Bare soil evaporation separated over irrigated and non-irrigated soil

CONTRIBUTORS.md

@@ -8,3 +8,4 @@
 | maggiehendry    | Maggie Hendry    | Met Office  | 2026-08-21 |
 | DanCopsey       | Dan Copsey       | Met Office  | 2026-08-24 |
 | Pierre-siddall  | Pierre Siddall   | Met Office  | 2026-08-26 |
+| nicgedney       | Nic Gedney       | Met Office  | 2026-09-01 |

doc/source/namelists/jules_irrig.nml.rst

@@ -50,7 +50,7 @@ This namelist specifies the different options available for setting up the irrig
    1. Not available yet. In a future release this will replace :nml:mem:`l_irrig_dmd`.
    2. Apply irrigation to irrigated surface types C3_irrig and/or C4_irrig. This option requires :nml:mem:`JULES_IRRIG::l_irrig_dmd` = FALSE and :nml:mem:`JULES_PFTPARM::irrig_pft_io` = 0 or 1.
 
-  When :nml:mem:`JULES_IRRIG::l_irrig_dmd` = TRUE, :nml:mem:`JULES_IRRIG::irrig_option` is not available.
+   When :nml:mem:`JULES_IRRIG::l_irrig_dmd` = TRUE, :nml:mem:`JULES_IRRIG::irrig_option` is not available.
 
 .. nml:member:: l_irrig_limit
 
@@ -148,6 +148,24 @@ This namelist specifies the different options available for setting up the irrig
    :nml:mem:`nstep_irrig` = NINT(frequency of irrigation update (in sec)) / :nml:mem:`JULES_TIME::timestep_len`
 
 
+.. nml:member:: l_soil_evap_irrig_separate
+
+   :type: logical
+   :default: F
+
+   Switch controlling whether the bare soil evaporation from the irrigated and non-irrigated parts of the grid-box (or soil tile) is controlled by the mean soil moisture or the separate irrigated and non-irrigated soil moisture columns.
+
+   Only available when :nml:mem:`l_irrig_dmd` = TRUE (:nml:mem:`irrig_option` = 1 in future release).
+
+   TRUE
+       Bare soil evaporation is explicitly calculated from the irrigated and non-irrigated soil moisture columns.
+
+   FALSE
+      No effect.
+
+   This must be set to FALSE if :nml:mem:`irrig_option` = No irrigation (0) or Tile-based irrigation (2).
+
+
 .. _References_irrig:
 
 ``JULES_IRRIG`` references

rose-meta/jules-shared/jules-irrig/HEAD/rose-meta.conf

@@ -1,4 +1,4 @@
-[namelist:jules_irrig]
+namelist:jules_irrig]
 compulsory=true
 description=Configuration of irrigation demand code
 ns=namelist/JULES Science Settings/jules_irrig
@@ -63,6 +63,7 @@ trigger=namelist:jules_irrig=irr_crop: .true.;
        =namelist:jules_irrig=nstep_irrig: .true.;
        =namelist:jules_irrig_props: .true.;
        =namelist:jules_irrig=irrig_option: .false.;
+       =namelist:jules_irrig=l_soil_evap_irrig_separate: .true.;
 type=logical
 url=https://metoffice.github.io/jules/latest/namelists/jules_irrig.nml.html#JULES_IRRIG::l_irrig_dmd
 
@@ -103,3 +104,12 @@ fail-if=namelist:jules_irrig=frac_irrig_all_tiles == '.true.' and this == '.true
 sort-key=g
 type=logical
 url=https://metoffice.github.io/jules/latest/namelists/jules_irrig.nml.html#JULES_IRRIG::set_irrfrac_on_irrtiles
+
+[namelist:jules_irrig=l_soil_evap_irrig_separate]
+compulsory=true
+description=logical to decide whether bare soil evaporation is
+           =calculated over the grid-box mean (false) or
+	   =explicitly irrigated and non-irrigated fractions (true)
+sort-key=h
+type=logical
+url=https://metoffice.github.io/jules/latest/namelists/jules_irrig.nml.html#JULES_IRRIG::l_soil_evap_irrig_separate

rose-meta/jules-standalone/versions.py

@@ -70,15 +70,17 @@ def upgrade(self, config, meta_config=None):
         return config, self.reports
 
 
-class vn82_t155(MacroUpgrade):
+class vn82_t139(MacroUpgrade):
 
-    """Upgrade macro from JULES by Author"""
+    """Upgrade macro from JULES by Nic Gedney"""
 
-    BEFORE_TAG = "vn8.2_t141"
-    AFTER_TAG = "vn8.2_t155"
+    BEFORE_TAG = "vn8.2_t155"
+    AFTER_TAG = "vn8.2_t139"
 
     def upgrade(self, config, meta_config=None):
         """Upgrade a JULES runtime app configuration."""
 
-        # Bump tag to pick up metadata changes
+        # Add l_soil_evap_irrig_separate to namelist jules_irrig
+        self.add_setting(config, ["namelist:jules_irrig","l_soil_evap_irrig_separate"], ".false.")
+
         return config, self.reports

rose-stem/app/eraint_rfm_2ddata/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -498,6 +498,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/eraint_trip_2ddata/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -497,6 +497,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_closures/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -492,6 +492,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_es_1p1/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -492,6 +492,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_euro4/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -493,6 +493,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_gl4/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -493,6 +493,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_gl7/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -493,6 +493,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_irrig_limit_high_river_storage/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -493,6 +493,8 @@ irr_crop=0
 !!irrigtiles=0
 l_irrig_dmd=.true.
 l_irrig_limit=.true.
+l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 nstep_irrig=24
 set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_irrig_limit_low_river_storage/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -493,6 +493,8 @@ irr_crop=0
 !!irrigtiles=0
 l_irrig_dmd=.true.
 l_irrig_limit=.true.
+l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 nstep_irrig=24
 set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_rivers/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -492,6 +492,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_rivers_restart/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -494,6 +494,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_rivers_spinup/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -492,6 +492,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_trip/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -492,6 +492,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_trip_restart/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -493,6 +493,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_trip_spinup/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -492,6 +492,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/gswp2_ukv/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -493,6 +493,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/imogen_layeredc/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -486,6 +486,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/imogen_layeredc_spinup/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -487,6 +487,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=24
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/loobos_crm1_traitF/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -492,6 +492,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=48
 !!set_irrfrac_on_irrtiles=.false.

rose-stem/app/loobos_crm4_traitF/rose-app.conf

@@ -1,4 +1,4 @@
-meta=jules-standalone/vn8.2_t155
+meta=jules-standalone/vn8.2_t139
 
 [command]
 default=rose-run jules.exe
@@ -492,6 +492,8 @@ irrig_option=0
 !!irrigtiles=0
 l_irrig_dmd=.false.
 !!l_irrig_limit=.false.
+!!l_soil_evap_irrig_expl=.false.
+l_soil_evap_irrig_separate=.false.
 !!nirrtile=0
 !!nstep_irrig=48
 !!set_irrfrac_on_irrtiles=.false.