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| DOI | 10.1146/annurev-earth-053018-060145 |
| Big Time | |
| Hoffman P.F. | |
| 发表日期 | 2019 |
| ISSN | 0084-6597 |
| 起始页码 | 1 |
| 结束页码 | 17 |
| 卷号 | 47 |
| 英文摘要 | The Proterozoic Eon was once regarded as the neglected middle half of Earth history. The name refers to early animals, but they did not appear until the eon (2.5-0.54 Ga) was nearly over. Eukaryotic cells and sexual reproduction evolved much earlier in the eon, as did chloroplasts. Molecular dioxygen, the presence of which altered the geochemical behavior of nearly every element essential to life, rose from negligible to near-modern levels, and then plummeted before rising fitfully again. Plate tectonics took on a modern form, and two supercontinents, Nuna and Rodinia, successively congregated and later dispersed. Climate regulatory failures, i.e., Snowball Earth, appear to be a uniquely Proterozoic phenomenon, having occurred twice in rapid succession near the end of the eon (from 717 to 660 Ma and from 650 to 635 Ma) and arguably once near its beginning (ca. 2.43 Ga). Dynamic sea glaciers covered Snowball Earth oceans from pole to pole, and equatorial sublimation drove slow-moving ice sheets on land. Ultimately, the gradual accumulation of CO 2 triggered rapid deglaciation and transient greenhouse aftermaths. Physically based and geologically tested, Neoproterozoic Snowball Earth appears to have molecular legacies in ancient bitumens and modern organisms. This is the story of my love affair with an eon that is now a little less neglected. © 2019 by Annual Reviews. All rights reserved. |
| 关键词 | CarbonatesPolesTectonicsautobiographyPeer reviewProterozoicSnowball EarthSupercontinentsEarth (planet)biographychloroplastdeglaciationearly Eartheukaryoteliterature reviewmolecular ecologyplate tectonicsProterozoicsexual reproductionsupercontinentAnimaliaEukaryota |
| 语种 | 英语 |
| 来源机构 | Annual Review of Earth and Planetary Sciences |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/131931 |
| 推荐引用方式 GB/T 7714 | Hoffman P.F.. Big Time[J]. Annual Review of Earth and Planetary Sciences,2019,47. |
| APA | Hoffman P.F..(2019).Big Time.,47. |
| MLA | Hoffman P.F.."Big Time".47(2019). |
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