Coupling information

New

A FAQ to explain how to print min and max value of exchanged fields through OASIS : ​https://forge.ipsl.jussieu.fr/igcmg_doc/wiki/DocLfaq#HowtohaveminandmaxvalueexchangedthroughOASIS

Fields exchanged in IPSL-CM6 coupler

• Variables in OASIS atmosphere:
  • sent to ocean :
    • 1 per sea ice time step (2 ocean time steps) : COTAUXXU, COTAUYYU, COTAUZZU, COTAUXXV, COTAUYYV, COTAUZZV, COWINDSP, COTOTRAI, COTOTSNO, COTOTEVA, COICEVAP, COQSRMIX, COQNSMIX, COSHFICE, CONSFICE, CODFLXDT
    • 1 time per day : COCALVIN (3 times), COLIQRUN
  • received from ocean : SISUTESW, SIICECOV, SIICTEMW, SIICEALW, CURRENTX, CURRENTY, CURRENTZ

COTAU[X,Y,Z][U,V] are wind stress components in a 3D geocentric referentiel. It's an average over sea-ice and free ocean (weighted by their respective fraction).

• Variables in OASIS ocean:
  • received from atmosphere :
    • 1 per sea ice time step (2 ocean time steps) : O_OTaux1, O_OTauy1, O_OTauz1, O_OTaux2, O_OTauy2, O_OTauz2, O_Wind10, OTotRain, OTotSnow, OTotEvap, OIceEvap, O_QsrMix, O_QnsMix, O_QsrIce, O_QnsIce, O_dQnsdT
    • 1 time per day : OCalving, OIceberg, OIcshelf, O_Runoff
  • sent to atmosphere: O_SSTSST, OIceFrc, O_TepIce, O_AlbIce, O_OCurx1, O_OCury1, O_OCurz1

O_OCur[x,y,z][1,2] are surface velocity components in a 3D geocentric referentiel. It's an average over sea-ice and free ocean (weighted by their respective fraction).

• Fields are exchanged every sea ice time step (2 ocean time steps). Except COLIQRUN et COCALVIN, exchanged once a day.

• Weights have been prepared offline.
  • v2 : nov 2016
  • v3 : march 2017

• ATM => OCE

Variable	Name ATM	Name OCE	Properties	Remark
wind stress along X axis	COTAUXXU	O_OTaux1	SCRIP bilinear interpolation tlmd -> uorc	Bug in Oasis : use of rmp_tlmd_to_uorc_BILINEAR_Corrected in IPSLCM6.0.8
wind stress along Y axis	COTAUYYU	O_OTauy1	SCRIP bilinear interpolation tlmd -> uorc	Bug in Oasis : use of rmp_tlmd_to_uorc_BILINEAR_Corrected in IPSLCM6.0.8
wind stress along Z axis	COTAUZZU	O_OTauz1	SCRIP bilinear interpolation tlmd -> uorc	Bug in Oasis : use of rmp_tlmd_to_uorc_BILINEAR_Corrected in IPSLCM6.0.8
wind stress along X axis	COTAUXXV	O_OTaux2	SCRIP bilinear interpolation tlmd -> vorc
wind stress along Y axis	COTAUYYV	O_OTauy2	SCRIP bilinear interpolation tlmd -> vorc
wind stress along Z axis	COTAUZZV	O_OTauz2	SCRIP bilinear interpolation tlmd -> vorc
wind speed 10m module	COWINDSP	O_Wind10	SCRIP bilinear interpolation tlmd -> torc	Bug in Oasis : use of rmp_tlmd_to_torc_BILINEAR_Corrected in IPSLCM6.0.8
Total rain	COTOTRAI	OTotRain	Conservative MOZAIC transformation tlmd -> torc
Total snow	COTOTSNO	OTotSnow	Conservative MOZAIC transformation tlmd -> torc
Total evap	COTOTEVA	OTotEvap	Conservative MOZAIC transformation tlmd -> torc
Evaporation Ice	COICEVAP	OIceEvap	Conservative MOZAIC transformation tlmd -> torc
Total solar heat flux	COQSRMIX	O_QsrMix	Conservative MOZAIC transformation tlmd -> torc
Total Non solar heat flux	COQNSMIX	O_QnsMix	Conservative MOZAIC transformation tlmd -> torc	long-wave + turbulent (sensible + latent)
Solar heat flux on ice	COSHFICE	O_QsrIce	Conservative MOZAIC transformation tlmd -> torc
Non solar heat flux on ice	CONSFICE	O_QnsIce	Conservative MOZAIC transformation tlmd -> torc
Non solar heat flux derivative over sea-ice	CODFLXDT	O_dQnsdT	Conservative MOZAIC transformation tlmd -> torc
calving	COCALVIN	OCalving, OIceberg, OIcshelf	conserved flux	Divided into iceberg calving north, Antarctic iceberg melting and Antarctic ice shelf melting in IPSLCM6.0.8. Coupled once a day
river flow	COLIQRUN	O_Runoff	conserved flux	Coupled once a day

• OCE => ATM

Variable	Name OCE	Name ATM	Properties	Remark
Weighted sea surface temperature	O_SSTSST	SISUTESW	Conservative MOZAIC transformation torc -> tlmd	Mean over time steps of : fraction_of_free_ocean * sea_surface_temp
Sea ice fraction	OIceFrc	SIICECOV	Conservative MOZAIC transformation torc -> tlmd	sea-ice fraction in [0,1]
Weighted Sea Ice Temperature	O_TepIce	SIICTEMW	Conservative MOZAIC transformation torc -> tlmd	Mean over time steps of : fraction_of_sea_ice * ice_surface_temp
Weighted Sea ice albedo	O_AlbIce	SIICEALW	Conservative MOZAIC transformation torc -> tlmd	Mean over time steps of : fraction_of_sea_ice * ice_surface_albedo
Current surface	O_OCurx1	CURRENTX	Conservative MOZAIC transformation torc -> tlmd
Current surface	O_OCury1	CURRENTY	Conservative MOZAIC transformation torc -> tlmd
Current surface	O_OCurz1	CURRENTZ	Conservative MOZAIC transformation torc -> tlmd

Bugs

Run-off interpolation, and its bug

The method to interpolate run-off is described here. This methods had several bugs in the past, that are also detailed in this page.

Bug on linear interpolation

Normally, the wind stress is interpolated with the bilinear interpolation scheme of the Scrip library included in OASIS-MCT.

In IPSLCM6, in some model resolutions, the bilinear interpolation of the wind stress is bugged. A solution has been developed. It is described here.