Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL072335 |
Initiation of Snowball Earth with volcanic sulfur aerosol emissions | |
Macdonald, F. A.1; Wordsworth, R.1,2 | |
2017-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We propose that the first Neoproterozoic Snowball Earth event, the Sturtian glaciation, was initiated by the injection of sulfate aerosols into the stratosphere. Geochronological data indicate that the Natkusiak magmatic assemblage of the Franklin large igneous province coincided with onset of the Sturtian glaciation. The Natkusiak was emplaced into an evaporite basin and entrained significant quantities of sulfur, which would have led to extensive SO2 and H2S outgassing in hot convective plumes. The largest of these plumes could havepenetrated the tropopause, leading to stratospheric sulfate aerosol formation and an albedo increase sufficient to force a Snowball. Radiative forcing was maximized by the equatorial location of the Franklin and the cool Neoproterozoic background climate, which would have lowered the tropopause height, increasing the rate of stratospheric aerosol injection. Our results have implications for understanding Phanerozoicmass extinctionevents, exoplanet habitability, andaerosolperturbations to the present-day climate. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396411100039 |
WOS关键词 | U-PB GEOCHRONOLOGY ; FLOOD-BASALT ERUPTIONS ; NEOPROTEROZOIC GLACIATIONS ; NORTHWEST-TERRITORIES ; VICTORIA-ISLAND ; PLUME HEIGHTS ; ARCTIC CANADA ; MANTLE PLUME ; CLIMATE ; AGE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28568 |
专题 | 气候变化 |
作者单位 | 1.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; 2.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA |
推荐引用方式 GB/T 7714 | Macdonald, F. A.,Wordsworth, R.. Initiation of Snowball Earth with volcanic sulfur aerosol emissions[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(4). |
APA | Macdonald, F. A.,&Wordsworth, R..(2017).Initiation of Snowball Earth with volcanic sulfur aerosol emissions.GEOPHYSICAL RESEARCH LETTERS,44(4). |
MLA | Macdonald, F. A.,et al."Initiation of Snowball Earth with volcanic sulfur aerosol emissions".GEOPHYSICAL RESEARCH LETTERS 44.4(2017). |
条目包含的文件 | 条目无相关文件。 |
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