why cluster on structural variables can you cluster on structural model why is it difficult to cluster on a _______ variable why clustering on _structural variable why do we use clustering on structural variables why cluster on the input and output variables why use clustering and input variables what is structural and time of day in an aea model why do we cluster the input and output variables? why use a cluster for downward radiation why is clustering important for land surface model output which input variable can be clustered? why is it not a good idea to cluster on an output variable which variables can cluster on why is it important to cluster does a climate model use structural variables for climate what type of variable is the downward radiation why use clustering on structural variables when should the clustering method be applied to the input variables? why do you cluster on static input variables