Context Navigation

Changes between Version 30 and Version 31 of GeneralImplementationConcept

v30	v31
42	42
43	43	[[Image(//pics/DAextension_offline-online_V3.png)]]
44		[[BR]]'''Figure 2:''' Left: offline-coupled DA system with separate programs for model and assimilation; right: online-coupled DA system using model ~~extended by~~ data assimilation functionality. The blue boxes shows functionality of the model, while the green boxes are subroutines executed for PDAF (the names are explained in the pages explaining the two modes. They are linked on the bottom of the page).
	44	[[BR]]'''Figure 2:''' Left: offline-coupled DA system with separate programs for model and assimilation; right: online-coupled DA system using model with attached data assimilation functionality. The blue boxes shows functionality of the model, while the green boxes are subroutines executed for PDAF (the names are explained in the pages explaining the two modes. They are linked on the bottom of the page).
45	45
46	46	PDAF supports both the online and offline modes. The online mode is usually more efficient on parallel computers, since less files have to be written to disks and the model does not need to be restarted after the analysis step. However, the required programming is simpler for the offline more than the online mode, since no modification to the model source code is necessary.