[Todos] Seminario CSC-Giol: Data Assimilation for Detection and Attribution of Climate Change

[Esteban Mocskos]

Estimados,

El seminario que iba a tener lugar este martes en el CSC ha quedado
suspendido. Les pido disculpas por los inconvenientes que esta
suspensión pueda ocasionarles, y me comprometo a tenerlos al tanto de
la nueva fecha para el seminario.

Un saludo

Cecilia Galarza

> Lugar: Godoy Cruz 2390 1er piso
> Fecha: martes 18 de marzo 11hs
> 
> Title: Data Assimilation for Detection and Attribution of Climate Change
> (DADA)
> 
> Abstract: How can climate observations be used to best evidence the
> influence on climate of human activities, among other forcings?
> Statistical methods of Detection and Attribution (D&A) were designed
> to answer this question. Conventional D&A methods are based on linear
> regression of spatial or temporal patterns extracted from one or
> several climate models. On the other hand, how can observations be
> used to best constrain a numerical model's state variables and
> parameters? Methods of Data Assimilation (DA) meet this general
> purpose. Could D&A methods take advantage of recent progresses in DA?
> We discuss this general idea and illustrate it qualitatively by
> applying a simple data assimilation algorithm (AEKF) to a 1D radiative
> column model. The model simulates the vertical temperature structure
> of the atmosphere resulting from prescribed vertical profiles of key
> optical properties, as well as its dynamics when these optical
> properties are affected by changes in atmospheric constituents. In
> particular, it allows to represent the characteristic pattern of
> cooling of the stratosphere and warming of the troposphere under
> greenhouse gas forcing - an important historical fingerprint in D&A.
> We show that it is possible to reconstruct these forcings from the
> observation of the evolution of the vertical temperature profile based
> on data assimilation and thereby to evidence the influence of
> anthropogenic forcing on the evolution of climate.
> 
> 
> Dr. Hannart is a climate scientist from CNRS working at the Instituto
> Franco-Argentino sobre Estudios de Clima y sus Impactos (UMI-IFAECI).
>