What lies underneath science parameters

Luis Bermudez MMI 2007

Parameters Composition

Parameters are composed (implicitly or explicitly) of the following:

• Complex properties• Complex observables• Complex methods

Examples from CF and BODC are enclosed

CF - Air_temperature

Temperature of air

Property

Observable

BODC code GTKCMA01

Second maximum level of waves on the water column by waverider and manual record analysis

Second maximum level of

waves on the water column by

waverider and manual record analysis

ComplexObservable

ComplexProperty

ComplexMethod

BODC code ANH3FIPT

Concentration of ammonium {NH4} per unit volume of

the atmosphere [particulate phase] by

filtration with teflon filter and flow infection gas diffusion analysis

ComplexProperty

ComplexObservable

ComplexMethod

BODC code ANH3FIPT

Concentration of ammonium {NH4} per unit volume of the atmosphere [particulate phase]

by filtration with teflon filter and flow infection gas diffusion analysis

ComplexProperty

ComplexObservable

ComplexMethod

CF - Change_over_time_in _surface_snow_amount

Change_over_time_of_snow_amount_in_surface

ComplexProperty

Complex Observable

ComplexMethod No method

CF - Change_over_time_in _surface_snow_amount

Change_over_time_of_snow_amount_in_surface

ComplexProperty

ComplexMethod No method

Complex Observable

BODC - HEADCM01

Orientation (horizontal relative to true north)

of measurement platform {heading} by compass

ComplexProperty

ComplexMethod

Complex Observable

CF - mass_concentration_ of_sulfate_aerosol_in_air

mass_concentration_ of_sulfate_aerosol

in

Air

ComplexProperty

Complex Observable

BODC 488LRXUU

Upwelling radiance as energy (488nm wavelength)

in the water column by radiance sensor

ComplexProperty

Complex Observable

ComplexMethod

EDCS - ACCUM_PRECIP_24_HOUR

ACCUM_PRECIP_24_HOUR

ComplexProperty

Complex Observable(Implicit)

Atmosphere

Questions

• What constitutes a Complex Property ?• What constitutes a Complex Observable ?• What constitutes a Complex Method ?

• How far can we go with CF?

BNF for CF ?

< > variable (or non terminal)[ ] optional| or{ } 0 or morestring - is a terminal

property ::= <simpleProperty> | <complexProperty>simpleProperty ::= <observable> <dimension>complexProperty ::= <dimension><dimensionModifier><observablePhrase>observablePhrase ::= ( in <medium> | <earthRealm> ) | ( at <PhisicalObject> )observable ::= <medium> | <earthRealm> | <PhisicalObject>medium ::= air | water earthRealm ::= seaSurface | seaBottom | seaFloor | atmospherePhisicalObject ::= platform