HadGEM1 Model Integrations

Introduction

The HadGEM1 model is the Met Office Hadley centre global environment model. This version of the model includes a detailed representation of the atmosphere, land surface, ocean, and cryosphere. This dataset includes a control run and a number of climate change experiments. Typically, a control run is made to provide a "baseline" for comparison in climate change experiments. The control run uses constant values for the radiative forcing due to green house gases and anthropogenic aerosols appropriate to preindustrial conditions. The climate change experiments themselves are model runs where a scenario representing particular change in the greenhouse gas concentration over time is included. These data were extracted as part of the Defra LINK project at the BADC

Restricted data

The BADC archive all of the variables output by the HadGEM1 model. Some of the variables are used in active research in the Met Office Hadley centre. The Met Office would like to collaborate in any research using the HadGEM1 integrations. To access the HadGEM1 integrations you will need to agree to the NERC-MO conditions of use. To apply, please follow this link.
Please note that access to data is provided on a per person per project basis (i.e. all members on a same project who will be using the data must individually apply for access to the data).

The experiments currently available are listed at http://badc.nerc.ac.uk/data/hadgem1/latest_volumes.html

More experiments will become available in the coming months.

Data format and software

The HadGEM1 integrations data is contained in 32-bit pp files.

Software is available to list, manipulate, and visualise the HadGEM1 data. swapbytes can be used to byte swap pp files from the COAPEC dataset if neccessary. xconv provides an easy to use point and click interface to the data. convsh provides a subset of the functionality of xconv, but in a scriptable form, so it can be used to automate some common data processing tasks. Jeff Cole at CGAM Reading, who developed both xconv and convsh, provides some example uses of convsh.

Note: that a user has reported a problem with the sea-surface elevation data. Field608 is labelled in cm but gives elevations in the order of 100-1000m. Anne Pardaens of the Met Office has told me there is a scale factor missing, of 1/9.806e4 (to give it in m).

Documentation

A basic set of web pages describing the output variables available from the HadGEM1 control run dataset is also available from here.

Recent Publications:

G.M. Martin, M.A. Ringer, V.D. Pope, A. Jones, C. Dearden and T.J. Hinton, 2006: The physical properties of the atmosphere in the new Hadley Centre Global Environmental Model, HadGEM1. Part 1: Model description and global climatology - J. Climate, Vol. 19, No. 7, pages 1274-1301 (1 April 2006)

M.A. Ringer, G.M. Martin, C.Z. Greeves, T.J. Hinton, P.M. James, V.D. Pope, A.A. Scaife, R.A. Stratton, P.M. Inness, J.M. Slingo, and G.-Y. Yang, 2006: The physical properties of the atmosphere in the new Hadley Centre Global Environmental Model, HadGEM1. Part 2: Aspects of variability and regional climate - J. Climate, Vol. 19, No. 7, pages 1302–1326 (1 April 2006)

T. C. Johns, C. F. Durman, H. T. Banks, M. J. Roberts, A. J. McLaren, J. K. Ridley, C. A. Senior, K. D. Williams, A. Jones, G. J. Rickard, S. Cusack, W. J. Ingram, M. Crucifix, D. M. H. Sexton, M. M. Joshi, B-W. Dong, H. Spencer, R. S. R. Hill, J. M. Gregory, A.B. Keen, A. K. Pardaens, J. A. Lowe, A. Bodas-Salcedo, S. Stark, and Y. Searl, 2006: The new Hadley Centre climate model HadGEM1: Evaluation of coupled simulations - J. Climate, Vol. 19, No. 7, pages 1327–1353 (1 April 2006)

Citation

Date of citation

Who to Contact

General queries about these pages and access to the data should be directed to the BADC support line. Your query should be answered within one working day. When follow-up work is required, the BADC support will carry out the work as quickly and efficiently as possible, and in any case, the user will be kept informed of progress.

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