Short review on the geophysical application of Ertel's potential vorticity theorem.</o:p>
Schröder W, Treder H J 1993: Theoretical concepts and observational implications in meteorology and geophysics. Science Edition, Bremen-Rönnebeck
Hoskins B J, McIntyre M E, Robertson W A 1985: Quart. J. Royal Met. Soc., 111, 887-946.
() 111 Quart. J. Royal Met. Soc. : 887 -946.
Meiss J D, Horton W 1983: Phys. Fluids, 26, 990-997.
() 26 Phys. Fluids : 990 -997.
Truesdell C 1951: Z. Angew. Math. Mech., 2, 109-114.
() 2 Z. Angew. Math. Mech. : 109 -114.
Friedman J L, Schutz B F 1978: Astrophysics J., 221, 937-957.
() 221 Astrophysics J. : 937 -957.
Ertel H 1962: Monatsberichte dtsch. Acad. Wiss. Berlin, 4, 292-296.
() 4 Monatsberichte dtsch. Acad. Wiss. Berlin .
Ertel H 1963: Monatsberichte dtsch. Acad. Wiss. Berlin, 5, 362-365.
() 5 Monatsberichte dtsch. Acad. Wiss. Berlin : 362 -365.
Friedman J L 1978: Comm. Math. Phys., 62, 247-278.
() 62 Comm. Math. Phys. : 247 -278.
Gill A E 1982: Atmosphere-ocean dynamics. Academic Press, London