Evidence for extreme climatic warmth from Late Cretaceous Arctic vertebrates

被引：200

作者：

Tarduno, JA

Brinkman, DB

Renne, PR

Cottrell, RD

Scher, H

Castillo, P

机构：

[1] Royal Tyrrell Museum Palaeontol, Drumheller, AB T0J 0Y0, Canada

[2] Berkeley Geochronol Ctr, Berkeley, CA 94709 USA

[3] Scripps Inst Oceanog, Div Geol Res, La Jolla, CA 92093 USA

来源：

SCIENCE | 1998年 / 282卷 / 5397期

关键词：

D O I：

10.1126/science.282.5397.2241

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A Late Cretaceous (92 to 86 million years ago) vertebrate assemblage from the high Canadian Arctic (Axel Heiberg Island) implies that polar climates were warm (mean annual temperature exceeding 14 degrees C) rather than near freezing. The assemblage includes Large (2.4 meters Long) champsosaurs, which are extinct crocodilelike reptiles. Magmatism at six Large igneous provinces at this time suggests that volcanic carbon dioxide emissions helped cause the global warmth.

引用

页码：2241 / 2244

页数：4

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