concOA and concBC not read from EBAS on NIRD

[andrearosendahl]

When running pyareocom with concoa and concbc as variables and EBAS as observations, I get an error that it cannot read the EBAS observations, see below for example of the message I get. The error seems to be the same for both variables. Other variables (such as concso2 and concso4) are fine.

pyaerocom version: pyaerocom==0.37.0

Example from running pyaerocom:

For concoa:
Skipping reading of EBAS NASA Ames file: /projects/NS9560K/diagnostics/AeroVal/obs/EBASMultiColumn/data/data/NO0039R.20150105070000.20240416141732.low_vol_sampler.organic_carbon.pm10.52w.1w.NO01L_kfg_no39_pm10.NO01L_NILU_sunset_002.lev2.nas. Reason: ValueError("Unable to parse chemical formula 'OA'")

For concbc:
Skipping reading of EBAS NASA Ames file: /projects/NS9560K/diagnostics/AeroVal/obs/EBASMultiColumn/data/data/FR0009R.20140101090000.20160426000000.high_vol_sampler..pm25.1y.6d.FR12L_Digitel_DHA80_09.FR12L_IC.lev2.nas. Reason: ValueError("Unable to parse chemical formula 'BC'")

[jgriesfeller]

Additional info:
Trying to read the data via the command line using the caching infrastructure (pyaerocom_cachegen --vars concoa -o EBASMC) makes this reproducible easily