From now, up until 13 January 2016, you can submit your abstract for the upcoming EGU General Assembly (EGU 2016).
ST4.6/CL2.05
Solar Irradiance variability and its effects on Climate (co-organized)
Convener: Martin Snow
Co-Conveners: K. Tourpali
, Stergios Misios
Variability of the incoming solar irradiance and its effects on
climate have received wide attention over the recent years. There is a
continuous effort to reduce uncertainties in measurements of the total
and spectral solar spectral irradiances, physical and empirical
modelling have undergone considerable progress and novel statistical
analyses have been employed. At the same time, numerical models and
observations are extensively used to characterize the influence of the
solar irradiance variability on climate. This session invites abstracts
on measurements and models of solar spectral and total irradiance as
well as abstracts on the atmospheric response to solar irradiance
variability. Abstracts on comparison of atmospheric effects to different
solar irradiance datasets are particularly welcome.
ST4.4
Advances in investigation of solar-terrestrial activity in the wake of upcoming Maunder Minimum.
Convener: Valentina Zharkova
Co-Conveners: Nicola Scafetta
, Jan-Erik Solheim
In this session we invite presentations of research investigating
various aspects of solar and solar-terrestrial activity during the past
century, millennium and other scales and their interpretation with
dynamo models. Many observations indicate that solar activity is
approaching a hybernation stage comparable with Maunder Minimum recorded
in the 17th century. All aspects of these changes are now under very
close scrutiny, or order to understand the implication of this phase for
the Earth and the whole Solar System.
ST4.3
Energetic Particles in the Heliosphere and their Influence on Space Weather, Space Climate and the Terrestrial Atmosphere.
Convener: Simon R Thomas
Co-Conveners: Timo Laitinen
, Ilya Usoskin
, Keri Nicoll
, Bernd Heber
The heliosphere is permeated with energetic particles of different
compositions, energy spectra and origins. Two major populations of these
particles are galactic cosmic rays (GCRs), which originate from outside
of the heliosphere and are constantly detected at Earth, and solar
energetic particles (SEPs) which are accelerated at/near the Sun during
solar flares or by shock fronts associated with the transit of coronal
mass ejections. Enhancements in energetic particle fluxes at Earth pose a
hazard to humans and technology in space and at high altitudes. Within
the magnetosphere, energetic particles are present in the radiation
belts, and particle precipitation is responsible for the aurora and for
hazards to satellites. Energetic particles have also been shown to cause
changes is the chemistry of the middle and upper atmosphere with
potential influence on regional or even global climate, and, on a
shorter time-scale, can influence the global electric circuit.
Furthermore, such particles can produce cosmogenic radionuclides within
the atmosphere, which become stored in natural terrestrial archives. The
records of these trapped particles make a quantitative proxy for
long-term solar variability. This meeting will aim to address the
passage of energetic particles through the heliosphere, their detection
at Earth and the effects they have on the terrestrial atmosphere when
they arrive. This session will aim to address the passage of energetic
particles through the heliosphere, their detection at Earth and the
effects they have on the terrestrial atmosphere when they arrive. It
will bring together scientists from several fields of research in what
is now very much an interdisciplinary area. The session will allow
sharing of expertise amongst international researchers as well as
showcase the recent advances being made in this field, which demonstrate
the importance of the study of these energetic particle populations.