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DOI | 10.1002/2017GL073330 |
Global warming and ocean stratification: A potential result of large extraterrestrial impacts | |
Joshi, Manoj1,2; von Glasow, Roland1; Smith, Robin S.3; Paxton, Charles G. M.4; Maycock, Amanda C.5; Lunt, Daniel J.6; Loptson, Claire6; Markwick, Paul7 | |
2017-04-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Scotland |
英文摘要 | The prevailing paradigm for the climatic effects of large asteroid or comet impacts is a reduction in sunlight and significant short-term cooling caused by atmospheric aerosol loading. Here we show, using global climate model experiments, that the large increases in stratospheric water vapor that can occur upon impact with the ocean cause radiative forcings of over +20 W m(-2) in the case of 10km sized bolides. The result of such a positive forcing is rapid climatic warming, increased upper ocean stratification, and potentially disruption of upper ocean ecosystems. Since two thirds of the world's surface is ocean, we suggest that some bolide impacts may actually warm climate overall. For impacts producing both stratospheric water vapor and aerosol loading, radiative forcing by water vapor can reduce or even cancel out aerosol-induced cooling, potentially causing 1-2 decades of increased temperatures in both the upper ocean and on the land surface. Such a response, which depends on the ratio of aerosol to water vapor radiative forcing, is distinct from many previous scenarios for the climatic effects of large bolide impacts, which mostly account for cooling from aerosol loading. Finally, we discuss how water vapor forcing from bolide impacts may have contributed to two well-known phenomena: extinction across the Cretaceous/Paleogene boundary and the deglaciation of the Neoproterozoic snowball Earth. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401847500047 |
WOS关键词 | STRATOSPHERIC WATER-VAPOR ; BOUNDARY-CONDITIONS ; MASS EXTINCTION ; CLIMATE ; MODEL ; VERSION ; EARTH ; GCM ; END |
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/27207 |
专题 | 气候变化 |
作者单位 | 1.Univ East Anglia, Sch Environm Sci, Climat Res Unit, Norwich, Norfolk, England; 2.Univ East Anglia, Sch Environm Sci, Ctr Ocean & Atmospher Sci, Norwich, Norfolk, England; 3.Univ Reading, Natl Ctr Atmospher Sci, Reading, Berks, England; 4.Univ St Andrews, Ctr Res Ecol & Environm Modelling, St Andrews, Fife, Scotland; 5.Univ Leeds, Sch Earth & Environm, Leeds, W Yorkshire, England; 6.Univ Bristol, Sch Geog Sci, Bristol, Avon, England; 7.Getech PLC, Leeds, W Yorkshire, England |
推荐引用方式 GB/T 7714 | Joshi, Manoj,von Glasow, Roland,Smith, Robin S.,et al. Global warming and ocean stratification: A potential result of large extraterrestrial impacts[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(8). |
APA | Joshi, Manoj.,von Glasow, Roland.,Smith, Robin S..,Paxton, Charles G. M..,Maycock, Amanda C..,...&Markwick, Paul.(2017).Global warming and ocean stratification: A potential result of large extraterrestrial impacts.GEOPHYSICAL RESEARCH LETTERS,44(8). |
MLA | Joshi, Manoj,et al."Global warming and ocean stratification: A potential result of large extraterrestrial impacts".GEOPHYSICAL RESEARCH LETTERS 44.8(2017). |
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