GG231 Lecture Notes - Lecture 12: Milankovitch Cycles, Pleistocene, Axial Tilt
Document Summary
Introduction: climate change is a natural phenomenon that occurs in both the short-term and long-term. As with many of the natural hazards, ecosystems adapt to change in the environment and adjust accordingly to extended periods of cold or heat. This could push the global climate into a new regime that the environment and humans are not adapted to: acceptance of theories on climate change has been difficult. Long term changes can be linked to the amount of solar radiation the earth receives. This will vary depending on the orbit of the. Fluctuations in glacial periods provides evidence of long-term change. For instance, there is considerable evidence in the southern ontario landscape of numerous glacial periods (during the. Most canadian cities were covered with an ice sheet. 1-2km thick about 16,000 to 20,000 years ago: short term change. Temperature records over the past several centuries record warming during this period.
