Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD026621 |
Snowball Earth: Asynchronous coupling of sea-glacier flow with a global climate model | |
Pollard, D.1; Kasting, J. F.1,2; Zugger, M. E.3 | |
2017-05-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | During Snowball Earth episodes of the Neoproterozoic and Paleoproterozoic, limited amounts of tropical open ocean (Jormungand), or tropical ocean with thin ice cover, would help to explain (1) vigorous glacial activity in low latitudes, (2) survival of photosynthetic life, and (3) deglacial recovery without excessive buildup of atmospheric CO2. Some previous models have suggested that tropical open ocean or thin-ice cover is possible; however, its viability in the presence of kilometer-thick sea glaciers flowing from higher latitudes has not been demonstrated conclusively. Here we describe a new method of asynchronously coupling a zonal sea-glacier model with a 3-D global climate model and apply it to Snowball Earth. Equilibrium curves of ice line versus CO2 are mapped out, as well as their dependence on ocean heat transport efficiency, sea-glacier flow, and other model parameters. No climate states with limited tropical open ocean or thin ice are found in any of our model runs, including those with sea glaciers. If this result is correct, then other refugia such as cryoconite pans would have been required for life to survive. However, the reasons for the differences between our results and others should first be resolved. It is suggested that small-scale convective dynamics, affecting fractional snow cover in low latitudes, may be a critical factor accounting for these differences. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404131500008 |
WOS关键词 | MODERN SOFT SNOWBALL ; THIN-ICE SOLUTION ; INITIATION ; CO2 ; CIRCULATION ; SIMULATIONS ; GLACIATION ; DYNAMICS |
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/33412 |
专题 | 气候变化 |
作者单位 | 1.Penn State Univ, Earth & Environm Syst Inst, University Pk, PA 16802 USA; 2.Penn State Univ, Dept Geosci, University Pk, PA 16802 USA; 3.Penn State Univ, Appl Res Lab, State Coll, PA 16804 USA |
推荐引用方式 GB/T 7714 | Pollard, D.,Kasting, J. F.,Zugger, M. E.. Snowball Earth: Asynchronous coupling of sea-glacier flow with a global climate model[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(10). |
APA | Pollard, D.,Kasting, J. F.,&Zugger, M. E..(2017).Snowball Earth: Asynchronous coupling of sea-glacier flow with a global climate model.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(10). |
MLA | Pollard, D.,et al."Snowball Earth: Asynchronous coupling of sea-glacier flow with a global climate model".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.10(2017). |
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