110:. In his overdue-glaciation hypothesis Ruddiman claims that an incipient ice age would probably have begun several thousand years ago, but the arrival of that scheduled ice age was forestalled by the activities of early farmers. The overdue-glaciation hypothesis has been challenged on the grounds that alternative explanations are sufficient to account for the current warm anomaly without recourse to human activity, but Ruddiman challenges the methodology of his critics (see external links).
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activities of our early agrarian ancestors. It was at that time that atmospheric greenhouse gas concentrations stopped following the periodic pattern of rises and falls that had accurately characterized their past long-term behavior, a pattern which is well explained by natural variations in the
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through increases in chemical weathering and was therefore a major causal factor in the
Cenozoic Cooling trend that eventually led to our most recent series of
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H.V. Cabadas-BĂĄez, S. Sedov, S. JimĂ©nez-Ălvarez, D. Leonard, B. Lailson-Tinoco, R. GarcĂa-Moll, I. Ancona-AragĂłn, L. HernĂĄndez (2017).
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Raymo, M.E.; Ruddiman, W.F.; Froelich, P.N. (July 1988). "Influence of late
Cenozoic mountain building on ocean geochemical cycles".
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he hypothesised that the uplift of the
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Ruddiman, William F. (December 2003). "The anthropogenic greenhouse era began thousands of years ago".
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did not begin in the eighteenth century with advent of coal-burning factories and power plants of the
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in 1991, serving as a professor in
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circulation that dominates Asia today. With his then graduate student
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Plows, Plagues, and
Petroleum: How Humans Took Control of Climate
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Ruddiman is also known for his hypothesis in the 1980s that the
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10.1130/0091-7613(1988)016<0649:IOLCMB>2.3.CO;2
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but date back to 8,000 years ago, triggered by the intense
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over several time scales. He is a Fellow of both the
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Climate
Changes at Geologic Time Scales: An Overview
171:2014 American Geophysical Union's Tyndall Lecture
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459:"Debate over the Early Anthropogenic Hypothesis"
173:. He has published over 125 scientific papers.
481:by WF Ruddiman, 2008 conference presentation.
42:. Ruddiman earned an undergraduate degree in
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487:EOS, 2016, summarizes Ruddiman et al. 2016,
402:"How Did Humans First Alter Global Climate?"
254:: CS1 maint: multiple names: authors list (
510:American non-fiction environmental writers
16:American palaeoclimatologist and professor
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62:from 1969 to 1976, and at Columbia's
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400:Ruddiman, William F. (March 2005).
58:in 1969. Ruddiman worked at the US
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466:Muir, Hazel (3 September 2008).
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305:"Geological Society-2010 awards"
196:Earth's Climate, Past and Future
163:Earth's Climate, Past and Future
89:Ruddiman is best known for his '
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66:from 1976 to 1991. He moved to
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330:(1st ed.). W.H. Freeman.
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198:(2nd ed.). W.H. Freeman.
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461:. RealClimate. December 2005.
326:Ruddiman, William F. (2013).
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76:Geological Society of America
468:"The ice age that never was"
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121:created the highly seasonal
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307:. Royal Geographic Society
80:American Geophysical Union
60:Naval Oceanographic Office
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535:Williams College alumni
515:American climatologists
106:Earth's orbit known as
355:University of Virginia
40:University of Virginia
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489:Reviews of Geophysics
169:, the subject of the
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382:William F. Ruddiman
351:Ruddiman's home page
165:, and most recently
540:Lyell Medal winners
525:Paleoclimatologists
407:Scientific American
283:1988Geo....16..649R
140:He was awarded the
108:Milankovitch cycles
56:Columbia University
32:palaeoclimatologist
28:William F. Ruddiman
379:has a profile for
91:early anthropocene
36:Professor Emeritus
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337:978-1-4641-0776-4
328:Earth Transformed
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167:Earth Transformed
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