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Myth 5A: EOFs produce physical modes
Myth 5B: EOFs canÕt produce physical modes

EOFs give Ômaximum variance linear modesÕ – whether they are Ôphysical modesÕ depends on the definition of ÔphysicalÕ. Linear modes with maximum variance should certainly be ÔinterestingÕ
Question: these are  EOFs. Which represent physical modes?
One, both or neither?
EOF1
EOF2
PNA-like
NAO-like
M.H.P. Ambaum, B.J. Hoskins, and D.B. Stephenson (2001), Corrigendum 2002