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AAPG Bulletin


AAPG Bulletin, V. 84, No. 4 (April 2000), P. 466-471.

Ad Hoc Committee on Global Previous HitClimateNext Hit Issues: Annual Report1

Lee C. Gerhard2 and Bernold M. "Bruno" Hanson,3 Co-chairs

┬ęCopyright 2000. The American Association of Petroleum Geologists. All rights reserved.
1Manuscript received October 18, 1999; revised manuscript received October 29, 1999; final acceptance October 29, 1999.
2Kansas Geological Survey, 1930 Constant Avenue, Lawrence, Kansas 66047-3724; e-mail: [email protected]
3Independent, P.O. Drawer 1269, Midland, Texas 79702-1269.
Committee members who have contributed to this report: Lee C. Gerhard, co-chair; Bernold M. Hanson, co-chair; committee members: Roy D. Adams, John P. Bluemle, William L. Fisher, David Jenkins, Michael S. Johnson, Alfred H. Pekarek, E. A. Shinn, Douglas B. Swift, Don Wilde.


The AAPG Ad Hoc Committee on Global Previous HitClimateNext Hit Issues has studied the supposition of human-induced Previous HitclimateNext Hit change since the committee's inception in January 1998. This paper details the progress and findings of the committee through June 1999. At that time there had been essentially no geologic input into the global Previous HitclimateNext Hit change debate. The following statements reflect the current state of Previous HitclimateNext Hit knowledge from the geologic perspective as interpreted by the majority of the committee membership. The committee recognizes that new data could change its conclusions. The earth's Previous HitclimateNext Hit is constantly changing owing to natural variability in earth processes. Natural Previous HitclimateNext Hit variability over recent geological time is greater than reasonable estimates of potential human-induced greenhouse gas changes. Because no tool is available to test the supposition of human-induced Previous HitclimateNext Hit change and the range of natural variability is so great, there is no discernible human influence on global Previous HitclimateTop at this time.

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