Update README.md

README.md

@@ -83,6 +83,12 @@ Download the content of /DataEnvironment/resources and copy it into the folder [
     └── CMEMS-MedSea_Reanalysis_Phys_006_004_0to210m_1987-2015_1m_votemper_vosaline_SampleLoc.nc
 ```
 
+### 2.2.a data file sources
+
+* Chlorophyll : https://www.bio-oracle.org
+* Habitat     : https://www.emodnet-seabedhabitats.eu
+* Salinity    : GEOMAR
+* Temperature : GEOMAR
 
 # 3. Reporting bugs