RRTMG dcyc2t3 Module

This module contains the CCPP-compliant dcyc2t3 codes that fits radiative fluxes and heating rates from a coarse radiation calculation time interval into model's more frequent time steps. More...

Functions/Subroutines
subroutine, public	dcyc2t3::dcyc2t3_run (solhr, slag, sdec, cdec, sinlat, coslat, con_g, con_cp, con_pi, con_sbc, xlon, coszen, tsfc_lnd, tsfc_ice, tsfc_wat, tf, tsflw, tsfc, sfcemis_lnd, sfcemis_ice, sfcemis_wat, sfcdsw, sfcdswc, sfcnsw, sfcdlw, swh, swhc, hlw, hlwc, sfcnirbmu, sfcnirdfu, sfcvisbmu, sfcvisdfu, sfcnirbmd, sfcnirdfd, sfcvisbmd, sfcvisdfd, im, levs, deltim, fhswr, dry, icy, wet, damp_lw_fluxadj, lfnc_k, lfnc_p0, use_lw_jacobian, sfculw, use_med_flux, sfculw_med, fluxlwup_jac, t_lay, p_lay, p_lev, flux2d_lwup, flux2d_lwdown, pert_radtend, do_sppt, ca_global, tsfc_radtime, dtdt, dtdtnp, htrlw, adjsfcdsw, adjsfcdswc, adjsfcnsw, adjsfcdlw, adjsfculw_lnd, adjsfculw_ice, adjsfculw_wat, xmu, xcosz, adjnirbmu, adjnirdfu, adjvisbmu, adjvisdfu, adjnirbmd, adjnirdfd, adjvisbmd, adjvisdfd, errmsg, errflg)

Detailed Description

Solar heating rates and fluxes are scaled by the ratio of cosine of zenith angle at the current time to the mean value used in radiation calculation. Surface downward LW flux is scaled by the ratio of current surface air temperature to the corresponding temperature saved during LW radiation calculation. Upward LW flux at the surface is computed by current ground surface temperature. Surface emissivity effect will be taken in other part of the model.

program history:

• 198? nmc mrf - created, similar as treatment in gfdl radiation treatment
• 1994 y. hou - modified solar zenith angle calculation
• nov 2004 x. wu - add sfc sw downward flux to the variable list for sea-ice model
• mar 2008 y. hou - add cosine of zenith angle as output for sunshine duration time calc.
• sep 2008 y. hou - separate net sw and downward lw in slrad, changed the sign of sfc net sw to consistent with other parts of the mdl (positive value defines from atmos to the ground). rename output fluxes as adjusted fluxes. other minor changes such as renaming some of passing argument names to be consistent with calling program.
• apr 2009 y. hou - integrated with the new parallel model along with other modifications
• mar 2011 y. hou - minor modification including rearrange loop orders and loop structures to improve efficiency
• mar 2014 x. wu - add sfc nir/vis bm/df to the variable list for the coupled model input
• jul 2014 s moorthi - merge gfs and nems versions
• jun 2014 y. hou - revised to include both up and down sw spectral component fluxes
• Oct 2014 y. hous s. moorthi - add emissivity contribution to upward longwave flux
• Mar 2019 s. moorthi - modify xmu calculation in a time centered way and add more accuracy when physics time step is close to radiation time step

Argument Table

RRTMG dcyc2t3 General Algorithm