> Home > EN4 >

EN4: terms and conditions

EN4 is subject to Crown copyright protection and is provided under a Non-Commercial Government Licence. Further information about the licence can be obtained from here.

When publishing work using the data, please quote the version number (for example EN.4.2.2), the bias corrections used (for example .g10. and .c14.), the date the data were downloaded and cite the following:

Good, S. A., M. J. Martin and N. A. Rayner, 2013. EN4: quality controlled ocean temperature and salinity profiles and monthly objective analyses with uncertainty estimates, Journal of Geophysical Research: Oceans, doi:10.1002/2013JC009067.

Users should also include one of the following:

For use in the UK: "EN.4.2.2 data were obtained from https://www.metoffice.gov.uk/hadobs/en4/ and are © Crown Copyright, Met Office, [year of first publication], provided under a Non-Commercial Government Licence http://www.nationalarchives.gov.uk/doc/non-commercial-government-licence/version/2/."
For use outside the UK: "EN.4.2.2 data were obtained from https://www.metoffice.gov.uk/hadobs/en4/ and are © British Crown Copyright, Met Office, [year of first publication], provided under a Non-Commercial Government Licence http://www.nationalarchives.gov.uk/doc/non-commercial-government-licence/version/2/."

The source should also be quoted in the acknowledgements section as www.metoffice.gov.uk/hadobs. Please also take care to acknowledge the data sources used to construct EN4 and to reference the bias correction paper(s) for the bias corrections you have used.

Bias Correction References

Viktor Gouretski and Franco Reseghetti, 2010: On depth and temperature biases in bathythermograph data: development of a new correction scheme based on analysis of a global ocean database. Deep-Sea Research I, 57, 6. doi: http://dx.doi.org/10.1016/j.dsr.2010.03.011

S. Levitus et al., 2009: Global ocean heat content 1955-2008 in light of recently revealed instrumentation problems. Geophysical Research Letters, 36, L07608. doi:http://dx.doi.org/10.1029/2008GL037155

Cowley et al, 2013: Biases in Expendable Bathythermograph Data: A New View Based on Historical Side-by-Side Comparisons. Journal of Atmospheric and Oceanic Technology, 30, 6. doi: https://doi.org/10.1175/JTECH-D-12-00127.1

Cheng et al, 2014: Time, Probe Type, and Temperature Variable Bias Corrections to Historical Expendable Bathythermograph Observations. Journal of Atmospheric and Oceanic Technology, 31, 8. doi: https://doi.org/10.1175/JTECH-D-13-00197.1

Viktor Gouretski and Lijing Cheng, 2020: Correction for Systematic Errors in the Global Dataset of Temperature Profiles from Mechanical Bathythermographs. Journal of Atmospheric Technology and Oceanic Research, 37, 5. doi: https://doi.org/10.1175/JTECH-D-19-0205.1

Commercial and media enquiries

You can access the Met Office Customer Centre, any time of the day or night by phone, fax or e-mail. Trained staff will help you find the information or products that are right for you.
Contact the Met Office Customer Centre