Objective
Objectives :
To identify the patterns of the decadal variability in
the atmosphere and in the oceans and to identify the
nature of the variability. To identify the nature of
teleconnections in the tropical and midlatitudes regions,
especially with a link to the tropical biennial
cycle.
To investigate the nature of the contribution of
intraseasonal processes (MJO, Blocking) to the
interannual variability. To investigate possible
mechanisms for influences of the interannual variability
by the decadal variability (subduction, gyre dynamics,
etc...).
To investigate the links between the ENSO, the Asian
Summer Monsoon,
and the Tropical Atlantic
Brief Description of the Research Project :
Several research projects, either under way or about to
be completed, have shown the rich character of climate
variability at several time scales. It has been exposed
how several major time scales of variability are often
superposed and strongly interacting with each other. The
interannual time scale seems to play a pivotal role,
interacting strongly at the lower end of the spectrum
with intraseasonal variability, i.e. intraseasonal
oscillations of various kinds, among which the Madden-Julian Oscillation (MJO) is prominent. At the other end,
the interannual variability is affected by interactions
with longer time scales, as for instance, the Southern
Oscillation (SO) system.
Evidence is starting to emerge of a biennial cycle
connected with the ENSO-monsoon relation ship that has
not been sufficiently investigated. There are also clues
that ocean and atmosphere are coupled at the
intraseasonal time-scale and that this scale can interact
with the large scale variability of the system. For
instance, westerly wind
bursts in the Western Pacific are very important for
extracting heat from the ocean and for initiating
eastward motion of surface water. Whether these events
can act as a preconditioning of ENSO, or what other
function they have within the ENSO- Monsoon system, needs
clarification.
The overall target of SINTEX is to assess the possible
mechanisms of modulation by the decadal variability of
the interannual variations, and rather long simulations
(longer than 100 years) with coupled models with
realistic equatorial dynamics are needed.
The core numerical simulations will be performed by three
main coupled atmosphere/ocean model combinations, each of
them including state-of-the-art, advanced, global models:
A finite difference model both in the atmosphere and
ocean with high horizontal resolution in the ocean
(UKMO), a finite difference model with an original
coupling approach that allows evaluation of the model
physics on the ocean grid (LMD-OPA), a state-of-the-art
spectral model coupled to an advanced ocean model via a
coupler that guarantees energetic consistency in the
exchange (ECHAM4-OPA). The simulations will be
complemented by analysis of existing coupled simulations
and/or SST-prescribed experiments. ECHAM4-OPA will be
specially assembled for SINTEX by a transnational effort
of research groups in different European nations. The
horizontal resolution will be set at a moderate level
(spectral T30/T42 for the atmosphere and to 1-2 degrees
for the ocean, with equatorial enhancement of resolution
to 0.5 degrees) to allow long simulations, but at the
same time a very realistic simulations of tropical
interactions.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences earth and related environmental sciences atmospheric sciences climatology climatic changes el niño
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
40129 BOLOGNA
Italy
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.