Version 23 (modified by gm, 9 years ago) (diff)

Last edited Timestamp?

Author : Gurvan Madec

Ticket : #927

Branch : 2012/dev_r3309_LOCEAN12_Ediag

LOCEAN .12 - Energy diagnostics

Motivation: output 3D trends of tracers, momentum, kinetic energy and potential energy.
Status : the extraction of trends terms exists, but not the 3D output of the trends
Main tasks :

(1) implement the 3D output of tracers and momentum trends using iom_put
(2) compute and output the 3D trends of PE and KE
(3) validatation + documentation

Science Reviewer: NOCS guy?
System Reviewer: NOCS guy?
Deadline: spring 2012
Priority: high
Depends on: gurvan disponibilities
Principal Investigator : Gurvan Madec and Simona Flavoni (simona.flavoni@…)

Detail of the implementation

Step I : add the 3D output

see revision 3316

trdmod_oce module and namtrd namelist

logical flags added in namlist namtrd which now controls what is done with the trends.
All the types of treatment of a given trend are available at the same time. The memory requirement will only increase due to the time averaged arrays defined in IOM.

   LOGICAL , PUBLIC  ::   ln_dyn_trd   = .FALSE.        !: (T) 3D momentum             trends or (F) not
   LOGICAL , PUBLIC  ::   ln_tra_trd   = .FALSE.        !: (T) 3D tracer               trends or (F) not
   LOGICAL , PUBLIC  ::   ln_PE_trd    = .FALSE.        !: (T) 3D Potential Energy     trends or (F) not
   LOGICAL , PUBLIC  ::   ln_KE_trd    = .FALSE.        !: (T) 3D Kinetic   Energy     trends or (F) not
   LOGICAL , PUBLIC  ::   ln_vor_trd   = .FALSE.        !: (T) 3D barotropic vorticity trends or (F) not
   LOGICAL , PUBLIC  ::   ln_glo_trd   = .FALSE.        !: (T) global domain averaged diag for T, T^2, KE, and PE
   LOGICAL , PUBLIC  ::   ln_dyn_mld   = .FALSE.        !: (T) 2D tracer   trends averaged over the mixed layer 
   LOGICAL , PUBLIC  ::   ln_tra_mld   = .FALSE.        !: (T) 2D momentum trends averaged over the mixed layer 

Add these new logical in the namelist. =⇒>> CAUTION only in the ORCA2_LIM directory
NB: here is the new name set in revision number 3318

trdtra module

Add a systematic mask of the trend.
Change the comments to better describe the purpose of this module. Its purpose is:

'TRA' case: to regroup T & S trends and send them to trd_mod, with, in case of advection, transform the incoming advective fluxes into advctive trend (U.grad[T])
'TRC' case: send trend to ted_mod_trc, with, in case of advection, transform the incoming advective fluxes into advective trend
all cases : mask the trend (==⇒>> PROBABLY add in the module a lbc_lnk so that the trend is defined everywhere)

dynadv_cen2 and _ubs modules

change jpdyn_trd_had into jpdyn_trd_keg. Now in flux form _keg corresponds to the horizontal advection trends and _rvo to the metric terms

dynnxt module

add the output using mom of the total den trend (except asselin time filter) ("utrd_tot", "vtrd_tot") and of the asselin time filter trend ("utrd_atf", "vtrd_atf") but with a shift by one time step

dynvor, trdvor and trdmod_oce modules

suppress the call to trd_mod in the jpdyn_trd_dat case (computation of beta.V) add add the calculation of beta.V term in 'trdvor' in jpvor_pvo case. And obviously suppress jpdyn_trd_dat from trdmod_oce
Also suppress the jpdyn_trd_had case horizontal advection for the dynamics is 'keg' + 'vor' ; in case of flux form, 'had' is put in 'keg' and the metric terms is put in 'vor'
there is now only 10 trends on the dynamics instead of 12

trdmod module

1- introduce the new logical namelist parameters
2- introduce new subroutines : trd_budget : computation of the domain averaged T,T2, PE, KE trends formerly computes in trd_mod routine)
trd_3Diom: output of the 3D trends using IOM

trdicp module

add in trd_twr routine the computation of the vertical diffusive trend on T & S in case of iso-neutral diffusion (ln_traldf_iso=T). These trends ("ttrd_zdfp", "strd_zdfp") name zdfp for "PURE" vertical diffusion trends are output so that by difference with "zdf" trends we can access to the vertical contribution of the iso-neutral operator

iodef.xml file

add all the trends nick name : =⇒>> CAUTION only in the ORCA2_LIM directory

Step II : simplification of the structure

trdicp and trdicp_oce modules

see revision 3317

1- suppress trdicp_oce module (put required variables in trdmod_oce parameters)
2- use the jptra_trd_… instead of jpicp_… 3- move trd_budget subroutine from trdmod to trdicp.F90. Suppress trd_icp routine (i.e. trd_2d, trd_3d) as the work is now simply done in trd_budget.
4- rescan all dyn/tra trend indices. add jptra_trd_zdfp for "PURE Kz dissusive trend when ln_traldf_iso=T (see also changes in tranxt where a call to trd_tra is done just before the swap, so that PURE Kz trends can be diagnosed in tra_trd. See also xml file). 5- jptra_trd_nsr and jptra_trd_cdt are 3D trends as their incorporate both surface forcing AND runoff, the later being possibly spread in depth (=⇒>> probably to be changed)
6- suppress the key_trddyn key trdtra from trdicp

trdtra - trddyn - trdmod - trdvor modules : impact on TRA, DYN, TRD and almost all TOP_SRC modules

see revision 3318

Change the logic : split DYN and TRA trend diagnostics in separate modules

move the call to trd_… from the end of step to the select CASE(jp…_atf) i.e. when the last trend is send to trdtra or trddyn

Change the name of the trend indices from jptra_trd_xxx to jptra_xxx and from jpdyn_trd_yyy to jpdyn_yyy. This impact TRA,DYN, TRD but also all TOP_SRC

0- move trdmod_oce into trd_oce
1- trdvor: move the trdvor 1st part from trdmod to trevor module. Suppress the call of trd_vor from step (now called in trddyn for each trend, with the output done for the last trend (_atf).
2- create a trddyn that manage the distribution to iom, global mean, KE, vor, mld
3- trdtra in TRC case pre-process advective trends and then call trdmod_trc ; in TRA case: it regroups T & S trend in one and calla local routine to manage the distribution to iom, global mean, PE, mld
4- trdmod now contains only the trdmod_init routine. Rename all as trdini.F90 and ted_init subroutine 5- suppress all key_trd… keys (thanks to dynamical allocation) except for the top key: key_trdmld_trc. =⇒>> To be done

Step III : addition of 3D KE diagnostics

trdken module

see revision 3325

0- bug correction: in trddyn.F90 (ji,jj) =⇒> (:,:) in surface stress computation

1- create a trdken.F90 module which compute the KE trends at T-point and out them using IOM

TO BE DONE diagnose the KE local dissipation and associated diffusive fluxes ; diagnose bottom friction in all cases (implicit/explicit) ; in flux form, remove the KE*divh(U) from the H/V advection trends

Step IV : addition of 3D PE diagnostics

trdpen module

see revision XXXX

1- create a trdpen.F90 module which compute the PE trends at T-point and out them using IOM

Pending issues :

atmospheric pressure gradient trend not taken into account (see dynspg.F90 To be done !!!'''

kpp non-local trend put in zdf trends !!! this will not work ! a additional trend term should be add To be done !!!'''

problems to be solved: vvl case for tracer sad trends ; flux form case for had (keg) and zad momentum trends

add separate modules for each option …

create the momentum diag over the ML

create the 3D trends for KE and PE


Testing could consider (where appropriate) other configurations in addition to NVTK].

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