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

# data[].attributes.definition
Absorbance is defined as "the logarithm of the ratio of incident to transmitted radiant power through a sample. Absorbance 260nm describes the absorbance at a wavelength of 260 nm.

# data[].attributes.definition
Absorbance is defined as "the logarithm of the ratio of incident to transmitted radiant power through a sample. Absorbance 280nm describes the absorbance at a wavelength of 280 nm.

# data[].attributes.definition
A ratio shows how many times one number contains another. The absorbance ratio 260/230 is the ratio value between the absorbance value of 260 nm divided by the absorbance value of 230 nm. 
Ratios may be unit-less, as in the case they relate quantities in units of the same dimension, even if their units of measurement are initially different.

# data[].attributes.definition
A ratio shows how many times one number contains another. The absorbance ratio 260/280 is the ratio value between the absorbance value of 260 nm divided by the absorbance value of 280 nm. 
Ratios may be unit-less, as in the case they relate quantities in units of the same dimension, even if their units of measurement are initially different.

# 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 relative representation of a species in a particular ecosystem. If this generic term is used, the publisher should specify/qualify the species, class, etc. being measured in the method, qualifier, or other appropriate field.

# data[].attributes.definition
The relative representation of a species in a particular ecosystem. If this generic term is used, the publisher should specify/qualify the species, class, etc. being measured in the method, qualifier, or other appropriate field.

# data[].attributes.definition
A physical quality inhering in a bearer by virtue of the rate of change of the bearer's velocity in either speed or direction. X-component of acceleration.

# data[].attributes.definition
A physical quality inhering in a bearer by virtue of the rate of change of the bearer's velocity in either speed or direction. Y-component of acceleration.

# data[].attributes.definition
A physical quality inhering in a bearer by virtue of the rate of change of the bearer's velocity in either speed or direction. Z-component of acceleration.

# data[].attributes.definition
Adsorbable organically bonded halogens (AOX).

# 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
Alluvium is loose, unconsolidated (not cemented together into a solid rock) soil or sediment that has been eroded, reshaped by water in some form, and redeposited in a non-marine setting. Alluvium is typically made up of a variety of materials, including fine particles of silt and clay and larger particles of sand and gravel. When this loose alluvial material is deposited or cemented into a lithological unit, or lithified, it is called an alluvial deposit.

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

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

# data[].attributes.definition
Basal area is the area of a given section of land that is occupied by the cross-section of tree trunks and stems at the base. The term is used in forest management and forest ecology.

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

# data[].attributes.definition
Aspect identifies the downslope direction of the maximum rate of change in value from each raster DEM cell to its neighbors.

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

# 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 length of the arc of the horizon (in degrees) intercepted between a given point and a reference direction, usually north, and measured clockwise from the reference direction.

# data[].attributes.definition
The portion of streamflow (discharge) that is supplied by groundwater sources.

# data[].attributes.definition
Percent base saturation (BS) is the percentage of the Cation Exchange Capacity (CEC) occupied by the basic cations Ca2+, Mg2+ and K+.

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

# data[].attributes.definition
The battery temperature of a datalogger or sensing system

# data[].attributes.definition
In geology, bedrock is the lithified rock that lies under a loose softer material called regolith at the surface of the Earth or other terrestrial planets.

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

# data[].attributes.definition
Mass of living biological organisms in a given area or ecosystem at a given time. If this generic term is used, the publisher should specify/qualify the species, class, etc. being measured in the method, qualifier, or other appropriate field.

# data[].attributes.definition
The biomass is the mass of living biological organisms in a given area or ecosystem at a given time on or above the surface of the ground

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

# data[].attributes.definition
Microbial biomass (bacteria and fungi) is a measure of the mass of the living component of soil organic matter.

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

# data[].attributes.definition
Total mass of phytoplankton, per unit area or volume

# data[].attributes.term
Biomass, soil bacterial deoxyribonucleic acid (DNA)

# data[].attributes.definition
Total dry mass of soil bacterial deoxyribonucleic acid (DNA) per unit mass of soil

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

# data[].attributes.definition
Total dry mass of plant material per unit area or volume

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

# data[].attributes.definition
Blue-green algae (cyanobacteria) with phycocyanin pigments

# data[].attributes.definition
Classification of material encountered by a driller at various depths during the drilling of a well and recorded in the borehole log.

# 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 mass of many particles of the material divided by the total volume they occupy. The total volume includes particle volume, inter-particle void volume and internal pore volume.

# data[].attributes.definition
Bulk electrical conductivity of a medium measured using a sensor such as time domain reflectometry (TDR), as a raw sensor response in the measurement of a quantity like soil moisture.

# data[].attributes.definition
Crown closure is a term used in forestry. Crown closure and crown cover are two slightly different measures of the forest canopy and that determine the amount of light able to penetrate to the forest floor.

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

# data[].attributes.definition
Forest canopy density and height are used as variables in a number of environmental applications, such as biomass estimation, vegetation coverage, and biodiversity determination. Canopy density, or canopy cover, is the ratio of vegetation to ground as seen from the air. Canopy height measures how far above the ground the top of the canopy is. Lidar can be used to determine both of these variables.

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

# 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
In geometry, the circumference (from Latin circumferens, meaning "carrying around") of a circle is the (linear) distance around it. That is, the circumference would be the length of the circle if it were opened up and straightened out to a line segment. Since a circle is the edge (boundary) of a disk, circumference is a special case of perimeter. The perimeter is the length around any closed figure and is the term used for most figures excepting the circle and some circular-like figures such as ellipses. Informally, "circumference" may also refer to the edge itself rather than to the length of the edge.

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

# data[].attributes.definition
USDA particle size distribution category. Less then 0.002 mm diameter fine earth particles. 

# 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.note
This is a test case for submitting new measured quantities in cv version 1.3.0.

# data[].attributes.definition
Phycocyanin is a pigment-protein complex from the light-harvesting phycobiliprotein family, along with allophycocyanin and phycoerythrin.[1] It is an accessory pigment to chlorophyll. All phycobiliproteins are water-soluble, so they cannot exist within the membrane like carotenoids can. Instead, phycobiliproteins aggregate to form clusters that adhere to the membrane called phycobilisomes. Phycocyanin is a characteristic light blue color, absorbing orange and red light, particularly 620 nm (depending on which specific type it is), and emits fluorescence at about 650 nm (also depending on which type it is). Allophycocyanin absorbs and emits at longer wavelengths than phycocyanin C or phycocyanin R. Phycocyanins are found in cyanobacteria (also called blue-green algae).[2] Phycobiliproteins have fluorescent properties that are used in immunoassay kits. Phycocyanin is from the Greek phyco meaning "algae" and cyanin is from the English word "cyan", which conventionally means a shade of blue-green (close to "aqua") and is derived from the Greek "kyanos" which means a somewhat different color: "dark blue". The product phycocyanin, produced by Aphanizomenon flos-aquae and Spirulina, is for example used in the food and beverage industry as the natural coloring agent 'Lina Blue' or 'EXBERRY Shade Blue' and is found in sweets and ice cream. In addition, fluorescence detection of phycocyanin pigments in water samples is a useful method to monitor cyanobacteria biomass.[3]

# 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 identifying number for a water sampler container.

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

# data[].attributes.definition
The total number of events within the measurement period

# data[].attributes.definition
In navigation, the course of a watercraft or aircraft is the cardinal direction in which the craft is to be steered.

# data[].attributes.definition
Curvature of a DEM measures the shape or curvature of the slope. A part of a surface can be concave or convex; you can tell that by looking at the curvature value. The curvature is calculated by computing the second derivative of the surface.

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

# data[].attributes.definition
Ideally datetime format according to ISO 8601 (yyyy=year, mm=month, dd=day).

# data[].attributes.definition
Ideally datetime format according to ISO 8601 (yyyy=year, mm=month, dd=day, HH=hour, MM=minute, SS=second). Alternatively JD (Julian Date).