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DOI | 10.1029/2021GL092692 |
Deriving melt rates at a complex ice shelf base using in‐situ radar: Application to Totten Ice Shelf | |
Irena Vaň; ková; Sue Cook; J. Paul Winberry; Keith W. Nicholls; Benjamin K. Galton‐; Fenzi | |
2021-03-10 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2021 |
英文摘要 | A phase‐sensitive radar (ApRES) was deployed on Totten Ice Shelf to provide the first in‐situ basal melt estimate at this dynamic East Antarctic ice shelf. Observations of internal ice dynamics at tidal timescales showed that early arrivals from off‐nadir reflectors obscure the true depth of the ice shelf base. Using the observed tidal deformation, the true base was was found to lie at 1910‐1950 m depth, at 350‐400 m greater range than the first reflection from an ice‐ocean interface. The robustness of the basal melt rate estimate was increased by using multiple basal reflections over the radar footprint, yielding a melt rate of 22 ± 2.1 m a−1. The ApRES estimate is over 40% lower than the three existing satellite estimates covering Totten Ice Shelf. This difference in basal melt is dynamically significant and highlights the need for independent melt rate estimates using complementary instrumentation and techniques that rely on different sets of assumptions. |
领域 | 气候变化 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/318600 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Irena Vaň,ková,Sue Cook,等. Deriving melt rates at a complex ice shelf base using in‐situ radar: Application to Totten Ice Shelf[J]. Geophysical Research Letters,2021. |
APA | Irena Vaň.,ková.,Sue Cook.,J. Paul Winberry.,Keith W. Nicholls.,...&Fenzi.(2021).Deriving melt rates at a complex ice shelf base using in‐situ radar: Application to Totten Ice Shelf.Geophysical Research Letters. |
MLA | Irena Vaň,et al."Deriving melt rates at a complex ice shelf base using in‐situ radar: Application to Totten Ice Shelf".Geophysical Research Letters (2021). |
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