Human observation

24 

Concept

stable

(Optical) filter Instrument

58 

Concept

stable

(Ruler for) rain gauge

59 

Concept

stable

(Ultra)sonic anemometer

60 

Concept

stable

Adsorption  scintillation counting

62 

Concept

stable

Aerovane (wind vane with propeller)

63 

Concept

stable

Alpha counting

64 

Concept

stable

Anemometer [general]

65 

Concept

stable

Aneroid barometer (evacuated capsule)

66 

Concept

stable

Anion exchange membrane (AEM)

67 

Concept

stable

Atmometer

68 

Concept

stable

Atmospherics ('sferics') detection

69 

Concept

stable

Atomic absorption spectrophotometry (AAS)

70 

Concept

stable

Atomic emission spectrophotometry (AES)

71 

Concept

stable

BSRN compliant instrument

72 

Concept

stable

Barometer, mercury column

73 

Concept

stable

Barometer, mercuryfree column

74 

Concept

stable

Beta counting

75 

Concept

stable

Bimetal thermometer

76 

Concept

stable

Bowenratio method

77 

Concept

stable

Brewer

78 

Concept

stable

BrewerGDR

79 

Concept

stable

BrewerMast Sonde

80 

Concept

stable

Capacitive rain sensor

82 

Concept

stable

Capillary electrophoresis (CE)

83 

Concept

stable

CarbonIodine Sonde (KC Sonde)

84 

Concept

stable

Colorimetric titration (Gran method)

87 

Concept

stable

Colorimetric titration [general]

88 

Concept

stable

Colorimetry (Saltzman)

90 

Concept

stable

Colorimetry (thorin)

91 

Concept

stable

Conductometry

94 

Concept

stable

Cup anemometer

95 

Concept

stable

Cup anemometer (3 or 4 cups)

96 

Concept

stable

Cuvette

97 

Concept

stable

Denuder

98 

Concept

stable

Denuder

99 

Concept

stable

Disdrometer (drop spectrographs)

102 

Concept

stable

Disjunct eddy covariance method

103 

Concept

stable

Dissipation method

105 

Concept

stable

Dobson

106 

Concept

stable

ECC Sonde

107 

Concept

stable

Eddy accumulation method

108 

Concept

stable

Eddy covariance method

109 

Concept

stable

Electric conductivity (EC meter)

110 

Concept

stable

Electronic pressure transducer (silicon diaphragm)

111 

Concept

stable

Estimation from visual observation

112 

Concept

stable

Evaporation pan andor tank

113 

Concept

stable

Faraday cup photochemistry

114 

Concept

stable

Filter sampling + alpha counting

115 

Concept

stable

Filter sampling + gamma spectrometry

116 

Concept

stable

Flameionization detector (FID)

119 

Concept

stable

Flask sampling (analytical method unspecified)

120 

Concept

stable

Flow injection analyzer (FIA)

121 

Concept

stable

Flux variance method

123 

Concept

stable

Gradient method

125 

Concept

stable

Gravimetry [general]

127 

Concept

stable

High Performance Liquid Chromatography (HPLC)

129 

Concept

stable

Hot wire anemometer

130 

Concept

stable

Hypsometer (water boiling point)

132 

Concept

stable

ICPAES

133 

Concept

stable

ICPMS

134 

Concept

stable

Indian Sonde

135 

Concept

stable

Interferential method

136 

Concept

stable

Ion Chromatography (IC) [general]

137 

Concept

stable

Doppler wind lidar

142 
Light detection and ranging (lidar) with Doppler capability (...

Concept

stable

Raman lidar

143 
Light detection and ranging (lidar) with Raman capability, ty...

Concept

stable

Liquidinglass thermometer (mercuryfree)

144 

Concept

stable

Lysimeter

146 

Concept

stable

Mass balance method

147 

Concept

stable

Mercuryinglass thermometer

149 

Concept

stable

Microbarometer (dewar)

150 

Concept

stable

Microtops

151 

Concept

stable

Microtops

152 

Concept

stable

Microtops

153 

Concept

stable

Microwave profiler

154 

Concept

stable

Microwave radiometry

155 

Concept

stable

Microwave radiometry

156 

Concept

stable

NILU_O_2

157 

Concept

stable

NILU_O_3

158 

Concept

stable

Ozone sonde (unspecified)

166 

Concept

stable

Passive Samplers [general]

167 

Concept

stable

Photoacoustic detection

168 

Concept

stable

Pluviograph

170 

Concept

stable

Potassium iodide (KI) method

171 

Concept

stable

Potentiometry (ionselective electrode)

172 

Concept

stable

Potentiometry (pH meter)

173 

Concept

stable

Pressure balance (piston)

174 

Concept

stable

Pressure plate (solid blade)

175 

Concept

stable

Pressure tube

176 

Concept

stable

Propeller anemometer

177 

Concept

stable

Pyranometer (measurement of IR radiation)

179 

Concept

stable

Pyrradiometer (total global, UV+IR)

180 

Concept

stable

Radio acoustic sounding system (RASS)

181 

Concept

stable

Radio acoustic sounding system (RASS)

182 

Concept

stable

Radio detection and ranging (Radar)

183 

Concept

stable

Radio detection and ranging (Radar) profiler

184 

Concept

stable

Radiochemical Methods [general]

185 

Concept

stable

Regener Sonde (chemiluminescence)

186 

Concept

stable

Resistance thermometer, thermistor

188 

Concept

stable

SAOZ (UVvis diode array spectrometer)

189 

Concept

stable

Scatterometer

190 

Concept

stable

Separation + manometric determination

191 

Concept

stable

Sonic thermometer

195 

Concept

stable

Sound detection and ranging (Sodar) profiler

196 

Concept

stable

SunphotometryFilter Radiometry

197 

Concept

stable

Sunshine duration

198 

Concept

stable

Surface chamber

199 

Concept

stable

Thermocouple, thermopile

201 

Concept

stable

Tipping bucket rain gauge (totalizer)

204 

Concept

stable

Titration

205 

Concept

stable

Transmissometer

207 

Concept

stable

Transport modeling (model unspecified)

208 

Concept

stable

Turbidity measurement

209 

Concept

stable

Umkehr method

210 

Concept

stable

Volumetric measurement

211 

Concept

stable

Weighing type rain gauge (totalizer)

212 

Concept

stable

Wet Chemical Methods [general]

213 

Concept

stable

Wind sock (textile tube)

214 

Concept

stable

Wind vane (solid blade)

215 

Concept

stable

Aerodyne mass spectrometer (AMS)

217 

Concept

stable

EUSAAR protocol

218 

Concept

stable

Filter + beta attenuation (betameter, beta gauge)

219 

Concept

stable

Filter + light attenuation (aethalometer)

220 

Concept

stable

Mass Spectrometry (MS) [general]

221 

Concept

stable

Monitor for AeRosols and GAses (MARGA)

222 

Concept

stable

Particle induced xray emission (PIXE)

223 

Concept

stable

Particle soot absorption photometry (PSAP)

224 

Concept

stable

Thermooptical analyzer (Sunset Labs)

225 

Concept

stable

Xray fluorescence (XRF)

226 

Concept

stable

Aerodynamic particle sizing spectrometer (APS)

227 

Concept

stable

Aerosol backscatter sonde

228 

Concept

stable

Light scattering

229 

Concept

stable

Nephelometry, integrating

230 

Concept

stable

Cloud condensation nuclei (CCN) counter

231 

Concept

stable

Condensation particle counter (CPC)

232 

Concept

stable

Continuous gravimetry

233 

Concept

stable

Differential mobility particle sizer (DMA, DMPS)

234 

Concept

stable

Diffusion battery

235 

Concept

stable

Electric mobility [general]

236 

Concept

stable

Electrostatic classifier

237 

Concept

stable

Multiangle absorption photometry (MAAP)

238 

Concept

stable

Multistage impactor

239 

Concept

stable

Optical particle counter (OPC)

240 

Concept

stable

Scanning mobility particle sizer (SMPS)

241 

Concept

stable

Twomey static thermal diffusion chamber

242 

Concept

stable

Suntracking photometry

244 

Concept

stable

Ceilometer

245 

Concept

stable

Flexpart (dispersion modeling)

246 

Concept

stable

Flextra (trajectory modeling)

247 

Concept

stable

Hysplit (trajectory modeling)

248 

Concept

stable

Lagranto (trajectory modeling)

249 

Concept

stable

Thin film capacitance

250 

Concept

stable

Chilled mirror

251 

Concept

stable

Lithium chloride (LiCl)

252 

Concept

stable

Hair hygrometerhygrograph

253 

Concept

stable

Hygrometer [general]

254 

Concept

stable

IR absorption hygrometer

255 

Concept

stable

Optical hygrometer

256 

Concept

stable

UV fluorescencebased hygrometer (Lymanα)

257 
Detection of UV fluorescence signal emitted by the excited OH...

Concept

stable

Electrical aspiration (Frankenberger type)

258 

Concept

stable

Mechanical aspiration

259 

Concept

stable

Bimetallic actinograph

263 

Concept

stable

Pyrheliometer (direct solar, broadband)

264 

Concept

stable

Pyrgeometer (global, infrared)

265 

Concept

stable

Pyranometer (global solar, broadband)

266 

Concept

stable

Spectral pyranometer

267 

Concept

stable

UVvis spectrometryradiometry

268 

Concept

stable

Tetrachloromercurate (TCM) absorption  CL

270 

Concept

stable

Colorimetry (ANSA)

271 

Concept

stable

Colorimetry (Griess)

272 

Concept

stable

Colorimetry (indophenol, Bertholet)

273 

Concept

stable

Colorimetry (mercury thiocyanate+iron alum)

274 

Concept

stable

Colorimetry (NEDA)

275 

Concept

stable

Colorimetry (Nessler, K2HgI4)

276 

Concept

stable

Colorimetry (sodium salicylate method for nitrate)

277 

Concept

stable

Colorimetry [general]

278 

Concept

stable

Filter sampling (analytical method unspecified)

279 

Concept

stable

Adsorption tube (charcoal) + elution + GC

280 

Concept

stable

Filter sampling + combustion + IC

281 

Concept

stable

Filter sampling + combustion + other

282 

Concept

stable

Filter sampling + extraction + IC

283 

Concept

stable

Filter sampling + extraction + other

284 

Concept

stable

Filter sampling + gravimetry

285 

Concept

stable

Impregnated filter

286 

Concept

stable

Catalytic conversion 'Au'  CL

287 

Concept

stable

Catalytic conversion 'Fe'  CL

288 

Concept

stable

Catalytic conversion 'Mb'  CL

289 

Concept

stable

Chemiluminescence (CL) [general]

290 

Concept

stable

Photolytic conversion  CL

291 

Concept

stable

Monitor for AeRosols and GAses (MARGA) Metrohm

292 

Concept

stable

Filter sampling + photo multiplier tube (PMT)

293 

Concept

stable

Fluorescence [general]

294 

Concept

stable

UV fluorescence

295 

Concept

stable

Vacuum UV fluorescence

296 

Concept

stable

Gas Chromatography (GC) [general]

297 

Concept

stable

GCECD

298 

Concept

stable

GCECDFID

299 

Concept

stable

GCECDMS

300 

Concept

stable

GCFID

301 

Concept

stable

GCHgO reductionUV absorption

302 

Concept

stable

GCMS

303 

Concept

stable

H2O2 conversion  IC

304 

Concept

stable

Cavity ringdown spectroscopy (CRDS)

305 

Concept

stable

Cavityenhanced absorption spectroscopy (CEAS)

306 

Concept

stable

Integrated cavity output spectroscopy (ICOS)

307 

Concept

stable

Laser induced fluorescence (LIF)

308 

Concept

stable

Laser photoacoustic spectroscopy (LPAS)

309 

Concept

stable

Laser spectroscopy [general]

310 

Concept

stable

Quantum cascade laser (QCL) spectroscopy

311 

Concept

stable

Chemical ionization MS (CIMS) with matrix isolation

312 

Concept

stable

Proton transfer reaction mass spectrometry (PTRMS)

313 

Concept

stable

IR spectrometryradiometry [general]

314 

Concept

stable

Light absorption photometry

315 

Concept

stable

Long path absorption photometry (LOPAP)

316 

Concept

stable

Nondispersive IR (NDIR) absorption

317 

Concept

stable

Nondispersive UV (NDUV)

318 

Concept

stable

UV absorption spectrometryradiometry

319 

Concept

stable

Integrated path differential absorption (IPDA) lidar

320 
Light detection and ranging (lidar) with integrated path diff...

Concept

stable

Differential optical absorption (DOAS)

321 

Concept

stable

Fouriertransform IR spectroscopy (FTIR)

322 

Concept

stable

TCCON Fouriertransform IR spectroscopy (TCCONFTIR)

323 

Concept

stable

Radiosonde with NAVAID

327 

Concept

stable

Radiosonde with radar tracking

328 

Concept

stable

Radiosonde with radiotheodolite tracking

329 

Concept

stable

Radiosonde with composite method tracking

330 

Concept

stable

Radiosonde (tracking unspecified)

331 

Concept

stable

Pilot balloon with optical tracking)

332 

Concept

stable

Differential absorption lidar (DIAL)

335 
Light detection and ranging (lidar) with differential absorpt...

Concept

stable

Microwave radiometry

336 

Concept

stable

Tunable diode lase spectroscopy (TDLS)

338 
Tunable diode lase spectroscopy (TDLS)

Concept

stable

UV spectroradiometry

339 

Concept

stable

Wetbulb thermometer

340 
A thermometer having a bulb that is kept moistened when humid...

Concept

stable

Backscatter lidar

341 
Elastic backscatter light detection and ranging (lidar) typic...

Concept

stable

High spectral resolution (HSR) lidar

342 
Light detection and ranging (lidar) with high spectral resolu...

Concept

stable

Fog collection

343 
Collection of fog using a mesh or similar capturing device an...

Concept

stable

GCCVAFS

344 
Gas chromatography and detection by cold vapour atomic fluore...

Concept

stable

GCTCD

345 
Gas chromatography and detection by a thermal conductivity de...

Concept

stable

Electrostatic collection + alpha counting

346 
Alpha counting after electrostatic collection of measurand.

Concept

stable

Tunable Infrared Laser Differential Absorption Spectroscopy (TILDAS)

347 
Tunable Infrared Laser Differential Absorption Spectroscopy (...

Concept

stable

Radionuclide decay counting [general]

348 
Determination of the counts measured per unit time as a resul...

Concept

stable

IRGFC

349 
Infrared absorption measurement based on the gasfilter corre...

Concept

stable

inapplicable

inapplicable 
None of the codes in the table are applicable in the context ...

Concept

stable

unknown

unknown 
The measurement/observing method is unknown.

Concept

stable
