# data[].attributes.definition
The amount of radiation absorbed by a material

# data[].attributes.definition
Absorbance of ultraviolet light at a specified wavelength, typically at 254 or 280 nm for water samples. Not normalized to DOC concentration like variables such as SUVA280.

# data[].attributes.note
Added to support Critical Zone Observatory (CZO) data use cases. 

# data[].attributes.definition
The density of air or atmospheric density is the mass per unit volume of Earth's atmosphere.

# data[].attributes.definition
An air quality index (AQI) is an approximation of how polluted the air currently is or how polluted it is forecast to become.

# data[].attributes.note
There is no unit for this parameter. In german it is LQI (Luftqualitätsindex).

# data[].attributes.definition
The temperature of the atmosphere expressed against the International Temperature Scale 1990 (ITS-90) standard.

# data[].attributes.provenance
Air temperature entry of the NERC Vocabulary Server (NVS).

# data[].attributes.definition
A velocity is a vector quantity. "Upward" indicates a vector component which is positive when directed upward (negative downward). Upward air velocity is the vertical component of the 3D air velocity vector.

# data[].attributes.note
I am aware that 'vertical velocity' is already in the vocabulary, but for consistency , we would prefer if these 3 wind components (northward wind, eastward wind and upward air velocity) from the sonic anemometer come all from sf-conventions

# data[].attributes.definition
Quotient between "global radiaton" and "global radiation (reflected)"

# data[].attributes.definition
The pressure exerted by the weight of the air in the Earth's atmosphere.

# data[].attributes.provenance
Atmospheric pressure entry of the NERC Vocabulary Server (NVS).

# data[].attributes.definition
The brightness temperature of a body is the temperature of a black body which radiates the same power per unit solid angle per unit area.

# data[].attributes.definition
The carrier-to-noise ratio is defined as the ratio of the received modulated carrier signal power C to the received noise power N

# data[].attributes.definition
Area fraction" is the fraction of a grid cell's horizontal area that has some characteristic of interest. It is evaluated as the area of interest divided by the grid cell area, or if the cell_methods restricts the evaluation to some portion of that grid cell (e.g. "where sea_ice"), then it is the area of interest divided by the area of the identified portion. It may be expressed as a fraction, a percentage, or any other dimensionless representation of a fraction. The cloud area fraction is for the whole atmosphere column, as seen from the surface or the top of the atmosphere. For the cloud area fraction between specified levels in the atmosphere, standard names including "cloud_area_fraction_in_atmosphere_layer" are used. Standard names also exist for high, medium and low cloud types. Cloud area fraction is also called "cloud amount" and "cloud cover.

# data[].attributes.definition
Cloud_base refers to the base of the lowest cloud. Altitude is the (geometric) height above the geoid, which is the reference geopotential surface. The geoid is similar to mean sea level.

# data[].attributes.term
Cloud Cover oder Cloud Cover Factor oder Cloudiness oder Cloudage

# data[].attributes.definition
A primary alcohol that is ethane in which one of the hydrogens is substituted by a hydroxy group.

# data[].attributes.term
Concentration volatile organic compound (VOC)

# data[].attributes.definition
Volatile organic compounds (VOCs) are
carbon-based chemicals with high vapor pressure at room temperature, allowing them to easily evaporate into the air from solids or liquids.

# data[].attributes.note
Not found in typical vocabularies. TVOC ist the total amount - but better use in label. Units are ppb, ppm and µg/m³.

# data[].attributes.definition
The pressure altitude corrected for temperature deviations from the standard atmosphere.
Density altitude bears the same relation to pressure altitude as true altitude does to indicated altitude.

# data[].attributes.definition
Differential Phase Shift (ΦDP or PHI) is a measure of the difference in 2-way attenuation for the horizontal and vertical pulses in a pulse volume. As vertical and horizontal radar pulses pass through a particular target, the two pulses attenuate, or slow down, causing each pulse's phase to change. ΦDP shows the difference in phase shift between the horizontal pulse and the vertical pulse. This provides information about the shape and concentration of radar targets.

# data[].attributes.definition
The ratio of radar reflectivity measured by means of two signals that differ in one attribute, for example, polarization or wavelength.

# data[].attributes.definition
Full width at half maximum of the spectrum. Representative of particules speed dispersion in the range gate.

# data[].attributes.note
no vocabulary available, how to proceed? Manual not publicly available

# data[].attributes.definition
The Doppler spread or Doppler spectrum width is usually defined as the standard deviation of the Doppler velocity about its mean value, regarding the velocity as a continuously distributed random variable with a probability density function equal to the normalized Doppler spectrum. Direction of polarization here is horizontal.

# data[].attributes.definition
The Doppler spread or Doppler spectrum width is usually defined as the standard deviation of the Doppler velocity about its mean value, regarding the velocity as a continuously distributed random variable with a probability density function equal to the normalized Doppler spectrum. Direction of polarization here is vertical.

# data[].attributes.definition
The radial component of the velocity vector of a scattering object as observed by a remote sensor, such as a Doppler radar or Doppler lidar.

# data[].attributes.definition
The frequency distribution of drop sizes (diameters, volumes) that is characteristic of a given cloud or of a given fall of rain.

# data[].attributes.definition
"Equivalent reflectivity factor" is the radar reflectivity factor that is calculated from the measured radar return power assuming the target is composed of liquid water droplets whose diameter is less than one tenth of the radar wavelength, i.e., treating the droplets as Rayleigh scatterers. The actual radar reflectivity factor would depend on the size distribution and composition of the particles within the target volume and these are often unknown.

# data[].attributes.note
equivalent_reflectivity_factor, unit is dBz - and please note that 'reflectivity' itself would not be appropriate here. In addition the description there relates to the unit. This has to be changed there

# data[].attributes.definition
Total short-wave direct and diffuse downward radation

# data[].attributes.definition
Total short-wave direct and diffuse upward radiation

# data[].attributes.definition
The combination effect of heat and humidity on the temperature felt by people.

# data[].attributes.term
Ice nucleating particle number concentration

# data[].attributes.definition
Number per unit volume of particles able to serve as condensation nuclei for ice phase cloud particles

# data[].attributes.definition
Incident light from the hemisphere per wavelength.

# data[].attributes.definition
Lightning is a natural phenomenon consisting of electrostatic discharges occurring through the atmosphere between two electrically charged regions.

# data[].attributes.note
use "Lightning, average distance" and "Lightning, strike count". as more specific terms

# data[].attributes.definition
The average distance of lightning strikes to the weather station.

# data[].attributes.definition
The count of lightning strikes around a weather station.

# data[].attributes.definition
A measure of the weight of the liquid water droplets in the atmosphere above a unit surface area on the earth, given in units of kg m-2, for example.

# data[].attributes.definition
"Mass concentration" means mass per unit volume and is used in the construction "mass_concentration_of_X_in_Y", where X is a material constituent of Y.

# data[].attributes.note
see e.g. mass_concentration_of_absorption_equivalent_black_carbon_of_pm10_dry_aerosol_particles_in_air in cf standard names. The term 'Mass concentration' already exists but the definition, sampling media and the compartment is to specific and has to be expanded to Air and atmosphere at least

# data[].attributes.definition
"Number concentration" means the number of particles or other specified objects per unit volume. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself.

# data[].attributes.term
Number concentration of aerosol particles in air

# data[].attributes.definition
"Number concentration" means the number of particles or other specified objects per unit volume. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself.

# data[].attributes.definition
Quotient betbeen PAR radiation In and PAR radiation Out (Reflected).

# data[].attributes.definition
Particle size is a notion introduced for comparing dimensions of solid particles (flecks), liquid particles (droplets), or gaseous particles (bubbles). The notion of particle size applies to particles in colloids, in ecology, in granular material (whether airborne or not), and to particles that form a granular material (see also grain size).

# data[].attributes.definition
Coarse particles with a diameter smaller than 0.5 μm.

# data[].attributes.note
In Analogie zu PM10 und PM2.5 gibt es auch diese Größenfraktion der PM. Units sind: ng/l, µg/m³ und 1/cm³

# data[].attributes.definition
Coarse particles with a diameter smaller than 1.0 μm (PM1.0).

# data[].attributes.note
In Analogie zu PM10, PM2.5 und PM0.5 gibt es auch diese Größenfraktion der PM. Units sind: ng/l, µg/m³ und 1/cm³

# data[].attributes.definition
Coarse particles with a diameter between 2.5 and 10 μm (PM10).

# data[].attributes.definition
Fine particles with a diameter of 2.5 μm or less (PM2.5).

# data[].attributes.definition
Coarse particles with a diameter smaller than 4.0 μm (PM4).

# data[].attributes.note
In Analogie zu PM10, PM2.5, PM1.0 und PM0.5 gibt es auch diese Größenfraktion der PM. Units sind: ng/l, µg/m³ und 1/cm³

# data[].attributes.definition
Binary value which distinguishes between no precipitation (0) and precipitation (1).

# data[].attributes.definition
Precipitation height, the liquid portion of the precipitation. Default min/max values valid for minute-values according to WMO quality control Guidelines.

# data[].attributes.definition
Precipitation height, the snow portion of the precipitation.

# data[].attributes.definition
Precipitation height, the snow-equivalent portion of the precipitation. This it the amount of water in mm which you get by melting snow with known heigt and density.

# data[].attributes.definition
Precipitation height, total sum of rain, snow, hail. (Please note if the device is heated. Values are quasi real-time with heating. Without heating, values are not real time.)

# data[].attributes.definition
Precipitation intensity, the hail portion of the precipitation.

# data[].attributes.definition
Precipitation intensity, the liquid portion of the precipitation. Default min/max values valid for minute-values according to WMO quality control Guidelines.

# data[].attributes.definition
Precipitation intensity, total sum of rain, snow, hail. Please note if the device is heated. Values are quasi real-time with heating. Without heating, values are not real time.

# data[].attributes.definition
Mean downward velocity of particles within each specific particle size class.

# data[].attributes.note
no vocabulary found , 
unit should be m/s, aggregation is also categorical (per size class)

# data[].attributes.definition
Coded value for the type of precipitation. Please note the type of sensor to enable the decoding.

# data[].attributes.definition
Correlation coefficient (also referred to as ρhv or rho) provides a measure of the consistency of the shapes and sizes of targets within the radar beam. A higher value shows a higher consistency in the size and shape of radar targets, while a lower value indicates greater variability in shapes and sizes.
Definition from US National Weather Service

naming according to WMO-CF extensions (https://community.wmo.int/en/activity-areas/wis/wmo-cf-extensions)

# data[].attributes.definition
a measure of the efficiency of a radar target in intercepting and returning radio energy

# data[].attributes.definition
Specific Differential Phase (KDP) is a derived product that shows the gradient, or change, in Differential Phase Shift (ΦDP). Positive KDP values indicate greater phase shift in the horizontal than the vertical.
Increasing KDP is an indication of an increase in the size and concentration of rain drops, and thus, an increase in rain rate. This means that KDP is useful for pinpointing areas where the heaviest rainfall is occurring.
naming accoring to WMO CF-extension Radial

# data[].attributes.term
Radial velocity of scatterers, away from instrument

# data[].attributes.definition
A velocity is a vector quantity. "Radial velocity away from instrument" means the component of the velocity along the line of sight of the instrument where positive implies movement away from the instrument (i.e. outward). The "instrument" (examples are radar and lidar) is the device used to make the observation. The "scatterers" are what causes the transmitted signal to be returned to the instrument (examples are aerosols, hydrometeors and refractive index irregularities), of whatever kind the instrument detects. A standard name referring to radial velocity "toward_instrument" should be used for a data variable having the opposite sign convention.

# data[].attributes.term
Radial velocity of scatterers, towards instrument

# data[].attributes.definition
A velocity is a vector quantity. "Radial velocity toward instrument" means the component of the velocity along the line of sight of the instrument where positive implies movement toward the instrument (i.e. inward). The "instrument" (examples are radar and lidar) is the device used to make the observation. The "scatterers" are what causes the transmitted signal to be returned to the instrument (examples are aerosols, hydrometeors and refractive index irregularities), of whatever kind the instrument detects. A standard name referring to radial velocity "away_from_instrument" should be used for a data variable having the opposite sign convention.

# data[].attributes.definition
Reflected light/radiation from ground area per wavelength.

# data[].attributes.definition
Long wave (far infrared) downward facing radiation

# data[].attributes.definition
Long wave (far infrared) upward facing radiation

# data[].attributes.definition
Photosynthetic photon flux density downward

# data[].attributes.definition
Photosynthetic photon flux density upward

# data[].attributes.definition
Diffuse photosynthetic photon flux density

# data[].attributes.definition
Total amount of outgoing radiation from all frequencies

# data[].attributes.definition
dBZ stands for decibel relative to Z. It is a logarithmic dimensionless technical unit used in radar, mostly in weather radar, to compare the equivalent reflectivity factor (Z) of a radar signal reflected off a remote object (in mm6 per m3) to the return of a droplet of rain with a diameter of 1 mm (1 mm6 per m3). It is proportional to the number of drops per unit volume and the sixth power of drops' diameter and is thus used to estimate the rain or snow intensity.

# data[].attributes.note
Added to support Critical Zone Observatory (CZO) data use cases.

# data[].attributes.definition
The ratio of the amount of water vapour in the air compared to the maximum amount of water vapour that can theoretically be held at the air's temperature.

# data[].attributes.definition
A value between 0 ... 1 that measures the signal's Doppler coherency, that is the correlation between the signal and its Doppler lag.

    0 indicates white noise
    1 is the perfect Doppler point target

# data[].attributes.definition
Sonic temperature is similar to 'virtual Temperature' but not exactly the same and derived from speed of sound of sonic anemometers/thermometers.

# data[].attributes.definition
In hydrology, stemflow is the flow of intercepted water down the trunk or stem of a plant.

# data[].attributes.definition
The THSW Index uses temperature, humidity, solar radiation, and wind speed to calculate an apparent temperature.

# data[].attributes.definition
The THW Index uses temperature, humidity, and wind speed to calculate an apparent temperature.

# data[].attributes.definition
The ultraviolet index, or UV index, is an international standard measurement of the strength of the sunburn-producing ultraviolet (UV) radiation at a particular place and time.

# data[].attributes.definition
Please Specify the kind of Vapor Pressure (e.g. satuartion vapor pressure,  current vapor pressure, vapor pressure deflict) in sensor description.

# data[].attributes.definition
The difference between the actual water vapor pressure and the saturation of water vapor pressure at a particular temperature.

# data[].attributes.definition
A velocity is a vector quantity. Vertical indicates a vector component which is positive when directed upward, negative when directed downward.

# data[].attributes.definition
The visibility is the distance at which something can be seen.

# data[].attributes.definition
'atmosphere_mass_content_of_water_vapor', 
alias: atmosphere_water_vapor_content

Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. Atmosphere water vapor content is sometimes referred to as "precipitable water", although this term does not imply the water could all be precipitated.

# data[].attributes.note
for convenience I suggest to name the term 'water vapor content, atmosphere' and add the cfconventions' term

# data[].attributes.definition
The ratio of the mass of a variable atmospheric constituent to the mass of dry air.

# data[].attributes.note
common unit is g/kg even though this would be dimensionless, entry in cf-conventions list: 'humidity_mixing_ratio' (Humidity mixing ratio of a parcel of moist air is the ratio of the mass of water vapor to the mass of dry air) is a good description, but the expressing humidity mixing ratio' is hardly in use

# data[].attributes.definition
Isobaric wet-bulb temperature: the temperature an air parcel would have if cooled adiabatically to saturation at constant pressure by evaporation of water into it, all latent heat being supplied by the parcel.

Or from wikipedia: The wet-bulb temperature (WBT) is the temperature read by a thermometer covered in cloth which has been soaked in water at ambient temperature (a wet-bulb thermometer) and over which air is passed. At 100% relative humidity, the wet-bulb temperature is equal to the air temperature (dry-bulb temperature); at lower humidity the wet-bulb temperature is lower than dry-bulb temperature because of evaporative cooling

# data[].attributes.definition
The effect of wind on the temperature felt on human skin.

# data[].attributes.definition
"Eastward" indicates a vector component which is positive when directed eastward (negative westward). Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component.

# data[].attributes.definition
"Northward" indicates a vector component which is positive when directed northward (negative southward). Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component.

# data[].attributes.definition
The direction of the air (absolute) in the atmosphere (from direction). Wind direction 0…360°, where 0° is north. Please note a different reference direction in the sensor description. Default min/max values according to WMO quality control Guidelines.

# data[].attributes.definition
Standard deviation of wind direction in degree.

# data[].attributes.definition
The length of flow of air past a point over a time interval. Windspeed times the interval of time.

# data[].attributes.definition
The speed of the air (absolute) in the atmosphere.

# data[].attributes.provenance
Wind speed entry of the NERC Vocabulary Server (NVS).

# data[].attributes.definition
The speed of the air (absolute) in the atmosphere. Lateral component of wind speed.

# data[].attributes.definition
Drag or trangential force per unit area exerted on a surface by the adjacent layer of moving air