Show: Climate Change in Earth History - a perspective on the future[4]
Presented: NC State University
Raleigh, North Carolina, 2019/03/19
| 1 |  | Climate Change in Earth History - a perspective on the future | 2 |  | 137 years of data |
| 3 |  | The other CO2 problem - Ocean Acidification | 4 |  | Earth History |
| 5 |  | Climate has changed over the Earth's history | 6 |  | Climate in Earth History - Key Points |
| 7 |  | The Eartth's history “book” | 8 |  | Ocean and lake sediment information |
| 9 |  | Climate Proxies - Rock Types | 10 |  | Glaciers and glacial deposits |
| 11 |  | Formation of Glaciers | 12 |  | How do we know about past glaciers? |
| 13 |  | Glacial tills and tillites | 14 |  | Glacial till in Minnesota, about 18,000 years old |
| 15 |  | Tillite = Till that has been “lithified”, turned to rock | 16 |  | More clues left behind by glaciers: Ice rafted debris - Dropstones |
| 17 |  | Ice-rafted debris -- dropstones | 18 |  | Climate Proxies -- Fossils |
| 19 |  | Evidence from fossil leaf “shape” | 20 |  | Evidence from fossil leaf “shape” |
| 21 |  | Evidence from fossil leaves and pollen | 22 |  | Climate Proxies - Chemical Clues |
| 23 |  | Climate Proxies - Chemical Clues | 24 |  | Isotope “Behavior” |
| 25 |  | Foraminifera (“forams”) | 26 |  | Climate signals from foraminifera shells in deep seq deposits - 18O/16O |
| 27 |  | Evidence from the chemistry of foraminifera shells | 28 |  | 18O/16O in forams from Cenozoic sediments (past 65.5 million years) |
| 29 |  | Data from three different time scales | 30 |  | Green House vs Ice House Climates - 100 million year cycles |
| 31 |  | Greenhouse Earth | 32 |  | Icehouse Earth |
| 33 |  | Cenozoic Climate - The past 65.5 million years | 34 |  | Glacial-Interglacial Cycles of the past 1.8 million years |
| 35 |  | Glacial-Interglacial Cycles of the past 1.8 million years | 36 |  | Last Glacial Maximum |
| 37 |  | The current interglacial | 38 |  | The man-made super-interglacial |
| 39 |  | How does this compare to climate changes of the past? | 40 |  | How does this compare to climate changes of the past? |
| 41 |  | How does this compare to climate changes of the past? | 42 |  | How does this compare to climate changes of the past? |
| 43 |  | Do we have any analogues from Earth History? | 44 |  | The Paleocene-Eocene Thermal Maximum (PETM) |
| 45 |  | Volcanic Eruptions | 46 |  | Layered volcanic rocks in Eastern Greenland are up to 4000 meters thick |
| 47 |  | The Paleocene-Eocene Thermal Maximum (PETM) | 48 |  | The Paleocene-Eocene Thermal Maximum (PETM) |
| 49 |  | Comparison of the PETM to the Anthropocene | 50 |  | Anthropogenic carbon release rate unprecedented during the past 66 million years |
| 51 |  | Climate of Earth History - key Points | 52 |  | Uncharted Territory Ahead |