The Chemistry of the global Atmosphere represented
in Lagrangian and
Eulerian Simulations
The Chemistry of the global Atmosphere represented
in Lagrangian and
Eulerian Simulations (ChArLES)
is a grid-computing project within the DEISA / DECI
(Distributed European Infrastructure for Supercomputing Applications /
DEISA Extreme Computing Initiative) framework.
Simulating the chemistry of the Earth's atmosphere is a challenging task,
both scientifically and computationally, because it combines many disciplines
and a large range of space and time scales. The atmospheric chemistry
general circulation model ECHAM5/MESSy (http://www.messy-interface.org)
combines two complementary approaches which can be used simultaneously
within a consistent framework: The Eulerian formulation, where the processes
are calculated in stationary grid-boxes, and the Lagrangian formulation
where the processes are calculated along dynamical trajectories. The former
approach has been proven to be successful at sufficiently high horizontal
and vertical resolutions. The latter approach, which holds great promise for
the quantification of transport fluxes of trace species and important
precursors between different regions of the globe, is presently in
development. It is expected that the Lagrangian approach will produce many
more details and much higher accuracy with less computational effort (i.e.,
at a reduced resolution) compared to the corresponding Eulerian
simulation. The infrastructure and technologies provided by DEISA, in
particular the available computing time, the storage capacities and the data
transfer systems, will provide the ideal environment to test the convergence
of the Eulerian results (with increasing grid resolution), being a
prerequisite for the evaluation of the newly developed Lagrangian approach.
external link:
http://www.deisa.eu/science/deci/projects2007-2008/ChArLES
This page was last modified on
05 Jun 2008.