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| DOI | 10.1038/s41561-022-00950-1 |
| Ice-free tropical waterbelt for Snowball Earth events questioned by uncertain clouds | |
| Braun C.; Hörner J.; Voigt A.; Pinto J.G. | |
| 发表日期 | 2022 |
| ISSN | 1752-0894 |
| 起始页码 | 489 |
| 结束页码 | 493 |
| 卷号 | 15期号:6 |
| 英文摘要 | Geological evidence of active tropical glaciers reaching sea level during the Neoproterozoic (1,000–541 Ma), suggesting a global ocean completely covered in ice, was the key observation in the development of the hard Snowball Earth hypothesis. These conditions are hard to reconcile with the survival of complex marine life through Snowball Earth glaciations, which led to alternative waterbelt scenarios where a large-scale refugium was present in the form of a narrow ice-free strip in the tropical ocean. Here we assess whether a waterbelt scenario maintained by snow-free dark sea ice at low latitudes is plausible using simulations from two climate models run with a variety of cloud treatments in combination with an energy-balance model. Our simulations show that waterbelt states are not a robust and naturally emerging feature of Neoproterozoic climate. Intense shortwave reflection by mixed-phase clouds, in addition to a low albedo of bare sea ice, is needed for geologically relevant waterbelt states. Given the large uncertainty in mixed-phase clouds and their interaction with radiation, our results strongly question the idea that waterbelt scenarios can explain the Neoproterozoic geology. Hence, Neoproterozoic life has probably faced the harsh conditions of a hard Snowball Earth. © 2022, The Author(s), under exclusive licence to Springer Nature Limited. |
| 语种 | 英语 |
| 来源期刊 | Nature Geoscience
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/262184 |
| 作者单位 | Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany |
| 推荐引用方式 GB/T 7714 | Braun C.； Hörner J.； Voigt A.； Pinto J.G.. Ice-free tropical waterbelt for Snowball Earth events questioned by uncertain clouds[J],2022,15(6). |
| APA | Braun C.； Hörner J.； Voigt A.； Pinto J.G..(2022).Ice-free tropical waterbelt for Snowball Earth events questioned by uncertain clouds.Nature Geoscience,15(6). |
| MLA | Braun C.； Hörner J.； Voigt A.； Pinto J.G.."Ice-free tropical waterbelt for Snowball Earth events questioned by uncertain clouds".Nature Geoscience 15.6(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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