[Lcefiec] MAÑANA: COLOQUIO EXTRAORDINARIO: "EVALUATING GLOBAL CLIMATE RESPONSES TO DIFFERENT FORCINGS USING SIMPLE INDICES"

[coloquios]

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Coloquio del Departamento de Ciencias de la Atmósfera y los Océanos
(DCAO)/
Centro de Investigaciones del Mar y la Atmósfera (CIMA)

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VIERNES 26 DE OCTUBRE, 14HS, 2 PISO, DCAO, AULA 8

COLOQUIO EXTRAORDINARIO
EVALUATING GLOBAL CLIMATE RESPONSES TO DIFFERENT FORCINGS USING SIMPLE
INDICES

David Karoly
School of Earth Sciences, University of Melbourne, Australia

Resumen:

The most common indicator of global scale climate change is the
global-mean surface air temperature. There are several additional
indices of global scale temperature variations that are useful for
distinguishing natural internal climate variations from anthropogenic
climate change (Karoly and Braganza 2001, Drost et al., 2011). These
include the contrast between the average temperatures over land and 
over
oceans, the meridional temperature gradient in the Northern Hemisphere,
and the magnitude of the annual cycle of temperatures over land. They
are nearly independent of the global mean temperature for natural
internal climate variations at decadal time scales and represent
different aspects of the climate system, yet they show common responses
to anthropogenic climate change.

Here, I will report on analyses of the CMIP5 historical simulations,
comparing the decadal variability of the indices with that from 3
observational datasets and from CMIP3 model simulations, as well as
comparing the trends of the indices over the last fifty years. The 
CMIP5
greenhouse-gas-only and natural-only forcing runs for the historical
period are used to assess the climate responses in these indices to
greenhouse gas, natural and anthropogenic aerosol forcing variations
from the different models.

Professor David Karoly is an internationally recognised expert in
climate change and climate variability, including greenhouse climate
change, stratospheric ozone depletion and interannual climate 
variations
due to El Niño-Southern Oscillation. He was heavily involved in
preparation of the Fourth Assessment Report of the Intergovernmental
Panel on Climate Change (IPCC) released in 2007, in several different
roles. Professor Karoly is a member of the new Climate Change Authority
in Australia. He is also a member of the Science Advisory Panel to the
Australian Climate Commission, the Wentworth Group of Concerned
Scientists, and the Joint Scientific Committee, which provides 
oversight
of the World Climate Research Programme.

Lugar: Aula 8, 2º Piso, DCAO
Pabellón 2,
Ciudad Universitaria.

¡Los esperamos a todos!

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Grupo Coloquios
Departamento de Ciencias de la Atmosfera y los Oceanos (FCEN-UBA)
Centro de Investigaciones del Mar y la Atmosfera (CONICET-UBA)
Ciudad Universitaria, 2do piso.
email: coloquios at at.fcen.uba.ar
http://www.at.fcen.uba.ar/charlas_not.php
http://www.cima.fcen.uba.ar/espanol/index.htm
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