| January 17, 2012 |
| |
A Dynamical Systems Approach to a Conceptual Climate Model, Anna Barry, Boston University |
| |
|
A coupled system consisting of an Energy Balance Model,
moving iceline, and forcing due to greenhouse gases is
explored using techniques from dynamical systems. |
| |
Download slides. |
| January 25, 2012 |
| |
Widiasih's Theorem and a Few of its Consequences, Jim
Walsh, Oberlin College |
| |
|
Esther Widiasih has considered energy balance models from a
dynamical systems perspective with considerable success. We present Widiasih's
Theorem, along with applications thereof to variants of the standard Budyko-Sellers
model. |
| |
Download slides. |
| February 1, 2012 |
| |
An Estimate of the Widiasih Parameter,
Richard McGehee, School of Mathematics |
| |
|
Esther Widiasih introduced a dynamic ice line equation into the Budyko energy balance model. The equation contains a parameter controlling the rate at which the ice line advances and retreats. Paleoclimate data can be used to estimate the value of the parameter. |
| |
Download slides. |
| February 8, 2012 |
| |
The Temperature Proxy Controversy,
Larry Gray, School of Mathematics |
| |
|
In 2010, the two statisticians McShane and Wyner published a paper in
which they raised serious doubts about the way in which various
"temperature proxies", such as tree ring and ice core data, have
been used to estimate global mean temperatures from the past 1000
years. This paper caused such an uproar that an entire issue of the
Annals of Applied Statistics was devoted to it, with about a dozen
papers attacking and defending the work. This talk will be a mostly
non-technical overview of the debate. Bring your hockey sticks. |
| |
Download slides. |
