Alth2=sqrt(viscC2leith**2*grdVrt+viscC2leithD**2*grdDiv)*L3
Alth2=(viscC2leith*grdVrt+(viscC2leithD*grdDiv))*L3
L3=(L2**1.5)
_RL recip_dt,L2,L3,L4,L5,L2rdt,L4rdt