Extracting one subdataset succeeds
gdal_translate -of NetCDF NETCDF:"nc.nc":chla nc_sub.nc
Conversion of this extracted subdataset into GeoTIFF succeeds
gdal_translate -of GTiff NETCDF:"nc.nc":chla nc_sub.tif
Subset files as NetCDF and GeoTIFF can be opened with QGIS
Conversion of the GeoTIFF that is good for QGIS from EPSG:3411 into EPSG:4326 fails:
after some research i did the following:
gdalwarp -s_srs "+proj=eqc +R=1737400" -t_srs "+proj=ortho +lat=90 +lon_0=0 +R=1737400" input.tif output.tif
So basically what caused the error was the -s_srs definition. Since it was the moons dem I had to specify the Radius by +R=1737400. Hope this helps!
The main problem I see is that GDAL does not recognize the CRS/Transform information from the dataset. As such, transforming the dataset is not possible as the original information cannot be detected.
So, you need to construct the CRS/Transform yourself.
Step 0: Get the CRS of the dataset
Based on the link you gave, this should be the CRS of the ...