John Imbrie (July 4, 1925 – May 13, 2016) was an American paleoceanographer best known for his work on the theory of

ice ages An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and gree ...

. He was the grandson of William Imbrie, an American missionary to Japan. After serving with the

10th Mountain Division The 10th Mountain Division (Light Infantry) is a light infantry division in the United States Army based at Fort Drum, New York. Formerly designated as a mountain warfare unit, the division was the only one of its size in the US military to re ...

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...

during

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...

, Imbrie earned his

bachelor's degree A bachelor's degree (from Middle Latin ''baccalaureus'') or baccalaureate (from Modern Latin ''baccalaureatus'') is an undergraduate academic degree awarded by colleges and universities upon completion of a course of study lasting three to six ...

from

Princeton University Princeton University is a private research university in Princeton, New Jersey. Founded in 1746 in Elizabeth as the College of New Jersey, Princeton is the fourth-oldest institution of higher education in the United States and one of the ...

. He then went on to receive a

Ph.D. A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: or ') is the most common degree at the highest academic level awarded following a course of study. PhDs are awarded for programs across the whole breadth of academic fields. Because it is ...

from

Yale University Yale University is a Private university, private research university in New Haven, Connecticut. Established in 1701 as the Collegiate School, it is the List of Colonial Colleges, third-oldest institution of higher education in the United Sta ...

in 1951. He was elected to the National Academy of Sciences in 1978, and both the

American Philosophical Society The American Philosophical Society (APS), founded in 1743 in Philadelphia, is a scholarly organization that promotes knowledge in the sciences and humanities through research, professional meetings, publications, library resources, and communit ...

and the

American Academy of Arts and Sciences The American Academy of Arts and Sciences (abbreviation: AAA&S) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, a ...

in 1981. That same year, he was the recipient of a

MacArthur Fellowship The MacArthur Fellows Program, also known as the MacArthur Fellowship and commonly but unofficially known as the "Genius Grant", is a prize awarded annually by the John D. and Catherine T. MacArthur Foundation typically to between 20 and 30 indi ...

. He was awarded the Maurice Ewing Medal in 1986 by the AGU and the

William H. Twenhofel Medal The William H. Twenhofel Medal is the highest award given by the Society for Sedimentary Geology (SEPM). It was instituted in memory of William H. Twenhofel and is awarded annually to a person for his or her "Outstanding Contributions to Sedimentar ...

by the

Society for Sedimentary Geology The Society for Sedimentary Geology is an international not-for-profit, scientific society based in Oklahoma. It is commonly referred to by its acronym SEPM, which refers to its former name, the Society of Economic Paleontologists and Mineralogists. ...

in 1991, the only time the Society has awarded it to a non-member. Imbrie was on the faculty of the Geological Sciences Department at Brown University from 1967, where he held the Henry L. Doherty chair of Oceanography. He later served as

Professor Emeritus ''Emeritus'' (; female: ''emerita'') is an adjective used to designate a retired chair, professor, pastor, bishop, pope, director, president, prime minister, rabbi, emperor, or other person who has been "permitted to retain as an honorary title ...

at Brown. Imbrie is probably best known as a co-author of the paper in ''

Science Science is a systematic endeavor that Scientific method, builds and organizes knowledge in the form of Testability, testable explanations and predictions about the universe. Science may be as old as the human species, and some of the earli ...

'' in 1976, 'Variations in the Earth's orbit: Pacemaker of the ice ages'. Using ocean sediment cores, the ''Science'' paper verified the theories of

Milutin Milanković Milutin Milanković (sometimes anglicised as Milankovitch; sr-Cyrl, Милутин Миланковић ; 28 May 1879 – 12 December 1958) was a Serbian mathematician, astronomer, climatologist, geophysicist, civil engineer and popularizer of ...

that oscillations in climate over the past few million years are correlated with Earth's orbital variations of

eccentricity Eccentricity or eccentric may refer to: * Eccentricity (behavior), odd behavior on the part of a person, as opposed to being "normal" Mathematics, science and technology Mathematics * Off-Centre (geometry), center, in geometry * Eccentricity (g ...

axial tilt In astronomy, axial tilt, also known as obliquity, is the angle between an object's rotational axis and its orbital axis, which is the line perpendicular to its orbital plane; equivalently, it is the angle between its equatorial plane and orb ...

, and

precession Precession is a change in the orientation of the rotational axis of a rotating body. In an appropriate reference frame it can be defined as a change in the first Euler angle, whereas the third Euler angle defines the rotation itself. In oth ...

around the Sun. These changes are now called the

Milankovitch cycles Milankovitch cycles describe the collective effects of changes in the Earth's movements on its climate over thousands of years. The term was coined and named after Serbian geophysicist and astronomer Milutin Milanković. In the 1920s, he hypot ...

. He became a recipient of the Milutin Milankovic Medal with George Kukla in 2003. John Imbrie was featured in the video documentary The Last Ridge: The Uphill Battles of the 10th Mountain Division. He died in

Providence, Rhode Island Providence is the capital and most populous city of the U.S. state of Rhode Island. One of the oldest cities in New England, it was founded in 1636 by Roger Williams, a Reformed Baptist theologian and religious exile from the Massachusetts ...

, in 2016 at the age of 90. John Imbrie Obituary, ''Providence Journal'', May 16, 2016
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References

1925 births 2016 deaths Members of the United States National Academy of Sciences MacArthur Fellows Yale University alumni American meteorologists Lyell Medal winners Princeton University alumni United States Army personnel of World War II People from Penn Yan, New York Paleoclimatologists Scientists from New York (state) Brown University faculty Members of the American Philosophical Society {{US-scientist-stub

See also

References