#if ( RWORDSIZE == 4 ) # define VREC vsrec # define VSQRT vssqrt #else # define VREC vrec # define VSQRT vsqrt #endif MODULE module_mp_wsm6 ! ! REAL, PARAMETER, PRIVATE :: dtcldcr = 120. REAL, PARAMETER, PRIVATE :: n0r = 8.e6 REAL, PARAMETER, PRIVATE :: n0g = 4.e6 REAL, PARAMETER, PRIVATE :: avtr = 841.9 REAL, PARAMETER, PRIVATE :: bvtr = 0.8 REAL, PARAMETER, PRIVATE :: r0 = .8e-5 ! 8 microm in contrast to 10 micro m REAL, PARAMETER, PRIVATE :: peaut = .55 ! collection efficiency REAL, PARAMETER, PRIVATE :: xncr = 3.e8 ! maritime cloud in contrast to 3.e8 in tc80 REAL, PARAMETER, PRIVATE :: xmyu = 1.718e-5 ! the dynamic viscosity kgm-1s-1 REAL, PARAMETER, PRIVATE :: avts = 11.72 REAL, PARAMETER, PRIVATE :: bvts = .41 REAL, PARAMETER, PRIVATE :: avtg = 330. REAL, PARAMETER, PRIVATE :: bvtg = 0.8 REAL, PARAMETER, PRIVATE :: deng = 500. REAL, PARAMETER, PRIVATE :: n0smax = 1.e11 ! t=-90C unlimited REAL, PARAMETER, PRIVATE :: lamdarmax = 8.e4 REAL, PARAMETER, PRIVATE :: lamdasmax = 1.e5 REAL, PARAMETER, PRIVATE :: lamdagmax = 6.e4 REAL, PARAMETER, PRIVATE :: betai = .6 REAL, PARAMETER, PRIVATE :: xn0 = 1.e-2 REAL, PARAMETER, PRIVATE :: dicon = 11.9 REAL, PARAMETER, PRIVATE :: di0 = 12.9e-6 REAL, PARAMETER, PRIVATE :: dimax = 500.e-6 REAL, PARAMETER, PRIVATE :: n0s = 2.e6 ! temperature dependent n0s REAL, PARAMETER, PRIVATE :: alpha = .12 ! .122 exponen factor for n0s REAL, PARAMETER, PRIVATE :: pfrz1 = 100. REAL, PARAMETER, PRIVATE :: pfrz2 = 0.66 REAL, PARAMETER, PRIVATE :: qcrmin = 1.e-9 REAL, PARAMETER, PRIVATE :: t40c = 233.16 REAL, PARAMETER, PRIVATE :: eacrc = 1.0 REAL, PARAMETER, PRIVATE :: dens = 100.0 REAL, PARAMETER, PRIVATE :: qs0 = 6.e-4 ! pgaut REAL, SAVE :: & qc0, qck1,bvtr1,bvtr2,bvtr3,bvtr4,g1pbr,& g3pbr,g4pbr,g5pbro2,pvtr,eacrr,pacrr, & bvtr6,g6pbr, & precr1,precr2,xm0,xmmax,roqimax,bvts1, & bvts2,bvts3,bvts4,g1pbs,g3pbs,g4pbs, & g5pbso2,pvts,pacrs,precs1,precs2,pidn0r,& pidn0s,xlv1,pacrc, & bvtg1,bvtg2,bvtg3,bvtg4,g1pbg, & g3pbg,g4pbg,g5pbgo2,pvtg,pacrg, & precg1,precg2,pidn0g, & rslopermax,rslopesmax,rslopegmax, & rsloperbmax,rslopesbmax,rslopegbmax, & rsloper2max,rslopes2max,rslopeg2max, & rsloper3max,rslopes3max,rslopeg3max CONTAINS !=================================================================== ! SUBROUTINE wsm6(th, q, qc, qr, qi, qs, qg & ,den, pii, p, delz & ,delt,g, cpd, cpv, rd, rv, t0c & ,ep1, ep2, qmin & ,XLS, XLV0, XLF0, den0, denr & ,cliq,cice,psat & ,rain, rainncv & ,snow, snowncv & ,graupel, graupelncv & ,sr & ,ids,ide, jds,jde, kds,kde & ,ims,ime, jms,jme, kms,kme & ,its,ite, jts,jte, kts,kte & ) !------------------------------------------------------------------- IMPLICIT NONE !------------------------------------------------------------------- ! ! This code is a 6-class GRAUPEL phase microphyiscs scheme (WSM6) of the WRF ! Single-Moment MicroPhyiscs (WSMMP). The WSMMP assumes that ice nuclei ! number concentration is a function of temperature, and seperate assumption ! is developed, in which ice crystal number concentration is a function ! of ice amount. A theoretical background of the ice-microphysics and related ! processes in the WSMMPs are described in Hong et al. (2004). ! All production terms in the WSM6 scheme are described in Hong and Lim (2006). ! All units are in m.k.s. and source/sink terms in kgkg-1s-1. ! ! WSM6 cloud scheme ! ! Coded by Song-You Hong and Jeong-Ock Jade Lim (Yonsei Univ.) ! Summer 2003 ! ! Implemented by Song-You Hong (Yonsei Univ.) and Jimy Dudhia (NCAR) ! Summer 2004 ! ! Reference) Hong, Dudhia, Chen (HDC, 2004) Mon. Wea. Rev. ! Hong and Lim (HL, 2006) J. Korean Meteor. Soc. ! Lin, Farley, Orville (LFO, 1983) J. Appl. Meteor. ! Rutledge, Hobbs (RH83, 1983) J. Atmos. Sci. ! Rutledge, Hobbs (RH84, 1984) J. Atmos. Sci. ! INTEGER, INTENT(IN ) :: ids,ide, jds,jde, kds,kde , & ims,ime, jms,jme, kms,kme , & its,ite, jts,jte, kts,kte REAL, DIMENSION( ims:ime , kms:kme , jms:jme ), & INTENT(INOUT) :: & th, & q, & qc, & qi, & qr, & qs, & qg REAL, DIMENSION( ims:ime , kms:kme , jms:jme ), & INTENT(IN ) :: & den, & pii, & p, & delz REAL, INTENT(IN ) :: delt, & g, & rd, & rv, & t0c, & den0, & cpd, & cpv, & ep1, & ep2, & qmin, & XLS, & XLV0, & XLF0, & cliq, & cice, & psat, & denr REAL, DIMENSION( ims:ime , jms:jme ), & INTENT(INOUT) :: rain, & rainncv, & sr REAL, DIMENSION( ims:ime , jms:jme ), OPTIONAL, & INTENT(INOUT) :: snow, & snowncv REAL, DIMENSION( ims:ime , jms:jme ), OPTIONAL, & INTENT(INOUT) :: graupel, & graupelncv ! LOCAL VAR REAL, DIMENSION( its:ite , kts:kte ) :: t REAL, DIMENSION( its:ite , kts:kte, 2 ) :: qci REAL, DIMENSION( its:ite , kts:kte, 3 ) :: qrs INTEGER :: i,j,k !------------------------------------------------------------------- DO j=jts,jte DO k=kts,kte DO i=its,ite t(i,k)=th(i,k,j)*pii(i,k,j) qci(i,k,1) = qc(i,k,j) qci(i,k,2) = qi(i,k,j) qrs(i,k,1) = qr(i,k,j) qrs(i,k,2) = qs(i,k,j) qrs(i,k,3) = qg(i,k,j) ENDDO ENDDO CALL wsm62D(t, q(ims,kms,j), qci, qrs & ,den(ims,kms,j) & ,p(ims,kms,j), delz(ims,kms,j) & ,delt,g, cpd, cpv, rd, rv, t0c & ,ep1, ep2, qmin & ,XLS, XLV0, XLF0, den0, denr & ,cliq,cice,psat & ,j & ,rain(ims,j),rainncv(ims,j) & ,sr(ims,j) & ,ids,ide, jds,jde, kds,kde & ,ims,ime, jms,jme, kms,kme & ,its,ite, jts,jte, kts,kte & ,snow(ims,j),snowncv(ims,j) & ,graupel(ims,j),graupelncv(ims,j) & ) DO K=kts,kte DO I=its,ite th(i,k,j)=t(i,k)/pii(i,k,j) qc(i,k,j) = qci(i,k,1) qi(i,k,j) = qci(i,k,2) qr(i,k,j) = qrs(i,k,1) qs(i,k,j) = qrs(i,k,2) qg(i,k,j) = qrs(i,k,3) ENDDO ENDDO ENDDO END SUBROUTINE wsm6 !=================================================================== ! SUBROUTINE wsm62D(t, q, qci, qrs, den, p, delz & ,delt,g, cpd, cpv, rd, rv, t0c & ,ep1, ep2, qmin & ,XLS, XLV0, XLF0, den0, denr & ,cliq,cice,psat & ,lat & ,rain,rainncv & ,sr & ,ids,ide, jds,jde, kds,kde & ,ims,ime, jms,jme, kms,kme & ,its,ite, jts,jte, kts,kte & ,snow,snowncv & ,graupel,graupelncv & ) !------------------------------------------------------------------- IMPLICIT NONE !------------------------------------------------------------------- INTEGER, INTENT(IN ) :: ids,ide, jds,jde, kds,kde , & ims,ime, jms,jme, kms,kme , & its,ite, jts,jte, kts,kte, & lat REAL, DIMENSION( its:ite , kts:kte ), & INTENT(INOUT) :: & t REAL, DIMENSION( its:ite , kts:kte, 2 ), & INTENT(INOUT) :: & qci REAL, DIMENSION( its:ite , kts:kte, 3 ), & INTENT(INOUT) :: & qrs REAL, DIMENSION( ims:ime , kms:kme ), & INTENT(INOUT) :: & q REAL, DIMENSION( ims:ime , kms:kme ), & INTENT(IN ) :: & den, & p, & delz REAL, INTENT(IN ) :: delt, & g, & cpd, & cpv, & t0c, & den0, & rd, & rv, & ep1, & ep2, & qmin, & XLS, & XLV0, & XLF0, & cliq, & cice, & psat, & denr REAL, DIMENSION( ims:ime ), & INTENT(INOUT) :: rain, & rainncv, & sr REAL, DIMENSION( ims:ime ), OPTIONAL, & INTENT(INOUT) :: snow, & snowncv REAL, DIMENSION( ims:ime ), OPTIONAL, & INTENT(INOUT) :: graupel, & graupelncv ! LOCAL VAR REAL, DIMENSION( its:ite , kts:kte , 3) :: & rh, qs, rslope, rslope2, rslope3, rslopeb, & falk, fall, work1 REAL, DIMENSION( its:ite , kts:kte ) :: & falkc, work1c, work2c, fallc REAL, DIMENSION( its:ite , kts:kte) :: & prevp, psdep, pgdep, praut, psaut, pgaut, & pracw, psacw, pgacw, pgacr, pgacs, psaci, pgmlt, praci, & piacr, pracs, psacr, pgaci, pseml, pgeml REAL, DIMENSION( its:ite , kts:kte ) :: & pigen, pidep, pcond, xl, cpm, work2, psmlt, psevp, denfac, & xni, pgevp,n0sfac ! variables for optimization REAL, DIMENSION( its:ite ) :: tvec1 REAL :: temp INTEGER, DIMENSION( its:ite ) :: mstep, numdt LOGICAL, DIMENSION( its:ite ) :: flgcld REAL :: pi, & cpmcal, xlcal, lamdar, lamdas, lamdag, diffus, & viscos, xka, venfac, conden, diffac, & x, y, z, a, b, c, d, e, & qdt, holdrr, holdrs, holdrg, supcol, pvt, & coeres, supsat, dtcld, xmi, eacrs, satdt, & qimax, diameter, xni0, roqi0, & fallsum, fallsum_qsi, fallsum_qg, & vt2i,vt2r,vt2s,vt2g,acrfac,egs,egi, & xlwork2, factor, source, value, & xlf, pfrzdtc, pfrzdtr, supice, alpha2, delta2, delta3 REAL :: holdc, holdci INTEGER :: i, j, k, mstepmax, & iprt, latd, lond, loop, loops, ifsat, n ! Temporaries used for inlining fpvs function REAL :: dldti, xb, xai, tr, xbi, xa, hvap, cvap, hsub, dldt, ttp ! !================================================================= ! compute internal functions ! cpmcal(x) = cpd*(1.-max(x,qmin))+max(x,qmin)*cpv xlcal(x) = xlv0-xlv1*(x-t0c) !---------------------------------------------------------------- ! size distributions: (x=mixing ratio, y=air density): ! valid for mixing ratio > 1.e-9 kg/kg. ! ! Optimizatin : A**B => exp(log(A)*(B)) lamdar(x,y)= sqrt(sqrt(pidn0r/(x*y))) ! (pidn0r/(x*y))**.25 lamdas(x,y,z)= sqrt(sqrt(pidn0s*z/(x*y))) ! (pidn0s*z/(x*y))**.25 lamdag(x,y)= sqrt(sqrt(pidn0g/(x*y))) ! (pidn0g/(x*y))**.25 ! !---------------------------------------------------------------- ! diffus: diffusion coefficient of the water vapor ! viscos: kinematic viscosity(m2s-1) ! diffus(x,y) = 8.794e-5 * exp(log(x)*(1.81)) / y ! 8.794e-5*x**1.81/y viscos(x,y) = 1.496e-6 * (x*sqrt(x)) /(x+120.)/y ! 1.496e-6*x**1.5/(x+120.)/y xka(x,y) = 1.414e3*viscos(x,y)*y diffac(a,b,c,d,e) = d*a*a/(xka(c,d)*rv*c*c)+1./(e*diffus(c,b)) venfac(a,b,c) = exp(log((viscos(b,c)/diffus(b,a)))*((.3333333))) & /sqrt(viscos(b,c))*sqrt(sqrt(den0/c)) conden(a,b,c,d,e) = (max(b,qmin)-c)/(1.+d*d/(rv*e)*c/(a*a)) ! pi = 4. * atan(1.) ! ! !---------------------------------------------------------------- ! paddint 0 for negative values generated by dynamics ! do k = kts, kte do i = its, ite qci(i,k,1) = max(qci(i,k,1),0.0) qrs(i,k,1) = max(qrs(i,k,1),0.0) qci(i,k,2) = max(qci(i,k,2),0.0) qrs(i,k,2) = max(qrs(i,k,2),0.0) qrs(i,k,3) = max(qrs(i,k,3),0.0) enddo enddo ! !---------------------------------------------------------------- ! latent heat for phase changes and heat capacity. neglect the ! changes during microphysical process calculation ! emanuel(1994) ! do k = kts, kte do i = its, ite cpm(i,k) = cpmcal(q(i,k)) xl(i,k) = xlcal(t(i,k)) enddo enddo ! !---------------------------------------------------------------- ! compute the minor time steps. ! loops = max(nint(delt/dtcldcr),1) dtcld = delt/loops if(delt.le.dtcldcr) dtcld = delt ! do loop = 1,loops ! !---------------------------------------------------------------- ! initialize the large scale variables ! do i = its, ite mstep(i) = 1 flgcld(i) = .true. enddo ! ! do k = kts, kte ! do i = its, ite ! denfac(i,k) = sqrt(den0/den(i,k)) ! enddo ! enddo do k = kts, kte CALL VREC( tvec1(its), den(its,k), ite-its+1) do i = its, ite tvec1(i) = tvec1(i)*den0 enddo CALL VSQRT( denfac(its,k), tvec1(its), ite-its+1) enddo ! ! Inline expansion for fpvs ! qs(i,k,1) = fpvs(t(i,k),0,rd,rv,cpv,cliq,cice,xlv0,xls,psat,t0c) ! qs(i,k,2) = fpvs(t(i,k),1,rd,rv,cpv,cliq,cice,xlv0,xls,psat,t0c) hsub = xls hvap = xlv0 cvap = cpv ttp=t0c+0.01 dldt=cvap-cliq xa=-dldt/rv xb=xa+hvap/(rv*ttp) dldti=cvap-cice xai=-dldti/rv xbi=xai+hsub/(rv*ttp) do k = kts, kte do i = its, ite tr=ttp/t(i,k) qs(i,k,1)=psat*exp(log(tr)*(xa))*exp(xb*(1.-tr)) qs(i,k,1) = ep2 * qs(i,k,1) / (p(i,k) - qs(i,k,1)) qs(i,k,1) = max(qs(i,k,1),qmin) rh(i,k,1) = max(q(i,k) / qs(i,k,1),qmin) tr=ttp/t(i,k) if(t(i,k).lt.ttp) then qs(i,k,2)=psat*exp(log(tr)*(xai))*exp(xbi*(1.-tr)) else qs(i,k,2)=psat*exp(log(tr)*(xa))*exp(xb*(1.-tr)) endif qs(i,k,2) = ep2 * qs(i,k,2) / (p(i,k) - qs(i,k,2)) qs(i,k,2) = max(qs(i,k,2),qmin) rh(i,k,2) = max(q(i,k) / qs(i,k,2),qmin) enddo enddo ! !---------------------------------------------------------------- ! initialize the variables for microphysical physics ! ! do k = kts, kte do i = its, ite prevp(i,k) = 0. psdep(i,k) = 0. pgdep(i,k) = 0. praut(i,k) = 0. psaut(i,k) = 0. pgaut(i,k) = 0. pracw(i,k) = 0. praci(i,k) = 0. piacr(i,k) = 0. psaci(i,k) = 0. psacw(i,k) = 0. pracs(i,k) = 0. psacr(i,k) = 0. pgacw(i,k) = 0. pgaci(i,k) = 0. pgacr(i,k) = 0. pgacs(i,k) = 0. pigen(i,k) = 0. pidep(i,k) = 0. pcond(i,k) = 0. psmlt(i,k) = 0. pgmlt(i,k) = 0. pseml(i,k) = 0. pgeml(i,k) = 0. psevp(i,k) = 0. pgevp(i,k) = 0. falk(i,k,1) = 0. falk(i,k,2) = 0. falk(i,k,3) = 0. fall(i,k,1) = 0. fall(i,k,2) = 0. fall(i,k,3) = 0. fallc(i,k) = 0. falkc(i,k) = 0. xni(i,k) = 1.e3 enddo enddo ! !---------------------------------------------------------------- ! compute the fallout term: ! first, vertical terminal velosity for minor loops ! do k = kts, kte do i = its, ite supcol = t0c-t(i,k) !--------------------------------------------------------------- ! n0s: Intercept parameter for snow [m-4] [HDC 6] !--------------------------------------------------------------- n0sfac(i,k) = max(min(exp(alpha*supcol),n0smax/n0s),1.) if(qrs(i,k,1).le.qcrmin)then rslope(i,k,1) = rslopermax rslopeb(i,k,1) = rsloperbmax rslope2(i,k,1) = rsloper2max rslope3(i,k,1) = rsloper3max else rslope(i,k,1) = 1./lamdar(qrs(i,k,1),den(i,k)) rslopeb(i,k,1) = rslope(i,k,1)**bvtr rslope2(i,k,1) = rslope(i,k,1)*rslope(i,k,1) rslope3(i,k,1) = rslope2(i,k,1)*rslope(i,k,1) endif if(qrs(i,k,2).le.qcrmin)then rslope(i,k,2) = rslopesmax rslopeb(i,k,2) = rslopesbmax rslope2(i,k,2) = rslopes2max rslope3(i,k,2) = rslopes3max else rslope(i,k,2) = 1./lamdas(qrs(i,k,2),den(i,k),n0sfac(i,k)) rslopeb(i,k,2) = rslope(i,k,2)**bvts rslope2(i,k,2) = rslope(i,k,2)*rslope(i,k,2) rslope3(i,k,2) = rslope2(i,k,2)*rslope(i,k,2) endif if(qrs(i,k,3).le.qcrmin)then rslope(i,k,3) = rslopegmax rslopeb(i,k,3) = rslopegbmax rslope2(i,k,3) = rslopeg2max rslope3(i,k,3) = rslopeg3max else rslope(i,k,3) = 1./lamdag(qrs(i,k,3),den(i,k)) rslopeb(i,k,3) = rslope(i,k,3)**bvtg rslope2(i,k,3) = rslope(i,k,3)*rslope(i,k,3) rslope3(i,k,3) = rslope2(i,k,3)*rslope(i,k,3) endif !------------------------------------------------------------- ! Ni: ice crystal number concentraiton [HDC 5c] !------------------------------------------------------------- ! xni(i,k) = min(max(5.38e7*(den(i,k) & ! *max(qci(i,k,2),qmin))**0.75,1.e3),1.e6) temp = (den(i,k)*max(qci(i,k,2),qmin)) temp = sqrt(sqrt(temp*temp*temp)) xni(i,k) = min(max(5.38e7*temp,1.e3),1.e6) enddo enddo ! mstepmax = 1 numdt = 1 do k = kte, kts, -1 do i = its, ite work1(i,k,1) = pvtr*rslopeb(i,k,1)*denfac(i,k)/delz(i,k) work1(i,k,2) = pvts*rslopeb(i,k,2)*denfac(i,k)/delz(i,k) work1(i,k,3) = pvtg*rslopeb(i,k,3)*denfac(i,k)/delz(i,k) numdt(i) = max(nint(max(work1(i,k,1),work1(i,k,2),work1(i,k,3)) & *dtcld+.5),1) if(numdt(i).ge.mstep(i)) mstep(i) = numdt(i) enddo enddo do i = its, ite if(mstepmax.le.mstep(i)) mstepmax = mstep(i) enddo ! do n = 1, mstepmax k = kte do i = its, ite if(n.le.mstep(i)) then falk(i,k,1) = den(i,k)*qrs(i,k,1)*work1(i,k,1)/mstep(i) falk(i,k,2) = den(i,k)*qrs(i,k,2)*work1(i,k,2)/mstep(i) falk(i,k,3) = den(i,k)*qrs(i,k,3)*work1(i,k,3)/mstep(i) fall(i,k,1) = fall(i,k,1)+falk(i,k,1) fall(i,k,2) = fall(i,k,2)+falk(i,k,2) fall(i,k,3) = fall(i,k,3)+falk(i,k,3) qrs(i,k,1) = max(qrs(i,k,1)-falk(i,k,1)*dtcld/den(i,k),0.) qrs(i,k,2) = max(qrs(i,k,2)-falk(i,k,2)*dtcld/den(i,k),0.) qrs(i,k,3) = max(qrs(i,k,3)-falk(i,k,3)*dtcld/den(i,k),0.) endif enddo do k = kte-1, kts, -1 do i = its, ite if(n.le.mstep(i)) then falk(i,k,1) = den(i,k)*qrs(i,k,1)*work1(i,k,1)/mstep(i) falk(i,k,2) = den(i,k)*qrs(i,k,2)*work1(i,k,2)/mstep(i) falk(i,k,3) = den(i,k)*qrs(i,k,3)*work1(i,k,3)/mstep(i) fall(i,k,1) = fall(i,k,1)+falk(i,k,1) fall(i,k,2) = fall(i,k,2)+falk(i,k,2) fall(i,k,3) = fall(i,k,3)+falk(i,k,3) qrs(i,k,1) = max(qrs(i,k,1)-(falk(i,k,1)-falk(i,k+1,1) & *delz(i,k+1)/delz(i,k))*dtcld/den(i,k),0.) qrs(i,k,2) = max(qrs(i,k,2)-(falk(i,k,2)-falk(i,k+1,2) & *delz(i,k+1)/delz(i,k))*dtcld/den(i,k),0.) qrs(i,k,3) = max(qrs(i,k,3)-(falk(i,k,3)-falk(i,k+1,3) & *delz(i,k+1)/delz(i,k))*dtcld/den(i,k),0.) endif enddo enddo do k = kte, kts, -1 do i = its, ite if(n.le.mstep(i).and.t(i,k).gt.t0c) then !--------------------------------------------------------------- ! psmlt: melting of snow [HL A33] [RH83 A25] ! (T>T0: S->R) !--------------------------------------------------------------- xlf = xlf0 work2(i,k) = venfac(p(i,k),t(i,k),den(i,k)) if(qrs(i,k,2).gt.0.) then coeres = rslope2(i,k,2)*sqrt(rslope(i,k,2)*rslopeb(i,k,2)) psmlt(i,k) = xka(t(i,k),den(i,k))/xlf*(t0c-t(i,k))*pi/2. & *n0sfac(i,k)*(precs1*rslope2(i,k,2) & +precs2*work2(i,k)*coeres) psmlt(i,k) = min(max(psmlt(i,k)*dtcld/mstep(i), & -qrs(i,k,2)/mstep(i)),0.) qrs(i,k,2) = qrs(i,k,2) + psmlt(i,k) qrs(i,k,1) = qrs(i,k,1) - psmlt(i,k) t(i,k) = t(i,k) + xlf/cpm(i,k)*psmlt(i,k) endif !--------------------------------------------------------------- ! pgmlt: melting of graupel [HL A23] [LFO 47] ! (T>T0: G->R) !--------------------------------------------------------------- if(qrs(i,k,3).gt.0.) then coeres = rslope2(i,k,3)*sqrt(rslope(i,k,3)*rslopeb(i,k,3)) pgmlt(i,k) = xka(t(i,k),den(i,k))/xlf & *(t0c-t(i,k))*(precg1*rslope2(i,k,3) & +precg2*work2(i,k)*coeres) pgmlt(i,k) = min(max(pgmlt(i,k)*dtcld/mstep(i), & -qrs(i,k,3)/mstep(i)),0.) qrs(i,k,3) = qrs(i,k,3) + pgmlt(i,k) qrs(i,k,1) = qrs(i,k,1) - pgmlt(i,k) t(i,k) = t(i,k) + xlf/cpm(i,k)*pgmlt(i,k) endif endif enddo enddo enddo !--------------------------------------------------------------- ! Vice [ms-1] : fallout of ice crystal [HDC 5a] !--------------------------------------------------------------- mstepmax = 1 mstep = 1 numdt = 1 do k = kte, kts, -1 do i = its, ite if(qci(i,k,2).le.0.) then work2c(i,k) = 0. else xmi = den(i,k)*qci(i,k,2)/xni(i,k) ! diameter = min(dicon * sqrt(xmi),dimax) diameter = max(min(dicon * sqrt(xmi),dimax), 1.e-25) work1c(i,k) = 1.49e4*diameter**1.31 work2c(i,k) = work1c(i,k)/delz(i,k) endif numdt(i) = max(nint(work2c(i,k)*dtcld+.5),1) if(numdt(i).ge.mstep(i)) mstep(i) = numdt(i) enddo enddo do i = its, ite if(mstepmax.le.mstep(i)) mstepmax = mstep(i) enddo ! do n = 1, mstepmax k = kte do i = its, ite if(n.le.mstep(i)) then falkc(i,k) = den(i,k)*qci(i,k,2)*work2c(i,k)/mstep(i) holdc = falkc(i,k) fallc(i,k) = fallc(i,k)+falkc(i,k) holdci = qci(i,k,2) qci(i,k,2) = max(qci(i,k,2)-falkc(i,k)*dtcld/den(i,k),0.) endif enddo do k = kte-1, kts, -1 do i = its, ite if(n.le.mstep(i)) then falkc(i,k) = den(i,k)*qci(i,k,2)*work2c(i,k)/mstep(i) holdc = falkc(i,k) fallc(i,k) = fallc(i,k)+falkc(i,k) holdci = qci(i,k,2) qci(i,k,2) = max(qci(i,k,2)-(falkc(i,k)-falkc(i,k+1) & *delz(i,k+1)/delz(i,k))*dtcld/den(i,k),0.) endif enddo enddo enddo ! !---------------------------------------------------------------- ! rain (unit is mm/sec;kgm-2s-1: /1000*delt ===> m)==> mm for wrf ! do i = its, ite fallsum = fall(i,kts,1)+fall(i,kts,2)+fall(i,kts,3)+fallc(i,kts) fallsum_qsi = fall(i,kts,2)+fallc(i,kts) fallsum_qg = fall(i,kts,3) rainncv(i) = 0. if(fallsum.gt.0.) then rainncv(i) = fallsum*delz(i,kts)/denr*dtcld*1000. rain(i) = fallsum*delz(i,kts)/denr*dtcld*1000. + rain(i) endif IF ( PRESENT (snowncv) .AND. PRESENT (snow)) THEN snowncv(i) = 0. if(fallsum_qsi.gt.0.) then snowncv(i) = fallsum_qsi*delz(i,kts)/denr*dtcld*1000. snow(i) = fallsum_qsi*delz(i,kts)/denr*dtcld*1000. + snow(i) endif ENDIF IF ( PRESENT (graupelncv) .AND. PRESENT (graupel)) THEN graupelncv(i) = 0. if(fallsum_qg.gt.0.) then graupelncv(i) = fallsum_qg*delz(i,kts)/denr*dtcld*1000. graupel(i) = fallsum_qg*delz(i,kts)/denr*dtcld*1000. + graupel(i) endif ENDIF sr(i) = 0. if(fallsum.gt.0.)sr(i)=(fallsum_qsi*delz(i,kts)/denr*dtcld*1000. + & fallsum_qg*delz(i,kts)/denr*dtcld*1000.)/(rainncv(i)+1.e-12) enddo ! !--------------------------------------------------------------- ! pimlt: instantaneous melting of cloud ice [HL A47] [RH83 A28] ! (T>T0: I->C) !--------------------------------------------------------------- do k = kts, kte do i = its, ite supcol = t0c-t(i,k) xlf = xls-xl(i,k) if(supcol.lt.0.) xlf = xlf0 if(supcol.lt.0.and.qci(i,k,2).gt.0.) then qci(i,k,1) = qci(i,k,1) + qci(i,k,2) t(i,k) = t(i,k) - xlf/cpm(i,k)*qci(i,k,2) qci(i,k,2) = 0. endif !--------------------------------------------------------------- ! pihmf: homogeneous freezing of cloud water below -40c [HL A45] ! (T<-40C: C->I) !--------------------------------------------------------------- if(supcol.gt.40..and.qci(i,k,1).gt.0.) then qci(i,k,2) = qci(i,k,2) + qci(i,k,1) t(i,k) = t(i,k) + xlf/cpm(i,k)*qci(i,k,1) qci(i,k,1) = 0. endif !--------------------------------------------------------------- ! pihtf: heterogeneous freezing of cloud water [HL A44] ! (T0>T>-40C: C->I) !--------------------------------------------------------------- if(supcol.gt.0..and.qci(i,k,1).gt.qmin) then ! pfrzdtc = min(pfrz1*(exp(pfrz2*supcol)-1.) & ! *den(i,k)/denr/xncr*qci(i,k,1)**2*dtcld,qci(i,k,1)) pfrzdtc = min(pfrz1*(exp(pfrz2*supcol)-1.) & *den(i,k)/denr/xncr*qci(i,k,1)*qci(i,k,1)*dtcld,qci(i,k,1)) qci(i,k,2) = qci(i,k,2) + pfrzdtc t(i,k) = t(i,k) + xlf/cpm(i,k)*pfrzdtc qci(i,k,1) = qci(i,k,1)-pfrzdtc endif !--------------------------------------------------------------- ! pgfrz: freezing of rain water [HL A20] [LFO 45] ! (TG) !--------------------------------------------------------------- if(supcol.gt.0..and.qrs(i,k,1).gt.0.) then ! pfrzdtr = min(20.*pi**2*pfrz1*n0r*denr/den(i,k) & ! *(exp(pfrz2*supcol)-1.)*rslope3(i,k,1)**2 & ! *rslope(i,k,1)*dtcld,qrs(i,k,1)) temp = rslope3(i,k,1) temp = temp*temp*rslope(i,k,1) pfrzdtr = min(20.*(pi*pi)*pfrz1*n0r*denr/den(i,k) & *(exp(pfrz2*supcol)-1.)*temp*dtcld, & qrs(i,k,1)) qrs(i,k,3) = qrs(i,k,3) + pfrzdtr t(i,k) = t(i,k) + xlf/cpm(i,k)*pfrzdtr qrs(i,k,1) = qrs(i,k,1)-pfrzdtr endif enddo enddo ! ! !---------------------------------------------------------------- ! rsloper: reverse of the slope parameter of the rain(m) ! xka: thermal conductivity of air(jm-1s-1k-1) ! work1: the thermodynamic term in the denominator associated with ! heat conduction and vapor diffusion ! (ry88, y93, h85) ! work2: parameter associated with the ventilation effects(y93) ! do k = kts, kte do i = its, ite if(qrs(i,k,1).le.qcrmin)then rslope(i,k,1) = rslopermax rslopeb(i,k,1) = rsloperbmax rslope2(i,k,1) = rsloper2max rslope3(i,k,1) = rsloper3max else rslope(i,k,1) = 1./lamdar(qrs(i,k,1),den(i,k)) rslopeb(i,k,1) = rslope(i,k,1)**bvtr rslope2(i,k,1) = rslope(i,k,1)*rslope(i,k,1) rslope3(i,k,1) = rslope2(i,k,1)*rslope(i,k,1) endif if(qrs(i,k,2).le.qcrmin)then rslope(i,k,2) = rslopesmax rslopeb(i,k,2) = rslopesbmax rslope2(i,k,2) = rslopes2max rslope3(i,k,2) = rslopes3max else rslope(i,k,2) = 1./lamdas(qrs(i,k,2),den(i,k),n0sfac(i,k)) rslopeb(i,k,2) = rslope(i,k,2)**bvts rslope2(i,k,2) = rslope(i,k,2)*rslope(i,k,2) rslope3(i,k,2) = rslope2(i,k,2)*rslope(i,k,2) endif if(qrs(i,k,3).le.qcrmin)then rslope(i,k,3) = rslopegmax rslopeb(i,k,3) = rslopegbmax rslope2(i,k,3) = rslopeg2max rslope3(i,k,3) = rslopeg3max else rslope(i,k,3) = 1./lamdag(qrs(i,k,3),den(i,k)) rslopeb(i,k,3) = rslope(i,k,3)**bvtg rslope2(i,k,3) = rslope(i,k,3)*rslope(i,k,3) rslope3(i,k,3) = rslope2(i,k,3)*rslope(i,k,3) endif enddo enddo ! do k = kts, kte do i = its, ite work1(i,k,1) = diffac(xl(i,k),p(i,k),t(i,k),den(i,k),qs(i,k,1)) work1(i,k,2) = diffac(xls,p(i,k),t(i,k),den(i,k),qs(i,k,2)) work2(i,k) = venfac(p(i,k),t(i,k),den(i,k)) enddo enddo ! !=============================================================== ! ! warm rain processes ! ! - follows the processes in RH83 and LFO except for autoconcersion ! !=============================================================== ! do k = kts, kte do i = its, ite supsat = max(q(i,k),qmin)-qs(i,k,1) satdt = supsat/dtcld !--------------------------------------------------------------- ! praut: auto conversion rate from cloud to rain [HDC 16] ! (C->R) !--------------------------------------------------------------- if(qci(i,k,1).gt.qc0) then praut(i,k) = qck1*qci(i,k,1)**(7./3.) praut(i,k) = min(praut(i,k),qci(i,k,1)/dtcld) endif !--------------------------------------------------------------- ! pracw: accretion of cloud water by rain [HL A40] [LFO 51] ! (C->R) !--------------------------------------------------------------- if(qrs(i,k,1).gt.qcrmin.and.qci(i,k,1).gt.qmin) then pracw(i,k) = min(pacrr*rslope3(i,k,1)*rslopeb(i,k,1) & *qci(i,k,1)*denfac(i,k),qci(i,k,1)/dtcld) endif !--------------------------------------------------------------- ! prevp: evaporation/condensation rate of rain [HDC 14] ! (V->R or R->V) !--------------------------------------------------------------- if(qrs(i,k,1).gt.0.) then coeres = rslope2(i,k,1)*sqrt(rslope(i,k,1)*rslopeb(i,k,1)) prevp(i,k) = (rh(i,k,1)-1.)*(precr1*rslope2(i,k,1) & +precr2*work2(i,k)*coeres)/work1(i,k,1) if(prevp(i,k).lt.0.) then prevp(i,k) = max(prevp(i,k),-qrs(i,k,1)/dtcld) prevp(i,k) = max(prevp(i,k),satdt/2) else prevp(i,k) = min(prevp(i,k),satdt/2) endif endif enddo enddo ! !=============================================================== ! ! cold rain processes ! ! - follows the revised ice microphysics processes in HDC ! - the processes same as in RH83 and RH84 and LFO behave ! following ice crystal hapits defined in HDC, inclduing ! intercept parameter for snow (n0s), ice crystal number ! concentration (ni), ice nuclei number concentration ! (n0i), ice diameter (d) ! !=============================================================== ! do k = kts, kte do i = its, ite supcol = t0c-t(i,k) supsat = max(q(i,k),qmin)-qs(i,k,2) satdt = supsat/dtcld ifsat = 0 !------------------------------------------------------------- ! Ni: ice crystal number concentraiton [HDC 5c] !------------------------------------------------------------- ! xni(i,k) = min(max(5.38e7*(den(i,k) & ! *max(qci(i,k,2),qmin))**0.75,1.e3),1.e6) temp = (den(i,k)*max(qci(i,k,2),qmin)) temp = sqrt(sqrt(temp*temp*temp)) xni(i,k) = min(max(5.38e7*temp,1.e3),1.e6) eacrs = exp(0.07*(-supcol)) ! xmi = den(i,k)*qci(i,k,2)/xni(i,k) diameter = min(dicon * sqrt(xmi),dimax) vt2i = 1.49e4*diameter**1.31 vt2r=pvtr*rslopeb(i,k,1)*denfac(i,k) vt2s=pvts*rslopeb(i,k,2)*denfac(i,k) vt2g=pvtg*rslopeb(i,k,3)*denfac(i,k) if(supcol.gt.0.and.qci(i,k,2).gt.qmin) then if(qrs(i,k,1).gt.qcrmin) then !------------------------------------------------------------- ! praci: Accretion of cloud ice by rain [HL A15] [LFO 25] ! (TR) !------------------------------------------------------------- acrfac = 2.*rslope3(i,k,1)+2.*diameter*rslope2(i,k,1) & +diameter**2*rslope(i,k,1) praci(i,k) = pi*qci(i,k,2)*n0r*abs(vt2r-vt2i)*acrfac/4. praci(i,k) = min(praci(i,k),qci(i,k,2)/dtcld) !------------------------------------------------------------- ! piacr: Accretion of rain by cloud ice [HL A19] [LFO 26] ! (TS or R->G) !------------------------------------------------------------- piacr(i,k) = pi**2*avtr*n0r*denr*xni(i,k)*denfac(i,k) & *g6pbr*rslope3(i,k,1)*rslope3(i,k,1) & *rslopeb(i,k,1)/24./den(i,k) piacr(i,k) = min(piacr(i,k),qrs(i,k,1)/dtcld) endif !------------------------------------------------------------- ! psaci: Accretion of cloud ice by snow [HDC 10] ! (TS) !------------------------------------------------------------- if(qrs(i,k,2).gt.qcrmin) then acrfac = 2.*rslope3(i,k,2)+2.*diameter*rslope2(i,k,2) & +diameter**2*rslope(i,k,2) psaci(i,k) = pi*qci(i,k,2)*eacrs*n0s*n0sfac(i,k) & *abs(vt2s-vt2i)*acrfac/4. psaci(i,k) = min(psaci(i,k),qci(i,k,2)/dtcld) endif !------------------------------------------------------------- ! pgaci: Accretion of cloud ice by graupel [HL A17] [LFO 41] ! (TG) !------------------------------------------------------------- if(qrs(i,k,3).gt.qcrmin) then egi = exp(0.07*(-supcol)) acrfac = 2.*rslope3(i,k,3)+2.*diameter*rslope2(i,k,3) & +diameter**2*rslope(i,k,3) pgaci(i,k) = pi*egi*qci(i,k,2)*n0g*abs(vt2g-vt2i)*acrfac/4. pgaci(i,k) = min(pgaci(i,k),qci(i,k,2)/dtcld) endif endif !------------------------------------------------------------- ! psacw: Accretion of cloud water by snow [HL A7] [LFO 24] ! (TG, and T>=T0: C->R) !------------------------------------------------------------- if(qrs(i,k,2).gt.qcrmin.and.qci(i,k,1).gt.qmin) then psacw(i,k) = min(pacrc*n0sfac(i,k)*rslope3(i,k,2) & *rslopeb(i,k,2)*qci(i,k,1)*denfac(i,k) & ,qci(i,k,1)/dtcld) endif !------------------------------------------------------------- ! pgacw: Accretion of cloud water by graupel [HL A6] [LFO 40] ! (TG, and T>=T0: C->R) !------------------------------------------------------------- if(qrs(i,k,3).gt.qcrmin.and.qci(i,k,1).gt.qmin) then pgacw(i,k) = min(pacrg*rslope3(i,k,3)*rslopeb(i,k,3) & *qci(i,k,1)*denfac(i,k),qci(i,k,1)/dtcld) endif !------------------------------------------------------------- ! pracs: Accretion of snow by rain [HL A11] [LFO 27] ! (TG) !------------------------------------------------------------- if(qrs(i,k,2).gt.qcrmin.and.qrs(i,k,1).gt.qcrmin) then if(supcol.gt.0) then acrfac = 5.*rslope3(i,k,2)*rslope3(i,k,2)*rslope(i,k,1) & +2.*rslope3(i,k,2)*rslope2(i,k,2)*rslope2(i,k,1) & +.5*rslope2(i,k,2)*rslope2(i,k,2)*rslope3(i,k,1) pracs(i,k) = pi**2*n0r*n0s*n0sfac(i,k)*abs(vt2r-vt2s) & *(dens/den(i,k))*acrfac pracs(i,k) = min(pracs(i,k),qrs(i,k,2)/dtcld) endif !------------------------------------------------------------- ! psacr: Accretion of rain by snow [HL A10] [LFO 28] ! (TS or R->G) (T>=T0: enhance melting of snow) !------------------------------------------------------------- acrfac = 5.*rslope3(i,k,1)*rslope3(i,k,1)*rslope(i,k,2) & +2.*rslope3(i,k,1)*rslope2(i,k,1)*rslope2(i,k,2) & +.5*rslope2(i,k,1)*rslope2(i,k,1)*rslope3(i,k,2) psacr(i,k) = pi**2*n0r*n0s*n0sfac(i,k)*abs(vt2s-vt2r) & *(denr/den(i,k))*acrfac psacr(i,k) = min(psacr(i,k),qrs(i,k,1)/dtcld) endif !------------------------------------------------------------- ! pgacr: Accretion of rain by graupel [HL A12] [LFO 42] ! (TG) (T>=T0: enhance melting of graupel) !------------------------------------------------------------- if(qrs(i,k,3).gt.qcrmin.and.qrs(i,k,1).gt.qcrmin) then acrfac = 5.*rslope3(i,k,1)*rslope3(i,k,1)*rslope(i,k,3) & +2.*rslope3(i,k,1)*rslope2(i,k,1)*rslope2(i,k,3) & +.5*rslope2(i,k,1)*rslope2(i,k,1)*rslope3(i,k,3) pgacr(i,k) = pi**2*n0r*n0g*abs(vt2g-vt2r)*(denr/den(i,k)) & *acrfac pgacr(i,k) = min(pgacr(i,k),qrs(i,k,1)/dtcld) endif ! !------------------------------------------------------------- ! pgacs: Accretion of snow by graupel [HL A13] [LFO 29] ! (S->G) !------------------------------------------------------------- if(qrs(i,k,3).gt.qcrmin.and.qrs(i,k,2).gt.qcrmin) then acrfac = 5.*rslope3(i,k,2)*rslope3(i,k,2)*rslope(i,k,3) & +2.*rslope3(i,k,2)*rslope2(i,k,2)*rslope2(i,k,3) & +.5*rslope2(i,k,2)*rslope2(i,k,2)*rslope3(i,k,3) if(supcol.gt.0) then egs = exp(-0.09*supcol) else egs = 1. endif pgacs(i,k) = pi**2*egs*n0s*n0sfac(i,k)*n0g*abs(vt2g-vt2s) & *(dens/den(i,k))*acrfac pgacs(i,k) = min(pgacs(i,k),qrs(i,k,2)/dtcld) endif if(supcol.le.0) then xlf = xlf0 !------------------------------------------------------------- ! pseml: Enhanced melting of snow by accretion of water [HL A34] ! (T>=T0: S->R) !------------------------------------------------------------- if(qrs(i,k,2).gt.0.) & pseml(i,k) = min(max(cliq*supcol*(psacw(i,k)+psacr(i,k)) & /xlf,-qrs(i,k,2)/dtcld),0.) !------------------------------------------------------------- ! pgeml: Enhanced melting of graupel by accretion of water [HL A24] [RH84 A21-A22] ! (T>=T0: G->R) !------------------------------------------------------------- if(qrs(i,k,3).gt.0.) & pgeml(i,k) = min(max(cliq*supcol*(pgacw(i,k)+pgacr(i,k)) & /xlf,-qrs(i,k,3)/dtcld),0.) endif if(supcol.gt.0) then !------------------------------------------------------------- ! pidep: Deposition/Sublimation rate of ice [HDC 9] ! (TI or I->V) !------------------------------------------------------------- if(qci(i,k,2).gt.0.and.ifsat.ne.1) then pidep(i,k) = 4.*diameter*xni(i,k)*(rh(i,k,2)-1.)/work1(i,k,2) supice = satdt-prevp(i,k) if(pidep(i,k).lt.0.) then pidep(i,k) = max(max(pidep(i,k),satdt/2),supice) pidep(i,k) = max(pidep(i,k),-qci(i,k,2)/dtcld) else pidep(i,k) = min(min(pidep(i,k),satdt/2),supice) endif if(abs(prevp(i,k)+pidep(i,k)).ge.abs(satdt)) ifsat = 1 endif !------------------------------------------------------------- ! psdep: deposition/sublimation rate of snow [HDC 14] ! (TS or S->V) !------------------------------------------------------------- if(qrs(i,k,2).gt.0..and.ifsat.ne.1) then coeres = rslope2(i,k,2)*sqrt(rslope(i,k,2)*rslopeb(i,k,2)) psdep(i,k) = (rh(i,k,2)-1.)*n0sfac(i,k)*(precs1 & *rslope2(i,k,2)+precs2*work2(i,k) & *coeres)/work1(i,k,2) supice = satdt-prevp(i,k)-pidep(i,k) if(psdep(i,k).lt.0.) then psdep(i,k) = max(psdep(i,k),-qrs(i,k,2)/dtcld) psdep(i,k) = max(max(psdep(i,k),satdt/2),supice) else psdep(i,k) = min(min(psdep(i,k),satdt/2),supice) endif if(abs(prevp(i,k)+pidep(i,k)+psdep(i,k)).ge.abs(satdt)) & ifsat = 1 endif !------------------------------------------------------------- ! pgdep: deposition/sublimation rate of graupel [HL A21] [LFO 46] ! (TG or G->V) !------------------------------------------------------------- if(qrs(i,k,3).gt.0..and.ifsat.ne.1) then coeres = rslope2(i,k,3)*sqrt(rslope(i,k,3)*rslopeb(i,k,3)) pgdep(i,k) = (rh(i,k,2)-1.)*(precg1*rslope2(i,k,3) & +precg2*work2(i,k)*coeres)/work1(i,k,2) supice = satdt-prevp(i,k)-pidep(i,k)-psdep(i,k) if(pgdep(i,k).lt.0.) then pgdep(i,k) = max(pgdep(i,k),-qrs(i,k,3)/dtcld) pgdep(i,k) = max(max(pgdep(i,k),satdt/2),supice) else pgdep(i,k) = min(min(pgdep(i,k),satdt/2),supice) endif if(abs(prevp(i,k)+pidep(i,k)+psdep(i,k)+pgdep(i,k)).ge. & abs(satdt)) ifsat = 1 endif !------------------------------------------------------------- ! pigen: generation(nucleation) of ice from vapor [HL 50] [HDC 7-8] ! (TI) !------------------------------------------------------------- if(supsat.gt.0.and.ifsat.ne.1) then supice = satdt-prevp(i,k)-pidep(i,k)-psdep(i,k)-pgdep(i,k) xni0 = 1.e3*exp(0.1*supcol) roqi0 = 4.92e-11*xni0**1.33 pigen(i,k) = max(0.,(roqi0/den(i,k)-max(qci(i,k,2),0.)) & /dtcld) pigen(i,k) = min(min(pigen(i,k),satdt),supice) endif ! !------------------------------------------------------------- ! psaut: conversion(aggregation) of ice to snow [HDC 12] ! (TS) !------------------------------------------------------------- if(qci(i,k,2).gt.0.) then qimax = roqimax/den(i,k) psaut(i,k) = max(0.,(qci(i,k,2)-qimax)/dtcld) endif ! !------------------------------------------------------------- ! pgaut: conversion(aggregation) of snow to graupel [HL A4] [LFO 37] ! (TG) !------------------------------------------------------------- if(qrs(i,k,2).gt.0.) then alpha2 = 1.e-3*exp(0.09*(-supcol)) pgaut(i,k) = min(max(0.,alpha2*(qrs(i,k,2)-qs0)) & ,qrs(i,k,2)/dtcld) endif endif ! !------------------------------------------------------------- ! psevp: Evaporation of melting snow [HL A35] [RH83 A27] ! (T>=T0: S->V) !------------------------------------------------------------- if(supcol.lt.0.) then if(qrs(i,k,2).gt.0..and.rh(i,k,1).lt.1.) then coeres = rslope2(i,k,2)*sqrt(rslope(i,k,2)*rslopeb(i,k,2)) psevp(i,k) = (rh(i,k,1)-1.)*n0sfac(i,k)*(precs1 & *rslope2(i,k,2)+precs2*work2(i,k) & *coeres)/work1(i,k,1) psevp(i,k) = min(max(psevp(i,k),-qrs(i,k,2)/dtcld),0.) endif !------------------------------------------------------------- ! pgevp: Evaporation of melting graupel [HL A25] [RH84 A19] ! (T>=T0: G->V) !------------------------------------------------------------- if(qrs(i,k,3).gt.0..and.rh(i,k,1).lt.1.) then coeres = rslope2(i,k,3)*sqrt(rslope(i,k,3)*rslopeb(i,k,3)) pgevp(i,k) = (rh(i,k,1)-1.)*(precg1*rslope2(i,k,3) & +precg2*work2(i,k)*coeres)/work1(i,k,1) pgevp(i,k) = min(max(pgevp(i,k),-qrs(i,k,3)/dtcld),0.) endif endif enddo enddo ! ! !---------------------------------------------------------------- ! check mass conservation of generation terms and feedback to the ! large scale ! do k = kts, kte do i = its, ite ! delta2=0. delta3=0. if(qrs(i,k,1).lt.1.e-4.and.qrs(i,k,2).lt.1.e-4) delta2=1. if(qrs(i,k,1).lt.1.e-4) delta3=1. if(t(i,k).le.t0c) then ! ! cloud water ! value = max(qmin,qci(i,k,1)) source = (praut(i,k)+pracw(i,k)+psacw(i,k)+pgacw(i,k))*dtcld if (source.gt.value) then factor = value/source praut(i,k) = praut(i,k)*factor pracw(i,k) = pracw(i,k)*factor psacw(i,k) = psacw(i,k)*factor pgacw(i,k) = pgacw(i,k)*factor endif ! ! cloud ice ! value = max(qmin,qci(i,k,2)) source = (psaut(i,k)-pigen(i,k)-pidep(i,k)+praci(i,k) & +psaci(i,k)+pgaci(i,k))*dtcld if (source.gt.value) then factor = value/source psaut(i,k) = psaut(i,k)*factor pigen(i,k) = pigen(i,k)*factor pidep(i,k) = pidep(i,k)*factor praci(i,k) = praci(i,k)*factor psaci(i,k) = psaci(i,k)*factor pgaci(i,k) = pgaci(i,k)*factor endif ! ! rain ! value = max(qmin,qrs(i,k,1)) source = (-praut(i,k)-prevp(i,k)-pracw(i,k)+piacr(i,k) & +psacr(i,k)+pgacr(i,k))*dtcld if (source.gt.value) then factor = value/source praut(i,k) = praut(i,k)*factor prevp(i,k) = prevp(i,k)*factor pracw(i,k) = pracw(i,k)*factor piacr(i,k) = piacr(i,k)*factor psacr(i,k) = psacr(i,k)*factor pgacr(i,k) = pgacr(i,k)*factor endif ! ! snow ! value = max(qmin,qrs(i,k,2)) source = -(psdep(i,k)+psaut(i,k)-pgaut(i,k)+psacw(i,k) & +piacr(i,k)*delta3+praci(i,k)*delta3 & -pracs(i,k)*(1.-delta2)+psacr(i,k)*delta2 & +psaci(i,k)-pgacs(i,k) )*dtcld if (source.gt.value) then factor = value/source psdep(i,k) = psdep(i,k)*factor psaut(i,k) = psaut(i,k)*factor pgaut(i,k) = pgaut(i,k)*factor psacw(i,k) = psacw(i,k)*factor piacr(i,k) = piacr(i,k)*factor praci(i,k) = praci(i,k)*factor psaci(i,k) = psaci(i,k)*factor pracs(i,k) = pracs(i,k)*factor psacr(i,k) = psacr(i,k)*factor pgacs(i,k) = pgacs(i,k)*factor endif ! ! graupel ! value = max(qmin,qrs(i,k,3)) source = -(pgdep(i,k)+pgaut(i,k) & +piacr(i,k)*(1.-delta3)+praci(i,k)*(1.-delta3) & +psacr(i,k)*(1.-delta2)+pracs(i,k)*(1.-delta2) & +pgaci(i,k)+pgacw(i,k)+pgacr(i,k)+pgacs(i,k))*dtcld if (source.gt.value) then factor = value/source pgdep(i,k) = pgdep(i,k)*factor pgaut(i,k) = pgaut(i,k)*factor piacr(i,k) = piacr(i,k)*factor praci(i,k) = praci(i,k)*factor psacr(i,k) = psacr(i,k)*factor pracs(i,k) = pracs(i,k)*factor pgacw(i,k) = pgacw(i,k)*factor pgaci(i,k) = pgaci(i,k)*factor pgacr(i,k) = pgacr(i,k)*factor pgacs(i,k) = pgacs(i,k)*factor endif ! work2(i,k)=-(prevp(i,k)+psdep(i,k)+pgdep(i,k)+pigen(i,k) & +pidep(i,k)) ! update q(i,k) = q(i,k)+work2(i,k)*dtcld qci(i,k,1) = max(qci(i,k,1)-(praut(i,k)+pracw(i,k) & +psacw(i,k)+pgacw(i,k))*dtcld,0.) qrs(i,k,1) = max(qrs(i,k,1)+(praut(i,k)+pracw(i,k) & +prevp(i,k)-piacr(i,k)-pgacr(i,k) & -psacr(i,k))*dtcld,0.) qci(i,k,2) = max(qci(i,k,2)-(psaut(i,k)+praci(i,k) & +psaci(i,k)+pgaci(i,k)-pigen(i,k)-pidep(i,k)) & *dtcld,0.) qrs(i,k,2) = max(qrs(i,k,2)+(psdep(i,k)+psaut(i,k)+psacw(i,k) & -pgaut(i,k)+piacr(i,k)*delta3 & +praci(i,k)*delta3+psaci(i,k)-pgacs(i,k) & -pracs(i,k)*(1.-delta2)+psacr(i,k)*delta2) & *dtcld,0.) qrs(i,k,3) = max(qrs(i,k,3)+(pgdep(i,k)+pgaut(i,k) & +piacr(i,k)*(1.-delta3) & +praci(i,k)*(1.-delta3)+psacr(i,k)*(1.-delta2)& +pracs(i,k)*(1.-delta2)+pgaci(i,k)+pgacw(i,k) & +pgacr(i,k)+pgacs(i,k))*dtcld,0.) xlf = xls-xl(i,k) xlwork2 = -xls*(psdep(i,k)+pgdep(i,k)+pidep(i,k)+pigen(i,k)) & -xl(i,k)*prevp(i,k)-xlf*(piacr(i,k)+psacw(i,k) & +pgacw(i,k)+pgacr(i,k)+psacr(i,k)) t(i,k) = t(i,k)-xlwork2/cpm(i,k)*dtcld else ! ! cloud water ! value = max(qmin,qci(i,k,1)) source=(praut(i,k)+pracw(i,k)+psacw(i,k)+pgacw(i,k))*dtcld if (source.gt.value) then factor = value/source praut(i,k) = praut(i,k)*factor pracw(i,k) = pracw(i,k)*factor psacw(i,k) = psacw(i,k)*factor pgacw(i,k) = pgacw(i,k)*factor endif ! ! rain ! value = max(qmin,qrs(i,k,1)) source = (-psacw(i,k)-praut(i,k)+pseml(i,k)+pgeml(i,k) & -pracw(i,k)-pgacw(i,k)-prevp(i,k))*dtcld if (source.gt.value) then factor = value/source praut(i,k) = praut(i,k)*factor prevp(i,k) = prevp(i,k)*factor pgacw(i,k) = pgacw(i,k)*factor pracw(i,k) = pracw(i,k)*factor psacw(i,k) = psacw(i,k)*factor pseml(i,k) = pseml(i,k)*factor pgeml(i,k) = pgeml(i,k)*factor endif ! ! snow ! value = max(qcrmin,qrs(i,k,2)) source=(pgacs(i,k)-pseml(i,k)-psevp(i,k))*dtcld if (source.gt.value) then factor = value/source pgacs(i,k) = pgacs(i,k)*factor psevp(i,k) = psevp(i,k)*factor pseml(i,k) = pseml(i,k)*factor endif ! ! graupel ! value = max(qcrmin,qrs(i,k,3)) source=-(pgacs(i,k)+pgevp(i,k)+pgeml(i,k))*dtcld if (source.gt.value) then factor = value/source pgacs(i,k) = pgacs(i,k)*factor pgevp(i,k) = pgevp(i,k)*factor pgeml(i,k) = pgeml(i,k)*factor endif work2(i,k)=-(prevp(i,k)+psevp(i,k)+pgevp(i,k)) ! update q(i,k) = q(i,k)+work2(i,k)*dtcld qci(i,k,1) = max(qci(i,k,1)-(praut(i,k)+pracw(i,k) & +psacw(i,k)+pgacw(i,k))*dtcld,0.) qrs(i,k,1) = max(qrs(i,k,1)+(praut(i,k)+pracw(i,k) & +prevp(i,k)+psacw(i,k)+pgacw(i,k)-pseml(i,k) & -pgeml(i,k))*dtcld,0.) qrs(i,k,2) = max(qrs(i,k,2)+(psevp(i,k)-pgacs(i,k) & +pseml(i,k))*dtcld,0.) qrs(i,k,3) = max(qrs(i,k,3)+(pgacs(i,k)+pgevp(i,k) & +pgeml(i,k))*dtcld,0.) xlf = xls-xl(i,k) xlwork2 = -xl(i,k)*(prevp(i,k)+psevp(i,k)+pgevp(i,k)) & -xlf*(pseml(i,k)+pgeml(i,k)) t(i,k) = t(i,k)-xlwork2/cpm(i,k)*dtcld endif enddo enddo ! ! Inline expansion for fpvs ! qs(i,k,1) = fpvs(t(i,k),0,rd,rv,cpv,cliq,cice,xlv0,xls,psat,t0c) ! qs(i,k,2) = fpvs(t(i,k),1,rd,rv,cpv,cliq,cice,xlv0,xls,psat,t0c) hsub = xls hvap = xlv0 cvap = cpv ttp=t0c+0.01 dldt=cvap-cliq xa=-dldt/rv xb=xa+hvap/(rv*ttp) dldti=cvap-cice xai=-dldti/rv xbi=xai+hsub/(rv*ttp) do k = kts, kte do i = its, ite tr=ttp/t(i,k) qs(i,k,1)=psat*exp(log(tr)*(xa))*exp(xb*(1.-tr)) qs(i,k,1) = ep2 * qs(i,k,1) / (p(i,k) - qs(i,k,1)) qs(i,k,1) = max(qs(i,k,1),qmin) tr=ttp/t(i,k) if(t(i,k).lt.ttp) then qs(i,k,2)=psat*exp(log(tr)*(xai))*exp(xbi*(1.-tr)) else qs(i,k,2)=psat*exp(log(tr)*(xa))*exp(xb*(1.-tr)) endif qs(i,k,2) = ep2 * qs(i,k,2) / (p(i,k) - qs(i,k,2)) qs(i,k,2) = max(qs(i,k,2),qmin) enddo enddo ! !---------------------------------------------------------------- ! pcond: condensational/evaporational rate of cloud water [HL A46] [RH83 A6] ! if there exists additional water vapor condensated/if ! evaporation of cloud water is not enough to remove subsaturation ! do k = kts, kte do i = its, ite work1(i,k,1) = conden(t(i,k),q(i,k),qs(i,k,1),xl(i,k),cpm(i,k)) work2(i,k) = qci(i,k,1)+work1(i,k,1) pcond(i,k) = min(max(work1(i,k,1)/dtcld,0.),max(q(i,k),0.)/dtcld) if(qci(i,k,1).gt.0..and.work1(i,k,1).lt.0.) & pcond(i,k) = max(work1(i,k,1),-qci(i,k,1))/dtcld q(i,k) = q(i,k)-pcond(i,k)*dtcld qci(i,k,1) = max(qci(i,k,1)+pcond(i,k)*dtcld,0.) t(i,k) = t(i,k)+pcond(i,k)*xl(i,k)/cpm(i,k)*dtcld enddo enddo ! ! !---------------------------------------------------------------- ! padding for small values ! do k = kts, kte do i = its, ite if(qci(i,k,1).le.qmin) qci(i,k,1) = 0.0 if(qci(i,k,2).le.qmin) qci(i,k,2) = 0.0 enddo enddo enddo ! big loops END SUBROUTINE wsm62d ! ................................................................... REAL FUNCTION rgmma(x) !------------------------------------------------------------------- IMPLICIT NONE !------------------------------------------------------------------- ! rgmma function: use infinite product form REAL :: euler PARAMETER (euler=0.577215664901532) REAL :: x, y INTEGER :: i if(x.eq.1.)then rgmma=0. else rgmma=x*exp(euler*x) do i=1,10000 y=float(i) rgmma=rgmma*(1.000+x/y)*exp(-x/y) enddo rgmma=1./rgmma endif END FUNCTION rgmma ! !-------------------------------------------------------------------------- REAL FUNCTION fpvs(t,ice,rd,rv,cvap,cliq,cice,hvap,hsub,psat,t0c) !-------------------------------------------------------------------------- IMPLICIT NONE !-------------------------------------------------------------------------- REAL t,rd,rv,cvap,cliq,cice,hvap,hsub,psat,t0c,dldt,xa,xb,dldti, & xai,xbi,ttp,tr INTEGER ice ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ttp=t0c+0.01 dldt=cvap-cliq xa=-dldt/rv xb=xa+hvap/(rv*ttp) dldti=cvap-cice xai=-dldti/rv xbi=xai+hsub/(rv*ttp) tr=ttp/t if(t.lt.ttp.and.ice.eq.1) then fpvs=psat*(tr**xai)*exp(xbi*(1.-tr)) else fpvs=psat*(tr**xa)*exp(xb*(1.-tr)) endif ! - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - END FUNCTION fpvs !------------------------------------------------------------------- SUBROUTINE wsm6init(den0,denr,dens,cl,cpv,allowed_to_read) !------------------------------------------------------------------- IMPLICIT NONE !------------------------------------------------------------------- !.... constants which may not be tunable REAL, INTENT(IN) :: den0,denr,dens,cl,cpv LOGICAL, INTENT(IN) :: allowed_to_read REAL :: pi ! pi = 4.*atan(1.) xlv1 = cl-cpv ! qc0 = 4./3.*pi*denr*r0**3*xncr/den0 ! 0.419e-3 -- .61e-3 qck1 = .104*9.8*peaut/(xncr*denr)**(1./3.)/xmyu*den0**(4./3.) ! 7.03 ! bvtr1 = 1.+bvtr bvtr2 = 2.5+.5*bvtr bvtr3 = 3.+bvtr bvtr4 = 4.+bvtr bvtr6 = 6.+bvtr g1pbr = rgmma(bvtr1) g3pbr = rgmma(bvtr3) g4pbr = rgmma(bvtr4) ! 17.837825 g6pbr = rgmma(bvtr6) g5pbro2 = rgmma(bvtr2) ! 1.8273 pvtr = avtr*g4pbr/6. eacrr = 1.0 pacrr = pi*n0r*avtr*g3pbr*.25*eacrr precr1 = 2.*pi*n0r*.78 precr2 = 2.*pi*n0r*.31*avtr**.5*g5pbro2 xm0 = (di0/dicon)**2 xmmax = (dimax/dicon)**2 roqimax = 2.08e22*dimax**8 ! bvts1 = 1.+bvts bvts2 = 2.5+.5*bvts bvts3 = 3.+bvts bvts4 = 4.+bvts g1pbs = rgmma(bvts1) !.8875 g3pbs = rgmma(bvts3) g4pbs = rgmma(bvts4) ! 12.0786 g5pbso2 = rgmma(bvts2) pvts = avts*g4pbs/6. pacrs = pi*n0s*avts*g3pbs*.25 precs1 = 4.*n0s*.65 precs2 = 4.*n0s*.44*avts**.5*g5pbso2 pidn0r = pi*denr*n0r pidn0s = pi*dens*n0s ! pacrc = pi*n0s*avts*g3pbs*.25*eacrc ! bvtg1 = 1.+bvtg bvtg2 = 2.5+.5*bvtg bvtg3 = 3.+bvtg bvtg4 = 4.+bvtg g1pbg = rgmma(bvtg1) g3pbg = rgmma(bvtg3) g4pbg = rgmma(bvtg4) pacrg = pi*n0g*avtg*g3pbg*.25 g5pbgo2 = rgmma(bvtg2) pvtg = avtg*g4pbg/6. precg1 = 2.*pi*n0g*.78 precg2 = 2.*pi*n0g*.31*avtg**.5*g5pbgo2 pidn0g = pi*deng*n0g ! rslopermax = 1./lamdarmax rslopesmax = 1./lamdasmax rslopegmax = 1./lamdagmax rsloperbmax = rslopermax ** bvtr rslopesbmax = rslopesmax ** bvts rslopegbmax = rslopegmax ** bvtg rsloper2max = rslopermax * rslopermax rslopes2max = rslopesmax * rslopesmax rslopeg2max = rslopegmax * rslopegmax rsloper3max = rsloper2max * rslopermax rslopes3max = rslopes2max * rslopesmax rslopeg3max = rslopeg2max * rslopegmax ! END SUBROUTINE wsm6init END MODULE module_mp_wsm6