Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074879 |
Quantifying the Release of Climate-Active Gases by Large Meteorite Impacts With a Case Study of Chicxulub | |
Artemieva, Natalia1; Morgan, Joanna2 | |
2017-10-28 | |
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:20 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | Potentially hazardous asteroids and comets have hit Earth throughout its history, with catastrophic consequences in the case of the Chicxulub impact. Here we reexamine one of the mechanisms that allow an impact to have a global effect-the release of climate-active gases from sedimentary rocks. We use the SOVA hydrocode and model ejected materials for a sufficient time after impact to quantify the volume of gases that reach high enough altitudes (> 25 km) to have global consequences. We vary impact angle, sediment thickness and porosity, water depth, and shock pressure for devolatilization and present the results in a dimensionless form so that the released gases can be estimated for any impact into a sedimentary target. Using new constraints on the Chicxulub impact angle and target composition, we estimate that 325 +/- 130 Gt of sulfur and 425 +/- 160 Gt CO2 were ejected and produced severe changes to the global climate. Plain language Summary Potentially hazardous asteroids and comets have hit Earth throughout its history, with catastrophic consequences in the case of the Chicxulub impact 66 Myr ago. Here we reexamine one of the mechanisms that allow an impact to have a global effect-the release of climate-active gases from terrestrial sedimentary rocks after the high-velocity impact. We estimate that 325 +/- 130 Gt of sulfur and 425 +/- 160 Gt CO2 were ejected into the atmosphere at velocities > 1 km/s. These numbers have to be used in global climate models to quantify possible changes of solar irradiation, surface temperature, and duration of stressful conditions for biota. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416761600012 |
WOS关键词 | CRETACEOUS-TERTIARY BOUNDARY ; K-PG BOUNDARY ; ASTEROID IMPACT ; ENVIRONMENTAL CONSEQUENCES ; RECOVERY EXPERIMENTS ; CRATER ; EXTINCTION ; WILDFIRES ; MEXICO ; MAGNETOSTRATIGRAPHY |
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/27401 |
专题 | 气候变化 |
作者单位 | 1.Planetary Sci Inst, Tucson, AZ 85719 USA; 2.Imperial Coll London, Dept Earth Sci & Engn, London, England |
推荐引用方式 GB/T 7714 | Artemieva, Natalia,Morgan, Joanna. Quantifying the Release of Climate-Active Gases by Large Meteorite Impacts With a Case Study of Chicxulub[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(20). |
APA | Artemieva, Natalia,&Morgan, Joanna.(2017).Quantifying the Release of Climate-Active Gases by Large Meteorite Impacts With a Case Study of Chicxulub.GEOPHYSICAL RESEARCH LETTERS,44(20). |
MLA | Artemieva, Natalia,et al."Quantifying the Release of Climate-Active Gases by Large Meteorite Impacts With a Case Study of Chicxulub".GEOPHYSICAL RESEARCH LETTERS 44.20(2017). |
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