meteoadriatic wrote: ↑
Sat Mar 25, 2017 12:10 pm
Are there some new configuration entries like new physics?
No new physic scheme.
I don't know for sure if there are new configuration options, maybe one or two... but maybe they are not interesting.
After a superficial source code comparison between DTC vs NAM versions, it seems to me that most of the changes have affected the pattern of microphysics. But need further investigation...
- New things in Ferrier-Aligo MP -
-- Further modifications starting on 28 July 2015
! (15) Added calculations for radar reflectivity and number concentrations of
! rain (Nrain) and precipitating ice (Nsnow).
! (16) Removed double counting of air resistance term for riming onto ice (PIACW)
! (17) The maximum rime factor (RFmx) is now a function of MASSI(INDEXS), accounting
! for the increase in unrimed ice particle densities as values of INDEXS
! decrease from the maximum upper limit of 1000 microns to the lower limit of
! 50 microns, coinciding with the assumed size of cloud ice; see lines 1128-1134.
! (18) A new closure is used for updating the rime factor, which is described in
! detail near lines 1643-1682. The revised code is near lines 1683-1718.
! (19) Restructured the two-pass algorithm to be more robust, removed the HAIL
! & LARGE_RF logical variables so that NLICE>NLImax can occur.
! (20) Increased nsimax (see !aug27 below)
! (21) Modified the rain sedimentation (see two !aug27 blocks below)
! (22) NInuclei is the lower of Fletcher (1962), Cooper (1986), or NSImax.
! (23) NLImax is no longer used or enforced. Instead, INDEXS=MDImax when RF>20,
! else INDEXS is a function of temperature. Look for !sep10 comment.
! (24) An override was inserted for (18), such that the rime density is not diluted
! diluted when RF>20. Look for !sep10 comment.
! (25) Radar reflectivity calculations were changes to reduce radar bright bands,
! limit enhanced, mixed-phase reflectivity to RF>=20. Look for !sep10 comments.
! (26) NLICE is not to exceed NSI_max (250 L^-1) when RF<20. Look for !sep16 comments.
! Commented out! (28) Increase hail fall speeds using Thompson et al. (2008). Look for !sep22 comments.
! (29) Modify NLImax, INDEXS for RF>=20. Look for !sep22 comments.
! (30) Check on NSmICE, Vci based on whether FLIMASS<1. Look for !sep22a comments.
! Revised in (34)! (31) Introduced RFlag logical, which if =T enforces a lower limit of drop sizes not
! to go below INDEXRmin and N0r is adjusted. Look for !nov25 comments (corrections,
! refinements to sep25 & nov18 versions, includes an additional fix in nov25-fix).
! Also set INDEXRmin=500 rather than 250 microns.
!--- The following changes now refer to dates when those were made in 2016.
! (32) Convective (RF>=20, Ng~10 L^-1, RHOg~500 kg m^-3), transition (RF=10, Ng~25 L^-1,
! RHOg~300 kg m^-3), & stratiform (RF<2) profiles are blended based on RF. !mar08
! (33) Fixed bug in Biggs' freezing, put back in collisional drop freezing. !mar03
! (34) Changes in (31) are revised so that INDEXRmin at and below 0C level is
! based on a rain rate equal to the snowfall rate above the 0C level. !mar03
! (35) Increase radar reflectivity when RF>10 and RQSnew > 2.5 g m^-3. !mar12
! (36) !mar10 combines all elements of (32)-(35) together.
! (37) Bug fixes for the changes in (34) and the RFLAG variable !apr18
! (38) Revised Schumann-Ludlam limit. !apr18
! (39) Simplified PCOND (cloud cond/evap) calculation !apr21
! (40) Slight change in calculating RF. !apr22
! (41) Reduce RF values for calculating mean sizes of snow, graupel, sleet/hail !apr22a
! (42) Increase reflectivity from large, wet, high rime factor ice (graupel) by
! assuming |Kw|**2/|Ki|**2 = 0.224 (Smith, 1984, JCAM).
! (43) Major restructuring of code to allow N0r to vary from N0r0 !may11
! (44) More major restructuring of code to use fixed XLS, XLV, XLF !may12
! (45) Increased VEL_INC ~ VrimeF**2, put the enhanced graupel/hail fall speeds
! from Thompson into the code but only in limited circumstances, restructured
! and streamlined the INDEXS calculation, removed the upper limit for
! for the vapor mixing ratio is at water saturation when calculating ice
! deposition, and N0r is gradually increased for conditions supporting
! drizzle when rain contents decrease below 0.25 g/m**3. !may17
! (46) The may11 code changes that increase N0r0 when rain contents exceed 1 g m^-3
! have been removed, limit the number of iterations calculating final rain
! parameters, remove the revised N0r calculation for reflectivity. All of
! the changes following those made in the may10 code. !may20
! (47) Reduce the assumed # concentration of hail/sleet when RF>10 from 5 L^-1 to
! 1 L^-1, and also reduce it for graupel when RF>5 from 10 L^-1 to 5 L^-1.
! This is being done to try and make greater use of the Thompson graupel/hail
! fallspeeds by having INDEXS==MDImax.
! (48) Increased NCW from 200e6 to 300e6 for a more delayed onset of drizzle,
! simplified drizzle algorithm to reduce/eliminate N0r bulls eyes and to allow
! for supercooled drizzle, and set limits for 8.e6 <= N0r (m^-4) <= 1.e9 !may31
! (49) Further restructuring of code to better define STRAT, DRZL logicals,
! add these rain flags to mprates arrays !jun01
! (50) Increase in reflectivity due to wet ice was commented out.
! (51) Fixed minor bug to update INDEXR2 in the "rain_pass: do" loop. !jun13
! (52) Final changes to Nsnow for boosting reflectivities from ice for
! mass contents exceeding 5 g m^-3. !jun16
! (53) Cosmetic changes only that do not affect the calculations. Removed old, unused
! diagnostic arrays. Updated comments.