diff --git a/io/post_nems_routines.F90 b/io/post_nems_routines.F90
index 877558015..8a4709b87 100644
--- a/io/post_nems_routines.F90
+++ b/io/post_nems_routines.F90
@@ -231,7 +231,7 @@ subroutine read_postnmlt(kpo,kth,kpv,po,th,pv,post_namelist)
                              lsmdef,ALSL,me,d3d_on,gocart_on,hyb_sigp,&
                              pthresh,novegtype,ivegsrc,icu_physics,   &
                              isf_surface_physics,modelname,submodelname,&
-                             rdaod,d2d_chem,nasa_on,gccpp_on
+                             rdaod,d2d_chem,nasa_on,gccpp_on,method_blsn
       use upp_ifi_mod, only: write_ifi_debug_files
 !
 !    revision history:
@@ -249,7 +249,7 @@ subroutine read_postnmlt(kpo,kth,kpv,po,th,pv,post_namelist)
 
       namelist/nampgb/kpo,po,kth,th,kpv,pv,popascal,d3d_on,gocart_on,  &
                       hyb_sigp,write_ifi_debug_files,rdaod,nasa_on,gccpp_on, &
-                      d2d_chem
+                      method_blsn,d2d_chem
       namelist/model_inputs/modelname,submodelname
 !---------------------------------------------------------------------
 !
@@ -270,6 +270,7 @@ subroutine read_postnmlt(kpo,kth,kpv,po,th,pv,post_namelist)
       nasa_on     = .false.
       gccpp_on    = .false.
       d2d_chem    = .false.
+      method_blsn = .true. 
 !
       if (me == 0) print *,'post_namelist=',post_namelist
 !jw post namelist is using the same file itag as standalone post
diff --git a/upp b/upp
index 1a16f94d2..8d41f98e6 160000
--- a/upp
+++ b/upp
@@ -1 +1 @@
-Subproject commit 1a16f94d20898ff2ffcc3c8b6e036a9a16ed19a4
+Subproject commit 8d41f98e66ea858c163a387aaa0c6179851a1466