HadISDH land: gridded global monthly land surface humidity data version 4.2.0.2019f

This is the 4.2.0.2019f version of the HadISDH (Integrated Surface Database Humidity) land data. These data are provided by the Met Office Hadley Centre. This version spans 1/1/1973 to 31/12/2019.

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). Data are provided in either NetCDF or ASCII format.

This version extends the 4.1.0.2018f version to the end of 2019 and constitutes a minor update to HadISDH due to changing some of the code base from IDL to Python 3 and detecting and fixing various bugs in the process. These have led to small changes in regional and global average values and coverage. All other processing steps for HadISDH remain identical. Users are advised to read the update document in the Docs section for full details.

As in previous years, the annual scrape of NOAA’s Integrated Surface Dataset for HadISD.3.1.0.2019f, which is the basis of HadISDH.land, has pulled through some historical changes to stations. This, and the additional year of data, results in small changes to station selection. There has been an issue with data for April 2015 whereby it is missing for most of the globe. This will hopefully be resolved by next year’s update. The homogeneity adjustments differ slightly due to sensitivity to the addition and loss of stations, historical changes to stations previously included and the additional 12 months of data.

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., 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.

Date (Publication): 2020-06-29T11:40:00

Date (Creation): 2020-06-29T11:40:00

Citation identifier: https://catalogue.ceda.ac.uk/uuid/3e9f387293294f3b8a850524fcfc0c9c

Citation identifier: Centre for Environmental Data Analysis (CEDA) / 3e9f387293294f3b8a850524fcfc0c9c

Citation identifier: doi / 10.5285/3e9f387293294f3b8a850524fcfc0c9c

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Unavailable	Willett, Kate M.	Unavailable	Author
Unavailable	Dunn, Robert J. H.	Unavailable	Author
Unavailable	Thorne, Peter W.	Unavailable	Author
Unavailable	Bell, Stephanie	Unavailable	Author
Unavailable	de Podesta, Michael	Unavailable	Author
Unavailable	Parker, David E.	Unavailable	Author
Unavailable	Jones, Philip D.	Unavailable	Author
Unavailable	Williams Jr., Claude N.	Unavailable	Author
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Custodian
Met Office Hadley Centre (MOHC)		enquiries@metoffice.gov.uk	Owner
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Distributor
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	pointofContact
Unavailable	Willett, Kate M.	Unavailable	pointofContact
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Publisher

Maintenance and update frequency: Not planned

Update scope: Dataset

Keywords

HadISDH
humidity
surface
land
gridded
station
specific humidity
temperature
dew point temperature
wet bulb temperature
dew point temperature
vapour pressure
in-situ

GEMET - INSPIRE themes, version 1.0

atmospheric conditions

Access constraints: Other restrictions

Other constraints: Public data: access to these data is available to both registered and non-registered users.

Use constraints: Other restrictions

Other constraints: Under the following licence http://www.nationalarchives.gov.uk/doc/non-commercial-government-licence/version/2/, appropriate use of these data may fall under personal, academic and policy 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.

Spatial representation type: Grid

Language: English

Topic category

Climatology, meteorology, atmosphere

Begin date: 1973-01-01T00:00:00

End date: 2019-12-31T23:59:59

Unique resource identifier: WGS 84

Distribution format

Name	Version
These data are provided in NetCDF and ASCII formats, descriptors of the file formats are included in Docs.

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://catalogue.ceda.ac.uk/uuid/3e9f387293294f3b8a850524fcfc0c9c	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/badc/ukmo-hadobs/data/insitu/MOHC/HadOBS/HadISDH/mon/HadISDHTable/r1/v4-2-0-2019f/	DOWNLOAD

OnLine resource

Protocol	Linkage	Name
	http://journals.ametsoc.org/doi/abs/10.1175/2011BAMS3015.1	Integrated surface database reference paper

OnLine resource

Protocol	Linkage	Name
	http://www.clim-past.net/9/657/2013/cp-9-657-2013.html	HadISDH 2013 reference paper

OnLine resource

Protocol	Linkage	Name
	http://www.clim-past.net/10/1983/2014/cp-10-1983-2014.html	HadISDH 2014 reference paper

OnLine resource

Protocol	Linkage	Name
	http://www.geosci-instrum-method-data-syst.net/5/473/2016/gi-5-473-2016.html	Dunn, R. J. H., Willett, K. M., Parker, D. E., and Mitchell, L.: Expanding HadISD: quality-controlled, sub-daily station data from 1931, Geosci. Instrum. Method. Data Syst., 5, 473-491, doi:10.5194/gi-5-473-2016, 2016.

OnLine resource

Protocol	Linkage	Name
	http://www.metoffice.gov.uk/hadobs/hadisdh/	HadISDH Homepage

OnLine resource

Protocol	Linkage	Name
	https://twitter.com/metofficeHadOBS	Met Office HadOBS twitter feed

OnLine resource

Protocol	Linkage	Name
	http://hadisdh.blogspot.co.uk/	HadISDH blog

OnLine resource

Protocol	Linkage	Name
	https://zenodo.org/record/7356965/files/HadISDH.2.0.0Process.png	HadISDH process diagram

OnLine resource

Protocol	Linkage	Name
	https://zenodo.org/record/7357311	HadISDH Data Format v2

OnLine resource

Protocol	Linkage	Name
	https://zenodo.org/record/7357313	HadISDH update doc for v4.2.0.2019f

Hierarchy level: Dataset

Conformance result

Title: 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

Date (Publication): 2010-12-08

Statement: HadISDH-land is a global land surface (~2 m) humidity dataset and is produced by the Met Office Hadley Centre in collaboration with Maynooth University, NOAA NCEI, NPL and CRU. It is based on the quality controlled sub-daily HadISD from the Met Office Hadley Centre which is in turn based on the ISD dataset from NOAA's NCEI. It is passed to CEDA for archiving and distribution.

Metadata

File identifier: 3e9f387293294f3b8a850524fcfc0c9c XML

Metadata language: English

Character set: UTF8

Parent identifier: HadISDH: global surface humidity data
251474c7b09449d8b9e7aeaf1461858f

Hierarchy level: Dataset

Date stamp: 2026-03-01T03:19:32

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Point of contact

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