New cloud object of interest and associated variables

ACTRIS-Data-Centre / actris-vocabulary

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New cloud object of interest and associated variables #11

Closed swr99ejo closed 2 months ago

swr99ejo commented 1 year ago

Some measurements of liquid water variables are not always able to distinguish between liquid cloud droplets and larger precipitation drops (rain or drizzle). These would be useful for in situ probes that measure bulk liquid water content and some microwave radiometer measurements (and for some satellite comparison products)

New object of interest: Liquid water Description: Bulk parameter that includes all hydrometeors in liquid phase, i.e. liquid droplets, drizzle droplets and raindrops, if present

New cloud variables: liquid water mass concentration:

OBSERVED PROPERTY: [ mass concentration]
actris_vocab/liquidwatermassconcentration liquid water total column mass content:
OBSERVED PROPERTY: [column mass content]
actris_vocab/liquidwatercolumnmasscontent

markusfiebig commented 11 months ago

Does this mean liquid water is skos:broader liquid droplets, drizzle droplets, and raindrops? Does this affect the variables measuring cloud water chemical composition?

swr99ejo commented 9 months ago

From some instrument perspectives, yes, cloud liquid water chemical composition is not strictly limited to liquid cloud droplets. Satellites and models also often combine all warm phases into one category (all warm liquid), combine all ice phases, and also combine both warm and ice into a total bulk water. Some models often combine graupel and hail categories, however, this is not necessary for us to do..

markusfiebig commented 7 months ago

liquid water would include liquid droplet, drizzle droplet, raindrop hydrometeor would include liquid droplet, drizzle droplet, raindrop, ice particle, graupel, hail proposal by @swr99ejo and @markusfiebig .

Will have consequences for cloud in situ variables. Need to discuss / reconfirm with CIS which liquid water variables they need as variables.

markusfiebig commented 4 months ago

Definition of liquid water not used by CIS variables. Therefore ok with CIS. CIS uses liquid droplet, and that definition is fine.

CIS points out that definition of hydrometeor should coincide with external definitions, e.g. AMS.

markusfiebig commented 2 months ago

Implemented in dev version, will be rolled out with next version.