> has two different approaches to reading the data.  The default
    behavior is to load in time chunks such that each double-precision 
    variable read in is smaller than a specified size, chosen as 16 GB.
 
    <a href="ncinterp.html">NCINTERP</a>(...,M) instead uses M gigabytes as the cutoff for the chunk. 
    This method tends to be relatively fast.
 
    <a href="ncinterp.html">NCINTERP</a>(...,'loop') alternatively reads each time slice invididually
    This method is very slow and is recommended o