Add specific humidity to the ADPUPA BUFR Python Converter

[PraveenKumar-NOAA]

The main goal of this issue is to:

• Extract the specific humidity calculation informations from the prepBUFR codes
• Document them
• Add this to the the ADPUPA BUFR Python Converter
• Run end-to-end tests using global-workflow

[PraveenKumar-NOAA]

The specific humidity informations were extracted from the prepBUFR codes, added to the ADPUPA BUFR Converter. Run the converter and created the IODA/ netCDF file.

The following plots were created for the BUFR and prepBUFR specificHumidity using the IODA/netCDF files created using the BUFR and prepBUFR converters, respectively.

BUFR: specificHumidity

prepBUFR: specificHumidity

[PraveenKumar-NOAA]

Analysis for BUFR data: Total Count: 45594 Max: 0.273 Min: 0.000 Mean: 0.005 Std: 0.008

Analysis for prepBUFR data: Total Count: 32005 Max: 0.027 Min: 0.000 Mean: 0.002 Std: 0.004

It seems that prepBUFR QC reduced the number of obs from 45594 to 32005.

@emilyhcliu please look at this.