Changes between Version 15 and Version 16 of Documentation/UserGuide/FutureTime

Timestamp:

2016-11-27T10:30:08+01:00 (7 years ago)

Author:

luyssaert

Comment:

--

Documentation/UserGuide/FutureTime

@@ -281 +281 @@
 }}}
 
+Because we don't want to get extra variation from using different nudging files (and thus possibly different phases in NAO) we use the same present day wind fields in the past, present and future experiment. This implies that we will have to tell the model that when according to its internal clock it is 2101 it should use the wind fields of 1981. For this Open .../libIGCM/libIGCM_config/libIGCM_config.ksh and search for the phrase '# BEGIN: SHOULD GO IN A FUNCTION FROM libIGCM_date.ksh'. Then add: 
+{{{
+# First year for nudged wind fields 1980 = 2101 - 120
+year_nudge=$((year - 120))
+}}}
+
+Return to COMP/lmdz.card and make sure the model uses year_nudge instead of year (only for the wind fields)
+{{{
+[BoundaryFiles]
+List= (${R_BC}/ATM/${config_UserChoices_TagName}/${RESOL_ATM}/NUDGE_FILES/ERAI/${year_nudge}/u_${year_nudge}${month}_erai.nc, u.nc),\
+      (${R_BC}/ATM/${config_UserChoices_TagName}/${RESOL_ATM}/NUDGE_FILES/ERAI/${year_nudge}/v_${year_nudge}${month}_erai.nc, v.nc)
+}}}
+
+ 
+
+
 The aerosols have to be interpolated to the zoomed model grid. The years 1980-2000 for HISTORIQUE run version _v5 have been done. They are found at the standard place : /ccc/work/cont003/dsm/p86ipsl/IGCM/BC/ATM/LMDZ/LMD128118/AR5/HISTORIQUE . You need to change _v3 into _v5 in lmdz.card to use these files. Similar to the pre-industrial run in which we only used the aerosols of 1860 we will now only use the aerosols of 2000 to avoid adding more variability to the present day runs compared to the pre-industrial run. Because we want to calculate the net climate effect of both biogeochemical and biophysical effects of forest manangement and land cover change, we have to recalculate the atmospheric CO2 concentration for the different treatments. To do so we first applied the BERN2.5 box model to account for the equilibrium between the atmosphere, the land and the oceans (thus the reason why ~40% of the emissions stay in the atmosphere). Following we converted this CO2 uptake/release into a change in atmospheric CO2 concentration. Finally, this change was subtracted from the present day atmospheric CO2. Note that $$$ below should be name of the optimised scenario depending on the experiment.   
 {{{
@@ -288 +304 @@
 
 [BoundaryFiles]
-List= (${R_BC}/ATM/${config_UserChoices_TagName}/${RESOL_ATM}/NUDGE_FILES/ERAI/${year}/u_${year}${month}_erai.nc, u.nc),\
-      (${R_BC}/ATM/${config_UserChoices_TagName}/${RESOL_ATM}/NUDGE_FILES/ERAI/${year}/v_${year}${month}_erai.nc, v.nc)
+List= (${R_BC}/ATM/${config_UserChoices_TagName}/${RESOL_ATM}/NUDGE_FILES/ERAI/${year_nudge}/u_${year_nudge}${month}_erai.nc, u.nc),\
+      (${R_BC}/ATM/${config_UserChoices_TagName}/${RESOL_ATM}/NUDGE_FILES/ERAI/${year_nudge}/v_${year_nudge}${month}_erai.nc, v.nc)
 
 # With AR5 aerosols (including ASSO4M(=SO4), CSSO4M, AIBCM, ASBCM, AIPOMM, ASPOMM, ASSSM, CSSSM, SSSSM, CIDUSTM)
 # With AR5 ozone(tropo + strato from LMDZOR-INCA-REPROBUS simulations)
-ListNonDel= (/ccc/work/cont003/dofoco/dofoco/INPUT_FILES/ATM_COMP/SOLAR_ACTUAL.txt, SOLARANDVOLCANOES.txt),\
+ListNonDel= (/ccc/work/cont003/dofoco/dofoco/INPUT_FILES/ATM_COMP/SOLAR_FUTURE.txt, SOLARANDVOLCANOES.txt),\
     (/ccc/work/cont003/dofoco/dofoco/INPUT_FILES/ATM_COMP/CO2_RCP45_$$$.txt, CO2.txt),\
     (/ccc/work/cont003/dofoco/dofoco/INPUT_FILES/ATM_COMP/CH4_RCP45.txt, CH4.txt),\