6.19.1 Introduction

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1.1 Introduction

1.3 Continuous equations in `r' coordinates

2. Discretization and Algorithm

4. Software Architecture

5. Automatic Differentiation

6. Physical Parameterization and Packages

7. Diagnostics and tools

8. Interface with ECCO

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6.19.1 Introduction

Package rw is an interface to the more general mdsio package. The rw package can be used to write or read direct-access Fortran binary files for two-dimensional XY and three-dimensional XYZ arrays. The arrays are assumed to have been declared according to the standard MITgcm two-dimensional or three-dimensional floating point array type:

C     Example of declaring a standard two dimensional "long" 
C     floating point type array (the _RL macro is usually 
C     mapped to 64-bit floats in most configurations)
      _RL anArray(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)

Each call to an rw read or write routine will read (or write) to the first record of a file. To write direct access Fortran files with multiple records use the package mdsio (see section 6.16). To write self-describing files that contain embedded information describing the variables being written and the spatial and temporal locations of those variables use the package mnc (see section 6.15) which produces netCDF [44] based output.

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