Dataset
HadSST2 - 5x5 deg Monthly Global fields of SST anomalies (1850-2013)
Abstract
The Met Office Hadley Centre's sea surface temperature data set, HadSST2, replaces the Met Office Historical Sea Surface Temperature dataset (MOHSST6) and is a monthly global field of SST (Sea Surface Temperature) on a 5 deg latitude by 5 deg longitude grid from 1850 to August 2013. The data are neither interpolated nor variance adjusted.
The SST data are taken from the International Comprehensive Ocean-Atmosphere Data Set, ICOADS, from 1850 to 1997 and from the NCEP-GTS from 1998 to the present. HadSST2 is produced by taking in-situ measurements of SST from ships and buoys, rejecting measurements which which fail quality checks, converting the measurements to anomalies by subtracting climatological values from the measurements, and calculating a robust average of the resulting anomalies on a 5° by 5° degree monthly grid. After gridding the anomalies, bias corrections are applied to remove spurious trends caused by changes in SST measuring practices before 1942. The uncertainties due to under-sampling have been calculated for the gridded monthly data as have the uncertainties on the bias corrections.
This dataset include:
- SST anomaly data (HadSST2_SST_1850on.txt.gz)
- 1961-1990 Climatology (HadSST2_climatology_5x5_1961_1990.txt)
- numbers of observations used to calculate the average (HadSST2_nobs_1850on.txt.gz)
- Estimates on the measurement and sampling errors on the SST data (HadSST2_m_and_s_errors_1850on.txt.gz)
- bias-adjusted data using bias adjustments which represent the 97.5 percent and 2.5 percent confidence levels of the estimated errors on the adjustments (HadSST2_97.5_pct_bias_1850on.txt.gz and HadSST2_2.5_pct_bias_1850on.txt.gz).
- Files showing the correction applied to the data e.g.:
HadSST2_bucket_correction_median.txt.gz - the corrections applied to the data 1850-1941
HadSST2_bucket_correction_2.5pc.txt.gz - the lower bound of the 95% confidence range of the uncertainties 1850-1941
HadSST2_bucket_correction_97.5pc.txt.gz - the upper bound of the 95% confidence range of the uncertainties 1850-1941
A 1 degree version of HadSST2 is also available.
Data were provided by the Met Office Hadley Centre. Dataset was produced by the Hadley Centre in collaboration with ICOADS.
Details
| Previous Info: |
No news update for this record
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|---|---|
| Previously used record identifiers: |
http://badc.nerc.ac.uk/view/badc.nerc.ac.uk__ATOM__dep_11704356953813716
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| Access rules: |
Restricted data: please submit an application using the REQUEST ACCESS link for access.
Use of these data is covered by the following licence: http://licences.ceda.ac.uk/image/data_access_condition/ukmo_agreement.pdf. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
HadSST2 was acquired in 2008 by the BADC from the Met Office Hadley Centre and has been routinely updated as is until 2013 at the BADC from the Hadley Centre. |
| Data Quality: |
Data quality controlled by the Met Office.
Estimates on the measurement and sampling errors on the SST data are available in the archive.
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| File Format: |
ASCII and NetCDF
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Related Documents
| Rayner N.A. et al, 2006 |
| HadSST2 File Format Explained |
| HadSST2 Diagnostics |
Process overview
| Title | HadSST2 sea surface temperature anomalies data processing deployed on Met Office Hadley Centre Computers |
| Abstract | This computation involved: HadSST2 sea surface temperature anomalies data processing deployed on Met Office Hadley Centre Computers. HadSST2 is produced by taking in-situ measurements of SST from ships and buoys, rejecting measurements which fail quality checkes, converting the measurements to anomalies by substracting climatological values from the measurements, and calculating a robust average of the resulting anomalies on a 5 deg by 5 deg monthly grid. The Met Office Hadley Centre is the UK's official centre for climate change research. Partly funded by Defra (the Department for Environment, Food and Rural Affairs), they provide in-depth information to, and advise, the Government on climate change issues. Hadley Centre aims: 1. understand physical, chemical and biological processes within the climate system and develop computer models of the climate which represent them; The Hadley Centre undertakes studies of the global climate using similar, though more extensive, models of the atmospheres, as are used for the prediction of weather conditions. |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
- units: degrees C
- long_name: 2.5 percent bias bound, equivalent to 2 standard errors
- var_id: low_bias
- units: degrees C
- long_name: 97.5 percent bias bound, equivalent to 2 standard errors
- var_id: high_bias
- units: degrees_north
- var_id: lat
- long_name: Latitude
- units: degrees_east
- var_id: lon
- long_name: Longitude
- units: degrees C
- long_name: Monthly 5degree resolution SST anomalies wrt 1961-90 climatology
- var_id: sst
- long_name: Ocean Temperature
- gcmd_url: http://vocab.ndg.nerc.ac.uk/term/P131/4/GTER0079
- gcmd_keyword: Ocean Temperature
- names: Ocean Temperature, http://vocab.ndg.nerc.ac.uk/term/P131/4/GTER0079
- units: degrees C
- long_name: SST monthly 5degreex5degree climatology 1961-1990
- var_id: climatology
- var_id: time
- long_name: Time
- units: degrees C
- long_name: measurement and sampling error, 1 standard error
- var_id: ms_error
Co-ordinate Variables
Temporal Range
1850-01-01T00:00:00
2013-08-30T23:00:00
Geographic Extent
87.5000° |
||
-177.5000° |
177.5000° |
|
-87.5000° |