add water vapour mixing ratio to atmospheric variables (1-01-01)

[amilan17]

Initial request

OSCAR/Requirements updated Water Vapour mixing ratio in summer of 2024. This issue is an attempt to align with WIGOS metadata codes.

Add water vapour mixing ratio to atmospheric variables (1-01-01)

Amendment details

Name	Description
Water Vapour Mixing Ratio	"3D field of water vapour mixing ratios in the UTLS. Mixing ratio is the mole fraction of a substance in dry air (UTLS, MUS)"

Requestor(s)

GOCS, OSCAR Requirements, @kpremec

Stakeholder(s)

Enter list of stakeholder(s).

Applications or Systems

• OSCAR/Surface
• OSCAR/requirements
• Radar/DB
• OceanOPS
• WHOS
• WDQMS
• GBON Compliance Monitor
• Other

Expected impact of change

None

Collaborators

No response

References

https://space.oscar.wmo.int/variables/view/water_vapour_mixing_ratio

Comments

This may be related to
Water vapour (no definition) which doesn't have a definition.

Publication(s)

Example: Manual on Codes (WMO-No. 306), Volume I.3, WMO Codes Registry, Code table 1-01-01

Validation

No response

[amilan17]

related codes:

notation	path	domains	tags	name	description
46	252	\Atmosphere\Humidity			Integrated water vapour
49	255	\Atmosphere\Humidity			Water vapour pressure
579	12165	\Atmosphere\Humidity		\Atmosphere\Humidity\Water vapour	Water vapour
661	12249	\Atmosphere\Humidity		atmosphere,humidity	Relative humidity (with respect to water)
662	12250	\Atmosphere\Humidity		atmosphere,humidity	Specific humidity

[amilan17]

@kpremec proposes to remove this part of the definition from O/R and the new WIGOS codes.
"Mixing ratio is the mole fraction of a substance in dry air (UTLS, MUS)"

[kpremec]

Proposal is to extract the 2nd sentence "Mixing ratio is the mole fraction of a substance in dry air (UTLS, MUS)" and add it as a note in OSCAR/Requirements.