# Analysis Seminar

#### Continuous Data Assimilation for Geophysical Models Employing Coarse Mesh Observables

**Speaker:**
Edriss Titi, Texas A&M University and Weizmann Institute of Science

**Location:**
Warren Weaver Hall 101

**Date:**
Friday, November 6, 2015, 10 a.m.

**Synopsis:**

In this talk we will implement the notion of finite number of determining parameters for the long-time dynamics of the Navier-Stokes equations (NSE), such as determining modes, nodes, volume elements, and other determining interpolants, to design finite-dimensional feedback control for stabilizing their solutions. The same approach is found to be applicable for data assimilation of weather prediction. In addition, we will show that the long-time dynamics of the NSE can be imbedded in an infinite-dimensional dynamical system that is induced by an ordinary differential equations, named determining form, which is governed by a globally Lipschitz vector field. The NSE are used as an illustrative example, and all the above mentioned results equally hold to other dissipative evolution PDEs.