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Analysis Of Forcing Methods For Single-Column Models

By Sam Iacobellis Richard, Richard C. J. Somerville and Dana E. Lane


INTRODUCTION The single-column model (SCM) is a diagnostic model resembling a single vertical column of a 3dimensional general circulation model (GCM). The SCM includes physical parameterizations which are currently used in modern GCMs. Due to the onedimensionality of the SCM, the horizontal advection of heat, moisture and momentum are supplied to the model from either observations or 3-dimensional numerical analyses. Single-column models are being used increasingly to both develop and evaluate parameterizations and are an integral component of the Atmospheric Radiation Measurement (ARM) Program research strategy. Despite the rapid increase in the use of SCMs, there remain important questions in regards to the best method of forcing or "running" the SCM. A recent study has found that the temperature and humidity evolution from a particular SCM displayed significant sensitivity to perturbations in the initial conditions. It is not known if this sensitivity is unique to the pa

Year: 2000
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