Margaret S. Leinen | |
---|---|
Born | September 20, 1946 |
Nationality | American |
Alma mater | University of Rhode Island |
Occupation | Director |
Known for | Paleoceanography, Paleoclimatology |
Scientific career | |
Institutions | Scripps Institution of Oceanography, University of California, San Diego, University of Rhode Island |
Thesis | Paleochemical signatures in Cenozoic Pacific sediments (1979) |
Margaret Leinen (born September 20, 1946) is an American paleoceanographer and paleoclimatologist. In 2013, Leinen was appointed the 11th director of the Scripps Institution of Oceanography, as well as the dean of the School of Marine Sciences at the University of California, San Diego. [1] She founded the Climate Response Fund, a non-profit focused on enabling better understanding, regulation and responsible use of climate engineering research, and served as its president for a time. For two years, Leinen also worked as chief science officer for a startup company in green technology and climate change mitigation. [2] Leinen has also served as the U.S. Department of State science envoy for the oceans to Latin America and the Pacific. [3]
In 1969 Leinen received her Bachelor of Science degree in Geology from the University of Illinois, a master's in geological oceanography from Oregon State University in 1975, [4] and her doctorate in oceanography in 1980 from the University of Rhode Island. [5] [6]
She has been elected fellow of the American Association for the Advancement of Science [7] and of the Geological Society of America. [8] In 2016, she was selected as a U.S. Science Envoy by the United States State Department. [9] In 2020, Leinen was elected to the American Academy of Arts and Sciences [10] [2] and was named a fellow of The Oceanography Society [11] and an Honorary Member of the AMS in 2022. [12]
Dr. Leinen was selected to serve as co-chair of the Decade Advisory Board for UN Decade of Ocean Science for Sustainable Development and is a member of the Leadership Council of the Joint Ocean Commission Initiative. She has served as president of the American Geophysical Union, chair of the Atmospheric and Hydrospheric Science Section of the American Academy for the Advancement of Science, and president of the Oceanography Society. She serves on the boards of the California Ocean Science Trust and Science Counts. She is the vice chair of the research board of the $500 million Gulf of Mexico Research Initiative.
Oceanography, also known as oceanology, sea science, ocean science, and marine science, is the scientific study of the ocean, including its physics, chemistry, biology, and geology.
Scripps Institution of Oceanography (SIO) is the center for oceanography and Earth science at the University of California, San Diego. Its main campus is located in La Jolla, with additional facilities in Point Loma.
In oceanography, a gyre is any large system of ocean surface currents moving in a circular fashion driven by wind movements. Gyres are caused by the Coriolis effect; planetary vorticity, horizontal friction and vertical friction determine the circulatory patterns from the wind stress curl (torque).
The East Pacific Rise (EPR) is a mid-ocean rise, at a divergent tectonic plate boundary, located along the floor of the Pacific Ocean. It separates the Pacific plate to the west from the North American plate, the Rivera plate, the Cocos plate, the Nazca plate, and the Antarctic plate. It runs south from the Gulf of California in the Salton Sea basin in Southern California to a point near 55°S130°W, where it joins the Pacific-Antarctic Ridge (PAR) trending west-south-west towards Antarctica, near New Zealand. Much of the rise lies about 3,200 km (2,000 mi) off the South American coast and reaches a height about 1,800–2,700 m (5,900–8,900 ft) above the surrounding seafloor.
Robert Sinclair Dietz was an American scientist with the United States Coast and Geodetic Survey. Dietz, born in Westfield, New Jersey, was a marine geologist, geophysicist and oceanographer who conducted pioneering research along with Harry Hammond Hess concerning seafloor spreading, published as early as 1960–1961. While at the Scripps Institution of Oceanography he observed the nature of the Emperor chain of seamounts that extended from the northwest end of the Hawaiian Island–Midway chain and speculated over lunch with Robert Fisher in 1953 that something must be carrying these old volcanic mountains northward like a conveyor belt.
Charles David Keeling was an American scientist whose recording of carbon dioxide at the Mauna Loa Observatory confirmed Svante Arrhenius's proposition (1896) of the possibility of anthropogenic contribution to the greenhouse effect and global warming, by documenting the steadily rising carbon dioxide levels. The Keeling Curve measures the progressive buildup of carbon dioxide, a greenhouse gas, in the atmosphere.
Walter Heinrich Munk was an American physical oceanographer. He was one of the first scientists to bring statistical methods to the analysis of oceanographic data. Munk worked on a wide range of topics, including surface waves, geophysical implications of variations in the Earth's rotation, tides, internal waves, deep-ocean drilling into the sea floor, acoustical measurements of ocean properties, sea level rise, and climate change. His work won awards including the National Medal of Science, the Kyoto Prize, and induction to the French Legion of Honour.
Dr. Fred Noel Spiess was a naval officer, oceanographer and marine explorer. His work created new advances in marine technology including the FLIP Floating Instrument Platform, the Deep Tow vehicle for study of the seafloor, and the use of acoustics for underwater navigation and geodetic positioning.
Tanya Atwater is an American geophysicist and marine geologist who specializes in plate tectonics. She is particularly renowned for her early research on the plate tectonic history of western North America.
Harmon Craig was an American geochemist who worked briefly for the University of Chicago (1951-1955) before spending the majority of his career at Scripps Institution of Oceanography (1955-2003).
Miriam Kastner is a Bratislavan born, Israeli raised, American oceanographer and geochemist. Kastner is currently a distinguished professor at Scripps Institution of Oceanography at the University of California, San Diego. She is still recognized by her fundamental contributions to science and is well spoken of amongst colleagues.
Wolfgang "Wolf" Helmut Berger was a German-American oceanographer, geologist, micropaleontologist and emeritus professor at Scripps Institution of Oceanography and the University of California, San Diego. His research interests comprise "micropaleontology, marine sedimentation, ocean productivity, carbon cycle, ocean history, climate history, and history of oceanography."
The 1997–1998 El Niño was regarded as one of the most powerful El Niño–Southern Oscillation events in recorded history, resulting in widespread droughts, flooding and other natural disasters across the globe. It caused an estimated 16% of the world's reef systems to die, and temporarily warmed air temperature by 1.5 °C (2.7 °F) compared to the usual increase of 0.25 °C (0.45 °F) associated with El Niño events. The costs of the event were considerable, leading to global economic losses of US$5.7 trillion within five years.
Ellen Druffel is an American oceanographer and isotope geochemist known for her research using radiocarbon to track marine processes.
Kenneth Craig Macdonald is an American oceanographer and marine geophysicist born in San Francisco, California, in 1947. As of 2018 he is professor emeritus at the Department of Earth Science and the Marine Sciences Institute at the University of California, Santa Barbara (UCSB). His work focuses on the tectonics and geophysics of the global mid-oceanic ridge including its spreading centers and transform faults, two of the three types of plate boundaries central to the theory of plate tectonics. His work has taken him to the north and south Atlantic oceans, the north and south Pacific oceans, the Indian Ocean, the Red Sea and the Sea of Cortez, as well as to the deep seafloor on over 50 dives in the research submersible ALVIN. Macdonald has participated in over 40 deep sea expeditions, and was chief- or co-chief scientist on 31 expeditions.
The RISE Project (Rivera Submersible Experiments) was a 1979 international marine research project which mapped and investigated seafloor spreading in the Pacific Ocean, at the crest of the East Pacific Rise (EPR) at 21° north latitude. Using a deep sea submersible (ALVIN) to search for hydrothermal activity at depths around 2600 meters, the project discovered a series of vents emitting dark mineral particles at extremely high temperatures which gave rise to the popular name, "black smokers". Biologic communities found at 21° N vents, based on chemosynthesis and similar to those found at the Galápagos spreading center, established that these communities are not unique. Discovery of a deep-sea ecosystem not based on sunlight spurred theories of the origin of life on Earth.
Stanley Robert Hart is an American geologist, geochemist, leading international expert on mantle isotope geochemistry, and pioneer of chemical geodynamics.
Cindy Lee is a retired Distinguished Professor known for her research characterizing the compounds that comprise marine organic matter.
Rachel Haymon is a marine geologist known for her work linking geological and biological processes occurring at deep-sea hydrothermal vents. In 2005 she was elected a fellow of the Geological Society of America.