1205818e121bd8c12a6029f9cbd11a18 English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 series series NCAS British Atmospheric Data Centre (NCAS BADC) +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk pointOfContact 2026-05-06T02:29:33 UK GEMINI 2.3 WGS 84 Met Office Globally gridded radiosonde temperature anomalies HadAT Datasets (1958-2012) 2005-12-10T03:04:09 publication 2005-12-10T03:04:09 creation https://catalogue.ceda.ac.uk/uuid/1205818e121bd8c12a6029f9cbd11a18 1205818e121bd8c12a6029f9cbd11a18 NCAS British Atmospheric Data Centre (NCAS BADC) The HadAT data are global radiosonde gridded temperature anomalies at standard levels (850, 700, 500, 300, 200, 150, 100, 50, and 30hPa) in the troposphere and in the lower stratosphere from 1958 to December 2012. This monthly timeseries are available on a 10 degree longitude by 5 degree latitude basis. This dataset supersedes the HadRT dataset. All values are anomalies relative to the monthly 1966-95 climatology. The gridded product is derived from 676 individual radiosonde stations with long-term records. Because of the criteria of data longevity the resulting dataset is limited to land areas and primarily Northern Hemisphere locations. Radiosondes are single launch instruments and there have been many changes in instruments and observing practices with time. HadAT has used a neighbour-based approach to attempt to adjust for these effects and produce a homogeneous product suitable for climate applications. Zonal averages were created by averaging all available gridbox values in each 5 degree latitude band. Large scale mean timeseries for the globe and the tropics (defined here as 20N to 20S) are simply cos(lat) weighted zonal mean field values. This reduces the spatial sampling bias towards Northern Hemisphere mid-latitudes. Other plausible large-scale averaging techniques would impact the timeseries values calculated. Cautionary note from the Met Office Hadley Centre It is important to note that significant uncertainty exists in radiosonde datasets reflecting the large number of choices available to researchers in their construction and the many heterogeneities in the data. To this end we strongly recommend that users consider, in addition to HadAT, the use of one or more of the following products to ensure their research results are robust. Currently, other radiosonde products of climate quality available from other centres for bona fide research purposes are: - Radiosonde Atmospheric Temperature Products for Assessing Climate (RATPAC) - RAdiosonde OBservation COrrection using REanalyses and Radiosonde Innovation Composite Homogenization ) - IUK (Iterative Universal Kriging) Radiosonde Analysis Project Also see a comparison with Microwave Sounding Unit (MSU) data by Remote Sensing Systems (see links under Docs tab below) . Hadley Centre for Climate Prediction and Research (MOHC) author Met Office Exeter unknown author Tett, Simon F.B. Unavailable author Unavailable author Thorne, P.W. Unavailable author Unavailable author Parker, Douglas E. Unavailable author Unavailable author NCAS British Atmospheric Data Centre (NCAS BADC) custodian +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk custodian NCAS British Atmospheric Data Centre (NCAS BADC) distributor +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk distributor NCAS British Atmospheric Data Centre (NCAS BADC) point_of_contact +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk pointofContact NCAS British Atmospheric Data Centre (NCAS BADC) publisher +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk publisher unknown series Met Office HADAT radiosonde temperature anomalies Hadley atmospheric conditions theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication otherRestrictions Access to data within this collection is restricted. Please see the individual datasets within this collection for further access details. otherRestrictions Under the following licence https://artefacts.ceda.ac.uk/licences/specific_licences/ukmo_agreement.pdf, appropriate use of these data may fall under academic use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. grid English climatologyMeteorologyAtmosphere -180.0 180.0 -90.0 90.0 1958-01-01T00:00:00 2012-12-31T00:00:00 Contact data centre for format details. NCAS British Atmospheric Data Centre (NCAS BADC) Data Center Contact +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk distributor https://catalogue.ceda.ac.uk/uuid/1205818e121bd8c12a6029f9cbd11a18 CEDA Data Catalogue Page Detail and access information for the resource information https://artefacts.ceda.ac.uk/badc_datadocs/hadat/audit.html BADC Doc: Summary of HadAT development No further details. information https://artefacts.ceda.ac.uk/badc_datadocs/hadat/uncertainty.html BADC Doc: HadAT Uncertainty estimates No further details. information http://data.ceda.ac.uk/badc/ukmo-hadat/doc/jrl0301.pdf Lanzante, J.R. et al., 2003 No further details. information http://data.ceda.ac.uk/badc/ukmo-hadat/doc/jrl0302.pdf Lanzante, J.R. et al., 2003 No further details. information http://dx.doi.org/10.1029/2004JD005753 Thorne P.W. et al., 2005; Revisiting radiosonde upper air temperatures from 1958 to 2002, JGR-Atmospheres, D18, 110 No further details. information http://www.univie.ac.at/theoret-met/research/raobcore/ RAdiosonde OBservation COrrection using REanalyses and Radiosonde Innovation Composite Homogenization No further details. information http://data.ceda.ac.uk/badc/ukmo-hadat/images/ HadAT Typically used Diagrams No further details. information http://data.ceda.ac.uk/badc/ukmo-hadat/doc/update_report.pdf Coleman, H. and Thorne, P.W., 2005 No further details. information https://www.ncdc.noaa.gov/data-access/weather-balloon/radiosonde-atmospheric-temperature-products-accessing-climate Radiosonde Atmospheric Temperature Products for Assessing Climate (RATPAC) No further details. information http://web.science.unsw.edu.au/~stevensherwood/radproj/index.html IUK (Iterative Universal Kriging) Radiosonde Analysis Project No further details. information http://www.remss.com/measurements/upper-air-temperature/validation A comparison with Microwave Sounding Unit (MSU) data No further details. information series Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Please see data lineage statements for each dataset within this collection for data lineage details.