#Stratospheric age spectra from Andrews et al., JGR,106, D10, 10257-10274, May 27, 2001.
#Age spectra corresponding to 1D-bimodal fits to 2D Model spectra from Jones et al., 2001
#(same issue) are also provided.
#
#Rows correspond to N2O values used as a pseudo-vertical coordinate and provided in the 
#file n2o_levels_andrews2001.txt.  
#
#Columns correspond to transit times from the tropical tropopause in years, and are 
#provided in the file transit_time_years.txt. Files contain transit times up to 100 years.
#For the andrews2001_2pk and jones_2001_2pk fit cases, integration over a period of 12
#years is sufficient to compute mean age and for co2 convolutions.  For andrews2001_1pk 
#case, integration over 50-100 years is needed to resolve the long tail.