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Journal of the Geological Society

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Global atmospheric circulation experiments on an Earth with polar and tropical continents

¹ Museum, Department of Geology, and Cooperative Institute for Research in Environmental Sciences, Campus Box 449, University of Colorado, Boulder, CO 80309, USA and Institut für Paläontologie und historische Geologie, Ludwig-Maximillians Universität, Richard-Wagner-Str. 10, 8000 München 2, Federal Republic of Germany
² Earth System Science Center, 512 Deike Building, The Pennsylvania State University, University Park, PA 16802, USA
³ National Center for Atmospheric Research, PO Box 3000, Boulder, CO 80307-3000, USA

Two general circulation models forced by mean annual insolation and having an energy balance ocean have been run on an Earth with polar continents and a tropical continent. Polar continents produce strong meridional temperature gradients and a maximum hydrological cycle. A tropical continent produces the warmest planet and a minimal hydrological cycle. Both models produce more arid continents than exist today.

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