“…In the experiments of Donelan et al (1992) performed on Lake St.Clair, as well as in some earlier experiments by Moskowitz (1964), andSMB CERC (1977), the downshift is arrested approximately at χ crit 5×10 4 . It corresponds to a very long fetch, χ crit 10 4 L, where L is a characteristic wave length.…”