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| Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure | |
| Ryan, J. C.1; Smith, L. C.2; van As, D.3; Cooley, S. W.4; Cooper, M. G.5; Pitcher, L. H.6; Hubbard, A.7 | |
| 2019-03-01 | |
| 发表期刊 | SCIENCE ADVANCES
 |
| ISSN | 2375-2548 |
| 卷号 | 5期号:3 |
| 摘要 | Greenland Ice Sheet mass loss has recently increased because of enhanced surface melt and runoff. Since melt is critically modulated by surface albedo, understanding the processes and feedbacks that alter albedo is a prerequisite for accurately forecasting mass loss. Using satellite imagery, we demonstrate the importance of Greenland's seasonally fluctuating snowline, which reduces ice sheet albedo and enhances melt by exposing dark bare ice. From 2001 to 2017, this process drove 53% of net shortwave radiation variability in the ablation zone and amplified ice sheet melt five times more than hydrological and biological processes that darken bare ice itself. In a warmer climate, snowline fluctuations will exert an even greater control on melt due to flatter ice sheet topography at higher elevations. Current climate models, however, inaccurately predict snowline elevations during high melt years, portending an unforeseen uncertainty in forecasts of Greenland's runoff contribution to global sea level rise. |
| DOI | 10.1126/sciadv.aav3738 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | Science & Technology - Other Topics |
| WOS研究方向 | Science & Technology |
| WOS类目 | Multidisciplinary Sciences |
| WOS记录号 | WOS:000462564300064 |
| 出版者 | AMER ASSOC ADVANCEMENT SCIENCE |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 专题 | 任务一_子任务一 循证社会科学证据集成 任务一 |
| 作者单位 | 1.Brown Univ, Inst Brown Environm & Soc, Providence, RI 02912 USA 2.Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90024 USA 3.Brown Univ, Inst Brown Environm & Soc, Providence, RI 02912 USA 4.Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90024 USA 5.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA 6.Geol Survey Denmark & Greenland, Copenhagen, Denmark 7.Brown Univ, Inst Brown Environm & Soc, Providence, RI 02912 USA |
| 推荐引用方式 GB/T 7714 | Ryan, J. C.,Smith, L. C.,van As, D.,et al. Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure[J]. SCIENCE ADVANCES,2019,5(3). |
| APA | Ryan, J. C..,Smith, L. C..,van As, D..,Cooley, S. W..,Cooper, M. G..,...&Hubbard, A..(2019).Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure.SCIENCE ADVANCES,5(3). |
| MLA | Ryan, J. C.,et al."Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure".SCIENCE ADVANCES 5.3(2019). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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