nephelometric turbidity unit
type: Concept
description: Units of turbidity from a calibrated nephelometer; SI base unit equivalent: 10-3 kg.m-3
notation: NTU

decibel per degree (angle)
type: Concept
description: Unit of angular gradient of sound intensity
notation: dB.deg-1

millisiemens per centimetre
type: Concept
description: SI derived unit of spatial gradient of electrical conductance; SI base equivalent: 0.1 S.m-1
notation: mS.cm-1

degrees Celsius per metre
type: Concept
notation: C_m-1

decimetre
type: Concept
description: SI prefixed unit of length; SI base unit equivalent: 0.1 m
notation: dm

kilohertz
type: Concept
description: SI derived unit of frequency; SI base unit equivalent: 1000 s-1
notation: kHz

watt per metre per steradian
type: Concept
description: SI derived unit of spectral intensity, a directional quantity; SI base unit equivalent: kg.m.s-3
notation: W.m-1.sr-1

year
type: Concept
description: Conventional unit of time duration, ranging from 365 days to 366 days
notation: a

steradian
type: Concept
description: SI derived unit of solid angle; SI base unit equivalent: 1
notation: sr

dekapascal
type: Concept
description: SI derived unit of pressure/stress; SI base unit equivalent: 10 kg.m-1.s-2
notation: daPa

radian per metre
type: Concept
description: SI derived unit of spatial gradient of plane angle
notation: rad.m-1

degree (angle)
type: Concept
description: Unit of plane or phase angle, accepted for use with SI: 1 deg = (pi/180) rad
notation: deg

Dobson Unit
type: Concept
description: Unit of column abundance of molecules in the atmosphere. 1 DU is defined to be 0.01 mm thickness at STP (standard temperature and pressure, 0.00 degC and 1013.25 hPa) and is equivalent of 2.6867 x 1E20 molecules per square metre.
notation: DU

electron volt
type: Concept
description: Unit of energy, accepted for use with SI; SI base unit equivalent: 1.602176634E19 kg m2 s-2
notation: eV

joules per square metre
type: Concept
notation: J_m-2

micromoles per kilogram
type: Concept
notation: umol_kg-1

tesla
type: Concept
description: SI derived unit of magnetic induction, magnetic flux density; SI base unit equivalent: kg.s-2.A-1
notation: T

metre per second
type: Concept
description: SI derived unit of speed
notation: m.s-1

nanoTesla squared per Hertz
type: Concept
description: SI derived unit for magnetic power spectrum commonly used to describe Schumann Resonances. SI base unit equivalent: 1E-9 A.m-1.s
notation: nT2.Hz-1

per kilometre per steradian
type: Concept
description: SI derived unit of the scattering coefficient at a given direction; SI base unit equivalent: 0.001 m-1
notation: km-1.sr-1

nanometre
type: Concept
description: SI prefixed unit of length; SI base unit equivalent: 1E-9 m
notation: nm

unknown
type: Concept
description: The correct value is not known to, and not computable by, the sender of this data. However, a correct value probably exists.
notation: unknown

picomole per mole
type: Concept
description: SI derived unit equivalent of mole fraction; SI base unit equivalent: 1E-12
notation: pmol.mol-1

becquerel
type: Concept
description: SI derived unit of radioactivity; SI base unit equivalent: s-1
notation: Bq

per square kilogram per second
type: Concept
notation: kg-2_s-1

siemens per metre
type: Concept
notation: S_m-1

kilograms per square metre
type: Concept
notation: kg_m-2

millimetres per hour
type: Concept
notation: mm_h-1

second (angle)
type: Concept
description: Unit of plane or phase angle, accepted for use with SI: 1 '' = (pi/648000) rad
notation: ''

minute (time)
type: Concept
description: Unit of time, accepted for use with SI: 1 min = 60 s
notation: min

millibar
type: Concept
description: Conventional unit of pressure, equal to 1 hPa; SI base unit equivalent: 100 kg.m-1.s-2
notation: mbar

nanogram per cubic metre
type: Concept
description: SI derived unit of mass concentration; SI base unit equivalent: 1E-12 kg.m-3
notation: ng.m-3

kilogram per cubic metre
type: Concept
description: SI derived unit of density, mass density
notation: kg.m-3

femtomole per kilogram
type: Concept
description: SI derived unit of amount per unit mass; SI base unit equivalent: 1E-15 mol.kg-1
notation: fmol.kg-1

missing
type: Concept
description: The correct value is not readily available to the sender of this data. Furthermore, a correct value may not exist
notation: missing

per megametre per steradian
type: Concept
description: SI derived unit of the scattering coefficient at a given direction; SI base unit equivalent: 1E-6 m-1
notation: Mm-1.sr-1

microgram N per cubic metre
type: Concept
notation: ug_N_m-3

most probable number index number in 1 millilitre
type: Concept
description: Unit of expected number concentration of bacteria in the original sample based upon the statistical probability of the coincidence of microorganisms in each sample replicate
notation: MPN.ml-1

becquerel per litre
type: Concept
description: Unit of radioactivity concentration; SI base unit equivalent: 0.001 s-1.m-3
notation: Bq.l-1

radian per second
type: Concept
description: SI derived unit of angular velocity; SI base unit equivalent: s-1
notation: rad.s-1

pascals per second
type: Concept
notation: Pa_s-1

joule per square metre
type: Concept
description: SI derived unit of radiant exposure; SI base unit equivalent: m2.kg.s-2
notation: J.m-2

day
type: Concept
description: Unit of time, accepted for use with SI: 1 d = 86400 s
notation: d

watts per square metre
type: Concept
notation: W_m-2

cubic micrometre per cubic centimetre
type: Concept
description: SI derived unit of volume fraction, equivalent to pptv (parts per trillion by volume); SI base unit equivalent: 1E-12
notation: um3.cm-3

gram per kilogram
type: Concept
description: SI derived unit of mass fraction, dimensionless; SI base unit equivalent: 0.001
notation: g.kg-1

gray
type: Concept
description: SI derived unit of absorbed dose (of ionizing radiation); SI base unit equivalent: m2.s-2
notation: Gy

kilograms per kilogram
type: Concept
notation: kg_kg-1

micrograms per cubic metre at 20 degrees
type: Concept
notation: ug_m-3_20C

cubic metres
type: Concept
description: SI derived unit of volume
notation: m3

hectopascal per second
type: Concept
description: SI derived unit of time derivative of pressure; SI base unit equivalent: 100 kg.m-1.s-3
notation: hPa.s-1

degrees Celsius per 100 metres
type: Concept
notation: C_(100m)-1

square metres per second squared
type: Concept
notation: m2_s-2

standard acceleration due to gravity
type: Concept
description: Conventional unit of gravity acceleration; g0 = 9.80665 m.s-2
notation: g0

newtons per square metre
type: Concept
notation: N_m-2

mole
type: Concept
description: SI base unit of amount of substance
notation: mol

(metric) ton per hectare
type: Concept
description: Unit of area density, equal to 0.1 kg.m-2
notation: t.ha-1

centimetre
type: Concept
description: SI prefixed unit of length; SI base unit equivalent: 0.01 m
notation: cm

millimetre per hour
type: Concept
description: SI derived unit of speed; SI base unit equivalent: 1/3.6E6 m.s-1
notation: mm.h-1

pH unit
type: Concept
description: Negative decimal logarithm of the hydrogen ion activity ('effective' concentration) specified in moles per litre; SI base unit equivalent: 0.001 m-3
notation: pH_unit

litre
type: Concept
description: SI derived unit of volume; SI base unit equivalent: 0.001 m3
notation: l

watt
type: Concept
description: SI derived unit of power, radiant flux; SI base unit equivalent: kg.m2.s-3
notation: W

micrograms per cubic metre at 25 degrees
type: Concept
notation: ug_m-3_25C

per cubic metre
type: Concept
description: SI derived unit of specific volume
notation: m-3

decipascal per second (microbar per second)
type: Concept
description: SI derived unit of time derivative of pressure, pressure tendency; SI base unit equivalent: 0.1 kg.m-1.s-3
notation: dPa.s-1

parts per trillion by volume
type: Concept
description: Unit of volume fraction, equivalent to SI derived unit: 1E-12
notation: pptv

metre per second per metre
type: Concept
description: SI derived unit of spatial gradient of speed
notation: m.s-1.m-1

cubic metre per cubic metre
type: Concept
description: SI derived unit of volume fraction; SI base unit equivalent: 1
notation: m3.m-3

degree Celsius
type: Concept
notation: Cel

micromoles per litre
type: Concept
notation: umol_l-1

degree Celsius (°C)
type: Concept
description: SI derived unit of temperature, as defined by ITS-90; SI base unit equivalent: K, with t/degC = T/K + 273.15
notation: degC

metres to the two thirds power per second
type: Concept
notation: m(2_3)_s-1

gigahertz
type: Concept
description: SI derived unit of frequency; SI base unit equivalent: 1E9 s-1
notation: GHz

tonne
type: Concept
description: Unit of mass, accepted for use with SI; SI base unit equivalent: 1000 kg
notation: t

joule
type: Concept
description: SI derived unit of energy, work, heat; SI base unit equivalent: kg.m2.s-2
notation: J

watt per square metre
type: Concept
description: SI derived unit of heat flux density or irradiance; SI base unit equivalent: kg.s-3
notation: W.m-2

geopotential metre
type: Concept
description: The height of a given point in the atmosphere in units proportional to the potential energy of unit mass (geopotential) at this height relative to sea level. (AMS Glossary of Meteorology)
notation: gpm

mole per mole
type: Concept
description: SI derived unit of mole fraction; SI base unit equivalent: 1
notation: mol.mol-1

milligal
type: Concept
description: CGS unit of acceleration, equal to one thousandth of a Gal (1 Gal = 0.01 m.s-2)
notation: mGal

Hazen unit
type: Concept
description: Unit of color according to the Platinum/Cobalt or Apha-Hazen scale
notation: HU

kelvin square metre per kilogram per second
type: Concept
description: SI derived unit of potential vorticity
notation: K.m2.kg-1.s-1

millimetre
type: Concept
description: SI prefixed unit of length; SI base unit equivalent: 0.001 m
notation: mm

seconds per metre
type: Concept
notation: s_m-1

milligram S per litre
type: Concept
notation: mg_S_l-1

square centimetre
type: Concept
description: SI derived unit of area; SI base unit equivalent: 1E-4 m2
notation: cm2

becquerels per cubic metre
type: Concept
notation: Bq_m-3

foot
type: Concept
description: Imperial/US unit of length, equal to 1200/3937 metre or 0.3048 metre (approximately)
notation: ft

square metre per square second
type: Concept
description: SI derived quantity with dimension of squared speed
notation: m2.s-2

newton per square metre
type: Concept
description: SI derived unit of pressure or equivalent quantity
notation: N.m-2

pascal
type: Concept
description: SI derived unit of pressure/stress; SI base unit equivalent: kg.m-1.s-2
notation: Pa

ohm
type: Concept
description: SI derived unit of electrical resistance, impedance, reactance
notation: Ohm

hectopascals per hour
type: Concept
notation: hPa_h-1

acceleration due to gravity
type: Concept
notation: g

micromoles per mole
type: Concept
notation: umol_mol-1

milligrams per cubic metre at 25 degrees
type: Concept
notation: mg_m-3_25C

centibar per 12 hours
type: Concept
description: Conventional unit of time derivative of pressure, pressure tendency; SI base unit: 10/432 kg.m-1.s-3
notation: cb.(12h)-1

per kilometre
type: Concept
description: SI derived unit of quantity with dimension of reciprocal length, e.g., optical attenuation coefficients; SI base unit equivalent: 0.001 m-1
notation: km-1

square metre second
type: Concept
description: SI derived unit of sea surface wave variance spectral density
notation: m2.s

knot
type: Concept
description: Conventional unit of speed, equal to 1 nmi/h; SI base unit equivalent: (1852/3600)m.s-1
notation: kt

Weber
type: Concept
description: SI derived unit of magnetic flux; SI base unit equivalent: kg.m2.s-2.A-1
notation: Wb

microgram CI per cubic metre
type: Concept
notation: ug_Cl_m-3

decibel per metre
type: Concept
description: Unit of spatial gradient of sound intensity
notation: dB.m-1

millimetres per second
type: Concept
notation: mm_s-1

millibecquerels per cubic metre
type: Concept
notation: mBq_m-3

Eötvös
type: Concept
description: Unit of acceleration divided by distance,1 E = 1E-9 Gal/cm; SI base unit equivalent: 1E-9 s-2
notation: E

square metres per hertz
type: Concept
notation: m2_Hz-1

joules per kilogram
type: Concept
notation: J_kg-1

decibels per degree
type: Concept
notation: dB_deg-1

hertz
type: Concept
description: SI derived unit of frequency; SI base unit equivalent: s-1
notation: Hz

microsiemens per centimetre
type: Concept
description: SI derived unit of spatial gradient of electrical conductance; SI base unit equivalent: 1E-4 m-3.kg-1.s3.A2
notation: uS.cm-1

kilogram per metre
type: Concept
description: SI derived unit of linear mass density or quantity with dimension of M.L-1
notation: kg.m-1

degree (angle) per second
type: Concept
description: Unit of angular speed, accepted for use with SI
notation: deg.s-1

kilogram
type: Concept
description: SI base unit of mass
notation: kg

radians per metre
type: Concept
notation: rad_m-1

megahertz
type: Concept
description: SI derived unit of frequency; SI base unit equivalent: 1E6 s-1
notation: MHz

watt per square metre per steradian per hertz
type: Concept
description: SI derived unit of spectral radiance per unit frequency; SI base unit equivalent: kg.s-2
notation: W.m-2.sr-1.Hz-1

hectopascal per 3 hours
type: Concept
description: SI derived unit of time derivative of pressure; SI base unit equivalent: 1/108 kg.m-1.s-3
notation: hPa.(3h)-1

nanomole per mole
type: Concept
description: SI derived unit of mole fraction; SI base unit equivalent: 1E-9
notation: nmol.mol-1

Volt squared per metre squared per Hertz
type: Concept
description: 'SI derived unit for electric field spectral density commonly used to describe Schumann Resonances. SI base unit equivalent: kg2.m2.s-5.A-2'
notation: V2.m-2.Hz-1

millimoles per mole
type: Concept
notation: mmol_mol-1

millisievert
type: Concept
description: SI derived unit of equivalent dose (of ionizing radiation); SI base unit equivalent: 0.001 m2.s-2
notation: mSv

Measurement unit
type: Collection
type: Container
type: Register
description: Measurement unit
modified: 2026-01-06T16:52:32.178Z
version info: 119
member: nautical mile
member: degrees true
member: centibar per 12 hours
member: decibel per metre
member: per mille
member: milligram per litre
member: square metres per second
member: micromoles per mole
member: cubic metres per cubic metre
member: per megametre per steradian
member: kilometre per day
member: pH unit
member: newtons per square metre
member: microgram N per cubic metre
member: per square kilogram per second
member: kilometre per hour
member: radian
member: milligram per kilogram
member: metres per second per 1000 metres
member: Weber
member: milligram N per litre
member: electron volt
member: nanogram per kilogram
member: watt
member: kilogram per kilogram
member: joule per square metre
member: dimensionless
member: milligal
member: megahertz
member: millimetre to the sixth power per cubic metre
member: nanoTesla squared per Hertz
member: metre per second squared
member: henry
member: per cent
member: nanograms per cubic metre
member: month
member: joules per kilogram
member: square metre second per radian
member: knot
member: millimetre per second
member: becquerel seconds per cubic metre
member: milligrams per cubic metre at 25 degrees
member: parts per million by volume
member: square metre per second
member: becquerels per litre
member: year
member: per kilometre
member: watt per square metre per steradian per metre
member: centimetre per second
member: lux
member: gram per kilogram per second
member: minute (angle)
member: Eötvös
member: decibel per degree (angle)
member: second
member: microgram per kilogram
member: cubic metres
member: siemens per metre
member: micromole per kilogram
member: parsec
member: hectopascals per hour
member: Dobson Unit
member: degrees Celsius per metre
member: kilogram per metre
member: radian per second
member: degree (angle) per second
member: degree Celsius (°C)
member: micromole per mole
member: millimetre of mercury
member: kilograms per square metre per second
member: watt per metre per steradian
member: newton
member: watt per square metre per steradian per inverse metre

metres per second
type: Concept
notation: m_s-1

metre to the two thirds power per second
type: Concept
description: SI derived unit of the quantity with dimension of L^(2/3) T-1
notation: m(2.3-1).s-1

inch
type: Concept
description: Imperial/US unit of length, equal to 25.4 millimetres
notation: in

kilograms per kilogram per second
type: Concept
notation: kg_kg-1_s-1

nanogram per kilogram
type: Concept
description: SI derived unit of mass fraction, equivalent to pptm (parts per trillion by mass) or ppt (parts per trillion); SI base unit equivalent: 1E-12
notation: ng.kg-1

degree Celsius per 100 metres
type: Concept
description: SI derived unit of spatial gradient of temperature per 100 metres; SI base unit equivalent: 0.01 K.m-1
notation: degC.hm-1

millimetre per second
type: Concept
description: SI derived unit of speed; SI base unit equivalent: 0.001 m.s-1
notation: mm.s-1

picomoles per mole
type: Concept
notation: pmol_mol-1

watts per metre per steradian
type: Concept
notation: W_m-1_sr-1

milligram N per litre
type: Concept
notation: mg_N_l-1

millibecquerel per cubic metre
type: Concept
description: SI derived unit of volumetric radioactivity concentration; SI base unit equivalent: 0.001 s-1.m-3
notation: mBq.m-3

metre per second squared
type: Concept
description: SI derived unit of acceleration
notation: m.s-2

knot per 1000 metres
type: Concept
description: Conventional unit of spatial gradient of speed; SI base unit equivalent: 1852/3600000 s-1
notation: kt.km-1

per metre
type: Concept
description: SI derived unit of quantity with dimension of reciprocal length, e.g., wave number, optical power, curvature, spatial frequency
notation: m-1

nautical mile
type: Concept
description: Conventional unit of length; SI base unit equivalent: 1852 m
notation: nmi

metres per second per metre
type: Concept
notation: m_s-1_m-1

lumen
type: Concept
description: SI derived unit of luminous flux; SI base unit equivalent: 1 cd = 4π lm for a uniform source emitting in all directions.
notation: lm

square metre second per radian
type: Concept
description: SI derived unit of sea surface wave directional variance spectral density
notation: m2.s.rad-1

eights of sky covered by cloud
type: Concept
description: Unit of cloud amount, expressed as number of eighths of the sky dome that is covered by clouds; SI base unit equivalent: 0.125
notation: okta

nanograms per cubic metre
type: Concept
notation: ng_m-3

watts per square metre per steradian
type: Concept
notation: W_m-2_sr-1

kilograms per cubic metre
type: Concept
notation: kg_m-3

millimole per mole
type: Concept
description: SI derived unit equivalent to expressing mole fraction in parts per thousand; SI base unit equivalent: 0.001
notation: mmol.mol-1

henry
type: Concept
description: SI derived unit of electrical inductance; SI base unit equivalent: kg.m2.s-2.A-2
notation: H

watt per square metre per steradian
type: Concept
description: SI derived unit of radiance; SI base unit equivalent: kg.s-3
notation: W.m-2.sr-1

radian per second
type: Concept
notation: rad_s-1

becquerels per litre
type: Concept
notation: Bq_l-1

kilogram per kilogram per second
type: Concept
description: SI derived unit of time derivative of mass fraction; SI base unit equivalent: s-1
notation: kg.kg-1.s-1

kilometres per day
type: Concept
notation: km_d-1

becquerel seconds per cubic metre
type: Concept
notation: Bq_s_m-3

millivolt
type: Concept
description: SI derived unit of voltage, electrical potential difference, electromotive force; SI base unit equivalent: 0.001 m2.kg.s-3.A-1
notation: mV

kelvin metre per second
type: Concept
description: SI derived unit of covariance of wind speed and temperature or the product of wind speed and temperature
notation: K.m.s-1

terahertz
type: Concept
description: SI derived unit of frequency; SI base unit equivalent: 1E12 s-1
notation: THz

watt per square metre per steradian per metre
type: Concept
description: SI derived unit of spectral radiance per unit wavelength; SI base unit equivalent: kg.m-1.s-3
notation: W.m-3.sr-1

hectopascals per second
type: Concept
notation: hPa_s-1

centimetres per hour
type: Concept
notation: cm_h-1

metre per second per 1000 metres
type: Concept
description: SI derived unit of spatial gradient of speed; SI base unit equivalent: 0.001 s-1
notation: m.s-1.km-1

becquerel per square metre
type: Concept
description: SI derived unit of radioactivity area concentration; SI base unit equivalent: s-1.m-2
notation: Bq.m-2

per meg
type: Concept
description: Dimensionless number, expressed as a fraction of 1000000; SI base unit equivalent: 0.000001; also referred as parts per million (ppm)
notation: permeg

metre to the fourth power
type: Concept
description: SI derived unit of the second moment of area, area moment of inertia
notation: m4

decipascals per second (microbar per second)
type: Concept
notation: dPa_s-1

per second (same as hertz)
type: Concept
notation: s-1

parts per million by volume
type: Concept
description: Unit of volume fraction, equivalent to SI derived unit: 1E-6
notation: ppmv

grams per kilogram
type: Concept
notation: g_kg-1

metre
type: Concept
description: SI base unit of length
notation: m

kilometres per hour
type: Concept
notation: km_h-1

coulomb
type: Concept
description: SI derived unit of electric charge; SI base unit equivalent: s.A
notation: C

cubic metres per cubic metre
type: Concept
notation: m3_m-3

per cent
type: Concept
description: Dimensionless number, expressed as a fraction of 100; SI base unit equivalent: 0.01
notation: percent

microgram per kilogram
type: Concept
description: SI derived unit of mass fraction, equivalent to ppbm (parts per billion per mass) or ppb (parts per billion); SI base unit equivalent: 1E-9
notation: ug.kg-1

cubic metre per second
type: Concept
description: SI derived unit of volume flow rate or time derivative of volume
notation: m3.s-1

kilometre per day
type: Concept
description: SI derived unit of speed; SI base unit equivalent: 1000/86400 m.s-1
notation: km.d-1

watts per square metre per steradian centimetre
type: Concept
notation: W_m-2_sr-1_cm

centibar per second
type: Concept
description: Conventional unit of time derivative of pressure, pressure tendency; SI base unit: 1000 kg.m-1.s-3
notation: cb.s-1

(metric) ton per hectare
type: Concept
notation: t_ha-1

watts per square metre per steradian metre
type: Concept
notation: W_m-2_sr-1_m

astronomical unit
type: Concept
description: Unit of length, accepted for use with SI: 1 AU = 149597870700 m, roughly the distance from Earth to the Sun
notation: AU

moles per mole
type: Concept
notation: mol_mol-1

kilocalory per square centimetre
type: Concept
description: Unit of radiant exposure, equal to 4.184E7 J.m-2
notation: kcal.cm-2

decibel
type: Concept
description: Unit of sound intensity, accepted for use with SI
notation: dB

centimetre per hour
type: Concept
description: SI derived unit of speed; SI base unit equivalent: 1/360000 m.s-1
notation: cm.h-1

unified atomic mass unit
type: Concept
description: Conventional unit of mass; 1 u = 1 Da (Dalton) = 1.66053906660(50)E-27 kg
notation: u

kelvin
type: Concept
description: SI base unit of thermodynamic temperature
notation: K

milligram per cubic metre
type: Concept
description: SI derived unit of density or mass concentration; SI base unit equivalent: 1E-6 kg/m3
notation: mg.m-3

micromole per kilogram
type: Concept
description: SI derived unit of amount per unit mass; SI base unit equivalent: 1E-6 mol.kg-1
notation: umol.kg-1

nautical mile
type: Concept
notation: nautical_mile

millimetres to the sixth power per cubic metre
type: Concept
notation: mm6_m-3

lux
type: Concept
description: SI derived unit of illuminance; SI base unit equivalent: cd.m-2
notation: lx

kilometre
type: Concept
description: SI prefixed unit of length; SI base unit equivalent: 1000 m
notation: km

picomole per kilogram
type: Concept
description: SI derived unit of amount per unit mass; SI base unit equivalent: 1E-12 mol.kg-1
notation: pmol.kg-1

hectare
type: Concept
description: Unit of area, accepted for use with SI: 1 ha = 1E4 m2
notation: ha

hour
type: Concept
description: Unit of time, accepted for use with SI: 1 h = 3600 s
notation: h

siemens
type: Concept
description: SI derived unit of electrical conductance; SI base unit equivalent: kg-1.m-2.s3.A2
notation: S

decibels per metre
type: Concept
notation: dB_m-1

kilometre per hour
type: Concept
description: SI derived unit of speed; SI base unit equivalent: 1000/3600 m.s-1
notation: km.h-1

milligram per kilogram
type: Concept
description: SI derived unit of mass fraction, equivalent to ppmm (parts per million by mass) or ppm (parts per million); SI base unit equivalent: 1E-6
notation: mg.kg-1

metre per year
type: Concept
description: Conventional unit of velocity
notation: m.a-1

picoTesla squared per Hertz
type: Concept
description: SI derived unit for magnetic power spectrum commonly used to describe Schumann Resonances. SI base unit equivalent: 1E-12 A.m-1.s
notation: pT2.Hz-1

per mille
type: Concept
description: Dimensionless number, expressed as a fraction of 1000; SI base unit equivalent: 0.001
notation: permil

microgram per cubic metre
type: Concept
description: SI derived unit of mass concentration; SI base unit equivalent: 1E-9 kg.m-3
notation: ug.m-3

parts per billion by volume
type: Concept
description: Unit of volume fraction, equivalent to SI derived unit: 1E-9
notation: ppbv

degree Celsius per metre
type: Concept
description: SI derived unit of spatial gradient of temperature per metre; SI base unit equivalent: K.m-1
notation: degC.m-1

parts per thousand
type: Concept
notation: 0.001

sievert
type: Concept
description: SI derived unit of equivalent dose (of ionizing radiation); SI base unit equivalent: m2.s-2
notation: Sv

kilograms per metre
type: Concept
notation: kg_m-1

degrees per second
type: Concept
notation: deg_s-1

week
type: Concept
description: Conventional unit of time, equivalent to 604800 s
notation: week

micrometre
type: Concept
description: SI prefixed unit of length; SI base unit equivalent: 1E-6 m
notation: um

farad
type: Concept
description: SI derived unit of electrical capacitance; SI base unit equivalent: kg-1.m-2.s4.A2
notation: F

dimensionless
type: Concept
description: Dimensionless; SI base unit equivalent: 1
notation: 1

per square kilogram per second
type: Concept
description: SI derived unit of quantity with dimension of M-2.T-1
notation: kg-2.s-1

siemens per metre
type: Concept
description: SI derived unit of spatial gradient of electric conductance
notation: S.m-1

kilogram per square metre
type: Concept
description: SI derived unit of area density
notation: kg.m-2

kilogram per square metre per second
type: Concept
description: SI derived unit of time derivative of mass area density
notation: kg.m-2.s-1

millimetre to the sixth power per cubic metre
type: Concept
description: SI derived unit of quantity with dimension of L3; SI base unit equivalent: 1E-18 m3
notation: mm6.m-3

N units
type: Concept
description: Unit of atmospheric refractivity, the refractivity, N, is related to the refractive index, n, by the formula N=1E6(n-1). N is therefore dimensionless but values computed by the formula are by convention described as being in 'N units'
notation: N_units

nanomoles per mole
type: Concept
notation: nmol_mol-1

cubic millimetre per cubic metre
type: Concept
description: SI derived unit of volumetric mixing ratio, equivalent to ppbv (parts per billion by volume); SI base unit equivalent: 1E-9
notation: mm3.m-3

kilogram per kilogram
type: Concept
description: SI derived unit of mass fraction; SI base unit equivalent: 1
notation: kg.kg-1

centimetres per second
type: Concept
notation: cm_s-1

nanobar
type: Concept
description: Conventional unit of pressure; SI base unit equivalent: 1E-4 kg.m-1.s-2
notation: nbar

square degree (angle)
type: Concept
description: Unit of square of phase or plane angle, accepted for use with SI
notation: deg2

candela
type: Concept
description: SI base unit of luminous intensity
notation: cd

newton
type: Concept
description: SI derived unit of force, weight
notation: N

kelvin metres per second
type: Concept
notation: K_m_s-1

degree (angle)
type: Concept
notation: degree_(angle)

square metres per radian second
type: Concept
notation: m2_rad-1_s

becquerel second per cubic metre
type: Concept
description: SI derived unit of time integrated radioactivity concentration; SI base unit equivalent: m-3
notation: Bq.s.m-3

colony-forming unit per millilitre
type: Concept
description: Unit of number concentration of viable bacteria or fungal cells in a sample as a result of a plate count test
notation: CFU.ml-1

watt per square metre per steradian per inverse metre
type: Concept
description: SI derived unit of spectral radiance per inverse metre; SI base unit equivalent: kg.m.s-3
notation: W.m-2.sr-1.m

square metre
type: Concept
description: SI derived unit of area
notation: m2

metres per second squared
type: Concept
notation: m_s-2

pascal per second
type: Concept
description: SI derived unit of temporal derivative of pressure/stress; SI base unit equivalent: kg.m-1.s-3
notation: Pa.s-1

square metres per second
type: Concept
notation: m2_s-1

nanomole per kilogram
type: Concept
description: SI derived unit of amount per unit mass; SI base unit equivalent: 1E-9 mol.kg-1
notation: nmol.kg-1

per megametre
type: Concept
description: Unit of quantity with dimension of reciprocal length, e.g., optical attenuation coefficients; SI base unit equivalent: 1E-6 m-1
notation: Mm-1

kelvins per metre
type: Concept
notation: K_m-1

volt
type: Concept
description: SI derived unit of voltage, electrical potential difference, electromotive force; SI base unit equivalent: kg.m2.s-3.A-1
notation: V

ampere
type: Concept
description: SI base unit of electric current
notation: A

gram per cubic centimetre
type: Concept
description: SI derived unit of density, equivalent to kilograms per litre; SI base unit equivalent: 1000 kg.m-3
notation: g.cm-3

centibars per 12 hours
type: Concept
notation: cb_-1

per cubic centimetre
type: Concept
description: SI derived unit of specific volume; SI base unit equivalent: 1E-6 m-3
notation: cm-3

inapplicable
type: Concept
description: There is no value (categorical data)
notation: inapplicable

milligram per litre
type: Concept
description: SI derived unit of density or mass concentration; SI base unit equivalent: 0.001 kg.m-3
notation: mg.l-1

degrees true
type: Concept
notation: degrees_true

centimetre per second
type: Concept
description: SI derived unit of speed; SI base unit equivalent: 0.01 m.s-1
notation: cm.s-1

knots per 1000 metres
type: Concept
notation: kt_km-1

second
type: Concept
description: SI base unit of time
notation: s

square metres second
type: Concept
notation: m2_s

per metre per steradian
type: Concept
description: SI derived unit of the scattering coefficient at a given direction
notation: m-1.sr-1

hectopascal
type: Concept
description: SI derived unit of pressure/stress; SI base unit equivalent: 100 kg.m-1.s-2
notation: hPa

parsec
type: Concept
description: Astronomical unit of length, 1 pc = 64800/Π AU
notation: pc

microgram C per cubic metre
type: Concept
notation: ug_C_m-3

micromole per litre
type: Concept
description: SI derived unit of amount concentration; SI base unit equivalent: 0.001 mol.m-3
notation: umol.l-1

milligram per cubic centimetre
type: Concept
description: SI derived unit of mass concentration; SI base unit equivalent: 1 kg.m-3
notation: mg.cm-3

becquerels per square metre
type: Concept
notation: Bq_m-2

grams per kilogram per second
type: Concept
notation: g_kg-1_s-1

square metre per second
type: Concept
description: SI derived unit of kinematic viscosity, thermal diffusivity, diffusion coefficient
notation: m2.s-1

microgram per litre
type: Concept
description: SI derived unit of mass concentration; SI base unit equivalent: 1E-6 kg.m-3
notation: ug.l-1

practical salinity unit
type: Concept
description: Conventional unit, equivalent to per mille; SI based unit equivalent: 0.001
notation: psu

second per metre
type: Concept
description: SI derived unit of quantity with dimension of T.L-1
notation: s.m-1

cubic centimetre per cubic metre
type: Concept
description: SI derived unit of volumetric mixing ratio, equivalent to ppmv (parts per million by volume); SI base unit equivalent: 1E-6
notation: cm3.m-3

kelvin per metre
type: Concept
description: SI derived unit of spatial gradient of temperature
notation: K.m-1

minute (angle)
type: Concept
description: Unit of plane or phase angle, accepted for use with SI: 1 ' = (pi/10800) rad
notation: '

becquerel per cubic metre
type: Concept
description: SI derived unit of radioactivity concentration; SI base unit equivalent: s-1.m-3
notation: Bq.m-3

micromole per mole
type: Concept
description: SI derived unit of mole fraction; SI base unit equivalent: 1E-6
notation: umol.mol-1

kilopascal
type: Concept
description: SI derived unit of pressure/stress, equal to 1000 Pa; SI base unit equivalent: 1000 kg.m-1.s-2
notation: kPa

joule per kilogram
type: Concept
description: SI derived unit of specific energy or specific potential enthalpy; SI base unit equivalent: m2.kg.s-2.kg-1
notation: J.kg-1

kelvin square metres per kilogram per second
type: Concept
notation: K_m2_kg-1_s-1

watt per square metre per steradian per inverse centimetre
type: Concept
description: SI derived unit of spectral radiance per unit wavenumber, wavenumber expressed in 100 m-1; equivalent to W.m-2.sr-1.(cm-1)-1; SI base unit equivalent: 0.01 kg.m.s-3
notation: W.m-2.sr-1.cm

hectopascal per hour
type: Concept
description: SI derived unit of time derivative of pressure; SI base unit equivalent: 1/36 kg.m-1.s-3
notation: hPa.h-1

radian
type: Concept
description: SI derived unit of plane angle; SI base unit equivalent: 1
notation: rad

month
type: Concept
description: Conventional unit of time duration of between 28-31 days whereby 12 months amount to one year
notation: mon

cubic metres per second
type: Concept
notation: m3_s-1

centibars per second
type: Concept
notation: cb_s-1

watts per cubic metre per steradian
type: Concept
notation: W_m-3_sr-1

per second squared
type: Concept
description: SI derived unit of second order time derivative
notation: s-2

hectopascals per 3 hours
type: Concept
notation: hPa_-1

kilograms per square metre per second
type: Concept
notation: kg_m-2_s-1

metres per second per 1000 metres
type: Concept
notation: m_s-1_km-1

microgram S per cubic metre
type: Concept
notation: ug_S_m-3

gram per kilogram per second
type: Concept
description: SI derived unit of time derivative of mass fraction; SI base unit equivalent: 0.001 s-1
notation: g.kg-1.s-1

millimetre of mercury
type: Concept
description: Conventional unit of pressure, equal to 133.322387415 Pa
notation: mmHg