Maurice Ewing

Maurice Ewing. Maurice "Doc" Ewing was a pioneering American geophysicist and oceanographer who fundamentally transformed earth sciences in the 20th century. He is best known for founding the Lamont–Doherty Earth Observatory, which became a global epicenter for marine geology and geophysics research. His relentless pursuit of seafloor data provided critical evidence for the theory of plate tectonics.

Early life and education

He was born in Lockney, Texas, and demonstrated an early aptitude for mathematics and science. Ewing earned his bachelor's, master's, and doctoral degrees in physics from Rice University in Houston, completing his PhD in 1931 under the guidance of Alexander McAdie. His doctoral research involved seismic experiments, laying the groundwork for his future career. Following his graduation, he conducted postdoctoral work at the University of Pittsburgh before beginning his academic career.

Career and research

Ewing began his professional career as a physics instructor at Lehigh University in Bethlehem, Pennsylvania. In 1944, he moved to Columbia University, where he established the Lamont Geological Observatory, later renamed the Lamont–Doherty Earth Observatory. He also maintained a long association with the Woods Hole Oceanographic Institution. Ewing directed numerous pioneering oceanographic expeditions aboard vessels like the RV Vema and RV Atlantis, systematically mapping the Atlantic Ocean floor. His research utilized innovative techniques in seismic refraction and underwater photography to study oceanic crust and sediment layers.

Contributions to geophysics

Ewing's empirical discoveries were monumental in shaping modern geology. He and his team, which included scientists like Bruce Heezen and Marie Tharp, meticulously charted the global system of mid-ocean ridges and discovered the Great Global Rift. His work on the thickness of pelagic sediment provided key evidence against the theory of a static Earth. Ewing's data on seafloor spreading and the structure of the Mohorovičić discontinuity beneath the oceans were instrumental in validating the theories of Harry Hammond Hess and the broader framework of plate tectonics. He also made significant contributions to the understanding of microseisms and tsunami generation.

Honors and awards

Throughout his distinguished career, Ewing received numerous prestigious accolades. He was awarded the William Bowie Medal, the highest honor of the American Geophysical Union, in 1957. In 1960, he received the Vetlesen Prize, often considered the Nobel Prize of the earth sciences. The National Academy of Sciences awarded him the John J. Carty Award in 1963. For his lifetime of scientific achievement, President Richard Nixon presented him with the National Medal of Science in 1973. He was also a member of both the American Academy of Arts and Sciences and the United States National Academy of Sciences.

Personal life and legacy

Ewing was known for his intense work ethic and demanding leadership style at Lamont–Doherty Earth Observatory. He married Margaret Kidder in 1938, and they had two sons. In 1972, he left Columbia University to help establish the Earth and Planetary Sciences division at the University of Texas at Austin. He died in Galveston, Texas in 1974. His legacy endures through the continued preeminence of the observatory he founded, which has trained generations of leading scientists. The Maurice Ewing Medal, awarded jointly by the American Geophysical Union and the United States Navy, is named in his honor, as was the research vessel USNS Maurice Ewing.

Category:American geophysicists Category:American oceanographers Category:National Medal of Science laureates