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Intergovernmental Panel on Climate Change

(Encyclopedia) Intergovernmental Panel on Climate Change (IPCC), scientific panel created (1988) by two United Nations organizations, the UN Environment Program and the World Meteorological…

Climate Change (Global Warming)

Many climatologists believe that increasing atmospheric concentrations of carbon dioxide and other “greenhouse gasses“ released by human activities, such as burning fossil fuels and deforestation,…

Hansen, James Edward

(Encyclopedia) Hansen, James Edward, 1941–, American astrophysicist and climatologist, b. Denison, Iowa, Ph.D. Univ. of Iowa, 1967. In 1967 he joined the Goddard Institute for Space Studies, and…

Nordhaus, William Dabney

(Encyclopedia) Nordhaus, William Dabney, 1941–, American economist, b. Albuquerque, N.Mex., Ph.D. Massachusetts Institute of Technology, 1967. A professor at Yale since 1967, he has focused on the…

Hopkins, William

(Encyclopedia) Hopkins, William, 1793–1866, English geologist. Hopkins studied mathematics at Cambridge, and then supported himself as a private mathematics tutor. Many of England's best…

varve

(Encyclopedia) varve, in geology, pair of thin sedimentary layers formed annually by seasonal climatic changes. Usually found in glacial lake deposits, varves consist of a coarse-grained, light-…

Tulun

(Encyclopedia) Tulun tŭlo͞on´ inhabited atoll, Papua New Guinea, SW Pacific, in the N Solomons Islands chain 45 mi (72 km) NE of Buka. Also known as the Carteret Islands, Carteret Atoll, and…