6.21.1 Introduction

About

Installation

Tutorials

Documentation

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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Next: 6.21.2 Key subroutines and Up: 6.21 GCHEM Package Previous: 6.21 GCHEM Package Contents

6.21.1 Introduction

This package has been developed as interface to the PTRACERS package. The purpose is to provide a structure where various (any) tracer experiments can be added to the code. For instance there are placeholders for routines to read in parameters needed for any tracer experiments, a routine to read in extra fields required for the tracer code, routines for either external forcing or internal interactions between tracers and routines for additional diagnostics relating to the tracers. Note that the gchem package itself is only a means to call the subroutines used by specific biogeochemical experiments, and does not "do" anything on its own.

There are two examples: cfc which looks at 2 tracers with a simple external forcing and dic with 5 tracers whose tendency terms are related to one another. We will discuss these here only as how they provide examples to use this package.

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