Медаль Александра Агассиза

For his outstanding contributions to dynamic oceanography.

For his work in physical oceanography.

For his conduct of numerous oceanographic expeditions, his investigations of the life of eels, and the investigations of numerous problems connected with fishes, among which may be mentioned his work on fish genetics and geographic variation.

For his studies on atmospheric and oceanic circulation and his notable contributions to theoretical oceanography.

For his contributions to knowledge of the factors controlling organic production in the sea.

For his studies of the Gulf stream system, for his leadership in the development of a general program of the physical oceanography of the North Atlantic, and for his distinctive direction of the Woods Hole Oceanographic Institution both in times of peace and war.

For his contributions to oceanography, particularly by his invention of an apparatus for the determination of gravity at sea, by making many measurements of gravity over each of the great oceans, and by the utilization of these observations in interpreting the physical properties and behavior of the Earth's crust.

For his distinguished contributions in tidal surveys. His projects have made available to oceanographers accurate, long-period records for large areas where previously very little observational data were available. The program and work which he has originated ultimately will produce reliable conclusions on present-day tectonic processes and the rate of change in the quantity of water in the ocean.

For his outstanding leadership in biological and general oceanography. Among Dr. Johnson's contributions are explanations for two newly discovered acoustic phenomena in the sea. These explanations brought biologist and physicists together in a common interest, and introduced underwater acoustics as a prime tool for marine ecology

For his investigations of the hydrography of the southern ocean.

For his significant investigations of the earth from its surface to its core.

For his stimulating and successful observations of the Gulf Stream and its vortices.

For his work at sea, in the laboratory, and by analyses through which he made major advances in understanding of ocean circulation and distribution of water masses.

For masterful achievements using isotopic palaeotemperatures to establish the climatic history of the Pleistocene and for suggesting their relation to the Milankovitch orbital cycles.

For his discovery of the flux-gate magnetometer, and for the marine magnetic anomaly surveys that led to the acceptance of the theory of sea-floor spreading.

For his pioneering studies, both theoretical and instrumental, of oceanic waves, microstructure and mixing, and of electromagnetic fields in the ocean and in the seafloor.

For innovative and insightful tracer experiments using sulfur hexafluoride to understand vertical diffusivity and turbulent mixing in the open ocean.

For leadership in establishing multi-disciplinary ocean-observing systems, for detection of decadal regime shifts in pelagic ecosystems, and for paradigm-shifting insights on biogeochemical cycles in the ocean.