IUGG 2011 Symposium on 'Manifestation of anthropogenic forcing and natural variability in the Arctic and Antarctic climate systems'

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IUGG 2011 Symposium on 'Manifestation of anthropogenic forcing and natural variability in the Arctic and Antarctic climate systems'

Siobhan.O'farrell

Dear CryoList:

 

This is an invitation for abstracts for the joint session  JM-05 " Manifestation of anthropogenic forcing and natural variability in the Arctic and Antarctic climate systems " at the XXV International Union of Geodesy and Geophysics (IUGG) General Assembly -- Earth on the Edge: Science for a Sustainable Planet

 

When: 28 June - 7 July 2011

Where: Melbourne Convention & Exhibition Centre; Melbourne, Australia

 

http://www.iugg2011.com/program-iacs.asp

 

Organiser: IAMAS, IAPSO, IACS

Lead Convenors: Siobhan O’Farrell (Australia)

Co-Convenors:  David Reusch (USA), Jason Box (USA)

 

 

This last decade has seen record sea ice-extent minima in the Arctic while the Antarctic has shown little change in sea ice variability.  At the same time, the Greenland ice sheet, Antarctic Peninsula ice shelves, and West Antarctic outlet glaciers and surface temperatures are all showing increasing evidence of a change in behaviour.  The combined effects of anthropogenic forcing and natural variability modes are thus yielding different levels of response in the atmosphere, ocean and cryospheric components of the two polar climate systems and a combination of both atmospheric and oceanic drivers are controlling the cryospheric climate response.

 

This session will look at the contrasting climate responses in atmosphere, ocean and cryosphere, asking several key questions. 1) Where can we detect the anthropogenic signal in the polar climate system (e.g. temperature, sea level pressure, sea ice extent, ocean water mass properties, etc.)?  2) Identifying how the large-scale natural variability driving the climate system affects these same climate variables, whether the changes exceed natural variability “noise” levels in the system, and does reality mirror model-projected change.  3)  Are the main modes of natural variability influencing the Polar Regions (AO, PDO, SAM and ENSO) themselves experiencing changes in frequency, strength and patterns due to forcings from increasing greenhouse gases and changes to ozone and aerosols?

 

We are interested in soliciting papers from the atmospheric, oceanic and cryospheric communities, from observational, theoretical and modelling perspectives, addressing these questions and the role of natural variability and/or anthropogenic signals in individual climate components, or across the climate system.

 

 

 

Review: All contributed abstracts will be reviewed by the Convenors

 

Options: Accepted abstracts will be presented as either oral or posters as determined by the convenors.

 

Call for Abstracts Close: 17 January 2011

 

 


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