Date

Multiple Session Announcements and Calls for Abstracts
American Geophysical Union Fall Meeting
5-9 December 2011
San Francisco, California

Abstract Submission Deadline for all Sessions:
Thursday, 4 August 2011

  1. C09 - Dynamics of Permafrost Degradation - Impacts and Feedbacks

  2. GC23 - Impacts of Changing Seasonality on Arctic Systems

  3. EP09 - From Rock to Clay: Evolution of Grain-Size Distributions in
    Geomorphic Systems


  1. C09 - Dynamics of Permafrost Degradation - Impacts and Feedbacks

Organizers of Session C09, "Dynamics of Permafrost Degradation - Impacts
and Feedbacks," announce a call for abstracts. The session will be
convened at the American Geophysical Union (AGU) Fall Meeting, 5-9
December 2011 in San Francisco, California.

Permafrost underlies 24 percent of Earth's land surface with thermokarst
processes affecting ice-rich terrain. Organizers of this session solicit
papers reflecting current knowledge of permafrost degradation dynamics,
including impacts of disturbance and climate change, and resulting
climate feedbacks. Submissions are welcome from a range of
permafrost/climate dynamics topics, including remote sensing of
permafrost degradation (satellite, airborne, and ground-based
geophysics); field-based or modeling process studies;
cryolithologic/paleoenvironmental studies; biogeochemistry;
geomorphologic/ecohydrologic feedbacks; landscape-scale modeling;
integration of permafrost degradation into land surface and carbon cycle
models; and probabilistic risk assessments.

The abstract submission deadline for this and all other sessions is
Thursday, 4 August 2011 at 11:59 p.m. Eastern Daylight Time. To submit
an abstract, you must enter the first author's current AGU member ID and
password at: http://agu-fm11.abstractcentral.com/.

For further information, please contact:
Guido Grosse
Email: ggrosse [at] gi.alaska.edu

Anna Liljedahl
Email: akliljedahl [at] alaska.edu

Cynthia Dinwiddie
Email: cdinwiddie [at] cnwra.swri.edu

Sarah Godsey
Email: seg19 [at] psu.edu


  1. GC23 - Impacts of Changing Seasonality on Arctic Systems

Organizers of Session GC23, "Impacts of Changing Seasonality on Arctic
Systems," announce a call for abstracts. The session will be convened at
the American Geophysical Union (AGU) Fall Meeting, 5-9 December 2011 in
San Francisco, California.

Climate change is strongly affecting the atmosphere, ice, ocean, and
land masses in the arctic region. Several positive feedback mechanisms
have the potential to amplify the changing seasonality of the Arctic. In
particular, changing climate will affect important biological, chemical,
and physical dynamics occurring during the spring and fall, seasons that
traditionally have not been the focus of extensive field research.

Organizers propose to explore how changing seasonality is affecting
physical and biogeochemical dynamics in arctic terrestrial, freshwater,
coastal, and marine systems. This session invites presentations on
research from NSF's "Changing Seasonality in Arctic Systems" program and
similar research efforts.

Organizers invite contributions from researchers focusing on how climate
change will affect biological, chemical, and physical dynamics occurring
during the spring and fall seasons in arctic terrestrial, freshwater,
coastal, and marine systems.

The abstract submission deadline for this and all other sessions is
Thursday, 4 August 2011 at 11:59 p.m. Eastern Daylight Time. To submit
an abstract, you must enter the first author's current AGU member ID and
password at: http://agu-fm11.abstractcentral.com/.

For further information, please contact:
Kyle Whittinghill
Email: kyle.whittinghill [at] unh.edu

Breck Bowden
Email: breck.bowden [at] uvm.edu

Howard Epstein
Email: hee2b [at] virginia.edu

Luc Rainville
Email: rainville [at] apl.washington.edu


  1. EP09 - From Rock to Clay: Evolution of Grain-Size Distributions in
    Geomorphic Systems

Organizers of Session EP09, "From Rock to Clay: Evolution of Grain-Size
Distributions in Geomorphic Systems," announce a call for abstracts. The
session will be convened at the American Geophysical Union (AGU) Fall
Meeting, 5-9 December 2011 in San Francisco, California.

Landscapes are shaped by processes that produce, transport, and deposit
mixtures of particles. Information on how sediment has been produced and
modified is encoded in grain size distributions, which evolve after
sediment production by mixing from different sources, size reduction by
physical and chemical attack, and sorting during transport and
deposition. Understanding how size distributions evolve is central to
problems in hillslope, fluvial, aeolian, coastal, and submarine systems.

Organizers seek contributions from studies encompassing sediment
dispersal and sorting, land-atmosphere processes, measurement techniques
and data analysis, and statistical characterization and modeling of
particle size distributions.

The abstract submission deadline for this and all other sessions is
Thursday, 4 August 2011 at 11:59 p.m. Eastern Daylight Time. To submit
an abstract, you must enter the first author's current AGU member ID and
password at: http://agu-fm11.abstractcentral.com/.

For further information, please contact:
P. Thompson Davis
Email: pdavis [at] bentley.edu

Bjorn Machalett
Email: b.machalett [at] nakula.de

Eric A. Oches
Email: roches [at] bentley.edu

Clifford S. Riebe
Email: criebe [at] uwyo.edu

Leonard S. Sklar
Email: leonard [at] sfsu.edu