Richard McGehee University of Minnesota
School of Mathematics


The Mathematics of Climate



November 24

Homoclinic Bifurcation in Welander's Model

Julie Leifeld
School of Mathematics

11:15 Tuesday, November 24, 2015
570 Vincent Hall


December 1

Models of species' climate niche: an example of classification algorithms

Jessica Hellman
Institute on the Environment

11:15 Tuesday, December 1, 2015
570 Vincent Hall

For purposes of basic knowledge and conservation planning, ecologists seek to characterize the climatic conditions that limit where species live on Earth. To do this, they build statistical models that describe the climatic niche of individual species based on its geographic occupancy. These models, e.g., MaxEnt, are classification algorithms that aim to distinguish occupied from non-occupied points from a set of climatic descriptors. With a description of a species' ecological niche, it is possible to project these conditions forward in time according to global circulation model output and identify locations that might be suitable for the focal species in the future. We will discuss some examples of how these models are used, criticisms that ecologists have leveled at these models, and one particular dilemma having to do with local adaptation of populations within a species' range.


December 8

Using multiple time-scales to understand Dansgaard-Oeschger events

Andrew Roberts
Cornell University

11:15 Tuesday, December 8, 2015
570 Vincent Hall


Time and Location

The meetings are held in 570 Vincent Hall at 11:15 on Tuesdays, followed by an extended discussion over lunch at the Bona Restaurant.

WebEx Session

We will broadcast the seminar to remote participants via WebEx. If you would like to receive a weekly invitation to the sessions, please send an email to Julie Leifled <>.



Richard McGehee, School of Mathematics,
Clarence Lehman, Department of Ecology, Evolution and Behavior,



This seminar examines some of the simpler mathematical models of climate in the recent literature. Participants are encouraged to read a paper and report on it to the other participants, but passive participation is also welcomed. Course credit can be arranged either through the School of Mathematics or the Department of Ecology, Evolution and Behavior by arrangement with the organizers.



This seminar is associated with the NSF sponsored Mathematics and Climate Research Network.


Last update: November 23, 2015 ©2015 Richard McGehee