Conventional unit of length; SI base unit equivalent: 1852 m
nautical mile
nmi
Conventional unit of time derivative of pressure, pressure tendency; SI base unit: 10/432 kg.m-1.s-3
centibar per 12 hours
cb.(12h)-1
Unit of spatial gradient of sound intensity
decibel per metre
dB.m-1
Dimensionless number, expressed as a fraction of 1000; SI base unit equivalent: 0.001
per mille
permil
SI derived unit of density or mass concentration; SI base unit equivalent: 0.001 kg.m-3
milligram per litre
mg.l-1
SI derived unit of the scattering coefficient at a given direction; SI base unit equivalent: 1E-6 m-1
per megametre per steradian
Mm-1.sr-1
SI derived unit of speed; SI base unit equivalent: 1000/86400 m.s-1
kilometre per day
km.d-1
Negative decimal logarithm of the hydrogen ion activity ('effective' concentration) specified in moles per litre; SI base unit equivalent: 0.001 m-3
pH unit
pH_unit
SI derived unit of speed; SI base unit equivalent: 1000/3600 m.s-1
kilometre per hour
km.h-1
SI derived unit of plane angle; SI base unit equivalent: 1
radian
rad
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
milligram per kilogram
mg.kg-1
SI derived unit of magnetic flux; SI base unit equivalent: kg.m2.s-2.A-1
Weber
Wb
Unit of energy, accepted for use with SI; SI base unit equivalent: 1.602176634E19 kg m2 s-2
electron volt
eV
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
nanogram per kilogram
ng.kg-1
SI derived unit of power, radiant flux; SI base unit equivalent: kg.m2.s-3
watt
W
SI derived unit of mass fraction; SI base unit equivalent: 1
kilogram per kilogram
kg.kg-1
SI derived unit of radiant exposure; SI base unit equivalent: m2.kg.s-2
joule per square metre
J.m-2
Dimensionless; SI base unit equivalent: 1
dimensionless
1
CGS unit of acceleration, equal to one thousandth of a Gal (1 Gal = 0.01 m.s-2)
milligal
mGal
SI derived unit of frequency; SI base unit equivalent: 1E6 s-1
megahertz
MHz
SI derived unit of quantity with dimension of L3; SI base unit equivalent: 1E-18 m3
millimetre to the sixth power per cubic metre
mm6.m-3
SI derived unit of acceleration
metre per second squared
m.s-2
SI derived unit of electrical inductance; SI base unit equivalent: kg.m2.s-2.A-2
henry
H
Dimensionless number, expressed as a fraction of 100; SI base unit equivalent: 0.01
per cent
percent
Conventional unit of time duration of between 28-31 days whereby 12 months amount to one year
month
mon
SI derived unit of sea surface wave directional variance spectral density
square metre second per radian
m2.s.rad-1
Conventional unit of speed, equal to 1 nmi/h; SI base unit equivalent: (1852/3600)m.s-1
knot
kt
SI derived unit of speed; SI base unit equivalent: 0.001 m.s-1
millimetre per second
mm.s-1
milligrams per cubic metre at 25 degrees
mg_m-3_25C
Unit of volume fraction, equivalent to SI derived unit: 1E-6
parts per million by volume
ppmv
SI derived unit of kinematic viscosity, thermal diffusivity, diffusion coefficient
square metre per second
m2.s-1
Conventional unit of time duration, ranging from 365 days to 366 days
year
a
SI derived unit of quantity with dimension of reciprocal length, e.g., optical attenuation coefficients; SI base unit equivalent: 0.001 m-1
per kilometre
km-1
SI derived unit of spectral radiance per unit wavelength; SI base unit equivalent: kg.m-1.s-3
watt per square metre per steradian per metre
W.m-3.sr-1
SI derived unit of speed; SI base unit equivalent: 0.01 m.s-1
centimetre per second
cm.s-1
SI derived unit of time derivative of mass fraction; SI base unit equivalent: 0.001 s-1
gram per kilogram per second
g.kg-1.s-1
SI derived unit of illuminance; SI base unit equivalent: cd.m-2
lux
lx
Unit of plane or phase angle, accepted for use with SI: 1 ' = (pi/10800) rad
minute (angle)
'
Unit of acceleration divided by distance,1 E = 1E-9 Gal/cm; SI base unit equivalent: 1E-9 s-2
Eötvös
E
Unit of angular gradient of sound intensity
decibel per degree (angle)
dB.deg-1
SI base unit of time
second
s
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
microgram per kilogram
ug.kg-1
SI derived unit of volume
cubic metres
m3
SI derived unit of amount per unit mass; SI base unit equivalent: 1E-6 mol.kg-1
micromole per kilogram
umol.kg-1
Astronomical unit of length, 1 pc = 64800/Π AU
parsec
pc
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.
Dobson Unit
DU
SI derived unit of linear mass density or quantity with dimension of M.L-1
kilogram per metre
kg.m-1
SI derived unit of angular velocity; SI base unit equivalent: s-1
radian per second
rad.s-1
Unit of angular speed, accepted for use with SI
degree (angle) per second
deg.s-1
SI derived unit of temperature, as defined by ITS-90; SI base unit equivalent: K, with t/degC = T/K + 273.15
degree Celsius (°C)
degC
SI derived unit of mole fraction; SI base unit equivalent: 1E-6
micromole per mole
umol.mol-1
Conventional unit of pressure, equal to 133.322387415 Pa
millimetre of mercury
mmHg
SI derived unit of spectral intensity, a directional quantity; SI base unit equivalent: kg.m.s-3
watt per metre per steradian
W.m-1.sr-1
SI derived unit of force, weight
newton
N
SI derived unit of spectral radiance per inverse metre; SI base unit equivalent: kg.m.s-3
watt per square metre per steradian per inverse metre
W.m-2.sr-1.m
SI derived unit of spatial gradient of temperature
kelvin per metre
K.m-1
SI derived unit of energy, work, heat; SI base unit equivalent: kg.m2.s-2
joule
J
Unit of radiant exposure, equal to 4.184E7 J.m-2
kilocalory per square centimetre
kcal.cm-2
SI derived quantity with dimension of squared speed
square metre per square second
m2.s-2
SI derived unit of electric charge; SI base unit equivalent: s.A
coulomb
C
SI derived unit of spatial gradient of speed
metre per second per metre
m.s-1.m-1
SI derived unit of mole fraction; SI base unit equivalent: 1
mole per mole
mol.mol-1
Conventional unit of time, equivalent to 604800 s
week
week
Dimensionless number, expressed as a fraction of 1000000; SI base unit equivalent: 0.000001; also referred as parts per million (ppm)
per meg
permeg
The correct value is not known to, and not computable by, the sender of this data. However, a correct value probably exists.
unknown
unknown
SI derived unit of specific energy or specific potential enthalpy; SI base unit equivalent: m2.kg.s-2.kg-1
joule per kilogram
J.kg-1
SI derived unit of frequency; SI base unit equivalent: s-1
hertz
Hz
SI derived unit of luminous flux; SI base unit equivalent: 1 cd = 4π lm for a uniform source emitting in all directions.
lumen
lm
SI derived unit of electrical resistance, impedance, reactance
ohm
Ohm
SI derived unit of mass concentration; SI base unit equivalent: 1E-12 kg.m-3
nanogram per cubic metre
ng.m-3
SI derived unit of speed; SI base unit equivalent: 1/360000 m.s-1
centimetre per hour
cm.h-1
SI derived unit of density, mass density
kilogram per cubic metre
kg.m-3
SI base unit of thermodynamic temperature
kelvin
K
SI derived unit of heat flux density or irradiance; SI base unit equivalent: kg.s-3
watt per square metre
W.m-2
SI derived unit of pressure/stress; SI base unit equivalent: kg.m-1.s-2
pascal
Pa
Conventional unit of spatial gradient of speed; SI base unit equivalent: 1852/3600000 s-1
knot per 1000 metres
kt.km-1
SI derived unit of mass concentration; SI base unit equivalent: 1E-9 kg.m-3
microgram per cubic metre
ug.m-3
Imperial/US unit of length, equal to 1200/3937 metre or 0.3048 metre (approximately)
foot
ft
SI derived unit of radioactivity area concentration; SI base unit equivalent: s-1.m-2
becquerel per square metre
Bq.m-2
Unit of quantity with dimension of reciprocal length, e.g., optical attenuation coefficients; SI base unit equivalent: 1E-6 m-1
per megametre
Mm-1
SI derived unit of volume flow rate or time derivative of volume
cubic metre per second
m3.s-1
SI derived unit of covariance of wind speed and temperature or the product of wind speed and temperature
kelvin metre per second
K.m.s-1
Unit of time, accepted for use with SI: 1 d = 86400 s
day
d
SI derived unit of density or mass concentration; SI base unit equivalent: 1E-6 kg/m3
milligram per cubic metre
mg.m-3
SI derived unit of volumetric radioactivity concentration; SI base unit equivalent: 0.001 s-1.m-3
millibecquerel per cubic metre
mBq.m-3
SI derived unit of specific volume
per cubic metre
m-3
SI derived unit of temporal derivative of pressure/stress; SI base unit equivalent: kg.m-1.s-3
pascal per second
Pa.s-1
Conventional unit of velocity
metre per year
m.a-1
SI derived unit of second order time derivative
per second squared
s-2
Unit of number concentration of viable bacteria or fungal cells in a sample as a result of a plate count test
colony-forming unit per millilitre
CFU.ml-1
Unit of time, accepted for use with SI: 1 min = 60 s
minute (time)
min
SI derived unit of the scattering coefficient at a given direction; SI base unit equivalent: 0.001 m-1
per kilometre per steradian
km-1.sr-1
SI derived unit of amount concentration; SI base unit equivalent: 0.001 mol.m-3
micromole per litre
umol.l-1
Conventional unit of gravity acceleration; g0 = 9.80665 m.s-2
standard acceleration due to gravity
g0
SI derived unit of volumetric mixing ratio, equivalent to ppmv (parts per million by volume); SI base unit equivalent: 1E-6
cubic centimetre per cubic metre
cm3.m-3
SI derived unit of spectral radiance per unit frequency; SI base unit equivalent: kg.s-2
watt per square metre per steradian per hertz
W.m-2.sr-1.Hz-1
The correct value is not readily available to the sender of this data. Furthermore, a correct value may not exist
missing
missing
SI derived unit of area
square metre
m2
SI derived unit of absorbed dose (of ionizing radiation); SI base unit equivalent: m2.s-2
gray
Gy
SI derived unit of quantity with dimension of M-2.T-1
per square kilogram per second
kg-2.s-1
SI derived unit of specific volume; SI base unit equivalent: 1E-6 m-3
per cubic centimetre
cm-3
SI derived unit of the scattering coefficient at a given direction
per metre per steradian
m-1.sr-1
SI derived unit of the quantity with dimension of L^(2/3) T-1
metre to the two thirds power per second
m(2.3-1).s-1
Unit of area, accepted for use with SI: 1 ha = 1E4 m2
hectare
ha
SI derived unit of volumetric mixing ratio, equivalent to ppbv (parts per billion by volume); SI base unit equivalent: 1E-9
cubic millimetre per cubic metre
mm3.m-3
SI derived unit of sea surface wave variance spectral density
square metre second
m2.s
SI derived unit of volume; SI base unit equivalent: 0.001 m3
litre
l
SI derived unit of radioactivity concentration; SI base unit equivalent: s-1.m-3
becquerel per cubic metre
Bq.m-3
SI base unit of mass
kilogram
kg
SI derived unit of frequency; SI base unit equivalent: 1E9 s-1
gigahertz
GHz
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
most probable number index number in 1 millilitre
MPN.ml-1
Imperial/US unit of length, equal to 25.4 millimetres
inch
in
SI prefixed unit of length; SI base unit equivalent: 1000 m
kilometre
km
SI derived unit equivalent to expressing mole fraction in parts per thousand; SI base unit equivalent: 0.001
millimole per mole
mmol.mol-1
SI derived unit of spatial gradient of electrical conductance; SI base equivalent: 0.1 S.m-1
millisiemens per centimetre
mS.cm-1
SI derived unit of spatial gradient of electric conductance
siemens per metre
S.m-1
SI derived unit of pressure/stress; SI base unit equivalent: 100 kg.m-1.s-2
hectopascal
hPa
SI derived unit of pressure or equivalent quantity
newton per square metre
N.m-2
SI derived unit of quantity with dimension of T.L-1
second per metre
s.m-1
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
watt per square metre per steradian per inverse centimetre
W.m-2.sr-1.cm
SI derived unit of frequency; SI base unit equivalent: 1000 s-1
kilohertz
kHz
Units of turbidity from a calibrated nephelometer; SI base unit equivalent: 10-3 kg.m-3
nephelometric turbidity unit
NTU
SI derived unit of spatial gradient of temperature per metre; SI base unit equivalent: K.m-1
degree Celsius per metre
degC.m-1
SI derived unit of equivalent dose (of ionizing radiation); SI base unit equivalent: 0.001 m2.s-2
millisievert
mSv
SI derived unit of time derivative of mass fraction; SI base unit equivalent: s-1
kilogram per kilogram per second
kg.kg-1.s-1
SI derived unit of potential vorticity
kelvin square metre per kilogram per second
K.m2.kg-1.s-1
SI derived unit of electrical capacitance; SI base unit equivalent: kg-1.m-2.s4.A2
farad
F
Unit of mass, accepted for use with SI; SI base unit equivalent: 1000 kg
tonne
t
SI base unit of amount of substance
mole
mol
Unit of length, accepted for use with SI: 1 AU = 149597870700 m, roughly the distance from Earth to the Sun
astronomical unit
AU
SI derived unit of the second moment of area, area moment of inertia
metre to the fourth power
m4
SI derived unit of time derivative of pressure; SI base unit equivalent: 100 kg.m-1.s-3
hectopascal per second
hPa.s-1
SI derived unit of mole fraction; SI base unit equivalent: 1E-9
nanomole per mole
nmol.mol-1
SI derived unit of amount per unit mass; SI base unit equivalent: 1E-15 mol.kg-1
femtomole per kilogram
fmol.kg-1
SI derived unit of area density
kilogram per square metre
kg.m-2
SI prefixed unit of length; SI base unit equivalent: 0.1 m
decimetre
dm
SI derived unit of amount per unit mass; SI base unit equivalent: 1E-9 mol.kg-1
nanomole per kilogram
nmol.kg-1
SI derived unit of volume fraction, equivalent to pptv (parts per trillion by volume); SI base unit equivalent: 1E-12
cubic micrometre per cubic centimetre
um3.cm-3
Unit of area density, equal to 0.1 kg.m-2
(metric) ton per hectare
t.ha-1
There is no value (categorical data)
inapplicable
inapplicable
Unit of plane or phase angle, accepted for use with SI: 1 deg = (pi/180) rad
degree (angle)
deg
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'
N units
N_units
SI derived unit of radiance; SI base unit equivalent: kg.s-3
watt per square metre per steradian
W.m-2.sr-1
SI derived unit of electrical conductance; SI base unit equivalent: kg-1.m-2.s3.A2
siemens
S
SI derived unit of voltage, electrical potential difference, electromotive force; SI base unit equivalent: kg.m2.s-3.A-1
volt
V
SI derived unit of pressure/stress; SI base unit equivalent: 10 kg.m-1.s-2
dekapascal
daPa
SI derived unit of solid angle; SI base unit equivalent: 1
steradian
sr
116
SI derived unit of speed
metre per second
m.s-1
Conventional unit of mass; 1 u = 1 Da (Dalton) = 1.66053906660(50)E-27 kg
unified atomic mass unit
u
Unit of cloud amount, expressed as number of eighths of the sky dome that is covered by clouds; SI base unit equivalent: 0.125
eights of sky covered by cloud
okta
SI derived unit equivalent of mole fraction; SI base unit equivalent: 1E-12
picomole per mole
pmol.mol-1
SI prefixed unit of length; SI base unit equivalent: 1E-9 m
nanometre
nm
Unit of color according to the Platinum/Cobalt or Apha-Hazen scale
Hazen unit
HU
SI prefixed unit of length; SI base unit equivalent: 0.001 m
millimetre
mm
Unit of square of phase or plane angle, accepted for use with SI
square degree (angle)
deg2
Conventional unit, equivalent to per mille; SI based unit equivalent: 0.001
practical salinity unit
psu
SI derived unit of time derivative of pressure, pressure tendency; SI base unit equivalent: 0.1 kg.m-1.s-3
decipascal per second (microbar per second)
dPa.s-1
SI derived unit of time integrated radioactivity concentration; SI base unit equivalent: m-3
becquerel second per cubic metre
Bq.s.m-3
SI base unit of electric current
ampere
A
SI derived unit of spatial gradient of plane angle
radian per metre
rad.m-1
SI derived unit of time derivative of pressure; SI base unit equivalent: 1/108 kg.m-1.s-3
hectopascal per 3 hours
hPa.(3h)-1
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)
geopotential metre
gpm
Unit of volume fraction, equivalent to SI derived unit: 1E-9
parts per billion by volume
ppbv
Measurement unit
SI derived unit of magnetic induction, magnetic flux density; SI base unit equivalent: kg.s-2.A-1
tesla
T
SI derived unit of density, equivalent to kilograms per litre; SI base unit equivalent: 1000 kg.m-3
gram per cubic centimetre
g.cm-3
SI derived unit of spatial gradient of speed; SI base unit equivalent: 0.001 s-1
metre per second per 1000 metres
m.s-1.km-1
SI derived unit of mass concentration; SI base unit equivalent: 1 kg.m-3
milligram per cubic centimetre
mg.cm-3
2024-01-02T17:14:30.589Z
SI derived unit of equivalent dose (of ionizing radiation); SI base unit equivalent: m2.s-2
sievert
Sv
SI derived unit of spatial gradient of temperature per 100 metres; SI base unit equivalent: 0.01 K.m-1
degree Celsius per 100 metres
degC.hm-1
SI derived unit of mass fraction, dimensionless; SI base unit equivalent: 0.001
gram per kilogram
g.kg-1
SI derived unit of amount per unit mass; SI base unit equivalent: 1E-12 mol.kg-1
picomole per kilogram
pmol.kg-1
SI base unit of luminous intensity
candela
cd
Unit of time, accepted for use with SI: 1 h = 3600 s
hour
h
SI derived unit of volume fraction; SI base unit equivalent: 1
cubic metre per cubic metre
m3.m-3
SI derived unit of voltage, electrical potential difference, electromotive force; SI base unit equivalent: 0.001 m2.kg.s-3.A-1
millivolt
mV
Conventional unit of pressure; SI base unit equivalent: 1E-4 kg.m-1.s-2
nanobar
nbar
Conventional unit of time derivative of pressure, pressure tendency; SI base unit: 1000 kg.m-1.s-3
centibar per second
cb.s-1
SI derived unit of pressure/stress, equal to 1000 Pa; SI base unit equivalent: 1000 kg.m-1.s-2
kilopascal
kPa
Conventional unit of pressure, equal to 1 hPa; SI base unit equivalent: 100 kg.m-1.s-2
millibar
mbar
Unit of sound intensity, accepted for use with SI
decibel
dB
SI derived unit of time derivative of pressure; SI base unit equivalent: 1/36 kg.m-1.s-3
hectopascal per hour
hPa.h-1
Measurement unit
SI derived unit of mass concentration; SI base unit equivalent: 1E-6 kg.m-3
microgram per litre
ug.l-1
SI derived unit of quantity with dimension of reciprocal length, e.g., wave number, optical power, curvature, spatial frequency
per metre
m-1
SI derived unit of time derivative of mass area density
kilogram per square metre per second
kg.m-2.s-1
SI derived unit of area; SI base unit equivalent: 1E-4 m2
square centimetre
cm2
SI prefixed unit of length; SI base unit equivalent: 1E-6 m
micrometre
um
SI base unit of length
metre
m
Unit of volume fraction, equivalent to SI derived unit: 1E-12
parts per trillion by volume
pptv
SI derived unit of spatial gradient of electrical conductance; SI base unit equivalent: 1E-4 m-3.kg-1.s3.A2
microsiemens per centimetre
uS.cm-1
SI derived unit of frequency; SI base unit equivalent: 1E12 s-1
terahertz
THz
SI prefixed unit of length; SI base unit equivalent: 0.01 m
centimetre
cm
SI derived unit of speed; SI base unit equivalent: 1/3.6E6 m.s-1
millimetre per hour
mm.h-1
Unit of plane or phase angle, accepted for use with SI: 1 '' = (pi/648000) rad
second (angle)
''
Unit of radioactivity concentration; SI base unit equivalent: 0.001 s-1.m-3
becquerel per litre
Bq.l-1
SI derived unit of radioactivity; SI base unit equivalent: s-1
becquerel
Bq