Multiple Session Announcements and Calls for Abstracts - EGU General Assembly

Date

14 December 2012

Multiple Session Announcements and Calls for Abstracts
European Geoscience Union General Assembly
7-12 April 2013
Vienna, Austria

BG2.17 - Snow-Shrub Interactions: Exploring the Hydrology,
Biochemistry, and Ecology of Changing Tundra Ecosystems
CL2.3 - Arctic Climate Change: Governing Mechanisms and Global
Implications
SSP3.1 - From the Mountains to the Sea: Significance of Grain-Size
Distributions in Stratigraphy, Sedimentology, and Paleoclimatology

BG2.17 - Snow-Shrub Interactions: Exploring the Hydrology,
Biochemistry, and Ecology of Changing Tundra Ecosystems

Organizers of session BG2.17, "Snow-Shrub Interactions: Exploring the
Hydrology, Biochemistry, and Ecology of Changing Tundra Ecosystems"
announce a call for abstracts. The session will be convened at the
European Geoscience Union (EGU) General Assembly, 7-12 April 2013 in
Vienna, Austria.

Surface air temperature in the Arctic has increased faster than in
any other part of the globe, at a rate of 0.4C per decade since the
mid-1960s. This warming has led to a decrease of approximately 10% of
the areal coverage of snow, with a further 9 to 18% projected by the
end of the century. The spatial distribution, depth, and thermal
properties of snow are also affected by vegetation cover. Increasing
evidence from field observations, remotely sensed data and models
suggests that the recent climate warming is leading to a "greening"
of the Arctic. Tundra vegetation is known to respond quickly and
dynamically to increases in temperature and changes in snow cover,
notably through an increase in the cover and biomass of shrubs.
Herbivory, for example reindeer husbandry in Fennoscandia, also has a
strong control on shrub densities and distributions. The relationship
between shrubs and snow are at the core of feedback loops affecting
the energy balance and soil thermal regime and thus the biochemistry,
ecology, and hydrology of the Arctic.

Organizers welcome contributions investigating these relationships, with
a particular focus on:

- Advances in modeling of snow-shrub interactions,
- Remote sensing techniques to evaluate shrub expansion and/or the
effect of snow-shrub interactions on the energy balance at high
latitude,
- Shrub-snow-soil temperature interactions, and
- The role of herbivory in shrub expansion.

The abstract submission deadline for this and all other sessions is
Wednesday, 9 January 2013. To submit an abstract, please log in or
create an account at:
https://administrator.copernicus.org/authentication.php.

For further information, please contact:
Cecile Menard
Email: Cecile.Bauduin-Menard [at] fmi.fi

Marc Macias Fauria
Email: marc.maciasfauria [at] zoo.ox.ac.uk

CL2.3 - Arctic Climate Change: Governing Mechanisms and Global
Implications

Organizers of session CL2.3, "Arctic Climate Change: Governing
Mechanisms and Global Implications" announce a call for abstracts. The
session will be convened at the European Geoscience Union (EGU) General
Assembly, 7-12 April 2013 in Vienna, Austria.

One of the most striking features of global climate change is the
strongly amplified response of surface-air temperature in the Arctic.
Both observational and climate modeling studies have shown that the
Arctic is a region very susceptible to climate change; moreover, changes
occurring in the Arctic may have more wide-spread implications. Arctic
amplification manifests itself in a number of ways, most notably in the
current retreat and thinning of arctic sea ice. A variety of processes
and feedbacks contributing to amplified arctic warming have been
proposed. The most well-known is the surface-albedo feedback, which is
associated with retreating sea-ice and snow cover. Another important
mechanism involves changes in the meridional heat transport to the
northern high latitudes. While most climate models exhibit an arctic
amplification signal in response to ongoing and future changes, the
inter-model range in simulated amplification magnitude is large. This
suggests that the contribution to arctic warming from various feedbacks
is still uncertain.

The session specifically aims to identify, characterize, and quantify
the processes and feedbacks that govern amplified arctic warming; and it
also covers the climate impacts on the lower latitudes associated with
arctic changes--for instance, the impact of sea-ice reductions on
heat-flux changes and atmospheric circulation changes beyond the arctic
region. Organizers invite contributions on the causes, mechanisms, and
climate feedbacks associated with arctic climate change. Studies based
both on climate model results and/or observational datasets for
near-past, present, and future climate changes are welcome.

For further information, please contact:
Rune Grand Graversen
Email: rune [at] misu.su.se

Richard Bintanja
Email: bintanja [at] knmi.nl

SSP3.1 - From the Mountains to the Sea: Significance of Grain-Size
Distributions in Stratigraphy, Sedimentology, and Paleoclimatology

Organizers of session SSP3.1, "From the Mountains to the Sea:
Significance of Grain-Size Distributions in Stratigraphy, Sedimentology,
and Paleoclimatology - Analyses, Application, and Interpretation"
announce a call for abstracts. The session will be convened at the
European Geoscience Union (EGU) General Assembly, 7-12 April 2013 in
Vienna, Austria.

Geological 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. The detailed investigation of particle size
distributions of sediments, suspended load, or aerosols is an
increasingly used approach in assessing those environmentally driven
geophysical processes in sedimentary systems.

This session aims to provide a lively forum to review all aspects of
particle size investigations applied to terrestrial, coastal, marine,
lacustrine, or atmospheric environments. Examples include material
sorting, land-atmosphere processes, sediment dispersal studies, advances
in measurement techniques and data analysis, and statistical
characterization and modeling of particle size distributions.

For further information, please contact:
Bjoern Machalett
Email: b.machalett [at] nakula.de

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