For timeslice "spAer" experiments : piClim-spAer-aer and piClim-spAer-anthro 
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The value of MAC aerosols for year 2014 must be used during the entire run.
The year range for the simulation is 2014-2043.
MAC aerosols only have values until year 2016, and values for the last 3 years (2014-2016) are equal.

In order to use the 2014(=2015=2016) value the whole run :

1/ change one line in the LMDZ file :
modipsl/modeles/LMDZ/libf/phylmd/macv2sp.F90 

as follows :
line 81 : 
year_fr = FLOAT(year_cur) + (FLOAT(day_cur)-0.5) / FLOAT(year_len)

becomes :
year_fr = FLOAT(2015) + (FLOAT(day_cur)-0.5) / 365. 

2/ Recompile the model