French HPC Ecosystem and Strategy and the Role of CEA
Author/Presenter
Event Type
Workshop
Applications
Government Strategies, Programs, and Funding
HPC Center Planning and Operations
TimeMonday, November 13th2pm -
2:15pm
Location708
DescriptionThe initialization for decadal predictions using a
coupled model includes a long-term cycle of data
assimilation in the coupling framework, which is an
essential step of decadal prediction. The skill of
decadal prediction closely relies on the performance of
the assimilation scheme used in the initialization.
Currently, most decadal prediction experiments conducted
in the Coupled Model Intercomparison Project Phase 5
(CMIP5) simply used the nudging approach, and very few
applied the variational or ensemble methods that are
very expensive in computing. Therefore, it is necessary
to develop an assimilation scheme that can well use the
observations in an economical way. In this paper, we
propose a coupled assimilation scheme that can
incorporate 4-dimensional ocean observations (say
temperature and salinity) into the IC of ocean component
model and in the meantime can be timesaving. Numerical
experiments using a coupled climate system model are
conducted to test the performance of the new
assimilation scheme.
