Monster Seminar JAM - Remote Climate Forcing of Regime Shifts in Northwest Atlantic Shelf Ecosystems
Dr. Charles Greene, Department of Earth & Atmospheric Sciences, Cornell University
Regime shifts occur when perturbations to a system drive it from one alternative stable state, or regime, to another. Regime shifts in large marine ecosystems have often been associated with bottom-up forcing by climate, top-down forcing by overfishing, or some combination of the two. Determining the relative roles of climate and overfishing in forcing such regime shifts can be challenging because of our limited understanding of marine ecosystem dynamics and their responses to both natural and anthropogenic perturbations. In this talk, I will focus on the role of climate in forcing regime shifts in Northwest Atlantic shelf ecosystems. Specifically, I will explore teleconnections linking the dynamics of these ecosystems to two important modes of high-latitude climate variability, the North Atlantic Oscillation (NAO) and the Arctic Oscillation (AO). I will conclude by discussing the implications of our findings for the management of these ecosystems and their living resources during the coming decades.
Date and Time:
November 12, 2009,
11:00 am - 12:00 pm