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| DOI | 10.1175/JCLI-D-19-0659.1 |
| Interannual-to-multidecadal responses of antarctic ice shelf-ocean interaction and coastal water masses during the twentieth century and the early twenty-first century to dynamic and thermodynamic forcing | |
| Kusahara K. | |
| 发表日期 | 2020 |
| ISSN | 0894-8755 |
| 起始页码 | 4941 |
| 结束页码 | 4973 |
| 卷号 | 33期号:12 |
| 英文摘要 | Much attention has been paid to ocean-cryosphere interactions over the Southern Ocean. Basal melting of Antarctic ice shelves has been reported to be the primary ablation process for the Antarctic ice sheets. Warm waters on the continental shelf, such as Circumpolar Deep Water (CDW) and Antarctic Surface Water (AASW), play a critical role in active ice shelf basal melting. However, the temporal evolution and mechanisms of the basal melting and warm water intrusions throughout the twentieth century and the early twentyfirst century have not been rigorously examined and are not fully understood. Here, we conduct a numerical experiment of an ocean-sea ice-ice shelf model forced with a century-long atmospheric reanalysis for the period 1900-2010. To begin with, we provide an assessment of the atmospheric conditions by comparing with available observation and show biases in warming and stronger westerly trends. Taking into account the limitation, we examine the interannual-to-multidecadal variability in the Antarctic ice shelf basal melting and the role of coastal water masses.Aseries of numerical experiments demonstrate that wind stress changes over the Southern Ocean drive enhanced poleward heat transport by stronger subpolar gyres and reduce coastal sea ice and cold-water formations, both of which result in an increased ocean heat flux into Antarctic ice shelf cavities. Furthermore, an increase of sea ice-free days leads to enhanced regional AASW contribution to the basal melting. This study demonstrates that changes in Antarctic coastal water masses are key metrics for better understanding of the ocean-cryosphere interaction over the Southern Ocean. © 2020 American Meteorological Society. |
| 英文关键词 | Heat flux; Melting; Sea ice; Surface waters; Antarctic ice sheets; Antarctic ice shelves; Atmospheric conditions; Atmospheric reanalysis; Continental shelves; Multidecadal variability; Numerical experiments; Poleward heat transport; Oceanography; annual variation; basal melting; climate change; climate effect; thermodynamics; twentieth century; water mass; Southern Ocean |
| 语种 | 英语 |
| 来源期刊 | Journal of Climate
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/171260 |
| 作者单位 | Japan Agency for Marine-Earth Science and Technology, Yokohama, Kanagawa, Japan; Antarctic Climate and Ecosystems Research Centre, University of Tasmania, Hobart, TAS, Australia |
| 推荐引用方式 GB/T 7714 | Kusahara K.. Interannual-to-multidecadal responses of antarctic ice shelf-ocean interaction and coastal water masses during the twentieth century and the early twenty-first century to dynamic and thermodynamic forcing[J],2020,33(12). |
| APA | Kusahara K..(2020).Interannual-to-multidecadal responses of antarctic ice shelf-ocean interaction and coastal water masses during the twentieth century and the early twenty-first century to dynamic and thermodynamic forcing.Journal of Climate,33(12). |
| MLA | Kusahara K.."Interannual-to-multidecadal responses of antarctic ice shelf-ocean interaction and coastal water masses during the twentieth century and the early twenty-first century to dynamic and thermodynamic forcing".Journal of Climate 33.12(2020). |
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