Data Access

Access restrictions for Bluelink data

The latest model runs completed under Bluelink are the OFAM3 pinup run, and version 3p5 of the Bluelink ReANalysis (BRAN3p5). The data use agreement for these runs is currently being finalised and will be made available soon. It is anticipated that these new datasets will be made freely available for non-commercial purposes.

Access to model data output is restricted to registered users. If you know of someone who would be interested in the output then please direct them to our web page at here.

External users can access the data using an OPeNDAP client(Information about OPeNDAP is available at

A tool named getnc which enables OPeNDAP data to be read into matlab is described at

Datasets that are currently available are then found under 8 subdirectories BRAN2.2, BRAN2.1, MonthlyMeans, SPINUP4Means, SPINUP5, SPINUP4Means, SPINUP5Means and SPINUP4Means. To understand the names of these directories we need to know a little more about the hindcast run itself. First there was a spinup run – SPINUP4; this goes from 1 January 1991 to 31 March 2005. The spinup was then restarted as SPINUP5 with some changes intended to correct a warm bias. One important change was to one of the parameters of the Chen mixed-layer scheme. SPINUP5 was started using the 1 January 1993 fields of SPINUP4 and continued to 31 December1997.

The final state of SPINUP5 was then used as initial conditions for the BRAN2.1 reanalysis run. We have archived the output from 14 October 1992 to 31 December 2006. It should be noted that the BRAN2.1 run is itself divided into two parts in which different forcing fields were used. The first part was from 1 July 1992 to 29 August 2002 and was forced with the ERA40 data (2.5 X 2.5 degrees, 6 hourly). The second part was forced by high resolution ECMWF forecast fields (0.5 X 0.5 degres, 6 hourly).

BRAN2.2 was then started using the end part of the BRAN2.1 run for its initial conditions. It uses a different method of data assimilation, however. Note that BRAN2.2 is referred to as BRAN_EXT in some documentation

The relevant data are spread over 8 subdirectories which are, in turn, divided into other subdirectories. The base subdirectories are named BRAN2.2, BRAN2.1,SPINUP4, SPINUP5, BRAN2.1MonthlyMeans, SPINUP4and5Means,SPINUP4Means and SPINUP5Means, described below and on the BRAN page.

BRAN2.2, BRAN2.1, SPINUP4 and SPINUP5 have identical subdirectories whose contents are described below.


BRAN2.1MonthlyMeans is at It contains three types of monthly mean files for the BRAN2.1 run.

SPINUP4and5Means, SPINUP4Means and SPINUP5Means are very similar. Note that Spinup4and5 is actually a composite constructed using 1993-1997 Spinup5 and 1998-2004 spinup4 inclusive. SPINUP4Means and SPINUP5Means each have a subdirectory MonthlyMeans. Likewise SPINUP4Means and SPINUP4and5Means have a subdirectory MonthlyClimatology. The contents of these directories are described below. (Note that, for historical reasons, different naming conventions were followed for spinup4and5.).