Z: above sea level height in m
M80: Dry SSA mass concentration in μg/m^3 as resulted by the M80 simulations
L18: Dry SSA mass concentration in μg/m^3 as resulted by the L18 simulations
Liric: Estimated dry SSA mass concentration using LIRIC data
Liric+unc & Liric-unc: Estimated dry SSA mass concentration using LIRIC data adding & subtracting the LIRIC uncertainty