- Timestamp:
- 2020-12-02T20:53:00+01:00 (3 years ago)
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NEMO/branches/2020/dev_r13648_ASINTER-04_laurent_bulk_ice/src/ICE/iceitd.F90
r13618 r14021 18 18 !!---------------------------------------------------------------------- 19 19 USE dom_oce ! ocean domain 20 USE phycst ! physical constants 20 USE phycst ! physical constants 21 21 USE ice1D ! sea-ice: thermodynamic variables 22 22 USE ice ! sea-ice: variables … … 29 29 USE lib_fortran ! fortran utilities (glob_sum + no signed zero) 30 30 USE prtctl ! Print control 31 USE timing ! Timing 31 32 32 33 IMPLICIT NONE … … 65 66 !! after thermodynamic growth of ice thickness 66 67 !! 67 !! ** Method : Linear remapping 68 !! ** Method : Linear remapping 68 69 !! 69 70 !! References : W.H. Lipscomb, JGR 2001 70 71 !!------------------------------------------------------------------ 71 INTEGER , INTENT (in) :: kt ! Ocean time step 72 INTEGER , INTENT (in) :: kt ! Ocean time step 72 73 ! 73 74 INTEGER :: ji, jj, jl, jcat ! dummy loop index … … 75 76 REAL(wp) :: zx1, zwk1, zdh0, zetamin, zdamax ! local scalars 76 77 REAL(wp) :: zx2, zwk2, zda0, zetamax ! - - 77 REAL(wp) :: zx3 78 REAL(wp) :: zx3 78 79 REAL(wp) :: zslope ! used to compute local thermodynamic "speeds" 79 80 ! … … 87 88 REAL(wp), DIMENSION(jpij,0:jpl) :: zhbnew ! new boundaries of ice categories 88 89 !!------------------------------------------------------------------ 89 90 IF( kt == nit000 .AND. lwp ) WRITE(numout,*) '-- ice_itd_rem: remapping ice thickness distribution' 90 IF( ln_timing ) CALL timing_start('iceitd_rem') 91 92 IF( kt == nit000 .AND. lwp ) WRITE(numout,*) '-- ice_itd_rem: remapping ice thickness distribution' 91 93 92 94 IF( ln_icediachk ) CALL ice_cons_hsm(0, 'iceitd_rem', rdiag_v, rdiag_s, rdiag_t, rdiag_fv, rdiag_fs, rdiag_ft) … … 105 107 ENDIF 106 108 END_2D 107 109 108 110 !----------------------------------------------------------------------------------------------- 109 111 ! 2) Compute new category boundaries … … 141 143 ELSEIF( a_ib_2d(ji,jl) <= epsi10 .AND. a_ib_2d(ji,jl+1) > epsi10 ) THEN ! a(jl)=0 => Hn* = Hn + fn+1*dt 142 144 zhbnew(ji,jl) = hi_max(jl) + zdhice(ji,jl+1) 143 ELSE ! a(jl+1) & a(jl) = 0 145 ELSE ! a(jl+1) & a(jl) = 0 144 146 zhbnew(ji,jl) = hi_max(jl) 145 147 ENDIF 146 148 ! 147 149 ! --- 2 conditions for remapping --- ! 148 ! 1) hn(t+1)+espi < Hn* < hn+1(t+1)-epsi 149 ! Note: hn(t+1) must not be too close to either HR or HL otherwise a division by nearly 0 is possible 150 ! 1) hn(t+1)+espi < Hn* < hn+1(t+1)-epsi 151 ! Note: hn(t+1) must not be too close to either HR or HL otherwise a division by nearly 0 is possible 150 152 ! in itd_glinear in the case (HR-HL) = 3(Hice - HL) or = 3(HR - Hice) 151 153 # if defined key_single … … 157 159 # endif 158 160 ! 159 ! 2) Hn-1 < Hn* < Hn+1 161 ! 2) Hn-1 < Hn* < Hn+1 160 162 IF( zhbnew(ji,jl) < hi_max(jl-1) ) nptidx(ji) = 0 161 163 IF( zhbnew(ji,jl) > hi_max(jl+1) ) nptidx(ji) = 0 … … 169 171 zhbnew(ji,jpl) = MAX( hi_max(jpl-1), 3._wp * h_i_2d(ji,jpl) - 2._wp * zhbnew(ji,jpl-1) ) 170 172 ELSE 171 zhbnew(ji,jpl) = hi_max(jpl) 173 zhbnew(ji,jpl) = hi_max(jpl) 172 174 ENDIF 173 175 ! 174 176 ! --- 1 additional condition for remapping (1st category) --- ! 175 ! H0+epsi < h1(t) < H1-epsi 176 ! h1(t) must not be too close to either HR or HL otherwise a division by nearly 0 is possible 177 ! H0+epsi < h1(t) < H1-epsi 178 ! h1(t) must not be too close to either HR or HL otherwise a division by nearly 0 is possible 177 179 ! in itd_glinear in the case (HR-HL) = 3(Hice - HL) or = 3(HR - Hice) 178 180 # if defined key_single … … 200 202 ! 201 203 ENDIF 202 204 203 205 !----------------------------------------------------------------------------------------------- 204 ! 4) Compute g(h) 206 ! 4) Compute g(h) 205 207 !----------------------------------------------------------------------------------------------- 206 208 IF( npti > 0 ) THEN 207 209 ! 208 210 zhb0(:) = hi_max(0) ; zhb1(:) = hi_max(1) 209 g0(:,:) = 0._wp ; g1(:,:) = 0._wp 210 hL(:,:) = 0._wp ; hR(:,:) = 0._wp 211 g0(:,:) = 0._wp ; g1(:,:) = 0._wp 212 hL(:,:) = 0._wp ; hR(:,:) = 0._wp 211 213 ! 212 214 DO jl = 1, jpl … … 218 220 ! 219 221 IF( jl == 1 ) THEN 220 ! 222 ! 221 223 ! --- g(h) for category 1 --- ! 222 224 CALL itd_glinear( zhb0(1:npti) , zhb1(1:npti) , h_ib_1d(1:npti) , a_i_1d(1:npti) , & ! in … … 228 230 IF( a_i_1d(ji) > epsi10 ) THEN 229 231 ! 230 zdh0 = h_i_1d(ji) - h_ib_1d(ji) 232 zdh0 = h_i_1d(ji) - h_ib_1d(ji) 231 233 IF( zdh0 < 0.0 ) THEN ! remove area from category 1 232 234 zdh0 = MIN( -zdh0, hi_max(1) ) … … 236 238 IF( zetamax > 0.0 ) THEN 237 239 zx1 = zetamax 238 zx2 = 0.5 * zetamax * zetamax 240 zx2 = 0.5 * zetamax * zetamax 239 241 zda0 = g1(ji,1) * zx2 + g0(ji,1) * zx1 ! ice area removed 240 zdamax = a_i_1d(ji) * (1.0 - h_i_1d(ji) / h_ib_1d(ji) ) ! Constrain new thickness <= h_i 242 zdamax = a_i_1d(ji) * (1.0 - h_i_1d(ji) / h_ib_1d(ji) ) ! Constrain new thickness <= h_i 241 243 zda0 = MIN( zda0, zdamax ) ! ice area lost due to melting of thin ice (zdamax > 0) 242 244 ! Remove area, conserving volume … … 248 250 ELSE ! if ice accretion zdh0 > 0 249 251 ! zhbnew was 0, and is shifted to the right to account for thin ice growth in openwater (F0 = f1) 250 zhbnew(ji,0) = MIN( zdh0, hi_max(1) ) 252 zhbnew(ji,0) = MIN( zdh0, hi_max(1) ) 251 253 ENDIF 252 254 ! … … 261 263 ENDIF ! jl=1 262 264 ! 263 ! --- g(h) for each thickness category --- ! 265 ! --- g(h) for each thickness category --- ! 264 266 CALL itd_glinear( zhbnew(1:npti,jl-1), zhbnew(1:npti,jl), h_i_1d(1:npti) , a_i_1d(1:npti) , & ! in 265 267 & g0 (1:npti,jl ), g1 (1:npti,jl), hL (1:npti,jl), hR (1:npti,jl) ) ! out 266 268 ! 267 269 END DO 268 270 269 271 !----------------------------------------------------------------------------------------------- 270 272 ! 5) Compute area and volume to be shifted across each boundary (Eq. 18) … … 276 278 ! left and right integration limits in eta space 277 279 IF (zhbnew(ji,jl) > hi_max(jl)) THEN ! Hn* > Hn => transfer from jl to jl+1 278 zetamin = MAX( hi_max(jl) , hL(ji,jl) ) - hL(ji,jl) ! hi_max(jl) - hL 280 zetamin = MAX( hi_max(jl) , hL(ji,jl) ) - hL(ji,jl) ! hi_max(jl) - hL 279 281 zetamax = MIN( zhbnew(ji,jl), hR(ji,jl) ) - hL(ji,jl) ! hR - hL 280 282 jdonor(ji,jl) = jl … … 299 301 END DO 300 302 END DO 301 303 302 304 !---------------------------------------------------------------------------------------------- 303 305 ! 6) Shift ice between categories 304 306 !---------------------------------------------------------------------------------------------- 305 307 CALL itd_shiftice ( jdonor(1:npti,:), zdaice(1:npti,:), zdvice(1:npti,:) ) 306 308 307 309 !---------------------------------------------------------------------------------------------- 308 310 ! 7) Make sure h_i >= minimum ice thickness hi_min … … 314 316 DO ji = 1, npti 315 317 IF ( a_i_1d(ji) > epsi10 .AND. h_i_1d(ji) < rn_himin ) THEN 316 a_i_1d(ji) = a_i_1d(ji) * h_i_1d(ji) / rn_himin 317 IF( ln_pnd_LEV ) a_ip_1d(ji) = a_ip_1d(ji) * h_i_1d(ji) / rn_himin318 a_i_1d(ji) = a_i_1d(ji) * h_i_1d(ji) / rn_himin 319 IF( ln_pnd_LEV .OR. ln_pnd_TOPO ) a_ip_1d(ji) = a_ip_1d(ji) * h_i_1d(ji) / rn_himin 318 320 h_i_1d(ji) = rn_himin 319 321 ENDIF … … 328 330 IF( ln_icediachk ) CALL ice_cons_hsm(1, 'iceitd_rem', rdiag_v, rdiag_s, rdiag_t, rdiag_fv, rdiag_fs, rdiag_ft) 329 331 IF( ln_icediachk ) CALL ice_cons2D (1, 'iceitd_rem', diag_v, diag_s, diag_t, diag_fv, diag_fs, diag_ft) 332 IF( ln_timing ) CALL timing_stop ('iceitd_rem') 330 333 ! 331 334 END SUBROUTINE ice_itd_rem … … 381 384 pg1(ji) = 2._wp * zdhr * zwk1 * ( zwk2 - 0.5_wp ) ! Eq. 14 382 385 ! 383 ELSE ! remap_flag = .false. or a_i < epsi10 386 ELSE ! remap_flag = .false. or a_i < epsi10 384 387 phL(ji) = 0._wp 385 388 phR(ji) = 0._wp … … 412 415 REAL(wp), DIMENSION(jpij,nlay_s,jpl) :: ze_s_2d 413 416 !!------------------------------------------------------------------ 414 417 415 418 CALL tab_3d_2d( npti, nptidx(1:npti), h_i_2d (1:npti,1:jpl), h_i ) 416 419 CALL tab_3d_2d( npti, nptidx(1:npti), a_i_2d (1:npti,1:jpl), a_i ) … … 442 445 END DO 443 446 END DO 444 447 445 448 !------------------------------------------------------------------------------- 446 449 ! 2) Transfer volume and energy between categories … … 454 457 ! 455 458 IF ( jl1 == jl ) THEN ; jl2 = jl1+1 456 ELSE ; jl2 = jl 459 ELSE ; jl2 = jl 457 460 ENDIF 458 461 ! … … 472 475 ztrans = v_s_2d(ji,jl1) * zworkv(ji) ! Snow volumes 473 476 v_s_2d(ji,jl1) = v_s_2d(ji,jl1) - ztrans 474 v_s_2d(ji,jl2) = v_s_2d(ji,jl2) + ztrans 477 v_s_2d(ji,jl2) = v_s_2d(ji,jl2) + ztrans 475 478 ! 476 479 ztrans = oa_i_2d(ji,jl1) * zworka(ji) ! Ice age … … 485 488 zaTsfn(ji,jl1) = zaTsfn(ji,jl1) - ztrans 486 489 zaTsfn(ji,jl2) = zaTsfn(ji,jl2) + ztrans 487 ! 488 IF ( ln_pnd_LEV ) THEN490 ! 491 IF ( ln_pnd_LEV .OR. ln_pnd_TOPO ) THEN 489 492 ztrans = a_ip_2d(ji,jl1) * zworka(ji) ! Pond fraction 490 493 a_ip_2d(ji,jl1) = a_ip_2d(ji,jl1) - ztrans 491 494 a_ip_2d(ji,jl2) = a_ip_2d(ji,jl2) + ztrans 492 ! 493 ztrans = v_ip_2d(ji,jl1) * zwork a(ji) ! Pond volume (also proportional to da/a)495 ! 496 ztrans = v_ip_2d(ji,jl1) * zworkv(ji) ! Pond volume 494 497 v_ip_2d(ji,jl1) = v_ip_2d(ji,jl1) - ztrans 495 498 v_ip_2d(ji,jl2) = v_ip_2d(ji,jl2) + ztrans 496 499 ! 497 500 IF ( ln_pnd_lids ) THEN ! Pond lid volume 498 ztrans = v_il_2d(ji,jl1) * zwork a(ji)501 ztrans = v_il_2d(ji,jl1) * zworkv(ji) 499 502 v_il_2d(ji,jl1) = v_il_2d(ji,jl1) - ztrans 500 503 v_il_2d(ji,jl2) = v_il_2d(ji,jl2) + ztrans … … 552 555 & a_i_2d(1:npti,jl) = a_i_2d(1:npti,jl) * rn_amax_1d(1:npti) / zworka(1:npti) 553 556 END DO 554 557 555 558 !------------------------------------------------------------------------------- 556 559 ! 4) Update ice thickness and temperature … … 561 564 WHERE( a_i_2d(1:npti,:) >= epsi20 ) 562 565 # endif 563 h_i_2d (1:npti,:) = v_i_2d(1:npti,:) / a_i_2d(1:npti,:) 564 t_su_2d(1:npti,:) = zaTsfn(1:npti,:) / a_i_2d(1:npti,:) 566 h_i_2d (1:npti,:) = v_i_2d(1:npti,:) / a_i_2d(1:npti,:) 567 t_su_2d(1:npti,:) = zaTsfn(1:npti,:) / a_i_2d(1:npti,:) 565 568 ELSEWHERE 566 569 h_i_2d (1:npti,:) = 0._wp … … 588 591 ! 589 592 END SUBROUTINE itd_shiftice 590 593 591 594 592 595 SUBROUTINE ice_itd_reb( kt ) … … 600 603 !! to the neighboring category 601 604 !!------------------------------------------------------------------ 602 INTEGER , INTENT (in) :: kt ! Ocean time step 605 INTEGER , INTENT (in) :: kt ! Ocean time step 603 606 INTEGER :: ji, jj, jl ! dummy loop indices 604 607 ! … … 606 609 REAL(wp), DIMENSION(jpij,jpl-1) :: zdaice, zdvice ! ice area and volume transferred 607 610 !!------------------------------------------------------------------ 608 ! 609 IF( kt == nit000 .AND. lwp ) WRITE(numout,*) '-- ice_itd_reb: rebining ice thickness distribution' 611 IF( ln_timing ) CALL timing_start('iceitd_reb') 612 ! 613 IF( kt == nit000 .AND. lwp ) WRITE(numout,*) '-- ice_itd_reb: rebining ice thickness distribution' 610 614 ! 611 615 IF( ln_icediachk ) CALL ice_cons_hsm(0, 'iceitd_reb', rdiag_v, rdiag_s, rdiag_t, rdiag_fv, rdiag_fs, rdiag_ft) … … 623 627 IF( a_i(ji,jj,jl) > 0._wp .AND. v_i(ji,jj,jl) > (a_i(ji,jj,jl) * hi_max(jl)) ) THEN 624 628 npti = npti + 1 625 nptidx( npti ) = (jj - 1) * jpi + ji 629 nptidx( npti ) = (jj - 1) * jpi + ji 626 630 ENDIF 627 631 END_2D 628 632 ! 629 IF( npti > 0 ) THEN 633 IF( npti > 0 ) THEN 630 634 !!clem CALL tab_2d_1d( npti, nptidx(1:npti), h_i_1d(1:npti), h_i(:,:,jl) ) 631 635 CALL tab_2d_1d( npti, nptidx(1:npti), a_i_1d(1:npti), a_i(:,:,jl) ) … … 633 637 ! 634 638 DO ji = 1, npti 635 jdonor(ji,jl) = jl 639 jdonor(ji,jl) = jl 636 640 ! how much of a_i you send in cat sup is somewhat arbitrary 637 !!clem: these do not work properly after a restart (I do not know why) => not sure it is still true 638 !! zdaice(ji,jl) = a_i_1d(ji) * ( h_i_1d(ji) - hi_max(jl) + epsi10 ) / h_i_1d(ji) 639 !! zdvice(ji,jl) = v_i_1d(ji) - ( a_i_1d(ji) - zdaice(ji,jl) ) * ( hi_max(jl) - epsi10 ) 640 !!clem: these do not work properly after a restart (I do not know why) => not sure it is still true 641 !! zdaice(ji,jl) = a_i_1d(ji) 642 !! zdvice(ji,jl) = v_i_1d(ji) 643 !!clem: these are from UCL and work ok 644 zdaice(ji,jl) = a_i_1d(ji) * 0.5_wp 645 zdvice(ji,jl) = v_i_1d(ji) - zdaice(ji,jl) * ( hi_max(jl) + hi_max(jl-1) ) * 0.5_wp 641 ! these are from CICE => transfer everything 642 !!zdaice(ji,jl) = a_i_1d(ji) 643 !!zdvice(ji,jl) = v_i_1d(ji) 644 ! these are from LLN => transfer only half of the category 645 zdaice(ji,jl) = 0.5_wp * a_i_1d(ji) 646 zdvice(ji,jl) = v_i_1d(ji) - (1._wp - 0.5_wp) * a_i_1d(ji) * hi_mean(jl) 646 647 END DO 647 648 ! … … 662 663 IF( a_i(ji,jj,jl+1) > 0._wp .AND. v_i(ji,jj,jl+1) <= (a_i(ji,jj,jl+1) * hi_max(jl)) ) THEN 663 664 npti = npti + 1 664 nptidx( npti ) = (jj - 1) * jpi + ji 665 nptidx( npti ) = (jj - 1) * jpi + ji 665 666 ENDIF 666 667 END_2D … … 671 672 DO ji = 1, npti 672 673 jdonor(ji,jl) = jl + 1 673 zdaice(ji,jl) = a_i_1d(ji) 674 zdaice(ji,jl) = a_i_1d(ji) 674 675 zdvice(ji,jl) = v_i_1d(ji) 675 676 END DO … … 686 687 IF( ln_icediachk ) CALL ice_cons_hsm(1, 'iceitd_reb', rdiag_v, rdiag_s, rdiag_t, rdiag_fv, rdiag_fs, rdiag_ft) 687 688 IF( ln_icediachk ) CALL ice_cons2D (1, 'iceitd_reb', diag_v, diag_s, diag_t, diag_fv, diag_fs, diag_ft) 689 IF( ln_timing ) CALL timing_stop ('iceitd_reb') 688 690 ! 689 691 END SUBROUTINE ice_itd_reb … … 719 721 WRITE(numout,*) ' mean ice thickness in the domain rn_himean = ', rn_himean 720 722 WRITE(numout,*) ' Ice categories are defined by rn_catbnd ln_cat_usr = ', ln_cat_usr 721 WRITE(numout,*) ' minimum ice thickness allowed rn_himin = ', rn_himin 722 WRITE(numout,*) ' maximum ice thickness allowed rn_himax = ', rn_himax 723 WRITE(numout,*) ' minimum ice thickness allowed rn_himin = ', rn_himin 724 WRITE(numout,*) ' maximum ice thickness allowed rn_himax = ', rn_himax 723 725 ENDIF 724 726 ! … … 727 729 !-----------------------------------! 728 730 ! !== set the choice of ice categories ==! 729 ioptio = 0 731 ioptio = 0 730 732 IF( ln_cat_hfn ) THEN ; ioptio = ioptio + 1 ; nice_catbnd = np_cathfn ; ENDIF 731 733 IF( ln_cat_usr ) THEN ; ioptio = ioptio + 1 ; nice_catbnd = np_catusr ; ENDIF
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