Through thick and thin: Marine and meteoric ice in a "Snowball Earth" climate

被引：32
|
作者：
Goodman, Jason C. [1 ]
机构：
[1] Woods Hole Oceanog Inst, Dept Phys Oceanog, Woods Hole, MA 02346 USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 16期
关键词：
D O I：
10.1029/2006GL026840
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Marine ice cover in the frigid Neoproterozoic climate system tends to isolate the ocean: the thickness of this ice, and thus the degree of isolation, is an important unknown in geochemical and biological arguments regarding the fully-glaciated "Snowball Earth'' hypothesis. The Pollard and Kasting ( 2005) coupled atmosphere/ice model has been modified to track ice of marine and atmospheric origin separately, and model their different optical properties. In contrast to Pollard and Kasting's results, a tropical region of thin ice is not stable in this model: ice is hundreds of meters thick everywhere. The overall pattern of the hydrological cycle in a Snowball climate is also discussed.
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