Register: Measurement unit

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URI: http://codes.wmo.int/wmdr/unit    

Measurement unit

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changed on 21 Nov 2019 09:06:03.065
submitted bykurt-hectic
accepted on 29 Apr 2020 14:36:13.110

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description Measurement unit
has member relation member
label Measurement unit
member nautical mile | degrees true | centibar per 12 hours | decibel per metre | per mille | milligram per litre | square metres per second | micromoles per mole | cubic metres per cubic metre | per megametre per steradian | kilometre per day | pH unit | newtons per square metre | microgram N per cubic metre | per square kilogram per second | kilometre per hour | radian | milligram per kilogram | metres per second per 1000 metres | Weber | milligram N per litre | electron volt | nanogram per kilogram | watt | kilogram per kilogram | joule per square metre | dimensionless | milligal | megahertz | millimetre to the sixth power per cubic metre | metre per second squared | henry | joules per kilogram | per cent | nanograms per cubic metre | month | square metre second per radian | knot | millimetre per second | becquerel seconds per cubic metre | milligrams per cubic metre at 25 degrees | parts per million by volume | square metre per second | becquerels per litre | year | per kilometre | watt per square metre per steradian per metre | centimetre per second | gram per kilogram per second | lux | minute (angle) | Eötvös | decibel per degree (angle) | second | cubic metres | microgram per kilogram | siemens per metre | hectopascals per hour | micromole per kilogram | parsec | Dobson Unit | degrees Celsius per metre | kilogram per metre | radian per second | degree (angle) per second | degree Celsius (°C) | micromole per mole | watt per metre per steradian | kilograms per square metre per second | millimetre of mercury | newton | watt per square metre per steradian per inverse metre | kelvin per metre | metres to the two thirds power per second | joule | kilocalory per square centimetre | coulomb | square metre per square second | millimetres to the sixth power per cubic metre | metre per second per metre | mole per mole | week | micrograms per cubic metre at 20 degrees | per meg | micromoles per litre | unknown | joule per kilogram | hertz | lumen | ohm | grams per kilogram | nanogram per cubic metre | kelvin metres per second | centimetre per hour | knots per 1000 metres | kilogram per cubic metre | grams per kilogram per second | kelvin | moles per mole | watt per square metre | millimoles per mole | ...
modified 2 Jan 2024 17:14:30.589
type Collection | Container | Register
version info 116
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Contents

Name Notation Description Types Status
minute (angle) ' Unit of plane or phase angle, accepted for use with SI: 1 ' =... Concept stable
second (angle) '' Unit of plane or phase angle, accepted for use with SI: 1 '' ... Concept stable
parts per thousand 0.001 Concept superseded
dimensionless 1 Dimensionless; SI base unit equivalent: 1 Concept stable
ampere A SI base unit of electric current Concept stable
astronomical unit AU Unit of length, accepted for use with SI: 1 AU = 149597870700... Concept stable
becquerel Bq SI derived unit of radioactivity; SI base unit equivalent: s-... Concept stable
becquerel per litre Bq.l-1 Unit of radioactivity concentration; SI base unit equivalent:... Concept stable
becquerel per square metre Bq.m-2 SI derived unit of radioactivity area concentration; SI base ... Concept stable
becquerel per cubic metre Bq.m-3 SI derived unit of radioactivity concentration; SI base unit ... Concept stable
becquerel second per cubic metre Bq.s.m-3 SI derived unit of time integrated radioactivity concentratio... Concept stable
becquerels per litre Bq_l-1 Concept superseded
becquerels per square metre Bq_m-2 Concept superseded
becquerels per cubic metre Bq_m-3 Concept superseded
becquerel seconds per cubic metre Bq_s_m-3 Concept superseded
coulomb C SI derived unit of electric charge; SI base unit equivalent: ... Concept stable
colony-forming unit per millilitre CFU.ml-1 Unit of number concentration of viable bacteria or fungal cel... Concept stable
degrees Celsius per 100 metres C_(100m)-1 Concept superseded
degrees Celsius per metre C_m-1 Concept superseded
degree Celsius Cel Concept superseded
Dobson Unit DU Unit of column abundance of molecules in the atmosphere. 1 DU... Concept stable
Eötvös E Unit of acceleration divided by distance,1 E = 1E-9 Gal/cm; S... Concept stable
farad F SI derived unit of electrical capacitance; SI base unit equiv... Concept stable
gigahertz GHz SI derived unit of frequency; SI base unit equivalent: 1E9 s-... Concept stable
gray Gy SI derived unit of absorbed dose (of ionizing radiation); SI ... Concept stable
henry H SI derived unit of electrical inductance; SI base unit equiva... Concept stable
Hazen unit HU Unit of color according to the Platinum/Cobalt or Apha-Hazen ... Concept stable
hertz Hz SI derived unit of frequency; SI base unit equivalent: s-1 Concept stable
joule J SI derived unit of energy, work, heat; SI base unit equivalen... Concept stable
joule per kilogram J.kg-1 SI derived unit of specific energy or specific potential enth... Concept stable
joule per square metre J.m-2 SI derived unit of radiant exposure; SI base unit equivalent:... Concept stable
joules per kilogram J_kg-1 Concept superseded
joules per square metre J_m-2 Concept superseded
kelvin K SI base unit of thermodynamic temperature Concept stable
kelvin per metre K.m-1 SI derived unit of spatial gradient of temperature Concept stable
kelvin metre per second K.m.s-1 SI derived unit of covariance of wind speed and temperature o... Concept stable
kelvin square metre per kilogram per second K.m2.kg-1.s-1 SI derived unit of potential vorticity Concept stable
kelvins per metre K_m-1 Concept superseded
kelvin square metres per kilogram per second K_m2_kg-1_s-1 Concept superseded
kelvin metres per second K_m_s-1 Concept superseded
megahertz MHz SI derived unit of frequency; SI base unit equivalent: 1E6 s-... Concept stable
most probable number index number in 1 millilitre MPN.ml-1 Unit of expected number concentration of bacteria in the orig... Concept stable
per megametre Mm-1 Unit of quantity with dimension of reciprocal length, e.g., o... Concept stable
per megametre per steradian Mm-1.sr-1 SI derived unit of the scattering coefficient at a given dire... Concept stable
newton N SI derived unit of force, weight Concept stable
newton per square metre N.m-2 SI derived unit of pressure or equivalent quantity Concept stable
nephelometric turbidity unit NTU Units of turbidity from a calibrated nephelometer; SI base un... Concept stable
newtons per square metre N_m-2 Concept superseded
N units N_units Unit of atmospheric refractivity, the refractivity, N, is rel... Concept stable
ohm Ohm SI derived unit of electrical resistance, impedance, reactanc... Concept stable
pascal Pa SI derived unit of pressure/stress; SI base unit equivalent: ... Concept stable
pascal per second Pa.s-1 SI derived unit of temporal derivative of pressure/stress; SI... Concept stable
pascals per second Pa_s-1 Concept superseded
siemens S SI derived unit of electrical conductance; SI base unit equiv... Concept stable
siemens per metre S.m-1 SI derived unit of spatial gradient of electric conductance Concept stable
siemens per metre S_m-1 Concept superseded
sievert Sv SI derived unit of equivalent dose (of ionizing radiation); S... Concept stable
tesla T SI derived unit of magnetic induction, magnetic flux density;... Concept stable
terahertz THz SI derived unit of frequency; SI base unit equivalent: 1E12 s... Concept stable
volt V SI derived unit of voltage, electrical potential difference, ... Concept stable
watt W SI derived unit of power, radiant flux; SI base unit equivale... Concept stable
watt per metre per steradian W.m-1.sr-1 SI derived unit of spectral intensity, a directional quantity... Concept stable
watt per square metre W.m-2 SI derived unit of heat flux density or irradiance; SI base u... Concept stable
watt per square metre per steradian W.m-2.sr-1 SI derived unit of radiance; SI base unit equivalent: kg.s-3 Concept stable
watt per square metre per steradian per hertz W.m-2.sr-1.Hz-1 SI derived unit of spectral radiance per unit frequency; SI b... Concept stable
watt per square metre per steradian per inverse centimetre W.m-2.sr-1.cm SI derived unit of spectral radiance per unit wavenumber, wav... Concept stable
watt per square metre per steradian per inverse metre W.m-2.sr-1.m SI derived unit of spectral radiance per inverse metre; SI ba... Concept stable
watt per square metre per steradian per metre W.m-3.sr-1 SI derived unit of spectral radiance per unit wavelength; SI ... Concept stable
watts per metre per steradian W_m-1_sr-1 Concept superseded
watts per square metre W_m-2 Concept superseded
watts per square metre per steradian W_m-2_sr-1 Concept superseded
watts per square metre per steradian centimetre W_m-2_sr-1_cm Concept superseded
watts per square metre per steradian metre W_m-2_sr-1_m Concept superseded
watts per cubic metre per steradian W_m-3_sr-1 Concept superseded
Weber Wb SI derived unit of magnetic flux; SI base unit equivalent: kg... Concept stable
year a Conventional unit of time duration, ranging from 365 days to ... Concept stable
centibar per 12 hours cb.(12h)-1 Conventional unit of time derivative of pressure, pressure te... Concept stable
centibar per second cb.s-1 Conventional unit of time derivative of pressure, pressure te... Concept stable
centibars per 12 hours cb_-1 Concept superseded
centibars per second cb_s-1 Concept superseded
candela cd SI base unit of luminous intensity Concept stable
centimetre cm SI prefixed unit of length; SI base unit equivalent: 0.01 m Concept stable
per cubic centimetre cm-3 SI derived unit of specific volume; SI base unit equivalent: ... Concept stable
centimetre per hour cm.h-1 SI derived unit of speed; SI base unit equivalent: 1/360000 m... Concept stable
centimetre per second cm.s-1 SI derived unit of speed; SI base unit equivalent: 0.01 m.s-1 Concept stable
square centimetre cm2 SI derived unit of area; SI base unit equivalent: 1E-4 m2 Concept stable
cubic centimetre per cubic metre cm3.m-3 SI derived unit of volumetric mixing ratio, equivalent to ppm... Concept stable
centimetres per hour cm_h-1 Concept superseded
centimetres per second cm_s-1 Concept superseded
day d Unit of time, accepted for use with SI: 1 d = 86400 s Concept stable
decibel dB Unit of sound intensity, accepted for use with SI Concept stable
decibel per degree (angle) dB.deg-1 Unit of angular gradient of sound intensity Concept stable
decibel per metre dB.m-1 Unit of spatial gradient of sound intensity Concept stable
decibels per degree dB_deg-1 Concept superseded
decibels per metre dB_m-1 Concept superseded
decipascal per second (microbar per second) dPa.s-1 SI derived unit of time derivative of pressure, pressure tend... Concept stable
decipascals per second (microbar per second) dPa_s-1 Concept superseded
dekapascal daPa SI derived unit of pressure/stress; SI base unit equivalent: ... Concept stable
degree (angle) deg Unit of plane or phase angle, accepted for use with SI: 1 deg... Concept stable
degree (angle) per second deg.s-1 Unit of angular speed, accepted for use with SI Concept stable
square degree (angle) deg2 Unit of square of phase or plane angle, accepted for use with... Concept stable
degree Celsius (°C) degC SI derived unit of temperature, as defined by ITS-90; SI base... Concept stable
degree Celsius per 100 metres degC.hm-1 SI derived unit of spatial gradient of temperature per 100 me... Concept stable
degree Celsius per metre degC.m-1 SI derived unit of spatial gradient of temperature per metre;... Concept stable
degrees per second deg_s-1 Concept superseded
degree (angle) degree_(angle) Concept superseded
degrees true degrees_true Concept superseded
decimetre dm SI prefixed unit of length; SI base unit equivalent: 0.1 m Concept stable
electron volt eV Unit of energy, accepted for use with SI; SI base unit equiva... Concept stable
femtomole per kilogram fmol.kg-1 SI derived unit of amount per unit mass; SI base unit equival... Concept stable
foot ft Imperial/US unit of length, equal to 1200/3937 metre or 0.304... Concept stable
acceleration due to gravity g Concept superseded
gram per cubic centimetre g.cm-3 SI derived unit of density, equivalent to kilograms per litre... Concept stable
gram per kilogram g.kg-1 SI derived unit of mass fraction, dimensionless; SI base unit... Concept stable
gram per kilogram per second g.kg-1.s-1 SI derived unit of time derivative of mass fraction; SI base ... Concept stable
standard acceleration due to gravity g0 Conventional unit of gravity acceleration; g0 = 9.80665 m.s-2 Concept stable
grams per kilogram g_kg-1 Concept superseded
grams per kilogram per second g_kg-1_s-1 Concept superseded
geopotential metre gpm The height of a given point in the atmosphere in units propor... Concept stable
hour h Unit of time, accepted for use with SI: 1 h = 3600 s Concept stable
hectopascal hPa SI derived unit of pressure/stress; SI base unit equivalent: ... Concept stable
hectopascal per 3 hours hPa.(3h)-1 SI derived unit of time derivative of pressure; SI base unit ... Concept stable
hectopascal per hour hPa.h-1 SI derived unit of time derivative of pressure; SI base unit ... Concept stable
hectopascal per second hPa.s-1 SI derived unit of time derivative of pressure; SI base unit ... Concept stable
hectopascals per 3 hours hPa_-1 Concept superseded
hectopascals per hour hPa_h-1 Concept superseded
hectopascals per second hPa_s-1 Concept superseded
hectare ha Unit of area, accepted for use with SI: 1 ha = 1E4 m2 Concept stable
inch in Imperial/US unit of length, equal to 25.4 millimetres Concept stable
inapplicable inapplicable There is no value (categorical data) Concept stable
kilohertz kHz SI derived unit of frequency; SI base unit equivalent: 1000 s... Concept stable
kilopascal kPa SI derived unit of pressure/stress, equal to 1000 Pa; SI base... Concept stable
kilocalory per square centimetre kcal.cm-2 Unit of radiant exposure, equal to 4.184E7 J.m-2 Concept stable
kilogram kg SI base unit of mass Concept stable
per square kilogram per second kg-2.s-1 SI derived unit of quantity with dimension of M-2.T-1 Concept stable
per square kilogram per second kg-2_s-1 Concept superseded
kilogram per kilogram kg.kg-1 SI derived unit of mass fraction; SI base unit equivalent: 1 Concept stable
kilogram per kilogram per second kg.kg-1.s-1 SI derived unit of time derivative of mass fraction; SI base ... Concept stable
kilogram per metre kg.m-1 SI derived unit of linear mass density or quantity with dimen... Concept stable
kilogram per square metre kg.m-2 SI derived unit of area density Concept stable
kilogram per square metre per second kg.m-2.s-1 SI derived unit of time derivative of mass area density Concept stable
kilogram per cubic metre kg.m-3 SI derived unit of density, mass density Concept stable
kilograms per kilogram kg_kg-1 Concept superseded
kilograms per kilogram per second kg_kg-1_s-1 Concept superseded
kilograms per metre kg_m-1 Concept superseded
kilograms per square metre kg_m-2 Concept superseded
kilograms per square metre per second kg_m-2_s-1 Concept superseded
kilograms per cubic metre kg_m-3 Concept superseded
kilometre km SI prefixed unit of length; SI base unit equivalent: 1000 m Concept stable
per kilometre km-1 SI derived unit of quantity with dimension of reciprocal leng... Concept stable
per kilometre per steradian km-1.sr-1 SI derived unit of the scattering coefficient at a given dire... Concept stable
kilometre per day km.d-1 SI derived unit of speed; SI base unit equivalent: 1000/86400... Concept stable
kilometre per hour km.h-1 SI derived unit of speed; SI base unit equivalent: 1000/3600 ... Concept stable
kilometres per day km_d-1 Concept superseded
kilometres per hour km_h-1 Concept superseded
knot kt Conventional unit of speed, equal to 1 nmi/h; SI base unit eq... Concept stable
knot per 1000 metres kt.km-1 Conventional unit of spatial gradient of speed; SI base unit ... Concept stable
knots per 1000 metres kt_km-1 Concept superseded
litre l SI derived unit of volume; SI base unit equivalent: 0.001 m3 Concept stable
lumen lm SI derived unit of luminous flux; SI base unit equivalent: 1 ... Concept stable
lux lx SI derived unit of illuminance; SI base unit equivalent: cd.m... Concept stable
metre m SI base unit of length Concept stable
metre to the two thirds power per second m(2.3-1).s-1 SI derived unit of the quantity with dimension of L^(2/3) T-1 Concept stable
metres to the two thirds power per second m(2_3)_s-1 Concept superseded
per metre m-1 SI derived unit of quantity with dimension of reciprocal leng... Concept stable
per metre per steradian m-1.sr-1 SI derived unit of the scattering coefficient at a given dire... Concept stable
per cubic metre m-3 SI derived unit of specific volume Concept stable
metre per year m.a-1 Conventional unit of velocity Concept stable
metre per second m.s-1 SI derived unit of speed Concept stable
metre per second per 1000 metres m.s-1.km-1 SI derived unit of spatial gradient of speed; SI base unit eq... Concept stable
metre per second per metre m.s-1.m-1 SI derived unit of spatial gradient of speed Concept stable
metre per second squared m.s-2 SI derived unit of acceleration Concept stable
square metre m2 SI derived unit of area Concept stable
square metre second m2.s SI derived unit of sea surface wave variance spectral density Concept stable
square metre per second m2.s-1 SI derived unit of kinematic viscosity, thermal diffusivity, ... Concept stable
square metre per square second m2.s-2 SI derived quantity with dimension of squared speed Concept stable
square metre second per radian m2.s.rad-1 SI derived unit of sea surface wave directional variance spec... Concept stable
square metres per hertz m2_Hz-1 Concept superseded
square metres per radian second m2_rad-1_s Concept superseded
square metres second m2_s Concept superseded
square metres per second m2_s-1 Concept superseded
square metres per second squared m2_s-2 Concept superseded
cubic metres m3 SI derived unit of volume Concept stable
cubic metre per cubic metre m3.m-3 SI derived unit of volume fraction; SI base unit equivalent: ... Concept stable
cubic metre per second m3.s-1 SI derived unit of volume flow rate or time derivative of vol... Concept stable
cubic metres per cubic metre m3_m-3 Concept superseded
cubic metres per second m3_s-1 Concept superseded
metre to the fourth power m4 SI derived unit of the second moment of area, area moment of ... Concept stable
millibecquerel per cubic metre mBq.m-3 SI derived unit of volumetric radioactivity concentration; SI... Concept stable
millibecquerels per cubic metre mBq_m-3 Concept superseded
milligal mGal CGS unit of acceleration, equal to one thousandth of a Gal (1... Concept stable
millisiemens per centimetre mS.cm-1 SI derived unit of spatial gradient of electrical conductance... Concept stable
millisievert mSv SI derived unit of equivalent dose (of ionizing radiation); S... Concept stable
millivolt mV SI derived unit of voltage, electrical potential difference, ... Concept stable
metres per second m_s-1 Concept superseded
metres per second per 1000 metres m_s-1_km-1 Concept superseded
metres per second per metre m_s-1_m-1 Concept superseded
metres per second squared m_s-2 Concept superseded
millibar mbar Conventional unit of pressure, equal to 1 hPa; SI base unit e... Concept stable
milligram per cubic centimetre mg.cm-3 SI derived unit of mass concentration; SI base unit equivalen... Concept stable
milligram per kilogram mg.kg-1 SI derived unit of mass fraction, equivalent to ppmm (parts p... Concept stable
milligram per litre mg.l-1 SI derived unit of density or mass concentration; SI base uni... Concept stable
milligram per cubic metre mg.m-3 SI derived unit of density or mass concentration; SI base uni... Concept stable
milligram N per litre mg_N_l-1 Concept superseded
milligram S per litre mg_S_l-1 Concept superseded
milligrams per cubic metre at 25 degrees mg_m-3_25C Concept superseded
minute (time) min Unit of time, accepted for use with SI: 1 min = 60 s Concept stable
missing missing The correct value is not readily available to the sender of t... Concept stable
millimetre mm SI prefixed unit of length; SI base unit equivalent: 0.001 m Concept stable
millimetre per hour mm.h-1 SI derived unit of speed; SI base unit equivalent: 1/3.6E6 m.... Concept stable
millimetre per second mm.s-1 SI derived unit of speed; SI base unit equivalent: 0.001 m.s-... Concept stable
cubic millimetre per cubic metre mm3.m-3 SI derived unit of volumetric mixing ratio, equivalent to ppb... Concept stable
millimetre to the sixth power per cubic metre mm6.m-3 SI derived unit of quantity with dimension of L3; SI base uni... Concept stable
millimetres to the sixth power per cubic metre mm6_m-3 Concept superseded
millimetre of mercury mmHg Conventional unit of pressure, equal to 133.322387415 Pa Concept stable
millimetres per hour mm_h-1 Concept superseded
millimetres per second mm_s-1 Concept superseded
millimole per mole mmol.mol-1 SI derived unit equivalent to expressing mole fraction in par... Concept stable
millimoles per mole mmol_mol-1 Concept superseded
mole mol SI base unit of amount of substance Concept stable
mole per mole mol.mol-1 SI derived unit of mole fraction; SI base unit equivalent: 1 Concept stable
moles per mole mol_mol-1 Concept superseded
month mon Conventional unit of time duration of between 28-31 days wher... Concept stable
nautical mile nautical_mile Concept superseded
nanobar nbar Conventional unit of pressure; SI base unit equivalent: 1E-4 ... Concept stable
nanogram per kilogram ng.kg-1 SI derived unit of mass fraction, equivalent to pptm (parts p... Concept stable
nanogram per cubic metre ng.m-3 SI derived unit of mass concentration; SI base unit equivalen... Concept stable
nanograms per cubic metre ng_m-3 Concept superseded
nanometre nm SI prefixed unit of length; SI base unit equivalent: 1E-9 m Concept stable
nautical mile nmi Conventional unit of length; SI base unit equivalent: 1852 m Concept stable
nanomole per kilogram nmol.kg-1 SI derived unit of amount per unit mass; SI base unit equival... Concept stable
nanomole per mole nmol.mol-1 SI derived unit of mole fraction; SI base unit equivalent: 1E... Concept stable
nanomoles per mole nmol_mol-1 Concept superseded
eights of sky covered by cloud okta Unit of cloud amount, expressed as number of eighths of the s... Concept stable
pH unit pH_unit Negative decimal logarithm of the hydrogen ion activity ('eff... Concept stable
parsec pc Astronomical unit of length, 1 pc = 64800/Π AU Concept stable
per cent percent Dimensionless number, expressed as a fraction of 100; SI base... Concept stable
per meg permeg Dimensionless number, expressed as a fraction of 1000000; SI ... Concept stable
per mille permil Dimensionless number, expressed as a fraction of 1000; SI bas... Concept stable
picomole per kilogram pmol.kg-1 SI derived unit of amount per unit mass; SI base unit equival... Concept stable
picomole per mole pmol.mol-1 SI derived unit equivalent of mole fraction; SI base unit equ... Concept stable
picomoles per mole pmol_mol-1 Concept superseded
parts per billion by volume ppbv Unit of volume fraction, equivalent to SI derived unit: 1E-9 Concept stable
parts per million by volume ppmv Unit of volume fraction, equivalent to SI derived unit: 1E-6 Concept stable
parts per trillion by volume pptv Unit of volume fraction, equivalent to SI derived unit: 1E-12 Concept stable
practical salinity unit psu Conventional unit, equivalent to per mille; SI based unit equ... Concept stable
radian rad SI derived unit of plane angle; SI base unit equivalent: 1 Concept stable
radian per metre rad.m-1 SI derived unit of spatial gradient of plane angle Concept stable
radian per second rad.s-1 SI derived unit of angular velocity; SI base unit equivalent:... Concept stable
radians per metre rad_m-1 Concept superseded
radian per second rad_s-1 Concept superseded
second s SI base unit of time Concept stable
per second (same as hertz) s-1 Concept superseded
per second squared s-2 SI derived unit of second order time derivative Concept stable
second per metre s.m-1 SI derived unit of quantity with dimension of T.L-1 Concept stable
seconds per metre s_m-1 Concept superseded
steradian sr SI derived unit of solid angle; SI base unit equivalent: 1 Concept stable
tonne t Unit of mass, accepted for use with SI; SI base unit equivale... Concept stable
(metric) ton per hectare t.ha-1 Unit of area density, equal to 0.1 kg.m-2 Concept stable
(metric) ton per hectare t_ha-1 Concept superseded
unified atomic mass unit u Conventional unit of mass; 1 u = 1 Da (Dalton) = 1.6605390666... Concept stable
microsiemens per centimetre uS.cm-1 SI derived unit of spatial gradient of electrical conductance... Concept stable
microgram per kilogram ug.kg-1 SI derived unit of mass fraction, equivalent to ppbm (parts p... Concept stable
microgram per litre ug.l-1 SI derived unit of mass concentration; SI base unit equivalen... Concept stable
microgram per cubic metre ug.m-3 SI derived unit of mass concentration; SI base unit equivalen... Concept stable
microgram C per cubic metre ug_C_m-3 Concept superseded
microgram CI per cubic metre ug_Cl_m-3 Concept superseded
microgram N per cubic metre ug_N_m-3 Concept superseded
microgram S per cubic metre ug_S_m-3 Concept superseded
micrograms per cubic metre at 20 degrees ug_m-3_20C Concept superseded
micrograms per cubic metre at 25 degrees ug_m-3_25C Concept superseded
micrometre um SI prefixed unit of length; SI base unit equivalent: 1E-6 m Concept stable
cubic micrometre per cubic centimetre um3.cm-3 SI derived unit of volume fraction, equivalent to pptv (parts... Concept stable
micromole per kilogram umol.kg-1 SI derived unit of amount per unit mass; SI base unit equival... Concept stable
micromole per litre umol.l-1 SI derived unit of amount concentration; SI base unit equival... Concept stable
micromole per mole umol.mol-1 SI derived unit of mole fraction; SI base unit equivalent: 1E... Concept stable
micromoles per kilogram umol_kg-1 Concept superseded
micromoles per litre umol_l-1 Concept superseded
micromoles per mole umol_mol-1 Concept superseded
unknown unknown The correct value is not known to, and not computable by, the... Concept stable
week week Conventional unit of time, equivalent to 604800 s Concept stable