ESCOMP · brian-eaton · Dec 12, 2024 · Dec 27, 2024 · Dec 27, 2024 · Dec 30, 2024
diff --git a/bld/build-namelist b/bld/build-namelist
@@ -4059,27 +4059,6 @@ if ( $dyn eq 'fv3') {
 
 }
 
-# EUL dycore
-if ($dyn eq 'eul') {
-    add_default($nl, 'eul_dif2_coef');
-    add_default($nl, 'eul_hdif_order');
-    add_default($nl, 'eul_hdif_kmnhdn');
-    add_default($nl, 'eul_hdif_coef');
-    add_default($nl, 'eul_divdampn');
-    add_default($nl, 'eul_tfilt_eps');
-    add_default($nl, 'eul_kmxhdc');
-    add_default($nl, 'eul_nsplit');
-}
-
-# SLD dycore
-if ($dyn eq 'sld') {
-    add_default($nl, 'sld_dif2_coef');
-    add_default($nl, 'sld_dif4_coef');
-    add_default($nl, 'sld_divdampn');
-    add_default($nl, 'sld_tfilt_eps');
-    add_default($nl, 'sld_kmxhdc');
-}
-
 # Single column model
 if ($cfg->get('scam')) {
     add_default($nl, 'iopfile');

diff --git a/bld/config_files/definition.xml b/bld/config_files/definition.xml
@@ -26,8 +26,8 @@ Switch specifies whether CAM is being built by the CCSM sequential scripts.  0 =
 <entry id="cpl" valid_values="mct,nuopc" value="mct" >
 Coupling framework: mct or nuopc.  Default: mct.
 </entry>
-<entry id="dyn" valid_values="eul,fv,fv3,se,mpas" value="">
-Dynamics package: eul, fv, fv3, se, or mpas.
+<entry id="dyn" valid_values="fv,fv3,se,mpas" value="">
+Dynamics package: fv, fv3, se, or mpas.
 </entry>
 <entry id="waccm_phys" valid_values="0,1" value="0">
 Switch to turn on waccm physics: 0 => no, 1 => yes.
@@ -148,15 +148,15 @@ Modifications that allow perturbation growth testing: 0=off, 1=on.
 </entry>
 <entry id="scam" valid_values="0,1" value="0">
 Configure CAM for single column mode and specify an IOP: 0=no, 1=yes.
-This option only supported for the Eulerian and SE dycores.
+This option only supported for the SE dycore.
 </entry>
 <entry id="scam_iop" valid_values="arm95,arm97,atex,bomex,cgilss11,cgilss12,cgilss6,dycomsrf01,dycomsrf02,gateiii,mpace,rico,sas,sparticus,togaii,twp06,camfrc,none" value="none">
 Single column IOP
-Supported for Eulerian and SE dycores.
+Only supported for SE dycore.
 </entry>
 <entry id="camiop" valid_values="0,1" value="0">
 Configure CAM to generate an IOP file that can be used to drive SCAM: 0=no, 1=yes.
-Supported for Eulerian and SE dycores.
+Only supported for SE dycore.
 </entry>
 <entry id="hgrid" value="">
 Horizontal grid specifier.  The recognized values depend on
@@ -195,15 +195,6 @@ Switch on (off) age of air tracers: 0=off, 1=on.
 Maximum number of constituents that are radiatively active or in any one
 diagnostic list.
 </entry>
-<entry id="trm" value="1">
-Maximum Fourier wavenumber.
-</entry>
-<entry id="trn" value="1">
-Highest degree of the Legendre polynomials for m=0.
-</entry>
-<entry id="trk" value="1">
-Highest degree of the associated Legendre polynomials.
-</entry>
 <entry id="pcols" value="16">
 Maximum number of columns in a chunk (physics data structure).
 </entry>

diff --git a/bld/config_files/horiz_grid.xml b/bld/config_files/horiz_grid.xml
@@ -2,15 +2,6 @@
 
 <config_horiz_grid>
 
-<horiz_grid dyn="eul"   hgrid="512x1024"  nlat="512" nlon="1024" m="341" n="341" k="341" />
-<horiz_grid dyn="eul"   hgrid="256x512"   nlat="256" nlon="512"  m="170" n="170" k="170" />
-<horiz_grid dyn="eul"   hgrid="128x256"   nlat="128" nlon="256"  m="85"  n="85"  k="85"  />
-<horiz_grid dyn="eul"   hgrid="64x128"    nlat="64"  nlon="128"  m="42"  n="42"  k="42"  />
-<horiz_grid dyn="eul"   hgrid="48x96"     nlat="48"  nlon="96"   m="31"  n="31"  k="31"  />
-<horiz_grid dyn="eul"   hgrid="32x64"     nlat="32"  nlon="64"   m="21"  n="21"  k="21"  />
-<horiz_grid dyn="eul"   hgrid="8x16"      nlat="8"   nlon="16"   m="5"   n="5"   k="5"   />
-<horiz_grid dyn="eul"   hgrid="1x1"       nlat="1"   nlon="1"    m="1"   n="1"   k="1"   />
-
 <horiz_grid dyn="fv"    hgrid="0.23x0.31"  nlat="768"  nlon="1152" />
 <horiz_grid dyn="fv"    hgrid="0.47x0.63"  nlat="384"  nlon="576"  />
 <horiz_grid dyn="fv"    hgrid="0.5x0.625"  nlat="361"  nlon="576"  />

diff --git a/bld/configure b/bld/configure
@@ -78,7 +78,7 @@ OPTIONS
      -cppdefs <string>  A string of user specified CPP defines.  Appended to
                         Makefile defaults.  E.g. -cppdefs '-DVAR1 -DVAR2'
      -cpl               Coupling framework [mct | nuopc].  Default: mct.
-     -dyn <name>        Dynamical core option: [eul | fv | se | fv3 | mpas].  Default: fv.
+     -dyn <name>        Dynamical core option: [fv | se | fv3 | mpas].  Default: fv.
      -edit_chem_mech    Invokes CAMCHEM_EDITOR to allow the user to edit the chemistry mechanism file
      -hgrid <name>      Specify horizontal grid.  Use nlatxnlon for spectral grids;
                         dlatxdlon for fv grids (dlat and dlon are the grid cell size
@@ -123,7 +123,6 @@ OPTIONS
   Options relevent to SCAM mode:
 
      -camiop            Configure CAM to generate an IOP file that can be used to drive SCAM.
-                        This switch only works with the Eulerian dycore.
      -scam <iopname>    Compiles model in single column mode and configures for iop
                         [ arm95 | arm97 | atex | bomex | cgilsS11 | cgilsS12 | cgilsS6 | dycomsRF01 |
                           dycomsRF02 | gateIII | mpace | rico | sparticus | togaII | twp06 | SAS | camfrc ].
@@ -700,14 +699,6 @@ $waccm_phys = $cfg_ref->get('waccm_phys');
 
 if ($print>=2) { print "WACCM physics: $waccm_phys$eol"; }
 
-
-# WACCM physics only runs with FV, SE and FV3 dycores
-if ( ($waccm_phys) and ($dyn_pkg eq 'eul') ) {
-    die <<"EOF";
-** ERROR: WACCM physics does not run with the Eulerian spectral dycore.
-EOF
-}
-
 # WACCM includes 4 age of air tracers by default
 if ($chem_pkg =~ /waccm_ma/ or $chem_pkg =~ /waccm_tsmlt/) {
     $cfg_ref->set('age_of_air_trcs', 1);
@@ -1222,10 +1213,10 @@ if (defined $opts{'scam'}) {
 }
 my $scam = $cfg_ref->get('scam') ? "ON" : "OFF";
 
-# The only dycores supported in SCAM mode are Eulerian and Spectral Elements
-if ($scam eq 'ON' and !($dyn_pkg eq 'eul' or $dyn_pkg eq 'se')) {
+# The only dycore supported in SCAM mode is the Spectral Element
+if ($scam eq 'ON' and !($dyn_pkg eq 'se')) {
     die <<"EOF";
-**  ERROR: SCAM mode only works with Eulerian or SE dycores.
+**  ERROR: SCAM mode only works with SE dycore.
 **         Requested dycore is: $dyn_pkg
 EOF
 }
@@ -1239,10 +1230,10 @@ if (defined $opts{'camiop'}) {
 }
 my $camiop = $cfg_ref->get('camiop') ? "ON" : "OFF";
 
-# The only dycores supported in SCAM mode are Eulerian and Spectral Elements
-if ($camiop eq 'ON' and !($dyn_pkg eq 'eul' or $dyn_pkg eq 'se')) {
+# The only dycore supported in SCAM mode is the Spectral Element
+if ($camiop eq 'ON' and !($dyn_pkg eq 'se')) {
     die <<"EOF";
-**  ERROR: CAMIOP mode only works with the Eulerian or Spectral Element dycores.
+**  ERROR: CAMIOP mode only works with the Spectral Element dycore.
 **         Requested dycore is: $dyn_pkg
 EOF
 }
@@ -1256,9 +1247,6 @@ my $hgrid;
 if ($dyn_pkg eq 'fv') {
     $hgrid = '1.9x2.5';
 }
-elsif ($dyn_pkg eq 'eul') {
-    $hgrid = '64x128';
-}
 elsif ($dyn_pkg eq 'se') {
     $hgrid = 'ne16np4';
 }
@@ -1934,12 +1922,6 @@ $cfg_cppdefs .= " -DPLEV=$nlev -DPCNST=$nadv -DPCOLS=$pcols -DPSUBCOLS=$psubcols
 # Radiatively active constituent number
 $cfg_cppdefs .= " -DN_RAD_CNST=$max_n_rad_cnst";
 
-# Spectral truncation parameters
-my $trm = $cfg_ref->get('trm');
-my $trn = $cfg_ref->get('trn');
-my $trk = $cfg_ref->get('trk');
-$cfg_cppdefs .= " -DPTRM=$trm -DPTRN=$trn -DPTRK=$trk";
-
 # offline driver for FV dycore
 if ($offline_dyn) { $cfg_cppdefs .= ' -DOFFLINE_DYN'; }
 
@@ -2358,11 +2340,6 @@ sub write_filepath
         print $fh "$camsrcdir/src/utils/pilgrim\n";
     }
 
-    # Advective transport
-    if ($dyn eq 'eul') {
-        print $fh "$camsrcdir/src/advection/slt\n";
-    }
-
     print $fh "$camsrcdir/src/cpl/$cpl\n";
     print $fh "$camsrcdir/src/control\n";
     print $fh "$camsrcdir/src/utils\n";
@@ -2539,9 +2516,9 @@ sub set_horiz_grid
         $hgrid =~ m/C(\d+)/;
         $cfg_ref->set('hgrid', $hgrid);
     }
-    elsif ($dyn_pkg =~ m/^eul$|^fv/) {
+    elsif ($dyn_pkg =~ m/^fv/) {
 
-        # For EUL and FV dycores the parameters are read from an input file,
+        # For FV dycore the parameters are read from an input file,
         # and if no dycore/grid matches are found then issue error message.
 
         my $xml = XML::Lite->new( $hgrid_file );
@@ -2570,26 +2547,7 @@ sub set_horiz_grid
         unless ($found) { die "set_horiz_grid: no match for dycore $dyn_pkg and hgrid $hgrid\n"; }
 
         # Set parameter values -- dycore specific.
-        if ( $dyn_pkg =~ m/eul/ ) {
-            $cfg_ref->set('nlat', $a{'nlat'});
-            $cfg_ref->set('nlon', $a{'nlon'});
-            $cfg_ref->set('trm',  $a{'m'});
-            $cfg_ref->set('trn',  $a{'n'});
-            $cfg_ref->set('trk',  $a{'k'});
-
-            # Override resolution settings to configure for SCAM mode.  The override is needed
-            # because in SCAM mode the -hgrid option is used to specify the resolution of default
-            # datasets from which single data columns are extracted.
-            my $scam = $cfg_ref->get('scam');
-            if ($scam) {
-                $cfg_ref->set('nlat', 1);
-                $cfg_ref->set('nlon', 1);
-                $cfg_ref->set('trm',  1);
-                $cfg_ref->set('trn',  1);
-                $cfg_ref->set('trk',  1);
-            }
-        }
-        elsif ( $dyn_pkg eq 'fv' ) {
+        if ( $dyn_pkg eq 'fv' ) {
             $cfg_ref->set('nlat', $a{'nlat'});
             $cfg_ref->set('nlon', $a{'nlon'});
         }