Continuous measurements are made using a Kipp & Zonen CNR4 net flux radiometer. It measures both downwelling and upwelling radiation in 2 wavelength bands which are common to many similar instruments. A shorter wavelength band measures radiation received from the sun. It encompasses the visible spectrum, together with near infrared and longer wavelength ultraviolet, over a wavelength range of approximately 0.29 - 2.8 µm. It shows a clear response to the day/night cycle. Clouds and other aerosols reduce the detected radiation. A longer wavelength band measures longer wavelength infrared radiation (approximately 4.5 - 32 µm) produced by emission from the atmosphere and earth's surface. It does not respond significantly to the day/night cycle but changes according to the time of year and degree of cloud cover.

Data were collected by the Chilbolton Facility for Atmospheric and Radio Research (CFARR) Infra-Red Radiometer from 10th of May 2001 to the present at Chilbolton, Hampshire. The dataset contains measurements for both sky and surface emitted infrared radiation, from 4.5 to 42 µm.

This dataset contains hourly averaged 4-pi filter radiometer measurements of the rate constant of NO2 photolysis, j(JNO2) from both downwelling radiation (direct and diffuse radiation from the above atmosphere) and upwelling (diffuse radiation from the atmosphere below). Data are reported in s^-1. Measurements made at Auchencorth Moss (55ᵒ47’36” N, 3°14’41” W), for more information see http://www.auchencorth.ceh.ac.uk/. The instrument was situated in a clear section of the site, 3 m above ground level. The surface cover consisted of long grasses (~15 cm), often covered by frost/snow in the winter months (December - February). Data were collected between 2018/11/21 12:00 - 2019/11/20 23:00, using a j(NO2) 4-pi filter radiometer manufactured by Meteorologie Consult GmbH (MetCon) measuring broadband actinic flux between ~310-420 nm. The instrument was operated and data were collected by staff at the UK Centre for Ecology & Hydrology. Most of the missing data are between 2019/06/13-25, due to the instrument being relocated for calibration. Other incidences of missing data occur due to power cuts at the site and problems with the data collection. This data comprises the start of a long-term time series of filter radiometer measurements at Auchencorth Moss, in order to provide data access to evaluate j-values in current radiation models and parameterisations. The ongoing operation of the j(NO2) filter radiometer is supported by the UK Natural Environment Research Council award number NE/R016429/1 as part of the UK-SCAPE programme delivering National Capability.

Data were collected by the Chilbolton Facility for Atmospheric and Radio Research (CFARR) Radiometrics Radiometer from the 23rd of August 2007 to the present at Chilbolton, Hampshire. The dataset contains measurements of the total liquid water at zenith, together with the vertical profile of water vapour density. Accuracy of integrated water vapour (IWV) retrieval: ~1 – 2 mm Accuracy of total liquid water path (LWP) retrieval: ~15% in non-precipitating conditions.

Data were collected by the Chilbolton Facility for Atmospheric and Radio Research (CFARR) Visible Radiometer from 10th of May 2001 to the present at Chilbolton, Hampshire. The dataset contains measurements of Calibrated brightness temperature measured at 21 frequencies (selectable) between 22.0 and 30.0 GHz, water vapour profile, and integrated water vapour (IWV). Data are produced once every approximately 2 minutes.

Chemistry of the Antarctic Boundary Layer and the Interface with Snow (CHABLIS) is a Natural Environment Research Council (NERC) and Antarctic Funding Initiative (AFI) funded project, aimed at studying the chemistry of the Antarctic Boundary Layer in greater detail, and for a longer duration, than has previously been attempted. Field measurements were carried out at the British Antarctic Survey station, Halley, at the Clean Air Sector Laboratory (CASLab). Year-round measurements began in February 2004, and a summer campaign focussing on oxidants ran during January/February 2005, after which CHABLIS fieldwork ended. The dataset contains actinic fluxes measured by the BAS spectroradiometer at Halley. Access to this dataset is now public.

Data were collected by the Chilbolton Facility for Atmospheric and Radio Research (CFARR) Visible Radiometer from 10th of May 2001 to the present at Chilbolton, Hampshire. The dataset contains measurements of high accuracy total global, or diffuse sky, solar radiation measurement research on a plane/level surface, for extreme temperature environments.

Data were collected by the Chilbolton Facility for Atmospheric and Radio Research (CFARR) Direct Visible Radiometer from 27th Februrary 2013 to the present at Chilbolton, Hampshire. The dataset contains measurements of high accuracy direct solar radiation measurement research on a plane/level surface.

This collection contains a range of in situ observations of meteorological and air-sea interaction processes from a range of instruments on several platforms (buoy, ship , radiosonde) from the Iceland Greenland seas Project (IGP). The Iceland Greenland seas Project (IGP) was an international project involving the UK, US and Norwegian research communities. The UK component was funded by NERC, under the Atmospheric Forcing of the Iceland Sea (AFIS) project (NE/N009754/1)

Global three-hourly cloud products as produced for the International Satellite Cloud Climatology Project (ISCCP) at the Goddard Institute for Space Studies in New York. The data on are the ISCCP Stage D2 data (ISCCP-D2), at 280 km spatial resolution. There are 202 variables contained within the dataset, which is at three-hourly temporal resolution. The data available at the time of publication of this dataset record in this archive have been obtained from the NASA Atmospheric Data Center (ASDC) and begin in July 1983 and extend to June 2006. A fuller dataset is available directly from ASDC - see link on this record. The data are from a number of radiometers deployed on NOAA, GOES (Geostationary Operational Environmental Satellite), METEOSAT, GMS and INSAT satellites operational during this period. This dataset is public. The data periods for the various satellite instruments used within this generation of this dataset are given below: Advanced Very High Resolution Radiometer (AVHRR) versions 1,2 and 3: - AVHRR on NOAA-7: 01/07/1983 to 31/01/1985 - AVHRR on NOAA-8: 01/10/1983 to 24/06/1984 - AVHRR on NOAA-9: 01/02/1985 to 08/11/1988 - AVHRR on NOAA-10: 17/11/1986 to 30/08/1991 - AVHRR on NOAA-11: 30/06/1997 to 18/10/1998 - AVHRR/2 on NOAA-12: 01/09/1991 to 31/12/1998 - AVHRR/2 on NOAA-14: 01/02/1995 to 30/09/2001 - AVHRR/3 on NOAA-15: 01/01/1999 to 31/07/2000 - AVHRR/3 on NOAA-16: 01/10/2001 to 30/06/2005 - AVHRR/3 on NOAA-17: 01/07/2002 to 30/06/2005 Very High Resolution Radiometer (VHRR): - VHRR data on INSAT-1 series (INSAT-1A to 1D): 01/04/1988 to 31/03/1989 GOES-Imager: - GOES-Imager data on GOES-10: 01/08/1998 to 30/06/2005 - GOES-Imager data on GOES-12: 01/04/2003 to 30/06/2005 Multispectral Imaging Radiometer (MIR): - MIR data on METEOSAT-2: 01/07/1983 to 11/08/1988 - MIR data on METEOSAT-3: 11/08/1988 to 25/01/1991 - MIR data on METEOSAT-4 : 19/06/1989 to 30/06/1991 METEOSAT Visible and IR Imager (MVIRI): - MVIRI data on METEOSAT-5: 01/02/1994 to 30/06/2005 - MVIRI data on METEOSAT-6: 01/03/1997 to 31/05/1998 Visible and Infrared Spin-Scan Radiometer (VISSR) data: - VISSR data on GMS-1: 21/01/1984 to 30/06/1984 - VISSR data on GMS-2: 01/07/1983 to 27/091984 - VISSR data on GMS-3: 27/09/1984 to 04/12/1989 - VISSR data on GMS-4: 04/12/1989 to 30/06/1991 - VISSR data on GMS-5: 01/06/1995 to 30/04/2003 - VISSR data on GOES-5: 01/07/1983 to 30/07/1984 - VISSR data on GOES-6: 01/07/1983 to 21/01/1989 - VISSR data on GOES-7: 26/04/1987 to 30/06/1991 - VISSR data on GOES-8: 01/05/1995 to 31/03/2003 - VISSR data on GOES-9: 01/01/1996 to 30/06/2005 For further information about the satellites and their instruments please see the linked documentation pages.