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Conveners: |
Increasing
evidence from around the world shows that the main driver of
terrestrial climate is the Sun. It is responsible for climate
variability that ranges from millennial, centennial, multi-decadal, and
seasonal timescales. The modulation of incoming solar radiation has
both external and internal components. The former is in the form of
intrinsic changes in solar magnetism while the latter arises from
variations in the distribution and amount of cloud cover as well as
changes in atmospheric transparency to solar radiation. Although
changes in solar irradiance are the only external climate forcing, the
resultant changes in the terrestrial climate systems are often modified
due to internal causes (e.g.,
atmosphere-ocean interactions and
anthropogenic effects at shorter time scales) and through complex
feedback mechanisms. Despite the enormous complexities and
difficulties, recent progress is now beginning to offer concrete
sun-climate physical mechanisms and processes that cover a very wide
range of spatial domains and temporal scales. It remains to be seen how
the diverse range of mechanistic processes and interconnections may be
superimposed to manifest the time-changing and
spatial-pattern-varying/shifting solar-induced responses that are
observed through both instrumental and proxy climate records across the
globe. It is of utmost importance to understand the origin of these
wide ranges of climate cycles to delineate natural climate variability
from anthropogenic causes. Such an understanding requires synergistic
effort from researchers across diverse scientific disciplines including
but not limited to solar physics, earth sciences, atmospheric sciences,
and mathematical modeling.
The
scientific agenda of Session ST07 of the AOGS-AGU (WPGM) Joint
Assembly (August 13-17 2012, Singapore) is to analyze available climate
records across the globe in diverse systems for presence of millennial
to seasonal scale climate variability. Abstracts are solicited for
presentation in this session from researchers across numerous
disciplines. Evidence of climate variability as retrieved from various
terrestrial proxy climate records (e.g.,
marine and lacustrine
sediments, corals, and tree-rings) and instrumental climate records
(air temperature and precipitation) can be presented. Discussions on
numerical climate models that simulate climate variability across a
broad range of time scales are also welcome. We shall strive to
understand the synchronicity in time and space of these climate cycles,
their relationship to the absolute changes in solar irradiance (our
best knowledge from sunspot and cosmogenic radionuclides), and
deciphering the complex feedback mechanisms underlying these cycles.
Instructions
for submission of abstracts can be obtained from the
AOGS-AGU 2012 conference website at http://www.asiaoceania.org/aogs2012.
Abstract submission opens January 15
and runs through March
12. Accepted abstracts will
be notified after April 9.
Conference registration closes on June
4. Watch this site
for all future updates on this session
including tentative list of the invited speakers.
Printable copy of this announcement can be downloaded from here.
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Last updated: January 06 2012 |