diff --git a/changelog/31.feature.md b/changelog/31.feature.md
new file mode 100644
index 00000000..16060db7
--- /dev/null
+++ b/changelog/31.feature.md
@@ -0,0 +1 @@
+Add test data for each ILAMB/IOMB metric
diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Emon/cSoil/gn/v20191115/cSoil_Emon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Emon/cSoil/gn/v20191115/cSoil_Emon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc
new file mode 100644
index 00000000..7a452dab
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/lai/gn/v20191115/lai_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/lai/gn/v20191115/lai_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc
new file mode 100644
index 00000000..83de0689
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/mrro/gn/v20191115/mrro_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/mrro/gn/v20191115/mrro_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/mrsos/gn/v20191115/mrsos_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/mrsos/gn/v20191115/mrsos_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/nbp/gn/v20191115/nbp_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/nbp/gn/v20191115/nbp_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Ofx/sftof/gn/v20191115/sftof_Ofx_ACCESS-ESM1-5_historical_r1i1p1f1_gn.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Ofx/sftof/gn/v20191115/sftof_Ofx_ACCESS-ESM1-5_historical_r1i1p1f1_gn.nc
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_197901-197912.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_197901-197912.nc
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_198001-198912.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_198001-198912.nc
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_199001-199912.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_199001-199912.nc
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-200912.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-200912.nc
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_201001-201412.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_201001-201412.nc
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diff --git a/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/sos/gn/v20191115/sos_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_197901-201412.nc b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/sos/gn/v20191115/sos_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_197901-201412.nc
new file mode 100644
index 00000000..6e392622
Binary files /dev/null and b/data/CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/sos/gn/v20191115/sos_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_197901-201412.nc differ
diff --git a/registry.txt b/registry.txt
index 5b0d60fb..95ba7d6f 100644
--- a/registry.txt
+++ b/registry.txt
@@ -22,8 +22,20 @@ CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Amon/rsdt/gn/v20191115/rsdt_A
 CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Amon/rsut/gn/v20191115/rsut_Amon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc 8d492ef1f2bb654220fe64977d9942a33af0962ee9afa4017dcc75b6f0103015
 CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Amon/tas/gn/v20191115/tas_Amon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_185001-201412.nc 38e055e57aea5a9ae76ed3fc5325be6783b5694a9edc28aafd24dd462b32e5ce
 CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Amon/ts/gn/v20191115/ts_Amon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc e02530449c92e0ffc72e9edeba57f5d38ab8652a28486c1c2b9ddada1f38fbd9
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Emon/cSoil/gn/v20191115/cSoil_Emon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc bebda54ca0518630e90b79585910fc38b7edfe118ecf1cf4cb4a8de0950a911e
 CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/gpp/gn/v20191115/gpp_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc da36ed1653f7aafe40a4fc9b99004a46cb45231697ce6b3413dfc171980c37df
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/lai/gn/v20191115/lai_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc 972c11880af2cf06c2e1489968b1ac4829d8b00afd7586499814c3ddcfd95ed2
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/mrro/gn/v20191115/mrro_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc aaaf89f7a1dedf79e8cda71ab345a6809cfb698a63dcc638ccf7a316d13e6920
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/mrsos/gn/v20191115/mrsos_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc 4b78059c4f899a48ae6f3a3cf68e95d76e3603044744521c4aadd992dec93995
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Lmon/nbp/gn/v20191115/nbp_Lmon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc 75e559842e9081ea7563f2590d2c1e8a22af72abc78e37a012b9d56da532569e
 CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Ofx/areacello/gn/v20191115/areacello_Ofx_ACCESS-ESM1-5_historical_r1i1p1f1_gn.nc 6808b64c7328bd118537bfb7cfd35748b4e84cae3f6a5586403aa9d8040e4d0b
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Ofx/sftof/gn/v20191115/sftof_Ofx_ACCESS-ESM1-5_historical_r1i1p1f1_gn.nc 9bc037566546b8a65d063c4e8225b43b56151856f5a8adde5992f44c85b7c727
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_197901-197912.nc f068351200f0afb451a0e39e13d5e3ddeb48b1f1812b97a1a786d802659c969c
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_198001-198912.nc 703b495bf2effa5cae369893e2868ae1f38b69510366404e236a4605e6560ae6
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_199001-199912.nc 79a7ef5b61962da66abd14598412ad4f1ba0c9b531e7ecaf5a6190e0a4f9589c
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-200912.nc 001b3e7c639cae224e4de4f14601f492bec7aeb028cd02e9f07812c1db05abb7
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/msftmz/gn/v20191115/msftmz_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_201001-201412.nc 6c6cc432feb33552d643b2a57d0552ac563ec5a90ad462b6daeacdf3e7a9158f
+CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/sos/gn/v20191115/sos_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_197901-201412.nc 92384dba703a6575d696bf8c04337c3a1d4f538bcd9ca28bf61ab058f8038b30
 CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/Omon/tos/gn/v20191115/tos_Omon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_200001-201412.nc 94121a2233aff78ef8799c5d59b6b6f3e7d3f2fb7ceb3a4a1645943ef3e88040
 CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/SImon/siconc/gn/v20200817/siconc_SImon_ACCESS-ESM1-5_historical_r1i1p1f1_gn_197901-201412.nc 886c62a24797e893fe11b8de4d16c8a277bdee931b692d533f2fb3fa39820aa1
 CMIP6/CMIP/CSIRO/ACCESS-ESM1-5/historical/r1i1p1f1/fx/areacella/gn/v20191115/areacella_fx_ACCESS-ESM1-5_historical_r1i1p1f1_gn.nc 4587a7b0110a226a805f681ee9fe456d20ec310302b2c120334c21595e4e96cb
diff --git a/scripts/fetch_test_data.py b/scripts/fetch_test_data.py
index 18c8ecf5..c96ea3d0 100755
--- a/scripts/fetch_test_data.py
+++ b/scripts/fetch_test_data.py
@@ -223,7 +223,18 @@ def process_sample_data_request(
         facets=dict(
             source_id="ACCESS-ESM1-5",
             frequency=["fx", "mon"],
-            variable_id=["areacella", "sftlf", "gpp", "pr"],
+            variable_id=["areacella", "sftlf", "gpp", "pr", "tas", "mrro", "mrsos", "cSoil", "lai", "nbp"],
+            experiment_id=["historical"],
+        ),
+        remove_ensembles=True,
+        time_span=("2000", "2025"),
+    ),
+    # IOMB data
+    CMIP6Request(
+        facets=dict(
+            source_id="ACCESS-ESM1-5",
+            frequency=["fx", "mon"],
+            variable_id=["areacello", "sftof", "tos", "sos", "msftmz"],
             experiment_id=["historical"],
         ),
         remove_ensembles=True,
diff --git a/src/ref_sample_data/data_request/cmip6.py b/src/ref_sample_data/data_request/cmip6.py
index 445458ac..753be6bb 100644
--- a/src/ref_sample_data/data_request/cmip6.py
+++ b/src/ref_sample_data/data_request/cmip6.py
@@ -106,6 +106,9 @@ def decimate_dataset(self, dataset: xr.Dataset) -> xr.Dataset | None:
         has_latlon = "lat" in dataset.dims and "lon" in dataset.dims
         has_ij = "i" in dataset.dims and "j" in dataset.dims
 
+        # The AMOC variable `msftmz` has these strange dims and we do not want to decimate
+        skip_decimate = {"time", "basin", "lev", "lat"}.issubset(dataset.dims)
+
         if has_latlon:
             assert len(dataset.lat.dims) == 1 and len(dataset.lon.dims) == 1
 
@@ -113,6 +116,8 @@ def decimate_dataset(self, dataset: xr.Dataset) -> xr.Dataset | None:
         elif has_ij:
             # 2d curvilinear grid (generally ocean variables)
             result = decimate_curvilinear(dataset)
+        elif skip_decimate:
+            result = dataset
         else:
             raise ValueError("Cannot decimate this grid: too many dimensions")