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DOI | 10.1038/s41561-019-0420-9 |
West Antarctic ice loss influenced by internal climate variability and anthropogenic forcing | |
Holland, Paul R.1; Bracegirdle, Thomas J.1; Dutrieux, Pierre2; Jenkins, Adrian1; Steig, Eric J.3 | |
2019-09-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:9页码:718-+ |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA |
英文摘要 | Recent ice loss from the West Antarctic Ice Sheet has been caused by ocean melting of ice shelves in the Amundsen Sea. Eastward wind anomalies at the shelf break enhance the import of warm Circumpolar Deep Water onto the Amundsen Sea continental shelf, which creates transient melting anomalies with an approximately decadal period. No anthropogenic influence on this process has been established. Here, we combine observations and climate model simulations to suggest that increased greenhouse gas forcing caused shelf-break winds to transition from mean easterlies in the 1920s to the near-zero mean zonal winds of the present day. Strong internal climate variability, primarily linked to the tropical Pacific, is superimposed on this forced trend. We infer that the Amundsen Sea experienced decadal ocean variability throughout the twentieth century, with warm anomalies gradually becoming more prevalent, offering a credible explanation for the ongoing ice loss. Existing climate model projections show that strong future greenhouse gas forcing creates persistent mean westerly shelf-break winds by 2100, suggesting a further enhancement of warm ocean anomalies. These wind changes are weaker under a scenario in which greenhouse gas concentrations are stabilized. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000484058100011 |
WOS关键词 | AMUNDSEN SEA EMBAYMENT ; CIRCUMPOLAR DEEP-WATER ; PINE ISLAND GLACIER ; OCEANOGRAPHIC CONTROLS ; TROPICAL PACIFIC ; GREENHOUSE-GAS ; SHELF ; SURFACE ; ENSO ; IMPACT |
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/186881 |
专题 | 地球科学 气候变化 |
作者单位 | 1.British Antarctic Survey, Cambridge, England; 2.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA; 3.Univ Washington, Dept Earth & Space Sci, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Holland, Paul R.,Bracegirdle, Thomas J.,Dutrieux, Pierre,et al. West Antarctic ice loss influenced by internal climate variability and anthropogenic forcing[J]. NATURE GEOSCIENCE,2019,12(9):718-+. |
APA | Holland, Paul R.,Bracegirdle, Thomas J.,Dutrieux, Pierre,Jenkins, Adrian,&Steig, Eric J..(2019).West Antarctic ice loss influenced by internal climate variability and anthropogenic forcing.NATURE GEOSCIENCE,12(9),718-+. |
MLA | Holland, Paul R.,et al."West Antarctic ice loss influenced by internal climate variability and anthropogenic forcing".NATURE GEOSCIENCE 12.9(2019):718-+. |
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