diff --git a/GEOSldas_App/GEOSldas_HIST.rc b/GEOSldas_App/GEOSldas_HIST.rc
index 03eebb0..b0ef0ba 100644
--- a/GEOSldas_App/GEOSldas_HIST.rc
+++ b/GEOSldas_App/GEOSldas_HIST.rc
@@ -24,6 +24,7 @@ COLLECTIONS:
 #                'const_2d_lnd_Nx'
 #                'tavg24_2d_glc_Nx'
 #                'tavg24_1d_glc_Nt'
+#                'tavg24_1d_issm_Nt'
            ::
 
 # --------------------------------------------------------------------------------------------------
@@ -530,6 +531,7 @@ EASEv2_M36.LM:           1
                                 'ALBNF'       , 'LANDICE' ,  'ALBNF_GL'           ,
                                 'ASNOW_GL'    , 'LANDICE' ,
                                 'DELTS'       , 'LANDICE' ,
+                                'ICESMB'      , 'LANDICE' ,
                                 'DNICFLX'     , 'LANDICE' ,
                                 'EVAPOUT'     , 'LANDICE' ,
                                 'QH'          , 'LANDICE' ,
@@ -580,4 +582,18 @@ EASEv2_M36.LM:           1
                                 'WESNBOT'     , 'LANDICE' ,
                                 'WESNEXT'     , 'LANDICE' ,
                                  ::
+
+  tavg24_1d_issm_Nt.descr:         'Tile-space,Daily,Time-Averaged,Single-level,ISSM Diagnostics',
+  tavg24_1d_issm_Nt.nbits:         12,
+  tavg24_1d_issm_Nt.template:      '%y4%m2%d2_%h2%n2z.nc4' ,
+  tavg24_1d_issm_Nt.mode:          'time-averaged' ,
+  tavg24_1d_issm_Nt.format:        'CFIO',
+  tavg24_1d_issm_Nt.frequency:      240000 ,
+  tavg24_1d_issm_Nt.ref_time:       000000 ,
+  tavg24_1d_issm_Nt.fields:      'ICESURF'    , 'ISSM' ,
+                                 'ICETHICK'   , 'ISSM' ,
+                                 'ICEVEL'     , 'ISSM' ,
+                                 'ICESMB'     , 'ISSM' ,
+                                 ::
+
 # ========================== EOF ==============================================================
diff --git a/GEOSldas_App/GEOSldas_LDAS.rc b/GEOSldas_App/GEOSldas_LDAS.rc
index 8ca6018..c71fd82 100644
--- a/GEOSldas_App/GEOSldas_LDAS.rc
+++ b/GEOSldas_App/GEOSldas_LDAS.rc
@@ -36,6 +36,23 @@ CATCHMENT_SPINUP: 0
 #
 LSM_CHOICE: 1
 
+# ---- Ice-Sheet and Sea-Level System Model (ISSM) initialization (for LANDICE tiles)
+#
+#    The first two parameters are arguments needed to initialize ISSM: 
+#
+#    *ISSM_EXPDIR points to the directory containing the ISSM input file, which will be 
+#     replaced by a restart directory in the future
+#
+#    *ISSM_EXPNAME is the name of the binary input file (ISSM_EXPNAME.bin) and PETSc 
+#     options file (ISSM_EXPNAME.toolkits)
+#
+#    Because we can't yet output variables defined on ISSM's mesh via HISTORY 
+#    (e.g., via a mesh tilespace), we also have a temporary fix that will be 
+#    eventually removed (note that output on the attached grid or landice tiles
+#    does still work as expected):     
+# 
+ISSM_EXPDIR: /discover/nobackup/agstubbl/GEOS/Experiments/LDAS-ISSM-dailytest/issm
+ISSM_EXPNAME: GreenlandGEOS
 
 # ---- Choice of tile type(s)
 #