Name conventions:

All CARIBIC datasets have an "Accronym", which is structured like:

XY_yyyymmdd_AAA_BBB_nnD_Vnn, where:

XY stands for one of the variables (species measured, or other relevant parameters) as summarized in the table below:
CLcloud cover1 
CNcondensation nuclii 
COcarbon monoxide 
ISisotopes and hydrocarbons 
MAmaster board flight parametersto come
NHnon-methane hydrocarbons 
OMozone in situ monitor 
PMposition and meteorology1  
HPhalocarbons 
VGhalocarbons different Instrument 
  1 during whole air sampling intervalls 
yyyy = year (1997 ... 2003, at present, mm = month, dd = day, (see here a list of all regular flights)

AAA = airport "from" / BBB = airport "to", (see here a list of airport codes)

nn = flightno., D = F (foreward) / R (return)

Vnn = Version no. (Dataset update - storage format improved and/or errors removed)