[[PageOutline]] = '''2009 Stream 3 : New features'' = [[BR]] Last edited [[Timestamp]] ---- [[BR]] == Substream 3.1 : from the community == [[BR]] It is of paramount importance to incorporate features developed in the NEMO community and identified as priorities by the Developer’s Committee in order to improve the system and encourage further developments. The 7 actions are: • '''Tidal mixing scheme''' (Bessière 2007, Koch-Larrouy 2008, Koch-Larrouy et al 2008a,b,c)[[BR]] Status: zdftmx.F90 added in the trunk and validated in orca2-lim (NEMO-paris), see ticket #425 . It includes both a bottom intensified vertical mixing in area of internal tide generation and a intensification throughout the water column in the Indonesian area. [[BR]] Pending: on-line comments and minor optimisation. See detail in ticket #457 , paper documentation #458 [[BR]] • '''3 bands light penetration + ocean colour''' (Lengaigne et al CD07, GRL08)[[BR]] Status: traqsr.F90 updated in the trunk and validated in orca2-lim (NEMO-paris), see ticket #428 [[BR]] Pending: paper documentation, see ticket #459 [[BR]] • '''Diurnal cycle on solar radiation''' (Bernie et al. 2007)[[BR]] Status: the module exists and has been validated in orca05 simulation on NEMO v2 by S. Masson and co. Its incorporation in v3 has to be done by NEMO-Paris [[BR]] • '''Conservative Leap-Frog + Asselin filter''' (Leclair & Madec OM09)[[BR]] Status: ongoing work (NEMO-Paris). See detail [wiki:2009WP/2009Stream3/LeapFrogC] [[BR]] • '''Observations operator code and increments application''' [[BR]] Status: to be done by NEMO-Exeter. [[BR]] • '''Ice-shelf melting parameterisation''' (Wang & Beckmann AG07, PhD of P. Mathiot) [[BR]] Status: to be done by NEMO-Paris. The key issue here is that the existing code does not include the volume flux associated with the ice-shelf melting. A major change have to be performed prior to its incorporation in the reference version. [[BR]] • '''Parameterisation of katabatic winds''' (PhD of P. Mathiot) [[BR]] Status: to be done by NEMO-Paris. [[BR]] ---- == Substream 3.2 : from NEMO team (short-term) == [[BR]] It consists of the short-term developments associated with the priorities of each consortium members that will be incorporated into the system, as they can be useful for the user community. The actions of the 8 sub-stream are: • '''New forcing''' (Tidal potential, atmospheric pressure) and river input scheme (continuation & end)[[BR]] • '''Embedding sea-ice inside the ocean''' (continuation & end)[[BR]] • '''Revisit of mass and salt fluxes between ice, ocean and air''' (continuation & end) [[BR]] • '''New advection schemes''' (PPM, Quickest and Prather) [[BR]] • '''Lateral ocean physics''' (isoneutral operator, skew flux, Visbeck coefficients, slope limitation, Aiki formulation) (continuation & end)[[BR]] • '''Ice improvements''' (momentum forcing, snow-ice formation, EVP rheology in LIM2)[[BR]] • '''Improved s-coordinate option''' (hydrostatic pressure gradient computation, POLCOM-style s-coordinate) (continuation & end)[[BR]] • '''Vertical physics''': improvements of TKE scheme, addition of a Generic length scale model[[BR]] ---- == Substream 3.3 : from NEMO team (long-term) == [[BR]] It consists of the short-term developments associated with the priorities of each consortium members that will be incorporated into the system, as they can be useful for the user community. The actions of the 8 sub-stream are: • '''Revisit of the time stepping in TOP''' (2 years, start in 2009)[[BR]] • '''Split-explicit + vvl conservative scheme''' (2 years, started in 2008)[[BR]] • '''Toward a generalisation of the split-explicit free surface''' (2 years, start in 2009)[[BR]] • '''Inclusion of the effect of waves in the marginal ice zone''' (2 years, start in 2009)[[BR]] • '''Interface to the OASIS 4 coupler''' (2-3 years, ongoing, started in 2008)[[BR]] • '''AGRIF and sea-ice''' (from 0 order to LIM2 and 3 fully AGRIFed) (3 years, started in 2008)[[BR]] • '''Development of TAM''' (ANR VODA), with a major contribution from the LJK team (3 years, started in 2008)[[BR]] • '''High parallelisation on new plateforms''' (GPU graphic cards, OpenMP etc …, start in 2009)[[BR]] ----