Cenozoic Plants and Climates of the Arctic

Volume 27 of the series NATO ASI Series pp 267-295

An Estimate of the Early Tertiary Paleoclimate of the Southern Arctic

  • B. H. TiffneyAffiliated withDepartment of Geological Sciences, University of California

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The early Tertiary southern Arctic was an important biogeographic exchange route between the Old and New Worlds. A variant of the nearest living relative method of paleoclimatic estimation suggests that the mean temperature of the coldest month of the Eocene southern Arctic was about 10 °C, with the possibility of limited frost. The mean annual range of temperature was probably low, and moisture availability may have been limited in the cool season.