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Çë¸÷λ°ïæ½âÊÍÒ»ÏÂÈçÏÂ×Ó³ÌÐòÖкìÉ«²¿·ÖµÄÓï¾ä£¬ÔÚ³ÌÐò¿ªÊ¼Ö´ÐеÄÇ°ÃæÓÐÀàËÆº¯ÊýµÄ¶¨Ò壬ȻºóÔÚÖ´Ðйý³ÌÖе÷Óá£ÇëÎÊÕâÊÇʲôÓ÷¨£¿Ð»Ð»£¡ subroutine slope_wdm6(qrs,ncr,den,denfac,t,rslope,rslopeb,rslope2,rslope3, & vt,vtn,its,ite,kts,kte) IMPLICIT NONE INTEGER :: its,ite, jts,jte, kts,kte REAL, DIMENSION( its:ite , kts:kte,3) :: & qrs, & rslope, & rslopeb, & rslope2, & rslope3, & vt REAL, DIMENSION( its:ite , kts:kte) :: & ncr, & vtn, & den, & denfac, & t REAL, PARAMETER :: t0c = 273.15 REAL, DIMENSION( its:ite , kts:kte ) :: & n0sfac REAL :: lamdar, lamdas, lamdag, x, y, z, supcol integer :: i, j, k !---------------------------------------------------------------- ! 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,z)= exp(log(((pidnr*z)/(x*y)))*((.33333333))) 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! 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 .or. ncr(i,k).le.nrmin ) 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) = min(1./lamdar(qrs(i,k,1),den(i,k),ncr(i,k)),1.e-3) 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 vt(i,k,1) = pvtr*rslopeb(i,k,1)*denfac(i,k) vt(i,k,2) = pvts*rslopeb(i,k,2)*denfac(i,k) vt(i,k,3) = pvtg*rslopeb(i,k,3)*denfac(i,k) vtn(i,k) = pvtrn*rslopeb(i,k,1)*denfac(i,k) if(qrs(i,k,1).le.0.0) vt(i,k,1) = 0.0 if(qrs(i,k,2).le.0.0) vt(i,k,2) = 0.0 if(qrs(i,k,3).le.0.0) vt(i,k,3) = 0.0 if(ncr(i,k).le.0.0) vtn(i,k) = 0.0 enddo enddo END subroutine slope_wdm6 |
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2Â¥2012-02-26 08:36:30
digua88
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snoopyzhao
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