diff --git a/Externals.cfg b/Externals.cfg
index ae434f268e..c9b77c9691 100644
--- a/Externals.cfg
+++ b/Externals.cfg
@@ -30,7 +30,7 @@ required = True
local_path = cime
protocol = git
repo_url = https://github.com/ESMCI/cime
-tag = branch_tags/cime5.6.15_a01
+tag = cime5.6.16
required = True
[externals_description]
diff --git a/bld/namelist_files/namelist_defaults_clm4_5.xml b/bld/namelist_files/namelist_defaults_clm4_5.xml
index e9e222db82..678bf29b57 100644
--- a/bld/namelist_files/namelist_defaults_clm4_5.xml
+++ b/bld/namelist_files/namelist_defaults_clm4_5.xml
@@ -727,16 +727,11 @@ lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_4x5_hist_16pfts_Irrig_CMIP6_sim
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_10x15_hist_16pfts_Irrig_CMIP6_simyr2000_c190214.nc
-
-lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_ne120np4_hist_16pfts_Irrig_CMIP6_simyr2000_c190304.nc
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_ne30np4_hist_16pfts_Irrig_CMIP6_simyr2000_c190303.nc
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_ne16np4_hist_16pfts_Irrig_CMIP6_simyr2000_c190214.nc
-
-lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_conus_30_x8_hist_16pfts_Irrig_CMIP6_simyr2000_c190128.nc
-
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_5x5_amazon_hist_16pfts_Irrig_CMIP6_simyr2000_c190214.nc
@@ -760,16 +755,11 @@ lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_1x1_numaIA_hist_78pfts_CMIP6_si
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_1x1_smallvilleIA_hist_78pfts_CMIP6_simyr2000_c190214.nc
-
-lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_ne120np4_hist_78pfts_CMIP6_simyr2000_c190304.nc
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_ne30np4_hist_78pfts_CMIP6_simyr2000_c190303.nc
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_ne16np4_hist_78pfts_CMIP6_simyr2000_c190214.nc
-
-lnd/clm2/surfdata_map/surfdata_conus_30_x8_hist_78pfts_CMIP6_simyr2000_c190128.nc
-
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_1x1_camdenNJ_hist_16pfts_Irrig_CMIP6_simyr2000_c190214.nc
@@ -797,14 +787,9 @@ lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_4x5_hist_16pfts_Irrig_CMIP6_sim
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_1x1_brazil_hist_16pfts_Irrig_CMIP6_simyr1850_c190214.nc
-
-lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_ne120np4_hist_16pfts_Irrig_CMIP6_simyr1850_c190304.nc
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_ne30np4_hist_16pfts_Irrig_CMIP6_simyr1850_c190303.nc
-
-lnd/clm2/surfdata_map/surfdata_conus_30_x8_hist_16pfts_Irrig_CMIP6_simyr1850_c190128.nc
-
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_48x96_hist_78pfts_CMIP6_simyr1850_c190214.nc
@@ -825,14 +810,9 @@ lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_1x1_numaIA_hist_78pfts_CMIP6_si
lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_1x1_brazil_hist_78pfts_CMIP6_simyr1850_c190214.nc
-
-lnd/clm2/surfdata_map/release-clm5.0.18/surfdata_ne120np4_hist_78pfts_CMIP6_simyr1850_c190304.nc
lnd/clm2/surfdata_map/landuse.timeseries_ne30np4_hist_16pfts_Irrig_CMIP6_simyr1850-2015_c170824.nc
-
-lnd/clm2/surfdata_map/surfdata_conus_30_x8_hist_78pfts_CMIP6_simyr1850_c190128.nc
-
lnd/clm2/surfdata_map/surfdata_0.9x1.25_hist_16pfts_nourb_CMIP6_simyrPtVg_c181114.nc
@@ -853,14 +833,9 @@ lnd/clm2/surfdata_map/surfdata_conus_30_x8_hist_78pfts_CMIP6_simyr1850_c190128.n
lnd/clm2/surfdata_map/landuse.timeseries_1x1_brazil_hist_16pfts_Irrig_CMIP6_simyr1850-2015_c170824.nc
-lnd/clm2/surfdata_map/landuse.timeseries_ne120np4_hist_16pfts_Irrig_CMIP6_simyr1850-2015_c1908304.nc
lnd/clm2/surfdata_map/landuse.timeseries_ne30np4_hist_16pfts_Irrig_CMIP6_simyr1850-2015_c170824.nc
-lnd/clm2/surfdata_map/landuse.timeseries_conus_30_x8_hist_16pfts_Irrig_CMIP6_simyr1850-2015_c181003.nc
-
lnd/clm2/surfdata_map/landuse.timeseries_1x1_numaIA_hist_78pfts_CMIP6_simyr1850-2015_c170917.nc
-lnd/clm2/surfdata_map/landuse.timeseries_ne120np4_hist_78pfts_CMIP6_simyr1850-2015_c190304.nc
lnd/clm2/surfdata_map/landuse.timeseries_ne30np4_hist_78pfts_CMIP6_simyr1850-2015_c179824.nc
-lnd/clm2/surfdata_map/landuse.timeseries_conus_30_x8_hist_78pfts_CMIP6_simyr1850-2015_c181004.nc
-
2015
-2100
+2101
2015
2015
-2100
+2101
2015
2010
@@ -2009,80 +1979,6 @@ lnd/clm2/surfdata_map/surfdata_conus_30_x8_hist_78pfts_CMIP6_simyr1850_c190128.n
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