{"ob_id":44654,"uuid":"9734d6c4da60485db751cf99a5c8623c","title":"Met Office Flux tower hydrometeorological instrument suite","abstract":"Instruments mounted on 1.2m, 2 m and 16 m masts include:\r\n•\tVector Instruments T302 PRT temperature sensors.\r\n•\tScreened and aspirated HMP155s for measuring temperature and relative humidity.\r\n•\tGill HS50 3-D horizontally symmetric ultrasonic anemometers for winds and turbulent heat fluxes.\r\n•\tLicor Li-7500 high-speed open-path hygrometer was located at 16 m.\r\n•\tDelta-T BS5 measured barometric pressure at 1.5 m.\r\n\r\nSurface instrumentation includes:\r\n•\tRainfall is measured with a EML SB500 tipping-bucket gauge with a 0.2 mm accuracy.\r\n•\tScreened and aspirated Rotronics Hydroclip2 measured grass canopy (8 cm) air temperature and RH.\r\nRadiation instrumentation includes:\r\n•\tClear-domed Kipp and Zonen CMP21 pyranometers located at 2 m measured global downwelling, and upwelling components (of wavelength between 0.3-3 μm).\r\n•\tKipp and Zonen CG4 pyrgeometers located at 2 m measured the downwelling and upwelling longwave radiation (4.5–40 μm).\r\n•\tGrass and concrete skin temperatures were measured radiometrically with the Heitronics KT15 pyrometer.\r\n\r\nAerosol and visibility instrumentation includes:\r\n\r\n•\tA Campbell CS120 visiometer located at 2 m measured visual range through air (visibility)\r\nSubsoil instrumentation includes:\r\n•\tDelta-T ML3 theta probes measured volumetric soil moisture at the surface (0-5 cm) and 10 cm depths.\r\n•\tDelta-T ST1 thermistor probes measured soil temperature at 1, 4, 10, 17 cm depths.\r\n•\tHukseflux HFP01SC flux plate measured ground heat flux (2 cm depth).","keywords":"","identifier_set":["https://catalogue.ceda.ac.uk/api/v2/identifiers/13467/?format=json"],"instrumentType":"UNDEFINED","subInstrument":[],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/213844/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/213845/?format=json"]}