Changes between Version 19 and Version 20 of Documentation/UserGuide/PresentDay

Timestamp:

2015-02-11T22:43:27+01:00 (9 years ago)

Author:

nvuilsce

Comment:

--

Documentation/UserGuide/PresentDay

@@ -1 +1 @@
 = Setting up a coupled climate run for present day conditions = 
-Before setting up a present day simulation, a pre-industrial run will be required to check the radiation balance at the top of the atmosphere. You can find some extra information on the topic at http://forge.ipsl.jussieu.fr/orchidee/wiki/HowTo/VerifyClimate. The basic idea is that for a pre-industrial run the net radiation at the top of the atmosphere should be close to zero. If this is not the case then the albedo of the oceans can be adjusted to mimic several atmospheric processes which are not accounted for. The setting of the variable pmagic that was required to produce a pre-industrial run with zero net-radiation at the top of the atmosphere is also the value for pmagic that needs to used in the present day simulation.  
+Before setting up a present day simulation, a pre-industrial run will be required to check the radiation balance at the top of the atmosphere. You can find some extra information on the topic at http://forge.ipsl.jussieu.fr/orchidee/wiki/Documentation/VerifyClimate. The basic idea is that for a pre-industrial run the net radiation at the top of the atmosphere should be close to zero. If this is not the case then the albedo of the oceans can be adjusted to mimic several atmospheric processes which are not accounted for. The setting of the variable pmagic that was required to produce a pre-industrial run with zero net-radiation at the top of the atmosphere is also the value for pmagic that needs to used in the present day simulation.  
 
 Background of this set-up: The aim is to run a 20 year long equilibrium simulation for the year 2011. Orchidee off-line line was used to simulate the surface area in 2011 and now we want to know how the climate looked liked for such a surface. The coupled run is zoomed over Europe, nudged at the edges of Europe uses the CWRR (a.k.a. 11-layer) hydrology and all the DOFOCO features. A set of coupled pre-industrial runs demonstrated that the net-radiation at the top of the atmosphere was close to zero (0.2 Wm2 over 15 years with a monthly std 5.4 Wm2 for a pmagic = 0.000).