WG ACV

Ad-hoc Working Group on Atmospheric Composition Vocabulary (WG-ACV)

The goal of this group, established by the TT-WIGOSMD, is to improve the WIGOS vocabulary for atmospheric composition and make it interoperable with other vocabularies.

Members

Jörg Klausen (@joergklausen)
Gao Chen (@gaochen-larc)
Richard Eckman
Franziska Stürzl (@fstuerzl)
Markus Fiebig (@markusfiebig)
Sebastien Villaume (@sebvi)
Dagmar Kubistin (@dkubisti)
Rebecca Hornbrook (@rhornbrook)
John Nowak (@jbnowak-larc)
Charles Brock (@charlesabrock)
Ellsworth Judd Welton (@ejwelton)

Meetings

Notes from past meetings

Next Meeting

10 May 2021, 13 - 14.30 UTC

Agenda:

Welcome (5')
Approval of minutes (5')
Progress on issues
1. #277 1-06-01 New code list "Domain"
2. #278 1-06-01 New code list "Matrix" -> Proposals for other entries (with definition)?
3. #275 1-01-01 Addition of variables from WDCGG -> confirmation by experts required
4. #270 6-01-01 Creation of a new code table ParticleSizeRange -> a few more reviews needed, discuss question regarding "Hygroscopic growth factor, x μm equivalent" variable
5. #280 1-01-01 Remove particle size range from variable name -> revision of branch needed
6. #261 Discussion on Gas phase variables -> reminder: revision of variable description and list of tags needed, next step: assign tags to variables
7. #257 1-01-01 Path structure and tags of Aerosol (particle phase) composition variables -> revision of tags needed
Next meeting
1. suggested: 19 May, 12-13:30 UTC

Later

Presentation on GCMD

Objectives of WG-ACV

Overview

The main objective of this group is to improve the vocabulary on atmospheric composition. This vocabulary is used in the WIGOS metadata representation. The overarching objective of the WIGOS metadata standard, for which the WIGOS metadata representation provides the information model, is to 'document observations to enable adequate use'. Therefore, the WIGOS information model endeavors to capture the characteristic aspects of an observation.

Specific tasks

Variables and path structures of atmospheric variables (Code table for observed variables with domain "Atmosphere": 1-01-01)
- Review existing subdomains
- Identify missing variables and suggest how they can be organized
- Provide descriptions that define the variables unambiguously
Sampling attributes and method details
- Identify the key attributes of the process of observation that determine the result

Information model of WIGOS metadata

The information of WIGOS is a profile of ISO/OGC Observations and Measurements (O&M). It models an observation as a combination of various aspects of an observation that may influence the result, combined here using an operator 'x' (the current focus of WG-ACV are the aspects marked in bold):

observation = observed variable x geometry x procedure
observed variable = domain x subdomain(s) x variable
domain = {Atmosphere|Terrestrial|Earth|Ocean|Outer Space}
subdomain(s) = groupings of variables providing more context
variable = biogeochemical species or physical quantity
geometry = {point|line|area|volume|vertical profile|total column} as defined in Geometry
procedure = sampling x processing x reporting
sampling = size cut-off x sizing methodology x pressure x temperature x humidity x wavelength/frequency
processing = sample treatment x method x method details x instrument (x operator)
method = bio/physico/chemical principle used to make the observation
method details = free text describing specifics of the method of observation
instrument = manufacturer x model x serial number
operator = an individual involved in making the observation
reporting = pressure x temperature x humidity x unit x ...

Current organization of variables in the atmospheric domain

Domain	Subdomain_1	Subdomain_2	Subdomain_3	Comment
Atmosphere	Aerosol			Proposal to change the term "Aerosol" to "Particle phase": #181; Aerosol typing from remote sensing: #258
Atmosphere	Aerosol	Composition		Branch overstructured? #257
Atmosphere	Aerosol	Composition	Inorganic anions
Atmosphere	Aerosol	Composition	Inorganic carbonaceous
Atmosphere	Aerosol	Composition	Inorganic cations
Atmosphere	Aerosol	Composition	Inorganic nitrogen species
Atmosphere	Aerosol	Composition	Major inorganic components
Atmosphere	Aerosol	Composition	Organic anions
Atmosphere	Aerosol	Composition	Organic carbonaceous
Atmosphere	Aerosol	Composition	Trace elements
Atmosphere	Aerosol	Optical properties
Atmosphere	Aerosol	Physical properties - primary		Distinction between primary and secondary physical particle properties #182
Atmosphere	Aerosol	Physical properties - primary	Volcanic ash
Atmosphere	Aerosol	Physical properties - primary	Dust
Atmosphere	Aerosol	Physical properties - secondary
Atmosphere	Gas			General questions and discussion: #261
Atmosphere	Gas	Greenhouse gas
Atmosphere	Gas	Greenhouse gas	CFCs
Atmosphere	Gas	Greenhouse gas	Halocarbons
Atmosphere	Gas	Greenhouse gas	Halon
Atmosphere	Gas	Greenhouse gas	HCFCs
Atmosphere	Gas	Greenhouse gas	HFCs
Atmosphere	Gas	Greenhouse gas	PFCs
Atmosphere	Gas	Other gas
Atmosphere	Gas	Ozone
Atmosphere	Gas	Reactive gas
Atmosphere	Gas	Reactive gas	Nitrogen containing compounds
Atmosphere	Gas	Reactive gas	Sulfur containing compounds
Atmosphere	Gas	Reactive gas	VOC
Atmosphere	POPs
Atmosphere	POPs	PAH
Atmosphere	POPs	POP
Atmosphere	Radionuclide			New variables: #212
Atmosphere	Total Atmospheric Deposition
Atmosphere	Total Atmospheric Deposition	Inorganic acid
Atmosphere	Total Atmospheric Deposition	Inorganic anions
Atmosphere	Total Atmospheric Deposition	Inorganic cations
Atmosphere	Total Atmospheric Deposition	Inorganic nitrogen species
Atmosphere	Total Atmospheric Deposition	Organic acid
Atmosphere	Total Atmospheric Deposition	Trace elements

Priorities of WG-ACV

The following issues were identified as priorities:

For ideas regarding sampling attributes (code tables for e. g. size range), please feel free to edit this page: Overview of observations and sampling procedures

All issues related to this working group can be found here: Project on GitHub