most of the resonant regions are also responsible for large fractions of the total amount of tidal energy dissipated in the oceans. satellite altimeter data shows that the m tide dissipates approximately 2.5 tw, of which 261 gw is lost in the hudson bay complex, 208 gw on the european shelves (including the bristol channel), 158 gw on the north-west australian shelf, 149 gw in the yellow sea and 112 gw on the patagonian shelf.