Hadley Centre subsurface temperature and salinity objective analyses (version 4.2.2)

Quality controlled subsurface temperature and salinity reanalysis of observations

EN4: quality controlled subsurface ocean temperature and salinity objective analyses

Analyses with two different sets of bias corrections applied are available: 1) Gouretski and Reseghetti (2010) corrections [g10] and 2) Levitus et al (2009) corrections [l09]. In both cases the corrections used were updates of the original corrections published in the papers. The following pages give more information about bias corrections for profile data: http://www.nodc.noaa.gov/OC5/XBT_BIAS/xbt_bias.html and http://www.nodc.noaa.gov/OC5/mbt-bias/. Please get in touch with the Hadley Centre if you would like to use data without bias corrections applied or if you would like data with different corrections.

Description of the dataset
The EN4 dataset consists of two products: Observed subsurface ocean temperature and salinity profiles with data quality information, and objective analyses formed from the profile data with uncertainty estimates. Only the objective analyses are provided here. Data are available from 1900 to the present.

Please read '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, 118, 6704-6716, doi:10.1002/2013JC009067' for details of how the dataset was constructed.

Feedback and requests for new features
If you have any comments or questions about the data, please get in touch at http://www.metoffice.gov.uk/hadobs/en4/contact.html. New versions of the dataset will be released as required to incorporate new features and new historical data. If you have suggestions for changes to the dataset we would love to hear about them.

Citing the data
When using the data set in a paper, please quote the version number (for example EN4.2.2), 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, 118, 6704-6716, doi:10.1002/2013JC009067
Where appropriate please also acknowledge the data sources used to create EN4.

Variables
temperature, salinity, temperature_uncertainty, salinity_uncertainty, temperature_observation_weights, salinity_observation_weights
Zonal Global by 1 deg
Meridional Global by 1 deg
Vertical 5.02159, 15.07854, 25.16046, 35.27829, 45.44776, 55.69149, 66.04198, 76.54591, 87.27029, 98.31118, 109.8062, 121.9519, 135.0285, 149.4337, 165.7285, 184.6975, 207.4254, 235.3862, 270.5341, 315.3741, 372.9655, 446.8009, 540.5022, 657.3229, 799.5496, 967.9958, 1161.806, 1378.661, 1615.291, 1868.071, 2133.517, 2408.583, 2690.78, 2978.166, 3269.278, 3563.041, 3858.676, 4155.628, 4453.502, 4752.021, 5050.99, 5350.272  
Temporal Jan 1900 to May 2022 by 1 month(s)
Static? no
Volume 60 MB per month
Server public:
Source http://www.metoffice.gov.uk/hadobs/en4/index.html
Acquired May 17, 2017 (Updated Aug 2022)
APDRC contact
Supplements http://www.metoffice.gov.uk/hadobs/en4/FAQ.html