Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-018-4319-8 |
Ensemble global warming simulations with idealized Antarctic meltwater input | |
Park, W.1; Latif, M.1,2 | |
2019-03-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 52页码:3223-3239 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | The Earth will exhibit continued global surface warming in response to a sustained increase of atmospheric carbon dioxide (CO2) levels. Massive meltwater input from the Antarctic ice sheet into the Southern Ocean could be one consequence of this warming. Here we investigate the impacts which this meltwater input may have on Earth's surface climate and ocean circulation in a warming world. To this end a set of ensemble experiments has been conducted with a global climate model forced by increasing atmospheric CO2-concentration and an idealized Antarctic meltwater input to the Southern Ocean with varying amplitude and spatial pattern. As long as the atmospheric CO2-concentration stays moderate, i.e. below approximately twice the preindustrial concentration, and if a strong meltwater forcing of either 0.05 or 0.1Sv is applied, enhanced Antarctic sea-ice cover and surface air temperature cooling over most parts of the Southern Ocean is observed. When the atmospheric CO2-concentration becomes larger than twice the preindustrial concentration, the meltwater only plays a minor role. The Antarctic meltwater drives significant slowing of the Southern Ocean meridional overturning circulation (MOC). Again, the meltwater influence only is detectable as long as the CO2-forcing is moderate. Much larger MOC changes develop in response to highly elevated atmospheric CO2-levels independent of whether or not a meltwater forcing is applied. The response of the Antarctic circumpolar current (ACC) is nonlinear. Substantial and persistent ACC slowing is simulated when solely the meltwater forcing of 0.1Sv is applied, which is due to the halt of Weddell Sea deep convection and subsequent collapse of the Southern Ocean MOC. When the increasing atmospheric CO2-concentration additionally drives the model the ACC partly recovers in the long run. The partial recovery is due to strengthening westerly wind stress over the Southern Ocean, which intensifies the Ekman Cell. This study suggests that Southern Hemisphere climate projections for the twenty-first century could benefit from incorporating interactive Antarctic ice sheet. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000463842700040 |
WOS关键词 | SEA-LEVEL RISE ; SOUTHERN-OCEAN ; CIRCUMPOLAR CURRENT ; ICE SHELVES ; FRESH-WATER ; CLIMATE ; VARIABILITY ; CIRCULATION ; CONVECTION ; TRENDS |
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/181449 |
专题 | 气候变化 |
作者单位 | 1.GEOMAR Helmholtz Ctr Ocean Res Kiel, Dusternbrooker Weg 20, D-24105 Kiel, Germany; 2.Univ Kiel, Cluster Excellence Future Ocean, D-24105 Kiel, Germany |
推荐引用方式 GB/T 7714 | Park, W.,Latif, M.. Ensemble global warming simulations with idealized Antarctic meltwater input[J]. CLIMATE DYNAMICS,2019,52:3223-3239. |
APA | Park, W.,&Latif, M..(2019).Ensemble global warming simulations with idealized Antarctic meltwater input.CLIMATE DYNAMICS,52,3223-3239. |
MLA | Park, W.,et al."Ensemble global warming simulations with idealized Antarctic meltwater input".CLIMATE DYNAMICS 52(2019):3223-3239. |
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