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WIGOS Metadata Standard: Semantic standard and code tables
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1-01-01 Addition of new particle phase variables and variable descriptions #289

Closed fstuerzl closed 3 years ago

fstuerzl commented 3 years ago

Branch

https://github.com/wmo-im/wmds/blob/issue289/tables_en/1-01-01.csv

Summary and Purpose

Variables for optical and physical properties of particle phase are missing in the codes list. In other cases variables are not properly defined or need a more precise name.

Stakeholder(s)

WG ACV

Proposal

New variables:

notation name description matrix tags
new id Particle light extinction coefficient A measure of light attenuation due to scattering and absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance Particle phase Optical properties
new id Particle single scattering albedo Ratio of particle scattering coefficient to particle extinction coefficient or sum of particle absorption and scattering coefficients. Particle phase Optical properties
new id Ångström exponent for particle light extinction A measure of dependence of the particle light extinction coefficient on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for particle light scattering A measure of dependence of the particle light scattering coefficient on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for particle light absorption A measure of dependence of the particle light absorption coefficient on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for aerosol optical depth A measure of dependence of the aerosol optical depth on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for aerosol absorption optical depth A measure of dependence of the aerosol absorption optical depth on wavelength expressed in power law relationship. Particle phase Optical properties
new id Particle Surface Area Size Distribution Particle surface area concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties
new id Particle Volume Size Distribution Particle volume concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties
new id Particle Mass Size Distribution Particle mass concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties
new id Hygroscopic particle size growth factor A scaling factor describing the particle equivalent spherical size change as a function of relative humidity due to absorbing or evaporating water. Particle phase Physical properties
new id Hygroscopic particle light scattering growth factor A scaling factor describing the particle scattering coefficient change as a function of relative humidity due to absorbing or evaporating water. Particle phase Physical properties
new id Hygroscopic particle light extinction growth factor A scaling factor describing the particle extinction coefficient change as a function of relative humidity due to absorbing or evaporating water. Particle phase Physical properties

Add definitions to existing variables:

notation name (old) name (new) description (new) matrix tags
316 Light absorption coefficient, PM1 Particle light absorption coefficient, PM1 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: PM1 Particle phase Optical properties
317 Light absorption coefficient, PM10 Particle light absorption coefficient, PM10 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: PM10 Particle phase Optical properties
318 Light absorption coefficient, total aerosol Particle light absorption coefficient, TSP A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: TSP Particle phase Optical properties
322 Light scattering coefficient, PM1 Particle light scattering coefficient, PM1 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: PM1 Particle phase Optical properties
323 Light scattering coefficient, PM10 Particle light scattering coefficient, PM10 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: PM10 Particle phase Optical properties
324 Light scattering coefficient, total aerosol Particle light scattering coefficient, TSP A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: TSP Particle phase Optical properties
364 Mass concentration (coarse) or Mass PM10 Particle mass concentration PM10 Mass of particles per unit volume of air, size range: PM10 Particle phase Physical properties
365 Mass concentration (fine) or Mass PM1 Particle mass concentration, PM1 Mass of particles per unit volume of air, size range: PM1 Particle phase Physical properties
366 Mass concentration (medium), PM2.5 Particle mass concentration, PM2.5 Mass of particles per unit volume of air, size range: PM2.5 Particle phase Physical properties
368 Mass concentration (total aerosol) or Mass TSP Particle mass concentration, TSP Mass of particles per unit volume of air, size range: TSP Particle phase Physical properties
369 Number concentration Particle number concentration Amount of particles per unit volume of air Particle phase Physical properties
370 Number size distribution, PM10 Particle number size distribution, PM10 Particle number concentration as a function of size, typically equivalent spherical radius or diameter. Size range: PM10 Particle phase Physical properties
371 Number size distribution, total aerosol Particle number size distribution, TSP Particle number concentration as a function of size, typically equivalent spherical radius or diameter. Size range: TSP Particle phase Physical properties

Reason

Necessary additions of missing variables and variable descriptions

edit: final proposal

fstuerzl commented 3 years ago

@markusfiebig, @gaochen-larc, @ejwelton, @charlesabrock please review this proposal, considering that the removal of size range attributes has to be postponed.

I moved all proposals for new variables from here https://github.com/wmo-im/wmds/issues/280 to the issue at hand.

Open questions:

gaochen-larc commented 3 years ago

Ångström exponent for aerosol optical depth: A measure of dependence of the aerosol optical depth on wavelength expressed in power law relationship.

Ångström exponent for aerosol absorption optical depth: A measure of dependence of the aerosol absorption optical depth on wavelength expressed in power law relationship.

charlesabrock commented 3 years ago

In "Hygroscopic particle size growth factor, X µm equivalent" is the "X" a value that can be provided, or are they fixed diameter sizes? There is an infinity of different sizes that could be selected from which to measure growth factor, for example with a tandem DMA setup. Specifying fixed diameter entries makes no sense to me. But there needs to be some mechanism for the data provider to specify which diameter is being considered. For example, the hygroscopic growth of a 0.05 µm particle might be very different from that of a 0.5 µm particle.

fstuerzl commented 3 years ago

In "Hygroscopic particle size growth factor, X µm equivalent" is the "X" a value that can be provided, or are they fixed diameter sizes? There is an infinity of different sizes that could be selected from which to measure growth factor, for example with a tandem DMA setup. Specifying fixed diameter entries makes no sense to me. But there needs to be some mechanism for the data provider to specify which diameter is being considered. For example, the hygroscopic growth of a 0.05 µm particle might be very different from that of a 0.5 µm particle.

@charlesabrock, in the current code table we already have the variables with X in {165, 110, 75, 50, 35} and also "Hygroscopic growth factor, total aerosol". So as long as we don't have another mechanism (supported by the WMDR model) to specify the particle size, we need to keep these variables, I think.

fstuerzl commented 3 years ago

Updated proposal:

Proposal

New variables:

notation name description matrix tags
new id Particle light extinction coefficient A measure of light attenuation due to scattering and absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance Particle phase Optical properties
new id Particle single scattering albedo Ratio of particle scattering coefficient to particle extinction coefficient or sum of particle absorption and scattering coefficients. Particle phase Optical properties
new id Ångström exponent for particle light extinction A measure of dependence of the particle light extinction coefficient on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for particle light scattering A measure of dependence of the particle light scattering coefficient on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for particle light absorption A measure of dependence of the particle light absorption coefficient on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for aerosol optical depth A measure of dependence of the aerosol optical depth on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for aerosol absorption optical depth A measure of dependence of the aerosol absorption optical depth on wavelength expressed in power law relationship. Particle phase Optical properties
new id Particle Surface Area Size Distribution Particle surface area concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties
new id Particle Volume Density Size Distribution Particle volume concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties
new id Particle Mass Size Distribution Particle mass concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties
new id Hygroscopic particle size growth factor A scaling factor describing the particle equivalent spherical size change as a function of relative humidity due to absorbing or evaporating water. Particle phase Physical properties
new id Hygroscopic particle light scattering growth factor A scaling factor describing the particle scattering coefficient change as a function of relative humidity due to absorbing or evaporating water. Particle phase Physical properties
new id Hygroscopic particle light extinction growth factor A scaling factor describing the particle extinction coefficient change as a function of relative humidity due to absorbing or evaporating water. Particle phase Physical properties

Add definitions to existing variables:

notation name (old) name (new) description (new) matrix tags
316 Light absorption coefficient, PM1 Particle light absorption coefficient, PM1 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Particle phase Optical properties
317 Light absorption coefficient, PM10 Particle light absorption coefficient, PM10 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Particle phase Optical properties
318 Light absorption coefficient, total aerosol Particle light absorption coefficient, TSP A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Particle phase Optical properties
322 Light scattering coefficient, PM1 Particle light scattering coefficient, PM1 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Particle phase Optical properties
323 Light scattering coefficient, PM10 Particle light scattering coefficient, PM10 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Particle phase Optical properties
324 Light scattering coefficient, total aerosol Particle light scattering coefficient, TSP A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Particle phase Optical properties
364 Mass concentration (coarse) or Mass PM10 Particle mass concentration PM10 Mass of particles per unit volume of air Particle phase Physical properties
365 Mass concentration (fine) or Mass PM1 Particle mass concentration, PM1 Mass of particles per unit volume of air Particle phase Physical properties
366 Mass concentration (medium), PM2.5 Particle mass concentration, PM2.5 Mass of particles per unit volume of air Particle phase Physical properties
368 Mass concentration (total aerosol) or Mass TSP Particle mass concentration, TSP Mass of particles per unit volume of air. Particle phase Physical properties
370 Number size distribution, PM10 Particle Number size distribution, PM10 Particle number concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties
371 Number size distribution, total aerosol Particle Number size distribution, TSP Particle number concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties

[edit: size range for mass concentration entries

fstuerzl commented 3 years ago

Branch updated: https://github.com/wmo-im/wmds/blob/issue289/tables_en/1-01-01.csv View differences: https://github.com/wmo-im/wmds/compare/issue289

ejwelton commented 3 years ago

Updated proposal is acceptable to me, however the application of "TSP" to some of the variables (extinction, etc) has not been done? I note that aerosol optical depth in issue 263 has TSP added to the name now. We should keep consistent names across these variables.

gaochen-larc commented 3 years ago

Should we have all aerosol variable have 4 size cuts, PM1, PM2.5, PM10, and TSP? I know there are monitoring sites measure scattering coefficient for PM2.5. Or we can add when the someone sees the data submission. Either way works for me.

charlesabrock commented 3 years ago

It would make sense for scattering, given that many sampling sites measuring scattering using cyclones or impactors for size cuts. And our aircraft measurements often use a PM1 impactor for extinction and absorption, so I would say yes to these 4 size descriptions for all bulk variables.

Chuck

On May 27, 2021, at 5:31 AM, gaochen-larc @.***> wrote:

Should we have all aerosol variable have 4 size cuts, PM1, PM2.5, PM10, and TSP? I know there are monitoring sites measure scattering coefficient for PM2.5. Or we can add when the someone sees the data submission. Either way works for me.

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/wmo-im/wmds/issues/289#issuecomment-849556813, or unsubscribe https://github.com/notifications/unsubscribe-auth/ATIXPDLZIZMCCJNZPZAUIDLTPYUQJANCNFSM45PK6PIA.


Charles Brock
NOAA Chemical Sciences Laboratory
325 Broadway R/CSD2
Boulder, CO 80305
303-497-3795 (voice)
303-497-5126 (fax)
***@***.***
markusfiebig commented 3 years ago

A few changes reflecting latest discussions:

Please correct to: notation name description matrix tags
new id Particle Volume Size Distribution Particle volume concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties

We agreed to remove "density".

fstuerzl commented 3 years ago

A few changes reflecting latest discussions:

Please correct to:

notation name description matrix tags new id Particle Volume Size Distribution Particle volume concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties We agreed to remove "density".

Term removed, see: https://github.com/wmo-im/wmds/commit/bc2a50033466d14500d9b82e2c8a22aa572e4a3d

fstuerzl commented 3 years ago

Since a more fundamentel reorganisation of the observed variable table was postponed (recommendation from WG ACV), the proposal is ready for validation.

Consolidated proposal:

Branch

https://github.com/wmo-im/wmds/blob/issue289/tables_en/1-01-01.csv

Summary and Purpose

Variables for optical and physical properties of particle phase are missing in the codes list. In other cases variables are not properly defined or need a more precise name.

Stakeholder(s)

WG ACV

Proposal

New variables:

notation name description matrix tags
new id Particle light extinction coefficient A measure of light attenuation due to scattering and absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance Particle phase Optical properties
new id Particle single scattering albedo Ratio of particle scattering coefficient to particle extinction coefficient or sum of particle absorption and scattering coefficients. Particle phase Optical properties
new id Ångström exponent for particle light extinction A measure of dependence of the particle light extinction coefficient on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for particle light scattering A measure of dependence of the particle light scattering coefficient on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for particle light absorption A measure of dependence of the particle light absorption coefficient on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for aerosol optical depth A measure of dependence of the aerosol optical depth on wavelength expressed in power law relationship. Particle phase Optical properties
new id Ångström exponent for aerosol absorption optical depth A measure of dependence of the aerosol absorption optical depth on wavelength expressed in power law relationship. Particle phase Optical properties
new id Particle Surface Area Size Distribution Particle surface area concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties
new id Particle Volume Size Distribution Particle volume concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties
new id Particle Mass Size Distribution Particle mass concentration as a function of size, typically equivalent spherical radius or diameter. Particle phase Physical properties
new id Hygroscopic particle size growth factor A scaling factor describing the particle equivalent spherical size change as a function of relative humidity due to absorbing or evaporating water. Particle phase Physical properties
new id Hygroscopic particle light scattering growth factor A scaling factor describing the particle scattering coefficient change as a function of relative humidity due to absorbing or evaporating water. Particle phase Physical properties
new id Hygroscopic particle light extinction growth factor A scaling factor describing the particle extinction coefficient change as a function of relative humidity due to absorbing or evaporating water. Particle phase Physical properties

Add definitions to existing variables:

notation name (old) name (new) description (new) matrix tags
316 Light absorption coefficient, PM1 Particle light absorption coefficient, PM1 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: PM1 Particle phase Optical properties
317 Light absorption coefficient, PM10 Particle light absorption coefficient, PM10 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: PM10 Particle phase Optical properties
318 Light absorption coefficient, total aerosol Particle light absorption coefficient, TSP A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: TSP Particle phase Optical properties
322 Light scattering coefficient, PM1 Particle light scattering coefficient, PM1 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: PM1 Particle phase Optical properties
323 Light scattering coefficient, PM10 Particle light scattering coefficient, PM10 A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: PM10 Particle phase Optical properties
324 Light scattering coefficient, total aerosol Particle light scattering coefficient, TSP A measure of light attenuation due to absorption by aerosol particles expressed as the Beer-Lambert Law exponent at unit path distance. Size range: TSP Particle phase Optical properties
364 Mass concentration (coarse) or Mass PM10 Particle mass concentration PM10 Mass of particles per unit volume of air, size range: PM10 Particle phase Physical properties
365 Mass concentration (fine) or Mass PM1 Particle mass concentration, PM1 Mass of particles per unit volume of air, size range: PM1 Particle phase Physical properties
366 Mass concentration (medium), PM2.5 Particle mass concentration, PM2.5 Mass of particles per unit volume of air, size range: PM2.5 Particle phase Physical properties
368 Mass concentration (total aerosol) or Mass TSP Particle mass concentration, TSP Mass of particles per unit volume of air, size range: TSP Particle phase Physical properties
369 Number concentration Particle number concentration Amount of particles per unit volume of air Particle phase Physical properties
370 Number size distribution, PM10 Particle number size distribution, PM10 Particle number concentration as a function of size, typically equivalent spherical radius or diameter. Size range: PM10 Particle phase Physical properties
371 Number size distribution, total aerosol Particle number size distribution, TSP Particle number concentration as a function of size, typically equivalent spherical radius or diameter. Size range: TSP Particle phase Physical properties

Reason

Necessary additions of missing variables and variable descriptions

fstuerzl commented 3 years ago

@gaochen-larc I'll add the size cut-off to the variable description

gaochen-larc commented 3 years ago

@gaochen-larc I'll add the size cut-off to the variable description

Thank you @fstuerzl !!!

fstuerzl commented 3 years ago

@gaochen-larc I'll add the size cut-off to the variable description

Thank you @fstuerzl !!!

-> Updated in the consolidated proposal above

joergklausen commented 3 years ago

Proposal considered 'validated', notations will be provided after registration in OSCAR/Surface.

charlesabrock commented 3 years ago

Great, I was about to make the same comment!

Chuck

On Jun 15, 2021, at 6:37 AM, gaochen-larc @.***> wrote:

@gaochen-larc https://github.com/gaochen-larc I'll add the size cut-off to the variable description

Thank you @fstuerzl https://github.com/fstuerzl !!!

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/wmo-im/wmds/issues/289#issuecomment-861461738, or unsubscribe https://github.com/notifications/unsubscribe-auth/ATIXPDNGEIBTJDZPWC2RMVTTS5CQJANCNFSM45PK6PIA.


Charles Brock
NOAA Chemical Sciences Laboratory
325 Broadway R/CSD2
Boulder, CO 80305
303-497-3795 (voice)
303-497-5126 (fax)
***@***.***