'Summer insolation' presentation slideshows

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Stacked (averaged) record of ice age cycles over the last 3 million years

Stacked (averaged) record of ice age cycles over the last 3 million years. Lisiecki and Raymo, 2004 (as plotted by Clark et al. 2006). Summary Plio-Pleistocene Ice Cycles.

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What Controls the Size of Ice Sheets?

What Controls the Size of Ice Sheets?. The Last Glacial Maximum. 20,000 years ago Ice sheets surrounded much of the arctic ocean Ice covered North America, Europe, and Asia NY was completely covered by ice. Positive Glacial Budget. Accumulation > Ablation Cooling trend over the last 55 My

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Orbital Theory of the Ice Ages

Orbital Theory of the Ice Ages. Interglacial. Glacial. Milankovitch Theory of the Ice Ages. Milutin Milankovitch (1941) Kanon der Erdbestrahlung und seine Anwendung auf das Eiszeitenproblem (Canon of Insolation of the Earth and Its Application to the Problem of the Ice Ages).

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(Chapter 11)

Lecture 13 Orbital-Scale Interactions, Feedbacks and Unresolved Problems The Cause of Glacial Cycles?. (Chapter 11). The Question!. ~1 o / oo. The questions: Why 41 kyr cycle from 2.75 to 0.9 ma? Why 100 kyr after 0.9 ma? Why glacial cycle started about 2.75 ma?. Large glaciation phase.

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Orbital-Scale Interactions in the Climate System

Chapter 12. Orbital-Scale Interactions in the Climate System. ????:???. Orbital-Scale Forcing and Response Revisited. Fast response time. Slow response time. Fast response time. One part of the climate system has a fast response time , measured in months or years. Example: monsoon.

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What drives the ice age cycles?

What drives the ice age cycles?. Milankovitch Theory of orbital forcing of ice sheets. Tilt variations eccentricity variations precession of perihelion. Axial Tilt. Axial Tilt. Eccentricity. Eccentricity. Precession of Solstices (or Perihelion). Precession of Solstices. Precession.

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QZ Hao et al. Nature 000 , 1-4 (2012) doi:10.1038/nature11493

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