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Last Glacial Maximum (LGM)

Explore the reconstruction of Last Glacial Maximum conditions using sediment cores, vegetation zones, and extent of glaciation. Compare CLIMAP assumptions and model results for a deeper understanding.

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Last Glacial Maximum (LGM)

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  1. Last Glacial Maximum (LGM) Reading is Chapter 12 in Ruddiman 2nd ed

  2. Boundary Conditions Removed figure for copy right reasons. Figure 12-1 from Earth's Climate - Past and Present by William Ruddiman 2008

  3. Boundary Conditions Removed figures for copy right reasons. Figure 12-1 from Earth's Climate - Past and Present by William Ruddiman 2008 Figure 7-2 from Earth's Climate - Past and Present by William Ruddiman 2008 Obliquity – From Analyseries

  4. CLImate MApping and Prediction • The project was funded by the NSF • Imbrie, Hays, and Shackleton • Reconstruct LGM • Sediment cores to reconstruct oceanic conditions • Vegetative zones • Extent of glaciation

  5. In class activity part #1 • In groups of four • Skim the CLIMAP papers for the assumptions (modern and/or LGM) used in the model-based LGM reconstruction • CLIMAP (1976), The surface of the ice-age earth, Science, 191(4232), 1131-1137. • CLIMAP (1984), The last interglacial ocean, Quatern. Res., 21(2), 123. • Compare between papers

  6. CLIMAP assumptions

  7. In class activity part #2 Let’s look at the model results from CLIMAP for the LGM in your web browser, go to http://iridl.ldeo.columbia.edu/SOURCES/.CLIMAP/

  8. Modern vs. LGM

  9. Temperature in the Tropics

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