[iris-bulk] AGU Special Session on the Asthenosphere - U09

[Tobias Höink]

Dear Colleagues,

We encourage you to participate in the multi-disciplinary session  
"U09: Different Views on One Asthenosphere" at the 2008 AGU fall  
meeting in San Francisco.

We are very pleased to present as invited speakers

Karsten Bahr, Universität Göttingen
Clint Conrad, University of Hawaii
Colleen Dalton, Boston University
Alberto Saal, Brown University



U09: Different Views on One Asthenosphere

It is generally accepted that the asthenosphere is a mechanically  
weak region in the shallow mantle underneath the lithosphere. Even  
so, every discipline has a different perspective on what the  
asthenosphere is. For example, it has been termed the low (seismic)  
velocity zone and the low-viscosity zone, and its unique properties  
have been attributed to either mineral properties at relevant  
temperatures and pressures or to the presence of melt and/or water.

While we have a good understanding of some of the asthenosphere's  
properties and know of the importance of this thin layer as it  
influences mantle flow, we are still seeking a unified picture that  
includes independent constraints from all relevant disciplines.

In this session we will explore different views on the asthenosphere  
to (1) identify first order characteristics (e.g. location, depth,  
viscosity, seismic velocity, anisotropy, attenuation, electrical  
conductivity, density, flow field, lateral variations) and (2)  
combine observations to provide a forum to discuss a unified picture  
of the asthenosphere.


Submission deadline is 10 September 2008. (You can submit at http:// 
submissions3.agu.org/submission/entrance.asp)

We look forward to learning about your recent work!

Tobias Höink
Rice University

Greg Hirth
Brown University


Please forward his information to colleagues who might be interested  
in this session.
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