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DOI | 10.1038/s41561-019-0356-0 |
Basal melting of Ross Ice Shelf from solar heat absorption in an ice-front polynya | |
Stewart, Craig L.1,2; Christoffersen, Poul1; Nicholls, Keith W.3; Williams, Michael J. M.2; Dowdeswell, Julian A.1 | |
2019-06-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:6页码:435-+ |
文章类型 | Article |
语种 | 英语 |
国家 | England; New Zealand |
英文摘要 | Ice-ocean interactions at the bases of Antarctic ice shelves are rarely observed, yet have a profound influence on ice sheet evolution and stability. Ice sheet models are highly sensitive to assumed ice shelf basal melt rates; however, there are few direct observations of basal melting or the oceanographic processes that drive it, and consequently our understanding of these interactions remains limited. Here we use in situ observations from the Ross Ice Shelf to examine the oceanographic processes that drive basal ablation of the world's largest ice shelf. We show that basal melt rates beneath a thin and structurally important part of the shelf are an order of magnitude higher than the shelf-wide average. This melting is strongly influenced by a seasonal inflow of solar-heated surface water from the adjacent Ross Sea Polynya that downwells into the ice shelf cavity, nearly tripling basal melt rates during summer. Melting driven by this frequently overlooked process is expected to increase with predicted surface warming. We infer that solar heat absorbed in ice-front polynyas can make an important contribution to the present-day mass balance of ice shelves, and potentially impact their future stability. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000469459600010 |
WOS关键词 | SURFACE-WATER BENEATH ; SEA-ICE ; RADAR ; CIRCULATION ; ANTARCTICA ; DRIVEN ; OCEANOGRAPHY ; VARIABILITY ; THICKNESS ; BUDGET |
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/183932 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Cambridge, Scott Polar Res Inst, Cambridge, England; 2.Natl Inst Water & Atmospher Res, Wellington, New Zealand; 3.British Antarctic Survey, Cambridge, England |
推荐引用方式 GB/T 7714 | Stewart, Craig L.,Christoffersen, Poul,Nicholls, Keith W.,et al. Basal melting of Ross Ice Shelf from solar heat absorption in an ice-front polynya[J]. NATURE GEOSCIENCE,2019,12(6):435-+. |
APA | Stewart, Craig L.,Christoffersen, Poul,Nicholls, Keith W.,Williams, Michael J. M.,&Dowdeswell, Julian A..(2019).Basal melting of Ross Ice Shelf from solar heat absorption in an ice-front polynya.NATURE GEOSCIENCE,12(6),435-+. |
MLA | Stewart, Craig L.,et al."Basal melting of Ross Ice Shelf from solar heat absorption in an ice-front polynya".NATURE GEOSCIENCE 12.6(2019):435-+. |
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