What's New

RRTM_LW Version	Release Date	Modifications
v3.3	June 2010	Public Release Modified rrtm_instructions to reflect updates, Fixed interpolation scheme bug in taumol.f (See email notes from July 2009, Subject: CCMVal Case B), Add new continuum coefficients created by Andy Maher (obtained from /storm/rc4/amaher/rrtm_cntm_mt_ckd_2.5/new-k_gB-files) in early May 2010, In rrtm.f, cldprop.f: Overhaul the code to read in cloud optical properties, so a number of revisions were made to the August 2009 revisions. New code is stored in src_newcloudopts, and has been copied into src, Attempted to accomodate all options properly for iscat=0,1,2/inflag=0,1,2,10; Modified OUT_CLD_RRTM file to reflect these options/, Modified many common blocks to bring read-in properties into main part of code, Fixed significant bug in cldprop.f that utilized the iceflag=2 extinction properties in the iceflag=3 routine, There was an apparent bug for inflag = 0,1 in that taucloud was only set for the first band. So, in cldprop.f, added: DO 1000 IB = 1, NCBANDS // TAUCLOUD(LAY,IB) = ABSCLD1 * CWP // 1000 CONTINUE, Lower limit on radliq now set to 2.5 (see emails from Mike Iacono, February 2010, subject: cldprop issues). This is now consistent with RRTMG_LW, Updated rrtatm.f to be consistent with lblatm v9.14 using program lbl2r_v9.14.f; this mean that the CO2MX input parameter NO LONGER works and all run decks using this scaling factor will need modification, extra.f: Changed MXZMD to 6000 to be consistent with new rrtatm.f; Replaced MXMOL in most all points with MX_XS to be consistent with LBLRTM and original RRTM, Changed MXMOL in all subroutines to 39, rrtm.f,rrtatm.f, and others: Added gravity, specific heat of air, molecular weight of air, sec/day to NIST data block in rrtm.f; Modified common blocks accordingly; removed AIRMWT data statement from rrtatm.f, rrtm.f: Updated NIST constants, rrtatm.f: Revised gravity formulation to use "grav" constant rather than hard-wired value of 9.80 in the formula for g0, Increase number of calculational output levels to 600: a) Modify MXLAY to 603 in all codes, b) Modify MXFSC to 600 in rrtatm.f, extra.f, rtrdis.f: a) DIMENSION BBD1(MXLAY),BBD2(MXLAY),BBD3(MXLAY), b) DIMENSION WTNUM(MXANG), c) LOGICAL DELTAM
v3.2	July 2005	Internal Release Only Fixed bug in rtrdis.f: heating rate calculation needed a "-" in front of variable heatfac to produce appropriate sign (Note: RRTM_LW and RRTM_SW were designed to keep the net flux positive for both spectral regimes, thereby necessitating the "-" sign for the LW heating rate calculations), Fixed minor bugs in taumol, setcoef, as reported by NCEP, Added WV continuum coefficients inadvertently left out of the original v3.0 release, Fixed other minor bugs, Added Absoft Pro Fortran Compiler makefile for MAC OS_X, Upgraded rrtatm.f to be compatible with CVS revision 9.3 lblatm.f
v3.1	July 2004	Internal Release Only Fixed bug in the digits of PI in rrtm.f, Created rtrdis to call DISORT v2 to do scattering calculations, Modified disort v2 to do double precision, and change sgi makefile to compile in double, Modified cldprop to do scattering: a) Updated the cldprop spheres to use latest streamer version 3.0, b) Remade Fu properties on finer grid, c) Modified documentation, d) Now output a file called OUT_CLD_RRTM with the cloud optical properties, Added patent statement, Changed number of digits printed out in net flux in rrtm.f, Added new rrtatm.f made from lblatm.f v8.1 and updated extra.f to be compatible, Removed numatmos option in rrtm.f, Removed NUMATMOS option, Updated pressure level formatting to be consistent with RRTM_SW, Updated revision number format to be consistent with RRTM_SW/LBLRTM, Updated rrtm_instructions
v3.0.1	September 2002	Public Release This version is nearly identical to v3.0 EXCEPT for a change to the SUN/SGI makefiles, a minor modification to the instruction file, and a minor modification to the sample_runs directory in the tar file.
v3.0	August 2002	Public Release Full release of the new version of the model.