diff --git a/data/downloads/odp-ftp-greenland-ice.sh b/data/downloads/odp-ftp-greenland-ice.sh
index e9fc5f71f..228cc1693 100755
--- a/data/downloads/odp-ftp-greenland-ice.sh
+++ b/data/downloads/odp-ftp-greenland-ice.sh
@@ -23,6 +23,23 @@ curl --silent $BASE_URL"RT_XO_2005_2009.nc" > $OUTPUT_FODLER/2009-01-01.nc
 curl --silent $BASE_URL"RT_XO_2006_2010.nc" > $OUTPUT_FODLER/2010-01-01.nc
 curl --silent $BASE_URL"AT_XO_2007_2011.nc" > $OUTPUT_FODLER/2011-01-01.nc
 
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/1996-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/1997-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/1998-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/1999-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2000-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2001-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2002-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2003-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2004-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2005-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2006-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2007-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2008-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2009-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2010-01-01.nc --variable SEC
+python ./data/drop-unused-vars.py --file $OUTPUT_FODLER/2011-01-01.nc --variable SEC
+
 python ./data/add-time-coordinate.py --file $OUTPUT_FODLER/1996-01-01.nc --timestamp 1996-01-01
 python ./data/add-time-coordinate.py --file $OUTPUT_FODLER/1997-01-01.nc --timestamp 1997-01-01
 python ./data/add-time-coordinate.py --file $OUTPUT_FODLER/1998-01-01.nc --timestamp 1998-01-01
diff --git a/data/drop-unused-vars.py b/data/drop-unused-vars.py
index 9299a4e2d..dc24f20d3 100644
--- a/data/drop-unused-vars.py
+++ b/data/drop-unused-vars.py
@@ -8,8 +8,12 @@
 args = parser.parse_args()
 
 ds = xr.open_dataset(args.file, decode_coords=False, decode_cf=False)
-ds_new = ds[args.variable].to_dataset()
-ds_new.attrs = ds.attrs
+
+variables_to_keep = [args.variable, 'lat', 'lon', 'grid_projection']
+
+for key in ds.data_vars:
+  if (key not in variables_to_keep):
+    ds = ds.drop_vars(names=[key])
 
 os.remove(args.file)
-ds_new.to_netcdf(args.file, format='NETCDF4_CLASSIC', mode='w')
+ds.to_netcdf(args.file, format='NETCDF4', mode='w')
diff --git a/data/layers-config.json b/data/layers-config.json
index 8ce72ec79..5118a135c 100644
--- a/data/layers-config.json
+++ b/data/layers-config.json
@@ -268,9 +268,9 @@
     },
     "flyTo": {
       "position": {
-        "height": 15000000.06,
-        "latitude": 90,
-        "longitude": 0
+        "height": 5500000,
+        "latitude": -38.5,
+        "longitude": 72.29
       },
       "orientation": {
         "heading": 0,
diff --git a/data/triggers/greenland_ice_sec.sh b/data/triggers/greenland_ice_sec.sh
index 29c1030c7..acd9faa6d 100755
--- a/data/triggers/greenland_ice_sec.sh
+++ b/data/triggers/greenland_ice_sec.sh
@@ -9,8 +9,8 @@ MIN_LON="-90"
 MAX_LON="7.594643368591434"
 MIN_LAT="58.854580820213855"
 MAX_LAT="84.00492144822202"
-MIN="auto"
-MAX="auto"
+MIN="-5"
+MAX="5"
 MACHINE_TYPE="N1_HIGHCPU_8"
 
 if [ ! -f ./package.json ]; then
diff --git a/data/write-zarr.py b/data/write-zarr.py
index 0d5b43f82..0df537aad 100644
--- a/data/write-zarr.py
+++ b/data/write-zarr.py
@@ -1,5 +1,4 @@
 import sys
-import time
 import cate.ops
 import utility
 from cate.core.ds import DATA_STORE_REGISTRY
@@ -18,7 +17,6 @@
 zoom_levels = args.zoom_levels.split('-')
 
 # add local datastore from NetCDF files
-start_time = time.time()
 local_store = DATA_STORE_REGISTRY.get_data_store('local')
 ds_name = 'data'
 ds_local_name = 'local.' + ds_name
@@ -28,12 +26,7 @@
 # open dataset
 ds = cate.ops.open_dataset(ds_local_name, var_names=args.variable_id)
 data_array = ds[args.variable_id]
-try:
-  units = data_array.attrs['units']
-except KeyError:
-  units = ''
-
-print(f'Opened dataset in {time.time() - start_time}s')
+units = data_array.get('units') or data_array.attrs['Units']
 
 # get min and max values
 try:
@@ -55,10 +48,8 @@
   data_array = data_array.chunk({'lon': shape[2], 'lat': shape[1]})
 
   # write zarr file to disk
-  start_time = time.time()
   print('Writing zarr file...')
   data_array.to_dataset().to_zarr(args.output)
-  print(f'Written zarr in {time.time() - start_time}s')
 
   print('Writing world file...')
   utility.write_world_file(shape, ds.attrs)