diff --git a/usermods_dirs/b1850/shell_commands b/usermods_dirs/b1850/shell_commands
deleted file mode 100644
index 8253c71..0000000
--- a/usermods_dirs/b1850/shell_commands
+++ /dev/null
@@ -1,2 +0,0 @@
-./xmlchange OCN_CHL_TYPE=diagnostic
-
diff --git a/usermods_dirs/b1850/user_nl_clm b/usermods_dirs/b1850/user_nl_clm
deleted file mode 100644
index 4c91174..0000000
--- a/usermods_dirs/b1850/user_nl_clm
+++ /dev/null
@@ -1 +0,0 @@
-init_interp_fill_missing_with_natveg = .true.
diff --git a/usermods_dirs/b1850/user_nl_cpl b/usermods_dirs/b1850/user_nl_cpl
index 85e9b9c..ca856f9 100644
--- a/usermods_dirs/b1850/user_nl_cpl
+++ b/usermods_dirs/b1850/user_nl_cpl
@@ -1,2 +1,2 @@
-flux_diurnal=.true.
-
+orb_iyear=1850
+orb_iyear_align=1850
diff --git a/usermods_dirs/b1850_cism/include_user_mods b/usermods_dirs/b1850_cism/include_user_mods
deleted file mode 100644
index b46f5b9..0000000
--- a/usermods_dirs/b1850_cism/include_user_mods
+++ /dev/null
@@ -1 +0,0 @@
-../b1850
\ No newline at end of file
diff --git a/usermods_dirs/b1850_cism/user_nl_cism b/usermods_dirs/b1850_cism/user_nl_cism
deleted file mode 100644
index 502c51c..0000000
--- a/usermods_dirs/b1850_cism/user_nl_cism
+++ /dev/null
@@ -1,5 +0,0 @@
-! The following options keep the ice sheet at its present-day configuration, rather than letting it evolve in time.
-! In this way, CISM essentially acts as a diagnostic component without any effect on the rest of the system.
-! Now defined in CISM1%NOEVOLVE
-!evolve_ice = 0
-!zero_gcm_fluxes = 1