Importance of this Unit to the Course
We have seen in previous units that climate models can give simulations of past as well as present and future climates. But we don't have temperature measurements going back more than about 150 years, so we rely on "proxy" measurements of temperature and precipitation to provide evidence climatic conditions hundreds and thousands of years ago. This will allow us to test climate models for accuracy and also offer a better perspective of current climate conditions and how much they might be expected to change if the future were to be similar to the past.
Preparation for Discussion (You must complete this section before class.)
(online / face-to-face)
(See your portfolio for due dates and times)
A major component of the course is participation in the online dialog. The following types of comments are required:
If the paleoclimate record showed that we had major droughts (lasting 20 years) that seemed to reoccur every 300 years and we haven't had one for 400 years, will it be highly likely that we will get one in the next decade?
How is it possible to get tree ring data from 1000 years ago in an area where there are no trees older than 200 years?