Add ICOS workflow

README.md

@@ -231,6 +231,11 @@ Figure 3: ACTRIS GRES workflow
 ![Workflow IAGOS](img/iagos.atmo-access.workflow.png)
 Figure 4: IAGOS workflow
 
+#### ICOS
+
+![Workflow ICOS](img/icos.atmo-access.workflow.png)
+Figure 4: ICOS workflow
+
 ## Other Requirements
 * Storage of data and metadata must follow GDPR requirements.
 * This system aims to use a common login solution for authentication and authorization in WP5. The authentication and authorization should be done at a higher level, and the specific implementation is not to be considered as a part of this task.