HadISDH marine: gridded global monthly ocean surface humidity data version 1.1.0.2020f

This is the HadISDH marine 1.1.0.2020f version of the Met Office Hadley Centre Integrated Surface Dataset of Humidity (HadISDH). HadISDH-marine s a near-global gridded monthly mean marine surface humidity climate monitoring product. It is created from in situ observations of air temperature and dew point temperature from ships. The observations have been quality controlled and bias-adjusted. Uncertainty estimates for observation issues and gridbox sampling are provided (see data quality statement section below). The data are provided by the Met Office Hadley Centre and 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 and constitutes a minor update to HadISDH due to change in method for calculating gridbox monthly means. All other processing steps for HadISDH remain identical. Users are advised to read the update document 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.

Date (Publication): 2021-04-28T14:58:12

Date (Creation): 2021-04-28T14:58:12

Citation identifier: https://catalogue.ceda.ac.uk/uuid/c928ef392244426b9473af92a16b0daf

Citation identifier: Centre for Environmental Data Analysis (CEDA) / c928ef392244426b9473af92a16b0daf

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	Kennedy, John J.	Unavailable	Author
Unavailable	Berry, David I.	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
NERC EDS Centre for Environmental Data Analysis		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
marine
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/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.

Spatial representation type: Grid

Language: English

Topic category

Climatology, meteorology, atmosphere

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

End date: 2020-12-31T23:59:59

Unique resource identifier: WGS 84

Distribution format

Name	Version
Data are NetCDF formatted.

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/c928ef392244426b9473af92a16b0daf	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/badc/ukmo-hadobs/data/insitu/MOHC/HadOBS/HadISDH-marine/mon/HadISDHTable/r1/v1-1-0-2020f/	DOWNLOAD

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
	https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.4775	ICOADS.3.0.0 reference paper

OnLine resource

Protocol	Linkage	Name
	https://zenodo.org/record/7357309	HadISDH.marine process diagram

OnLine resource

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

OnLine resource

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

OnLine resource

Protocol	Linkage	Name
	https://dap.ceda.ac.uk/badc/ukmo-hadobs/docs/HadISDH/HadISDH.marine.1.1.0.2020f_update.pdf	HadISDH update document for v1.1.0.2020f

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-marine is a global ocean surface (~10 m) humidity dataset and is produced by the Met Office Hadley Centre in collaboration with NOC. It is based on the sub-daily ship observations from ICOADS. It is passed to CEDA for archiving and distribution.

Metadata

File identifier: c928ef392244426b9473af92a16b0daf XML

Metadata language: English

Character set: UTF8

Parent identifier: HadISDH: global surface humidity data
251474c7b09449d8b9e7aeaf1461858f

Hierarchy level: Dataset

Date stamp: 2026-02-08T03:23:03

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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