8e90b16ddd2a484897ab9737c46d6204 English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 251474c7b09449d8b9e7aeaf1461858f dataset Centre for Environmental Data Analysis (CEDA) 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk pointOfContact 2026-05-06T02:23:14 UK GEMINI 2.3 WGS 84 HadISDH blend: gridded global monthly land and ocean surface humidity data version 1.1.1.2020f 2021-04-28T15:01:53 publication 2021-04-28T15:01:53 creation https://catalogue.ceda.ac.uk/uuid/8e90b16ddd2a484897ab9737c46d6204 8e90b16ddd2a484897ab9737c46d6204 Centre for Environmental Data Analysis (CEDA) This is the HadISDH blend 1.1.1.2020f version of the Met Office Hadley Centre Integrated Surface Dataset of Humidity (HadISDH). HadISDH-blend is a near-global gridded monthly mean surface humidity climate monitoring product. It is created from in situ observations of air temperature and dew point temperature from ships and weather stations. The observations have been quality controlled and homogenised / bias adjusted. Uncertainty estimates for observation issues and gridbox sampling are provided (see data quality statement section below). These data are provided by the Met Office Hadley Centre. This version spans 1/1/1973 to 31/12/2020. The data are monthly gridded (5 degree by 5 degree) fields. Products are available for temperature and six humidity variables: specific humidity (q), relative humidity (RH), dew point temperature (Td), wet bulb temperature (Tw), vapour pressure (e), dew point depression (DPD). This version extends the 1.0.0.2019f version to the end of 2020. It combines HadISDH.land.4.3.1.2020f and HadISDH.marine.1.1.0.2020f and therefore their respective update notes. Users are advised to read the update documents in the Docs section for full details. To keep informed about updates, news and announcements follow the HadOBS team on twitter @metofficeHadOBS. For more detailed information e.g bug fixes, routine updates and other exploratory analysis, see the HadISDH blog: http://hadisdh.blogspot.co.uk/ References: When using the dataset in a paper please cite the following papers (see Docs for link to the publications) and this dataset (using the "citable as" reference): Willett, K. M., Dunn, R. J. H., Kennedy, J. J. and Berry, D. I., 2020: Development of the HadISDH marine humidity climate monitoring dataset. Earth System Sciences Data, 12, 2853-2880, https://doi.org/10.5194/essd-12-2853-2020 Freeman, E., Woodruff, S. D., Worley, S. J., Lubker, S. J., Kent, E. C., Angel, W. E., Berry, D. I., Brohan, P., Eastman, R., Gates, L., Gloeden, W., Ji, Z., Lawrimore, J., Rayner, N. A., Rosenhagen, G. and Smith, S. R., ICOADS Release 3.0: A major update to the historical marine climate record. International Journal of Climatology. doi:10.1002/joc.4775. Willett, K. M., Dunn, R. J. H., Thorne, P. W., Bell, S., de Podesta, M., Parker, D. E., Jones, P. D., and Williams Jr., C. N.: HadISDH land surface multi-variable humidity and temperature record for climate monitoring, Clim. Past, 10, 1983-2006, doi:10.5194/cp-10-1983-2014, 2014. Dunn, R. J. H., et al. 2016: Expanding HadISD: quality-controlled, sub-daily station data from 1931, Geoscientific Instrumentation, Methods and Data Systems, 5, 473-491. Smith, A., N. Lott, and R. Vose, 2011: The Integrated Surface Database: Recent Developments and Partnerships. Bulletin of the American Meteorological Society, 92, 704-708, doi:10.1175/2011BAMS3015.1 We strongly recommend that you read these papers before making use of the data, more detail on the dataset can be found in an earlier publication: Willett, K. M., Williams Jr., C. N., Dunn, R. J. H., Thorne, P. W., Bell, S., de Podesta, M., Jones, P. D., and Parker D. E., 2013: HadISDH: An updated land surface specific humidity product for climate monitoring. Climate of the Past, 9, 657-677, doi:10.5194/cp-9-657-2013. Willett, Kate M. Unavailable author Unavailable author Dunn, Robert J. H. Unavailable author Unavailable author Kennedy, John J. Unavailable author Unavailable author Berry, David I. Unavailable author Unavailable author Thorne, Peter W. Unavailable author Unavailable author Bell, Stephanie Unavailable author Unavailable author de Podesta, Michael Unavailable author Unavailable author Parker, David E. Unavailable author Unavailable author Jones, Philip D. Unavailable author Unavailable author Williams Jr., Claude N. Unavailable author Unavailable author Centre for Environmental Data Analysis (CEDA) custodian 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk custodian Met Office Hadley Centre (MOHC) data_owner FitzRoy Road Exeter EX1 3PB UK enquiries@metoffice.gov.uk owner Centre for Environmental Data Analysis (CEDA) distributor 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor NERC EDS Centre for Environmental Data Analysis point_of_contact 01235446432 RAL Space STFC Rutherford Appleton Laboratory, Harwell Campus Didcot OX11 0QX United Kingdom support@ceda.ac.uk pointofContact Willett, Kate M. Unavailable point_of_contact Unavailable pointofContact Centre for Environmental Data Analysis (CEDA) publisher 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk publisher notPlanned dataset HadISDH blend humidity surface marine gridded station specific humidity temperature dew point temperature wet bulb temperature dew point temperature vapour pressure in-situ atmospheric conditions theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication otherRestrictions Public data: access to these data is available to both registered and non-registered users. otherRestrictions Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any 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 1973-01-01T00:00:00 2020-12-31T23:59:59 The data are NetCDF formatted. Centre for Environmental Data Analysis (CEDA) Data Center Contact 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor https://catalogue.ceda.ac.uk/uuid/8e90b16ddd2a484897ab9737c46d6204 CEDA Data Catalogue Page Detail and access information for the resource information http://data.ceda.ac.uk/badc/ukmo-hadobs/data/insitu/MOHC/HadOBS/HadISDH-blend/mon/HadISDHTable/r1/v1-1-1-2020f/ DOWNLOAD Download Data download https://www.clim-past.net/9/657/2013/cp-9-657-2013.html HadISDH.land 2013 paper No further details. information https://www.geosci-instrum-method-data-syst.net/5/473/2016/ HadISD reference paper No further details. information https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.4775 ICOADS.3.0.0 reference paper No further details. information https://journals.ametsoc.org/doi/abs/10.1175/2011BAMS3015.1 ISD reference paper No further details. information https://twitter.com/metofficeHadOBS Met Office HadOBS twitter feed No further details. information https://www.clim-past.net/10/1983/2014/cp-10-1983-2014.html HadISDH.land 2014 reference paper No further details. information http://www.metoffice.gov.uk/hadobs/hadisdh/ HadISDH Homepage No further details. information http://hadisdh.blogspot.co.uk/ HadISDH blog No further details. information https://dap.ceda.ac.uk/badc/ukmo-hadobs/docs/HadISDH/HadISDH.land.4.3.1.2020f_update.pdf HadISDH land update doc for version 4.3.1.2020f No further details. information https://dap.ceda.ac.uk/badc/ukmo-hadobs/docs/HadISDH/HadISDH.marine.1.1.0.2020f_update.pdf HadISDH marine update doc for version 1.1.0.2020f No further details. information https://zenodo.org/record/7357311 HadISDH Data Format v2 No further details. information https://zenodo.org/record/7357309 HadISDH.marine process diagram No further details. information dataset 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 HadISDH.blend is a global land (~2 m) and ocean (~10 m) surface humidity dataset and is produced by the Met Office Hadley Centre in collaboration with CRU, Maynooth University, NPL, NOAA-NCEI and NOC. It is based on the sub-daily station observations from HadISD (originally from ISD) and ship observations from ICOADS. It is passed to the Centre for Environmental Data Analysis (CEDA) for archiving and distribution. Gridboxes containing both land and marine data are combined using a weighted average with a minimum and maximum weighting of 25% and 75% respectively.