49 Comparison of the PETM to the Anthropocene Comparison of the PETM to the Anthropocene 50 Anthropogenic carbon release rate unprecedented during the past 66 million years Anthropogenic carbon release rate unprecedented during the past 66 million years
51 Climate of Earth History - key Points Climate of Earth History - key Points 52 Uncharted Territory Ahead Uncharted Territory Ahead