source: trunk/LMDZ.MARS/libf/phymars/thermcell_dqup.F90 @ 1655

Last change on this file since 1655 was 1212, checked in by aslmd, 11 years ago

LMDZ.MARS + MESOSCALE

A quite major commit, at least for MESOSCALE.
In a word: any ngrid deserves to be free.

  • no need to recompile when changing number of horizontal grid points or number of processors
  • latest version of LMDZ.MARS physics can be used
  • WARNING! Nesting is still yet to be fixed (since r1027)

Also some small bug fixes to LMDZ.MARS.

Changes in LMDZ.MARS

--> fixed a potential bug in thermal plume model because zlmax was computed both in thermcell_main_mars and calltherm_interface... so made it an OUT argument of calltherm_interface. also: changed the name to limz. and added precompiling flags to avoid the use of planetwide in MESOSCALE. in MESOSCALE we just go high enough (nlayer-5) and do not care about computational cost (although we certainly gain from not using MAXVAL).
--> moved allocations upward in inifis. does not change anything for GCM, but make MESOSCALE modifications simpler, and overall make inifis better organized: first allocations, then reading callphys.def file.
--> added precompiling flags around lines that are both useless for MESOSCALE (notably I/O) and recently adapted to parallel computations in the GCM
--> tidied up what is MESOSCALE vs. GCM in surfini

Changes in MESOSCALE

--> changed makemeso to allow dynamically set nx ny nprocs
--> changed makemeso to remove links to Fortran code adapted to parallel GCM and useless for mesoscale
--> changed ngridmx to ngrid in inifis includes

  • Property svn:executable set to *
File size: 3.5 KB
Line 
1!=======================================================================
2! THERMCELL_DQUP
3!=======================================================================
4!
5!   Compute the thermals contribution of explicit thermals
6!   to vertical transport in the PBL.
7!   dq is computed once upward, entrainment and detrainment mass fluxes
8!   are known.
9!
10!   Version with sub-timestep for Martian thin layers
11!
12!=======================================================================
13! Author : A. Colaitis 2011-01-05 (with updates 2011-2013)
14! Institution : Laboratoire de Meteorologie Dynamique (LMD) Paris, France
15! -----------------------------------------------------------------------
16! Corresponding author : A. Spiga aymeric.spiga_AT_upmc.fr
17! -----------------------------------------------------------------------
18! Reference paper:
19! A. Colaïtis, A. Spiga, F. Hourdin, C. Rio, F. Forget, and E. Millour.
20! A thermal plume model for the Martian convective boundary layer.
21! Journal of Geophysical Research (Planets), 118:1468-1487, July 2013.
22! http://dx.doi.org/10.1002/jgre.20104
23! http://arxiv.org/abs/1306.6215
24! -----------------------------------------------------------------------
25
26      subroutine thermcell_dqup(ngrid,nlayer,ptimestep,fm,entr,detr,  &
27     &    masse0,q_therm,dq_therm,ndt,limz)
28      implicit none
29
30! ============================ INPUTS ============================
31
32      INTEGER, INTENT(IN) :: ngrid,nlayer ! number of grid points and number of levels
33      REAL, INTENT(IN) :: ptimestep ! timestep (s)
34      REAL, INTENT(IN) :: fm(ngrid,nlayer+1) ! upward mass flux
35      REAL, INTENT(IN) :: entr(ngrid,nlayer) ! entrainment mass flux
36      REAL, INTENT(IN) :: detr(ngrid,nlayer) ! detrainment mass flux
37      REAL, INTENT(IN) :: q_therm(ngrid,nlayer) ! initial profil of q
38      REAL, INTENT(IN) :: masse0(ngrid,nlayer) ! mass of cells
39      INTEGER, INTENT(IN) :: ndt ! number of subtimesteps
40      INTEGER, INTENT(IN) :: limz ! index of maximum layer
41
42! ============================ OUTPUTS ===========================
43
44      REAL, INTENT(OUT) :: dq_therm(ngrid,nlayer)  ! dq/dt -> derivative
45
46! ============================ LOCAL =============================
47
48      REAL q(ngrid,nlayer)
49      REAL qa(ngrid,nlayer)
50      INTEGER ig,k,i
51      REAL invflux0(ngrid,nlayer)
52      REAL ztimestep
53
54! =========== Init ==============================================
55
56      qa(:,:)=q_therm(:,:) !q profile in the updraft
57      q(:,:)=q_therm(:,:) !mean q profile
58
59! ====== Computing q ============================================
60! Based on equation 14 in appendix 4.2
61
62      dq_therm(:,:)=0.
63      ztimestep=ptimestep/real(ndt)
64      invflux0(:,:)=ztimestep/masse0(:,:)     
65
66      do i=1,ndt !subtimestep loop
67
68        do ig=1,ngrid
69           qa(ig,1)=q(ig,1)
70       enddo
71
72        do k=2,limz
73           do ig=1,ngrid
74              if ((fm(ig,k+1)+detr(ig,k))*ptimestep.gt.  &
75     &        1.e-5*masse0(ig,k)) then
76                 qa(ig,k)=(fm(ig,k)*qa(ig,k-1)+entr(ig,k)*q(ig,k))  &
77     &           /(fm(ig,k+1)+detr(ig,k))
78              else
79                 qa(ig,k)=q(ig,k)
80              endif
81           enddo
82        enddo
83
84        do k=1,limz
85          q(:,k)=q(:,k)+         &
86     &    (detr(:,k)*qa(:,k)-entr(:,k)*q(:,k) &
87     &    -fm(:,k)*q(:,k)+fm(:,k+1)*q(:,k+1))  &
88     &    *invflux0(:,k)
89        enddo
90
91      enddo !of do i=1,ndt
92
93! ====== Derivative ==============================================
94
95         do k=1,limz
96          dq_therm(:,k)=(q(:,k)-q_therm(:,k))/ptimestep
97         enddo
98
99! ==============
100
101      return
102      end
103
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