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WIGOS Metadata Standard: Semantic standard and code tables
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1-01-01 Observed variables (atmosphere), corrections #253

Closed fstuerzl closed 2 years ago

fstuerzl commented 3 years ago

Branch

Summary and Purpose Variables in \Atmosphere\Gas Branch need to be corrected.

Stakeholder(s) @joergklausen

Proposal Correct names and paths and add descriptions as follows (changes indicated in bold): notation path name description
283 \Atmosphere\Gas\Reactive Gas\CHCl3 (trichloromethane, chloroform) CHCl3 (trichloromethane, chloroform) IUPAC: chloroform, PubChem CID: 6212, CAS Number: 67-66-3, in gas phase
489 \Atmosphere\Gas\Reactive Gas\VOC\CH2O (methanal, formaldehyde) CH2O (methanal, formaldehyde) IUPAC: formaldehyde, PubChem CID: 712, CAS Number: 50-00-0, in gas phase
536 \Atmosphere\Gas\Greenhouse Gas\ HFCs\C2H3F3 (1,1,1-trifluoroethane, HFC-143a) C2H3F3 (1,1,1-trifluoroethane, HFC-143a) IUPAC: 1,1,1-trifluoroethane, PubChem CID: 9868, CAS Number: 420-46-2, in gas phase

Reason The terms trichloromethane and methanol were missing in the names for variables 283 and 489. Variable 536 C2H3F3 is a HFC, and not a HCFC. This should be changed in the variable name and path.

sebvi commented 3 years ago

@fstuerzl just a quick comment: methanol is not correct. The chemical formula of methanol is CH3OH, maybe you intended to write methanal which is the other name of formaldehyde?

fstuerzl commented 3 years ago

Merci, @sebvi! That's right of course. I've edited the proposal.

gaochen-larc commented 3 years ago

One question: Is "reactive gas" definition based on atmospheric lifetime? CH2O's lifetime is a few hours and CHCl3's lifetime is a few months. The both classified as reactive gas.

joergklausen commented 3 years ago

The complement is 'greenhouse gas', and 'other gas'. It is the conventional way of grouping gases in GAW. 'Other gas' only lists hydrogen, which is traditionally dealt with by the SAG GHG. This is how this grouping came about ... there may be better ways of organizing this, and good ideas are of course welcome.

gaochen-larc commented 3 years ago

The complement is 'greenhouse gas', and 'other gas'. It is the conventional way of grouping gases in GAW. 'Other gas' only lists hydrogen, which is traditionally dealt with by the SAG GHG. This is how this grouping came about ... there may be better ways of organizing this, and good ideas are of course welcome.

"Other gas" branch will eliminate the lifetime issue. The only downside is this category will have a very large number of compounds. We may try to group trace gases by composition, like nitrogen, sulfur. The carbon compounds need additional branches, like alkane, alkene... NASA GCMD has a similar scheme. We followed this scheme: https://www-air.larc.nasa.gov/missions/etc/AtmosphericCompositionVariableStandardNames.pdf .

gaochen-larc commented 3 years ago

Variable name, molecular formula, PubChem CID, and CAS number are confirmed. Thank you Franziska!

The upper level branch structure needs to be discussed.

joergklausen commented 3 years ago

Structure confirmed, branch confirmed, please proceed. NB: The overall organization of variables in the sub-domain 'gas' is currently under review. At present, the paths are neither included in the codes registry nor in the description, so these changes can be made independently.

fstuerzl commented 3 years ago

To move forward with this issue, we need another confirmation. @dkubisti, could you also take a look at the branch, please, and state, whether the changes (aside from the paths) are correct?

dkubisti commented 3 years ago

Yes, I confirm variable name, molecular formula, PubChem CID, and CAS number. Thank you.

amilan17 commented 3 years ago

ready for FT