This directory contains several files pertaining to the vertical
mixing used in the HOPS PE model.

ppmix.F   -  Sets vertical mixing coefficients for Pacanowski & Philander scheme
cnvmix.F  -  Sets vertical mixing coefficients for constant basic profile.

vmix_aux.F  -  Contains several routines called by above two routines.

invtri.F  -  Inverts tri-diagonal mixing coefficient matrix

tracer.F  -  Sets tracer vertical mixing & calls invtri.F

step.F  -  basic time step loop. calls ppmix.F & cnvmix.F

pe_vmix.pdf  -  describes HOPS vertical mixing scheme
ppmix.pdf    -  describes Pacanowski & Philander implementation w/ references
                (comparison bullet #1 in this file is a red herring)