List of Deprecated Features#

Table 1 provides an overview of features to be removed in future releases. Further details on these deprecated features are provided below.

If you want to activate a deprecated feature anyways, add --enable-deprecated to your configuration. Note, that you have to re-configure in this case.

Please note that deprecated features are only minimally tested to keep them basically running until final removal.

Table 1: List of deprecated features#
Option	Scheduled for Removal
RRTM radiation (NWP)	icon-2027.04
GME Ozone (NWP)	icon-2027.04

RRTM radiation scheme (NWP physics)#

Description:: Old operational radiation scheme derived from ECHAM/IFS
Associated Namelist Options:: inwp_radiation=1 (&nwp_phy_nml); lrtm_filename (&nwp_phy_nml); cldopt_filename (&nwp_phy_nml)
Reasons:: Unmaintained legacy code; Known, unresolved bugs (zigzag patterns in long wave flux divergences); Many compiler warnings; Out of operational use for nearly 5 years, not recommended; Recent radiation input options are only available to alternative schemes (reduced maintenance overhead)
Recommended Alternatives:: ecRad: inwp_radiation=4
Scheduled for Removal: icon-2027.04

Ozone Option 6 (GME ozone) (NWP physics)#

Description:: Ozone climatology with T5 geographical distribution and Fourier series for seasonal cycle
Associated Namelist Options:: irad_o3=6 (&radiation_nml)
Reasons:: Was only available for inwp_radiation=1; Not maintained for more than 10 years
Recommended Alternatives:: Blending between GEMS and MACC ozone climatologies, irad_o3=79 (&radiation_nml)
Scheduled for Removal: icon-2027.04