observed_variable

Download csv version observed_variable

variable	parameter_group	domain	sub_domain	name	units	description
0	aerosols			aerosol absorption optical depth	Dimensionless	Vertical column integral of spectral aerosol absorption coefficient: AAOD = exp(-K. Dz) where K is the absorption coefficient [km-1] and Dz the vertical path [km]
1	aerosols			aerosol column burden	g m-2	2D field of the column burden of condensed particles in the atmosphere
2	aerosols			aerosol dust concentration	g kg-1	3-D field of concentration of dust or sand in the atmosphere
3	aerosols			aerosol effective radius	micro m	3D field of mean aerosol particle size, defined as the ratio of the third and second moments of the number size distribution of aerosol particles. Requested in the troposphere (assumed height: 12 km) and as columnar average.
4	aerosols			aerosol extinction coefficient	m-1	3D field of spectral volumetric extinction cross-section of aerosol particles.
5	aerosols			aerosol mass mixing ratio	g kg-1	3D field of the mass mixing ratio of condensed particles in the atmosphere
6	aerosols			aerosol optical depth	Dimensionless	The AOD is the effective depth of the aerosol column from the viewpoint of radiation propagation: Vertical column integral of spectral aerosol extinction coefficient AOD = exp(-K. Dz) where K is the extinction coefficient [km-1 ] and Dz the vertical path [km]
7	aerosols			aerosol species mole fraction	moles per mole of dry air	3D field of the mole fraction of condensed-phase chemical species (e.g., sulfate, nitrate, ammonium, elemental carbon, organic carbon), in the atmosphere
8	aerosols			aerosol species total column burden	moles m-2	2D field of the total column burden concentration of condensed-phase chemical species (e.g., sulfate, nitrate, ammonium, elemental carbon, organic carbon), in the atmosphere
9	aerosols			aerosol type	coded	Selection, out of a pre-defined set of aerosol classes, that best fits an input data set (observed or modeled). The pre-defined set of aerosol classes includes specification of the particle composition, mixing state, complex refractive index, and shape as a function of particle size. The definition of aerosol type includes specification of all the classes as well as the algorithm used to choose the best fit to the input data.
10	aerosols			aerosol volcanic ash	g kg-1	3D field of mass mixing ratio of volcanic ash
11	aerosols			total column aerosol volcanic ash	g m-2	Field of total column mass of volcanic ash
12	aerosols			air conductivity	km	TBD
13	albedo			blue ice and snow albedo	percent	TBD
14	albedo			blue ice bidirectional reflectance	sr-1	TBD
15	albedo			clean glacier ice albedo	percent	TBD
16	albedo			dirty glacier ice albedo	percent	TBD
17	albedo			earth surface albedo	percent	Hemispherically integrated reflectance of the Earth surface in the range 0.4 - 0.7 micro-m
18	albedo			snow bidirectional reflectance	sr-1	TBD
19	cloud	atmospheric	upper-air	cloud base height	m	cloud base height (hb)
20	cloud	atmospheric	upper-air	cloud base lowest height	coded	Height above surface of the base of the lowest cloud seen (coded 0-9)
21	cloud	atmospheric	upper-air	cloud cover	Okta or percent	3D field of fraction of sky filled by clouds.
22	cloud	atmospheric	upper-air	cloud genus	Coded	Genus of cloud (0 - Cirrus to 9 - Cumulo-Nimbus)
23	cloud	atmospheric	upper-air	cloud genus base height	Coded or m	Height of base of cloud whose genus is c
24	cloud	atmospheric	upper-air	high cloud type	coded	type of high clouds (ch)
25	cloud	atmospheric	upper-air	low cloud type	coded	type of low clouds (cl)
26	cloud	atmospheric	upper-air	lowest cloud amout	Okta	low or (if low clouds don’t exist) middle cloud amount
27	cloud	atmospheric	upper-air	middle cloud type	coded	type of middle clouds (cm)
28	cloud	atmospheric	upper-air	total cloud amount	Okta	total amount of clouds
29	evaporation	atmospheric		evaporation	mm	TBD
30	evaporation	atmospheric		evaporation	kg m-2 s-1	TBD
31	evaporation	atmospheric		potential evapotranspiration	mm day-1	Quantity of water evaporated from the soil and plants when the ground is at its natural moisture content.
32	evaporation	atmospheric		real evapotranspiration	mm day-1	TBD
33	humidity	atmospheric		absolute humidity	g m-3	measure of water vapor (moisture) in the air, regardless of temperature
34	humidity	atmospheric	surface; upper-air	dew point depression	K	Dew point depression is also called dew point deficit. It is the amount by which the air temperature exceeds its dew point temperature. Dew point temperature is the temperature at which a parcel of air reaches saturation upon being cooled at constant pressure and specific humidity.
36	humidity	atmospheric	surface; upper-air	dew point temperature	K	Dew point temperature is the temperature at which a parcel of air reaches saturation upon being cooled at constant pressure and specific humidity.
37	humidity	atmospheric	surface; upper-air	ice bulb temperature	K	TBD
38	humidity	atmospheric	surface; upper-air	relative humidity	percent	Relative humidity is the ratio of the amount of atmospheric moisture present relative to the amount that would be present if the air were saturated with respect to water or ice to be specified in the metadata
39	humidity	atmospheric	surface; upper-air	specific humidity	g kg-1	specific means per unit mass. Specific humidity is the mass fraction of water vapor in (moist) air.
40	humidity	atmospheric		water vapour pressure	hPa	TBD
41	humidity	atmospheric	surface; upper-air	wet bulb temperature	K	TBD
43	ice			ice thickness	m	Thickness of the ice sheet. It is related to sea-ice elevation and ice density
44	precipitation	atmospheric		accumulated precipitation	mm	accumulated precipitation over specified period
45	precipitation	atmospheric		fresh snow	mm	TBD
46	precipitation	atmospheric		hydrometeor type	Code table	3D field of the predominant form of condensed water in a volume of free atmosphere, including liquid cloud, rain, ice crystals, snow, graupel and hail. (This variable replaces “precipitation type”).
47	precipitation	atmospheric		precipitation	g m-2 s-1	Precipitation (liquid or solid)
48	precipitation	atmospheric		precipitation instensity liquid	mm h-1	Precipitation intensity at surface (liquid or solid)
49	precipitation	atmospheric		precipitation intensity solid	mm h-1	Precipitation intensity at surface (solid)
50	precipitation	atmospheric		precipitation type	coded	Liquid, snow, hail, fog
51	precipitation	atmospheric		rainy days	Days	TBD
52	precipitation	atmospheric		snow cover	percent	Fraction of a given area which is covered by snow
53	precipitation	atmospheric		snow depth	cm	Vertical distance from the snow surface to the underlying surface (ground, glacier ice or sea ice).
54	precipitation	atmospheric		snow status	coded	Wet or dry
55	precipitation	atmospheric		snow water equivalent	mm	Surface snow amount
56	pressure	atmospheric	surface	adjunct temperature barometer	K	temperature of the adjunct thermometer to the barometer to reduce pressure to 0 degC
57	pressure	atmospheric	surface	air pressure	Pa	pressure of air column at specified height
58	pressure	atmospheric	surface	air pressure at sea level	Pa	sea level means mean sea level, which is close to the geoid in sea areas. Air pressure at sea level is the quantity often abbreviated as MSLP or PMSL.
59	pressure	atmospheric	surface	pressure tendency	Pa	pressure tendency
60	pressure	atmospheric	surface	pressure tendency characteristics	coded	characteristic of pressure tendency (used in synoptic maps)
61	radiation	atmospheric		diffuse radiation	W m-2	The component of global radia-tion that is scattered out of the solar beam by at-mospheric constituents. It is also called diffuse hori-zontal irradiance.
62	radiation	atmospheric		downward longwave irradiance at earth surface	W m-2	Flux density of radiation emitted by the gases, aerosols and clouds of the atmosphere to the Earth’s surface
63	radiation	atmospheric		downward shortwave irradiance at earth surface	W m-2	Flux density of the solar radiation at the Earth surface
64	radiation	atmospheric		downward shortwave irradiance at toa	W m-2	Flux density of the solar radiation at the top of the atmosphere
65	radiation	atmospheric		earth surface shortwave bidirectional reflectance	percent	Reflectance of the Earth surface as a function of the viewing angle and the illumination angle in the range 0.4-0.7 micro m . The distribution of this variable is represented by the Bidirectional Reflectance Distribution Function (BRDF)
66	radiation	atmospheric		fraction of absorbed par	percent	Fraction of PAR absorbed by vegetation (land or marine) for photosynthesis processes (generally around the ‘red’ )
67	radiation	atmospheric		global radiation	W m-2	The part of the global radiation in-cident on a surface orthogonal (or “normal”) to the sun’s beam, which originates from the solid angle subtended by the sun’s disk. It is also called direct normal irradiance.
68	radiation	atmospheric		longwave earth surface emissivity	percent	TBD
69	radiation	atmospheric		longwave radiation	W m-2	TBD
70	radiation	atmospheric		meteorological optical range	m	Meteorological optical range at surface
71	radiation	atmospheric		photosynthetically active radiation	W m-2	Flux of downwelling photons of wavelength 0.4-0.7 micro m
72	radiation	atmospheric		shortwave cloud reflectance	percent	Reflectance of the solar radiation from clouds
73	radiation	atmospheric		shortwave radiation	W m-2	TBD
74	radiation	atmospheric		solar gamma ray flux	W m-2	Radiative flux integrated over the gamma-ray domain.
75	radiation	atmospheric		solar UV flux	W m-2	Integrated UV flux over the solar disk.
76	radiation	atmospheric		solar VIS flux	W m-2	Integrated VIS flux over the solar disk
77	radiation	atmospheric		solar X ray flux	W m-2	Integrated X-ray flux over the solar disk
78	radiation	atmospheric		sunshine duration	h	TBD
79	radiation	atmospheric		upward longwave irradiance at Earth surface	W m-2	Flux density of terrestrial radiation emitted by the Earth surface
80	radiation	atmospheric		upward longwave irradiance at TOA	W m-2	Flux density of terrestrial radiation emitted by the Earth surface and the gases, aerosols and clouds ot the atmosphere at the top of the atmosphere
81	radiation	atmospheric		upward shortwave irradiance at TOA	W m-2	Flux density of solar radiation, reflected by the Earth surface and atmosphere, emitted to space at the top of the atmosphere
82	radiation	atmospheric		upward spectral radiance at TOA	W m-2 nm-1 sr-1	Upward radiant power measured at the top of the atmosphere per area unit, per solid angle, and per wavelength interval. Spectral range 0.2-200 micro m.
83	salinity	oceanic	surface; sub-surface	salinity	psu	ocean salinity (PSU)
85	temperature	atmospheric	surface; upper-air	air temperature	K	Air temperature is the bulk temperature of the air, not the surface (skin) temperature.
86	temperature	atmospheric		daily maximum air temperature	K	TBD
87	temperature	atmospheric		daily maximum air temperature with direct sun exposure	K	TBD
88	temperature	atmospheric		daily maximum grass temperature	K	Grass maximum thermometer is 5 cm above ground
89	temperature	atmospheric		daily minimum air temperature	K	TBD
90	temperature	atmospheric		daily minimum air temperature with direct sun exposure	K	TBD
91	temperature	atmospheric		daily minimum grass temperature	K	Grass minimum thermometer is 5 cm above ground
92	temperature	atmospheric		days with ground frost	Days	TBD
93	temperature	atmospheric		snow temperature	K	TBD
94	temperature	atmospheric		soil temperature	K	Lot 1 is using Ts - WMO abbrev.
95	temperature	oceanic	surface; sub-surface	water temperature	K	Water (sea, river, lake) temperature at depth indicated
96	visibility	atmospheric	surface	horizontal visibility in air	m	The visibility is the distance at which something can be seen.
97	weather			lightning detection	deg (lat, lon) and UTC	Detection of the time and location (latitude, longitude) of lightning events. Accuracy expressed in terms of Hit Rate and False Alarm Rate, which requires predetermination of a specific distance and time tolerance .
98	weather			lightning duration	s	TBD
99	weather			lightning horizontal distance	Km	TBD
100	weather	atmospheric	surface	past weather 1	coded	past weather 1 - most extreme phomenon (w)
101	weather	atmospheric	surface	past weather 2	coded	past weather 2 - most frequent phomenon (used in synoptic maps)
102	weather	atmospheric	surface	present weather	coded	present weather (ww)
103	weather			Total lightning density	Dimensionless	Total number of detected flashes in the corresponding time interval and the space unit. The space unit (grid box) should be equal to the horizontal resolution and the accumulation time to the observing cycle
104	wind	atmospheric	surface; upper-air	eastward wind speed	m s-1	Eastward indicates a vector component which is positive when directed eastward (negative westward). Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward air velocity.)
105	wind	atmospheric	surface; upper-air	northward wind speed	m s-1	Northward indicates a vector component which is positive when directed northward (negative southward). Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward air velocity.)
106	wind	atmospheric	surface; upper-air	wind from direction	degree	direction from which the wind is blowing Lot 1 uses dd - WMO abbrev.
107	wind	atmospheric	surface; upper-air	wind speed	m s-1	Speed is the magnitude of velocity. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward air velocity.) The wind speed is the magnitude of the wind velocity. Lot 1 uses ff - WMO abbrev.
108	wind	atmospheric	surface	wind speed of gust	m s-1	Speed is the magnitude of velocity. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward air velocity.) The wind speed is the magnitude of the wind velocity. A gust is a sudden brief period of high wind speed. In an observed timeseries of wind speed, the gust wind speed can be indicated by a cell methods of maximum for the time-interval. In an atmospheric model which has a parametrised calculation of gustiness, the gust wind speed may be separately diagnosed from the wind speed. Lot 1 uses fx - WMO abbrev.
109	wind	atmospheric		wind speed max	m s-1	Maximum observed wind speed over specified period Lot 1 uses fm - WMO abbrev.
110				turbulence	J m-3	TBD
111				precipitable water column	kg m-2	TBD
112				tropopause height	m	TBD
113				tropopause temperature	K	TBD
114				tropopause pressure	Pa	TBD
115				tropopause potential temperature	K	TBD
116				frost point temperature	K	TBD
117	pressure	atmospheric	surface; upper air	geopotential height	m	height of a standard or significant pressure level in meters
118	pressure	atmospheric	surface; upper air	geopotential height decameters	decametres	height of a standard or significant pressure level in decameters
119	temperature	atmospheric	surface; upper air	vertical gradient of temperature	K m-1	vertical variation of temperature
120	temperature	atmospheric	surface; upper air	vertical gradient of potential temperature	K m-1	vertical variation of potential temperature
121	temperature	atmospheric	surface; upper air	equivalent potential temperature	K	temperature a parcel of air would reach if all the water vapor in the parcel were to condense, releasing its latent heat, and the parcel was brought adiabatically to a standard reference pressure, usually 1000 hPa
122	wind	atmospheric	surface; upper air	vertical speed of radiosonde	m s-1	vertical speed of radiosonde ascent
123	humidity	atmospheric	upper air	water vapour mixing ratio	mol mol-1	Volume mixing ratio (mol/mol) of water vapor calculated using Hyland, R. W. and A. Wexler, Formulations for the Thermodynamic Properties of the saturated Phases of H2O from 173.15K to 473.15K, ASHRAE Trans, 89(2A), 500-519, 1983
124	humidity	atmospheric	upper air	air relative humidity effective vertical resolution	s	Resolution (defined by 1 / cut off frequency) of the relative humidity in terms of time
125	pressure	atmospheric	upper-air	altitude	m	Altitude
126	temperature	atmospheric	surface; upper air	air temperature	K	Air temperature (from profile measurement)
137	humidity	atmospheric	surface; upper air	air dewpoint	K	Dewpoint measurement (from profile measurement)
138	humidity	atmospheric	surface; upper air	relative humidity	1	Relative humidity (from profile measurement)
139	wind	atmospheric	surface; upper air	eastward wind speed	m s-1	Eastward wind speed (from profile measurement)
140	wind	atmospheric	surface; upper air	northward wind speed	m s-1	Northward wind speed (from profile measurement)
141	radiation	atmospheric	surface; upper air	Solar zenith angle	degrees	solar zenith angle
142	pressure	atmospheric	upper air	pressure	Pa	pressure
143				time since launch	s	Time since launch of radiosonde
144		atmospheric	upper-air	monthly total ozone column	DU	Monthly value of total column ozone amount
145		atmospheric	upper-air	monthly standard deviation ozone		Standard deviation of daily total column ozone
146				monthly total ozone column number of points	count	The number of points (typically this is the number of daily averages) used to estimate the monthly mean ozone value
147		atmospheric	upper-air	standard deviation ozone		Estimated population standard deviation of the total column ozone measurements used for the daily value.
148				number of points		Number of observations used to calculate the total column ozone value
149		atmospheric	upper-air	column sulphur dioxide	DU	The daily total column sulphur dioxide (SO2) amount calculated as the mean of the individual SO2 amounts
150		atmospheric	upper-air	ozone partial pressure	Pa	Level partial pressure of ozone in milli-Pascals (mPa)
151		atmospheric	upper-air	ozone concentration	ppmv	Level mixing ratio of ozone in ppmv
152		atmospheric	upper-air	total ozone column	DU	Ozone (DU) integrated up to the current altitude level
153		atmospheric	upper-air	flight summary integrated O3	DU	Ozone amount integrated over the whole balloon profile.
154				sampling method burst ozone pressure	Pa	Atmospheric pressure when balloon burst in hPa.
155	lidar	atmospheric		measurement_wavelength	nm	Wavelength of the transmitted laser pulse
156	lidar	atmospheric		integrated_backscatter	1/sr	integrated backscatter
157	lidar	atmospheric		lidar_ratio	sr	aerosol extinction-to-backscatter ratio
158	lidar	atmospheric		aerosol_boundary_layer	m	altitude of the upper bound of the aerosol planet boundary layer
159	lidar	atmospheric		h63_of_aerosol_optical_depth	m	altitude below which stays the 63% of the total aerosol optical depth
160	lidar	atmospheric		h63_of_integrated_backscatter	m	altitude below which stays the 63% of the total integrated backscatter
161	lidar	atmospheric		center_of_mass	m	center of mass
162	lidar	atmospheric		particle_depolarization	1	aerosol linear particle depolarization ratio
163	lidar	atmospheric		angstrom_coefficient	1	angstrom coefficient
164	lidar	atmospheric		base_layer_altitude		Frequency distribution of the base layer altitude values
165	lidar	atmospheric		top_layer_altitude		Frequency distribution of the top layer altitude values
166	lidar	atmospheric		center_of_mass_altitude		Frequency distribution of the center of mass altitude values
167	Global Navigation Satellite System	atmosphere	surface;upper-air	zenith_total_delay	m	This parameter characterizes the delay of the GNSS signal on the path from a satellite to the receiver due to atmospheric refraction and bending, mapped into the zenith direction. It is expressed as an equivalent distance travelled additionally by the radio waves, due to the atmosphere. The numerical value of zenith total delay correlates with the amount of total column water vapour (i.e., not including effects of liquid water and/or ice) above the GNSS receiver antenna. It is hence used to estimate the total column water vapour.
168	Global Navigation Satellite System	atmosphere	surface;upper-air	zenith tropospheric delay	m	This parameter characterizes the delay through the troposphere of the GNSS signal on the path from a satellite to the receiver due to atmospheric refraction and bending, mapped into the zenith direction. It is expressed as an equivalent distance travelled additionally by the radio waves, due to the atmosphere.
169	humidity	atmospheric	surface	wetness	Ohms	Ohms The presence or absence of moisture due to precipitation, in Ohms. High values (>= 1000) indicate an absence of moisture. Low values (< 1000) indicate the presence of moisture
170	humidity	atmospheric	surface	soil_moisture	m3 m-3	Ratio of water volume over sample volume (m^3 water/m^3 soil)