Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0883.1 |
Triggering Global Climate Transitions through Volcanic Eruptions | |
Gupta, Mukund1; Marshall, John1; Ferreira, David2 | |
2019-06-01 | |
发表期刊 | JOURNAL OF CLIMATE
![]() |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:12页码:3727-3742 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | A coupled climate model with idealized representations of atmosphere, ocean, sea ice, and land is used to investigate transitions between global climate equilibria. The model supports the presence of climates with limited ice cover (Warm), a continuum of climates in which sea ice extends down into the midlatitudes and the tropics (Cold), together with a completely ice-covered earth (Snowball). Transitions between these states are triggered through volcanic eruptions, where the radiative effect of stratospheric sulfur emissions is idealized as an impulse reduction in incoming solar radiation. Snowball transitions starting from the Cold state are more favorable than from the Warm state, because less energy must be extracted from the system. However, even when starting from a Cold climate, Toba-like volcanic events (cooling of order -100 W m(-2)) must be sustained continuously for several decades to glaciate the entire planet. When the deep ocean is involved, the volcanic response is characterized by relaxation time scales spanning hundreds to thousands of years. If the interval between successive eruptions is significantly shorter (years to decades) than the ocean's characteristic time scales, the cumulative cooling can build over time and initiate a state transition. The model exhibits a single hysteresis loop that connects all three climate equilibria. When starting from a Snowball, the model cannot access the Cold branch without first transitioning to an ice-free climate and completing the hysteresis loop. By contrast, a Cold state, when warmed, transitions to the Warm equilibrium without any hysteresis. |
英文关键词 | Albedo Climate sensitivity Forcing Glaciation Paleoclimate Stability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000469965800001 |
WOS关键词 | ICE CAP INSTABILITY ; SEA-ICE ; SNOWBALL EARTH ; MULTIPLE EQUILIBRIA ; OCEAN ; MODEL ; INITIATION ; SIMULATIONS ; VARIABILITY ; GLACIATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/183868 |
专题 | 气候变化 |
作者单位 | 1.MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 2.Univ Reading, Dept Meteorol, Reading, Berks, England |
推荐引用方式 GB/T 7714 | Gupta, Mukund,Marshall, John,Ferreira, David. Triggering Global Climate Transitions through Volcanic Eruptions[J]. JOURNAL OF CLIMATE,2019,32(12):3727-3742. |
APA | Gupta, Mukund,Marshall, John,&Ferreira, David.(2019).Triggering Global Climate Transitions through Volcanic Eruptions.JOURNAL OF CLIMATE,32(12),3727-3742. |
MLA | Gupta, Mukund,et al."Triggering Global Climate Transitions through Volcanic Eruptions".JOURNAL OF CLIMATE 32.12(2019):3727-3742. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论