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HadAT1 - Met Office Globally gridded radiosonde temperature anomalies version 1 (1958 to 2002)

Update Frequency: Not Planned
Latest Data Update: 2005-09-08
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2013-04-16
Download Stats: last 12 months
Dataset Size: 10 Files | 20MB


The HadAT1 data are global radiosonde gridded temperature anomalies at standard levels (850, 700, 500, 300, 200, 150, 100, 50, and 30hPa) in the troposphere and in the lower stratosphere from 1958 to December 2002. This monthly timeseries are available on a 10 degree longitude by 5 degree latitude basis. This dataset supersedes the HadRT dataset. All values are anomalies relative to the monthly 1966-95 climatology.

Citable as:  Hadley Centre for Climate Prediction and Research (2013): HadAT1 - Met Office Globally gridded radiosonde temperature anomalies version 1 (1958 to 2002). NCAS British Atmospheric Data Centre, date of citation.
Abbreviation: Hadley-HADAT1
Keywords: Met Office, HADAT, radiosonde, temperature anomalies, Hadley


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
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: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data files acquired as is from the Met Office Hadley centre, are stored at the BADC.

Data Quality:
Data quality controlled by the Met Office (as per dataset documentation provided).
File Format:
The data are available in ASCII and NetCDF format

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Instrument/Platform pairings

Radiosonde Deployed on: HadAT radiosonde network

Computation Element: 1

Title HadAT1 Computation
Abstract The HadAT1 data are produced by performing quality control and a nearest neighbour analysis on the near raw radiosonde network data of HadAT0. See the documentation for full details.
Input Description None
Output Description None
Software Reference None
Output Description


  • long_name: Temperature Anomalies
  • gcmd_url:
  • gcmd_keyword: Temperature Anomalies
  • names:, Temperature Anomalies
  • units: K
  • long_name: adjustment factors
  • var_id: adjustments
  • names: adjustment factors
  • units: K
  • long_name: global mean anomaly
  • var_id: global_mean
  • names: global mean anomaly
  • units: degrees_north
  • long_name: latitude
  • var_id: lat
  • names: latitude
  • units: degrees_east
  • long_name: longitude
  • var_id: lon
  • names: longitude
  • units: hPa
  • var_id: pressure
  • long_name: pressure level
  • names: pressure level
  • units: K
  • long_name: seasonal anomalies
  • var_id: anomalies
  • names: seasonal anomalies
  • units: wmo_station_id
  • long_name: station
  • var_id: station
  • names: station
  • units: degrees_north
  • var_id: lat
  • long_name: station latitude
  • names: station latitude
  • units: degrees_east
  • var_id: lon
  • long_name: station longitude
  • names: station longitude
  • long_name: time
  • var_id: time
  • names: time
  • units: K
  • long_name: tropical mean anomaly
  • var_id: tropical
  • names: tropical mean anomaly
  • units: K
  • long_name: zonal mean anomaly
  • var_id: zonal
  • names: zonal mean anomaly

Co-ordinate Variables

Temporal Range
Start time:
End time:
Geographic Extent