Feature/catemgn/nitrate gmi coupling

CHANGELOG.md

@@ -18,7 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Changed effective radius in MieQuery.H to remove in place units scaling; made
   corresponding change in Chem_SettlingSimple
 - Updated optics lookup tables to accommodate area and effective radius calculation
-- Check userRC in ESMF_GridCompRun in GOCART2G gridcomp
+I- Check userRC in ESMF_GridCompRun in GOCART2G gridcomp
 - The pressure lid change associated with the introduction of run0 to set 0 above the lid
 - Fwet value in dust modified from 0.8 to 1.0
 - Dust and Sea salt Emission scale factors updated for L181
@@ -47,6 +47,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Removed erroneous/extraneous friendly attributes to internal state for DU and NI
   when in data_driven mode
 - typo in filepath for BR optics file
+- Units error for dust and sea salt radius in NIheterogenousChem in Process Library corrected.
+- stochiometric coefficent correction for heterogenous production diagnostic NI_phet
+  in NIheterogenousChem in Process Library.
+- corrected references for RH factor for hno3 uptake on dust in NIheterogenousChem in Process Library.
+- units error for external data hno3 corrected in NI instance file and in Process Library.
+- corrected units error for hno3 column diagnostic in Process Library.
+
+
 - Bug fix for "WetRemovalUFS"
 
 ### Added
@@ -56,6 +64,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   coupling of GMI OH, NO3, H2O2 to sulfur chemistry mechanism
 - Added a callback to allow a chemistry module to call for optical properties needed
   for photolysis calculation; currently used for GMI with CloudJ
+- Added 3d diagnostics for nitrate production.
+- Added logic in NI2G_GridCompMod.F90 through NI2G_instance_NI.rc to allow two-way
+  coupling of GMI HNO3 to nitrate chemistry mechanism.
 - Implementation of the "WetRemovalUFS" option for sulfate
 
 ## [v2.4.3] - 2025-07-21

ESMF/GOCART2G_GridComp/NI2G_GridComp/NI2G_GridCompMod.F90

@@ -61,6 +61,7 @@ module NI2G_GridCompMod
        real, allocatable :: fnumDU(:), fnumSS(:) ! DU and SS particles per kg mass
        type(ThreadWorkspace), allocatable :: workspaces(:)
        type(ESMF_Alarm) :: alarm
+       logical :: using_GMI !CM: logic for hno3 GMI coupling
    end type NI2G_GridComp
 
    type wrap_
@@ -138,6 +139,9 @@ subroutine SetServices ( GC, RC )
     ! process generic config items
     call self%GA_Environment%load_from_config( cfg, universal_cfg, __RC__)
 
+    ! process NI specific items
+    call ESMF_ConfigGetAttribute(cfg, self%using_GMI, label='using_GMI:', __RC__)
+
 !   Is NI data driven?
 !   ------------------
     call determine_data_driven (COMP_NAME, data_driven, __RC__)
@@ -232,6 +236,16 @@ subroutine SetServices ( GC, RC )
           restart=MAPL_RestartOptional, __RC__)
     end if ! (data_driven)
 
+    if(self%using_GMI) then
+
+       call MAPL_AddImportSpec(GC,                           &
+          SHORT_NAME = 'GMI_HNO3',                             &
+          LONG_NAME  = 'nitric_acid',                   &
+          UNITS      = 'mol/mol',                            &
+          DIMS       = MAPL_DimsHorzVert,                    &
+          VLOCATION  = MAPL_VLocationCenter,                 &
+          RESTART    = MAPL_RestartSkip,     __RC__)
+    endif
 
 !   Import, Export, Internal states for computational instance
 !   ----------------------------------------------------------
@@ -827,45 +841,64 @@ subroutine Run2 (GC, import, export, clock, RC)
     allocate(dqa, mold=lwi, __STAT__)
     allocate(drydepositionfrequency, mold=lwi, __STAT__)
 
-    alarm_is_ringing = ESMF_AlarmIsRinging(self%alarm, _RC)
+
+    if(self%using_GMI) then
+      xhno3 = GMI_HNO3
+      call MAPL_MaxMin ( 'GMI:HNO3  ', xhno3)
+
+    else
+      alarm_is_ringing = ESMF_AlarmIsRinging(self%alarm, _RC)
 #ifdef DEBUG
-    if (alarm_is_ringing) then
+      if (alarm_is_ringing) then
           if (MAPL_Am_I_Root()) then
              print *,'DEBUG:: NI replenish alarm is ringing'
           end if
-    end if
+      end if
 #endif
 
-!   Save local copy of HNO3 for first pass through run method regardless
-    thread = MAPL_get_current_thread()
-    workspace => self%workspaces(thread)
+      !Save local copy of HNO3 for first pass through run method regardless
+      thread = MAPL_get_current_thread()
+      workspace => self%workspaces(thread)
 
-    !if (workspace%first) then
-       !xhno3 = MAPL_UNDEF
-       !workspace%first = .false.
-    !end if
+      !if (workspace%first) then
+         !xhno3 = MAPL_UNDEF
+         !workspace%first = .false.
+      !end if
+
+      ! Recycle HNO3 every 3 hours
+      if (alarm_is_ringing) then
+         xhno3 = NITRATE_HNO3
+      end if
+    endif
 
-!   Recycle HNO3 every 3 hours
-    if (alarm_is_ringing) then
-       xhno3 = NITRATE_HNO3
-    end if
 
     if (associated(NIPNO3AQ)) NIPNO3AQ(:,:) = 0.
     if (associated(NIPNH4AQ)) NIPNH4AQ(:,:) = 0.
     if (associated(NIPNH3AQ)) NIPNH3AQ(:,:) = 0.
+    if (associated(NIPHNO3AQ)) NIPHNO3AQ(:,:) = 0.
+    ! 3D diag
+    if (associated(NIPNO3AQV)) NIPNO3AQV(:,:,:) = 0.
+    if (associated(NIPNH4AQV)) NIPNH4AQV(:,:,:) = 0.
+    if (associated(NIPNH3AQV)) NIPNH3AQV(:,:,:) = 0.
+    if (associated(NIPHNO3AQV)) NIPHNO3AQV(:,:,:) = 0.
 
     call NIthermo (self%km, self%klid, self%cdt, MAPL_GRAV, delp, airdens, &
                    t, rh2, fMassHNO3, MAPL_AIRMW, SO4, NH3, NO3an1, NH4a, &
-                   xhno3, NIPNO3AQ, NIPNH4AQ, NIPNH3AQ, __RC__)
+                   xhno3, NIPNO3AQ, NIPNH4AQ, NIPNH3AQ, NIPHNO3AQ, &
+                   NIPNO3AQV, NIPNH4AQV, NIPNH3AQV, NIPHNO3AQV, __RC__)
 
 
-    call NIheterogenousChem (NIHT, xhno3, MAPL_UNDEF, MAPL_AVOGAD, MAPL_AIRMW, &
+    call NIheterogenousChem (NIHT, NIHTV, xhno3, MAPL_UNDEF, MAPL_AVOGAD, MAPL_AIRMW, &
                              MAPL_PI, MAPL_RUNIV/1000., airdens, t, rh2, delp, DU, &
                              SS, self%rmedDU*1.e-6, self%rmedSS*1.e-6, &
                              self%fnumDU, self%fnumSS, self%km, self%klid, &
                              self%cdt, MAPL_GRAV, fMassHNO3, fMassNO3, NO3an1, NO3an2, &
                              NO3an3, HNO3CONC, HNO3SMASS,  HNO3CMASS, __RC__)
-!   Save local copy of HNO3 for first pass through run method regardless
+
+    ! CM: update GMI_HNO3 after nitrate processes for 2way coupling.
+    if(self%using_GMI) then
+      GMI_HNO3 = xhno3
+    endif
 
 
 !   NI Settling

ESMF/GOCART2G_GridComp/NI2G_GridComp/NI2G_GridComp_ExtData.yaml

@@ -96,4 +96,8 @@ Exports:
     regrid: CONSERVE
     sample: NI2G_sample_0
     variable: NO3AN3
-
+  GMI_HNO3:
+    collection: /dev/null
+    regrid: CONSERVE
+    sample: NI2G_sample_2
+    variable: GMI_HNO3

ESMF/GOCART2G_GridComp/NI2G_GridComp/NI2G_StateSpecs.rc

@@ -35,7 +35,8 @@ category: IMPORT
  EMI_NH3_OC   | kg m-2 s-1 | xy   | N    |           | SKIP    | ocean emissions
  EMI_NH3_RE   | kg m-2 s-1 | xy   | N    |           | SKIP    | resedential emissions
  EMI_NH3_TR   | kg m-2 s-1 | xy   | N    |           | SKIP    | transport emissions
- NITRATE_HNO3 | kg m-2 s-1 | xyz  | C    |           | SKIP    | nitrate hno3 emissions
+ NITRATE_HNO3 | mol mol-1  | xyz  | C    |           | SKIP    | nitrate hno3 offline field
+ GMI_HNO3     | mol mol-1  | xyz  | C    |           | SKIP    | nitrate GMI HNO3 source
  DU           | kg kg-1    | xyz  | C    | 5         | OPT     | Dust Mixing Ratio all bins
  SS           | kg kg-1    | xyz  | C    | 5         | OPT     | Sea Salt Mixing Ratio all bins
  SO4          | kg kg-1    | xyz  | C    |           | OPT     | Sulfate Mixing Ratio
@@ -64,10 +65,16 @@ category: EXPORT
   NISCACOEFRH20 | m-1          | xyz   | C     | size(self%wavelengths_profile) | Nitrate Scattering Coefficient - fixed RH=20%
   NISCACOEFRH80 | m-1          | xyz   | C     | size(self%wavelengths_profile) | Nitrate Scattering Coefficient - fixed RH=80%
   NIBCKCOEF     | m-1 sr-1     | xyz   | C     | size(self%wavelengths_profile) | Nitrate Backscatter Coefficient
+  NIPNO3AQV     | kg m-2 s-1   | xyz   | C     |                                | 3D Nitrate Production from Aqueous Chemistry
+  NIPNH4AQV     | kg m-2 s-1   | xyz   | C     |                                | 3D Ammonium production from Aqueous Chemistry
+  NIPNH3AQV     | kg m-2 s-1   | xyz   | C     |                                | 3D Ammonia Change from Aqueous Chemistry
+  NIPHNO3AQV    | kg m-2 s-1   | xyz   | C     |                                | 3D Nitric acid  Change from Aqueous Chemistry
+  NIHTV         | kg m-2 s-1   | xyz   | C     | 3                              | 3D Nitrate Production from Het Chem (Bin %d)
 # ............. | ............ | ..... | ..... | ...........                    | ..................................
   NIPNO3AQ      | kg m-2 s-1   | xy    | N     |                                | Nitrate Production from Aqueous Chemistry
   NIPNH4AQ      | kg m-2 s-1   | xy    | N     |                                | Ammonium Production from Aqueous Chemistry
   NIPNH3AQ      | kg m-2 s-1   | xy    | N     |                                | Ammonia Change from Aqueous Chemistry
+  NIPHNO3AQ      | kg m-2 s-1   | xy    | N     |                                | Nitric Acid Change from Aqueous Chemistry
   NIHT          | kg m-2 s-1   | xy    | N     | 3                              | Nitrate Production from Het Chem (Bin %d)
   NISD          | kg m-2 s-1   | xy    | N     | 3                              | Nitrate Sedimentation (Bin %d)
   NIDP          | kg m-2 s-1   | xy    | N     | 3                              | Nitrate Dry Deposition (Bin %d)
@@ -114,7 +121,7 @@ category: INTERNAL
  NO3an1 |kg kg-1   | xyz  | C    | MAPL_RestartOptional | T | DYNAMICS:TURBULENCE:MOIST | Nitrate size bin 001
  NO3an2 |kg kg-1   | xyz  | C    | MAPL_RestartOptional | T | DYNAMICS:TURBULENCE:MOIST | Nitrate size bin 002
  NO3an3 |kg kg-1   | xyz  | C    | MAPL_RestartOptional | T | DYNAMICS:TURBULENCE:MOIST | Nitrate size bin 003
- XHNO3  |kg m-2 s-1| xyz  | C    |                      | F |                           | buffer for NITRATE_HNO3
+ XHNO3  |mol mol-1 | xyz  | C    |                      | F |                           | buffer for NITRATE_HNO3
 
 #********************************************************
 #

ESMF/GOCART2G_GridComp/NI2G_GridComp/NI2G_instance_NI.rc

@@ -33,6 +33,10 @@ sigma: 2.0  2.0  2.0  2.0  2.0
 
 pressure_lid_in_hPa: 0.01
 
+# HNO3 from GMI
+using_GMI: .false.
+
+
 # SettlingSolver options
 # Options: 'gocart' or 'ufs'
 settling_scheme: 'gocart'

Process_Library/GOCART2G_Process.F90

@@ -5986,7 +5986,7 @@ end subroutine carbonChemLoss
 ! !IROUTINE: NIheterogenousChemOpt
 !
 ! !INTERFACE:
-   subroutine NIheterogenousChem (NI_phet, xhno3, UNDEF, AVOGAD, AIRMW, PI, RUNIV, rhoa, tmpu, relhum, delp, &
+   subroutine NIheterogenousChem (NI_phet, NI_phetv, xhno3, UNDEF, AVOGAD, AIRMW, PI, RUNIV, rhoa, tmpu, relhum, delp, &
                                   DU, SS, rmedDU, rmedSS, fnumDU, fnumSS,                                    &
                                   km, klid, cdt, grav, fMassHNO3, fMassNO3, nNO3an1, nNO3an2,                &
                                   nNO3an3, HNO3_conc, HNO3_sfcmass, HNO3_colmass, rc)
@@ -6009,8 +6009,8 @@ subroutine NIheterogenousChem (NI_phet, xhno3, UNDEF, AVOGAD, AIRMW, PI, RUNIV,
    real, dimension(:,:,:), intent(in)  :: delp           ! pressure thickness [Pa]
    real, pointer, dimension(:,:,:,:), intent(in) :: DU   ! dust aerosol [kg/kg]
    real, pointer, dimension(:,:,:,:), intent(in) :: SS   ! sea salt aerosol [kg/kg]
-   real, dimension(:) ,intent(in)      :: rmedDU         ! dust aerosol radius [um]
-   real, dimension(:) ,intent(in)      :: rmedSS         ! sea salt aerosol radius [um]
+   real, dimension(:) ,intent(in)      :: rmedDU         ! dust aerosol radius [m]
+   real, dimension(:) ,intent(in)      :: rmedSS         ! sea salt aerosol radius [m]
    real, dimension(:) ,intent(in)      :: fnumDU         ! number of dust particles per kg mass
    real, dimension(:) ,intent(in)      :: fnumSS         ! number of sea salt particles per kg mass
    integer, intent(in)                 :: km             ! number of model levels
@@ -6022,10 +6022,11 @@ subroutine NIheterogenousChem (NI_phet, xhno3, UNDEF, AVOGAD, AIRMW, PI, RUNIV,
 
 ! !INOUTPUT PARAMETERS:
    real, pointer, dimension(:,:,:), intent(inout)  :: NI_phet   ! Nitrate Production from Het Chem [kg/(m^2 sec)]
-   real, dimension(:,:,:), intent(inout)  :: xhno3     ! buffer for NITRATE_HNO3 [kg/(m^2 sec)]
+   real, pointer, dimension(:,:,:,:), intent(inout) :: NI_phetv   ! 3D Nitrate Production from Het Chem [kg/(m^2 sec)]
+   real, dimension(:,:,:), intent(inout)  :: xhno3     ! buffer for NITRATE_HNO3 [mol mol-1]
    real, pointer, dimension(:,:,:), intent(inout)  :: HNO3_conc ! Nitric Acid Mass Concentration [kg/m^3]
    real, pointer, dimension(:,:), intent(inout)    :: HNO3_sfcmass ! Nitric Acid Surface Mass Concentration [kg/m^3]
-   real, pointer, dimension(:,:), intent(inout)    :: HNO3_colmass ! Nitric Acid Column Mass Density [kg/m^3]
+   real, pointer, dimension(:,:), intent(inout)    :: HNO3_colmass ! Nitric Acid Column Mass Density [kg/m^2]
    real, pointer, dimension(:,:,:), intent(inout)  :: nNO3an1 ! Nitrate bin 1 [kg/kg]
    real, pointer, dimension(:,:,:), intent(inout)  :: nNO3an2 ! Nitrate bin 2 [kg/kg]
    real, pointer, dimension(:,:,:), intent(inout)  :: nNO3an3 ! Nitrate bin 3 [kg/kg]
@@ -6144,11 +6145,18 @@ subroutine NIheterogenousChem (NI_phet, xhno3, UNDEF, AVOGAD, AIRMW, PI, RUNIV,
    nNO3an3 = nNO3an3 + kan3 * deltahno3 * fMassNO3 / fMassHNO3
 
    if(associated(NI_phet)) then
-      NI_phet(:,:,1) = (1.0 / (grav*cdt)) * sum(kan1*deltahno3*delp, dim=3)
-      NI_phet(:,:,2) = (1.0 / (grav*cdt)) * sum(kan2*deltahno3*delp, dim=3)
-      NI_phet(:,:,3) = (1.0 / (grav*cdt)) * sum(kan3*deltahno3*delp, dim=3)
+      NI_phet(:,:,1) = (1.0 / (grav*cdt)) * sum(kan1*deltahno3*(fMassNO3/fMassHNO3)*delp, dim=3)
+      NI_phet(:,:,2) = (1.0 / (grav*cdt)) * sum(kan2*deltahno3*(fMassNO3/fMassHNO3)*delp, dim=3)
+      NI_phet(:,:,3) = (1.0 / (grav*cdt)) * sum(kan3*deltahno3*(fMassNO3/fMassHNO3)*delp, dim=3)
    end if
 
+   if(associated(NI_phetv)) then
+     NI_phetv(:,:,:,1) = (1.0 / (grav*cdt)) * kan1*deltahno3*(fMassNO3/fMassHNO3)*delp
+     NI_phetv(:,:,:,2) = (1.0 / (grav*cdt)) * kan2*deltahno3*(fMassNO3/fMassHNO3)*delp
+     NI_phetv(:,:,:,3) = (1.0 / (grav*cdt)) * kan3*deltahno3*(fMassNO3/fMassHNO3)*delp
+   end if
+
+
 !  Output diagnostic HNO3
 !  ----------------------
 !  Calculate the HNO3 mass concentration
@@ -6164,7 +6172,7 @@ subroutine NIheterogenousChem (NI_phet, xhno3, UNDEF, AVOGAD, AIRMW, PI, RUNIV,
       HNO3_colmass(i1:i2,j1:j2) = 0.
       do k = klid, km
         HNO3_colmass(i1:i2,j1:j2) &
-         =   HNO3_colmass(i1:i2,j1:j2) + xhno3(i1:i2,j1:j2,k)*delp(i1:i2,j1:j2,k)/grav
+         =   HNO3_colmass(i1:i2,j1:j2) + xhno3(i1:i2,j1:j2,k) * fMassHNO3 / AIRMW * delp(i1:i2,j1:j2,k)/grav
       end do
    endif
 
@@ -6411,7 +6419,12 @@ function sktrs_hno3 ( tk, rh, sad, ad, radA, pi, rgas, fMassHNO3 )
    p_dfkg   = sqrt(3.472e-2 + 1.0/fmassHNO3)
    p_avgvel = sqrt(8.0 * rgas_dp * 1000.0 / (pi_dp * fmassHNO3))
 
-      ! RH factor - Figure 1 in Duncan et al. (2010)
+      ! RH factor: rh dependent gamma for dust - references:
+      ! Table 1 in Liu et al. J. Phys. Chem. A 2008
+      ! doi:10.1021/jp076169h 
+      ! Figure 1 in Fairlie et al. ACP 2010 
+      ! doi:10.5194/acp-10-3999-2010
+
       f_rh = 0.03
 
       if (rh >= 0.1 .and. rh < 0.3)       then
@@ -6428,7 +6441,6 @@ function sktrs_hno3 ( tk, rh, sad, ad, radA, pi, rgas, fMassHNO3 )
          f_rh = 2.0
       end if
 
-!     Following uptake coefficients of Liu et al.(2007)
       gamma = gamma_hno3 * f_rh
 
       sqrt_tk = sqrt(tk)
@@ -9546,7 +9558,8 @@ end subroutine get_HenrysLawCts
 
    subroutine NIthermo (km, klid, cdt, grav, delp, rhoa, tmpu, rh, fMassHNO3, fMassAir, &
                         SO4, NH3, NO3an1, NH4a, xhno3, &
-                        NI_pno3aq, NI_pnh4aq, NI_pnh3aq, rc)
+                        NI_pno3aq, NI_pnh4aq, NI_pnh3aq, NI_phno3aq, & 
+                        NI_pno3aqv,NI_pnh4aqv, NI_pnh3aqv, NI_phno3aqv, rc)
 
 
 ! !USES:
@@ -9569,10 +9582,15 @@ subroutine NIthermo (km, klid, cdt, grav, delp, rhoa, tmpu, rh, fMassHNO3, fMass
    real, dimension(:,:,:), intent(inout)  :: NH3    ! Ammonia (NH3, gas phase) [kg kg-1]
    real, dimension(:,:,:), intent(inout)  :: NO3an1 ! Nitrate size bin 001 [kg kg-1]
    real, dimension(:,:,:), intent(inout)  :: NH4a   ! Ammonium ion (NH4+, aerosol phase) [kg kg-1]
-   real, dimension(:,:,:), intent(inout)  :: xhno3  ! buffer for NITRATE_HNO3 [kg m-2 sec-1]
+   real, dimension(:,:,:), intent(inout)  :: xhno3  ! buffer for NITRATE_HNO3 [mol mol-1]
    real, pointer, dimension(:,:), intent(inout) :: NI_pno3aq ! Nitrate Production from Aqueous Chemistry [kg m-2 s-1]
    real, pointer, dimension(:,:), intent(inout) :: NI_pnh4aq ! Ammonium Production from Aqueous Chemistry [kg m-2 s-1]
    real, pointer, dimension(:,:), intent(inout) :: NI_pnh3aq ! Ammonia Change from Aqueous Chemistry [kg m-2 s-1]
+   real, pointer, dimension(:,:), intent(inout) :: NI_phno3aq ! Nitric Acid Change from Aqueous Chemistry [kg m-2 s-1]
+   real, pointer, dimension(:,:,:), intent(inout) :: NI_pno3aqv ! 3D Nitrate Production from Aqueous Chemistry [kg m-2 s-1]
+   real, pointer, dimension(:,:,:), intent(inout) :: NI_pnh4aqv ! 3D Ammonium Production from Aqueous Chemistry [kg m-2 s-1]
+   real, pointer, dimension(:,:,:), intent(inout) :: NI_pnh3aqv ! 3D Ammonia Change from Aqueous Chemistry [kg m-2 s-1]
+   real, pointer, dimension(:,:,:), intent(inout) :: NI_phno3aqv ! 3D Nitric Acid Change from Aqueous Chemistry [kg m-2 s-1]
 
 ! !OUTPUT PARAMETERS:
    integer, optional, intent(out) :: rc                   ! Error return code:
@@ -9638,6 +9656,29 @@ subroutine NIthermo (km, klid, cdt, grav, delp, rhoa, tmpu, rh, fMassHNO3, fMass
        NI_pnh3aq(i,j) = NI_pnh3aq(i,j) &
         + (GNH3 / fmmr_to_conc - NH3(i,j,k)) &
           * delp(i,j,k)/grav/cdt
+      if(associated(NI_phno3aq)) &
+       NI_phno3aq(i,j) = NI_phno3aq(i,j) &
+       + (GNO3 / fmmr_to_conc - (xhno3(i,j,k)*fMassHNO3/fMassAir)) &
+          * delp(i,j,k)/grav/cdt
+
+      if(associated(NI_pno3aqv)) &
+        NI_pno3aqv(i,j,k) = NI_pno3aqv(i,j,k) &
+         + (ANO3 / fmmr_to_conc - NO3an1(i,j,k)) &
+          * delp(i,j,k)/grav/cdt
+      if(associated(NI_pnh4aqv)) &
+        NI_pnh4aqv(i,j,k) = NI_pnh4aqv(i,j,k) &
+         + (ANH4 / fmmr_to_conc - NH4a(i,j,k)) &
+          * delp(i,j,k)/grav/cdt
+      if(associated(NI_pnh3aqv)) &
+         NI_pnh3aqv(i,j,k) = NI_pnh3aqv(i,j,k) &
+         + (GNH3 / fmmr_to_conc - NH3(i,j,k)) &
+          * delp(i,j,k)/grav/cdt
+      if(associated(NI_phno3aqv)) &
+         NI_phno3aqv(i,j,k) = NI_phno3aqv(i,j,k) &
+         + (GNO3 / fmmr_to_conc - (xhno3(i,j,k)*fMassHNO3/fMassAir)) &
+          * delp(i,j,k)/grav/cdt
+
+
 
 !     Unit conversion back on return from thermodynamic module
       NH3(i,j,k)    = GNH3 / fmmr_to_conc